TSB-22-23-002

SUBJECT:
MAINTENANCE PROCEDURE IMPROVEMENT
FOR CVT – SERVICE MANUAL REVISION
No:
TSB-22-23-002
DATE:
April 2022
MODEL:
See below
CIRCULATE TO:
[ ] GENERAL MANAGER
[ X ] PARTS MANAGER
[ X ] TECHNICIAN
[ X ] SERVICE ADVISOR
[ X ] SERVICE MANAGER
[ X ] WARRANTY PROCESSOR
[ ] SALES MANAGER
PURPOSE
This TSB updates the Maintenance Procedure section, in the Automatic Transmission portion of the
affected Service Manual.
AFFECTED VEHICLES
•
•
2014 – 2022 Mirage
2017 - 2022 Mirage G4
AFFECTED SERVICE MANUAL
•
•
2014 – 2022 Mirage Service Manual, Group 23-Automatic Transmission, CVT
2017 - 2022 Mirage G4 Service Manual, Group 23-Automatic Transmission, CVT
PROCEDURE
Please use the following chart on pages 2-4 and replace the indicated pages in the 2014
- 2022 Mirage Service Manual, Group 23-Automatic Transmission, CVT and 2017 - 2022
Mirage G4 Service Manual, Group 23-Automatic Transmission, CVT.
Copyright 2022, Mitsubishi Motors North America, Inc.
The information contained in this bulletin is subject to change. For the latest version of this document, go to the Mitsubishi
Dealer Link, MEDIC, or the Mitsubishi Service Information website (www.mitsubishitechinfo.com).
04/28/2022
Page 1 of 68
(5207)
MIRAGE
TITLE
AFFECTED MANUAL
PART #
2014
MSCD-016B-2014 CVT
└ LUBRICANTS
MIRAGE
SERVICE MANUAL
CVT
└ DIAGNOSIS
2015
MSCD-016B-2015
└ DTC P0746: Abnormality in Hydraulic Control System Function
MIRAGE
CVT
SERVICE MANUAL
└ DIAGNOSIS
└ DTC P0796: Abnormality in Primary Pressure Solenoid Valve Function
2017
MSCD-016B-2017
CVT
MIRAGE
└ DIAGNOSIS
SERVICE MANUAL
└ DTC P0841: Abnormality in Secondary Pressure Sensor Function
CVT
└ DIAGNOSIS
└ DTC P2857: Auxiliary Gearbox Gear 1 Incorrect Ratio Run-up
CVT
└ DIAGNOSIS
└ DTC P2858: Auxiliary Gearbox Gear 2 Incorrect Ratio Run-up
CVT
└ DIAGNOSIS
└ DTC P2859: Auxiliary Gearbox Gear 1 Incorrect Ratio
CVT
└ DIAGNOSIS
└ DTC P285A: Auxiliary Gearbox Gear 2 Incorrect Ratio
CVT
└ SPECIAL TOOLS
Added
below CVT
└ ON-VEHICLE SERVICE.
└ SHIFT LOCK MECHANISM CHECK
MSCD-016B-2018 CVT
2018
└ LUBRICANTS
MIRAGE
SERVICE MANUAL
CVT
└ SPECIAL TOOLS
2019
MSCD-016B-2019 CVT
MIRAGE
└ DIAGNOSIS
SERVICE MANUAL
└ DTC P0746: Abnormality in Hydraulic Control System Function
CVT
2020
MSCD-016B-2020
└ DIAGNOSIS
MIRAGE
└ DTC P0796: Abnormality in Primary Pressure Solenoid Valve Function
SERVICE MANUAL
CVT
2021
MSCD-016B-2021 └ DIAGNOSIS
└ DTC P0841: Abnormality in Secondary Pressure Sensor Function
MIRAGE
CVT
SERVICE MANUAL
└ DIAGNOSIS
└ DTC P2857: Auxiliary Gearbox Gear 1 Incorrect Ratio Run-up
CVT
└ DIAGNOSIS
└ DTC P2858: Auxiliary Gearbox Gear 2 Incorrect Ratio Run-up
CVT
└ DIAGNOSIS
└ DTC P2859: Auxiliary Gearbox Gear 1 Incorrect Ratio
CVT
└ DIAGNOSIS
└ DTC P285A: Auxiliary Gearbox Gear 2 Incorrect Ratio
Added
below CVT
└ ON-VEHICLE SERVICE.
└ SHIFT LOCK MECHANISM CHECK
04/28/2022
Page 2 of 68
REVISED PAGES
PAGE 5
PAGE 6-8
PAGE 9-12
PAGE 13-14
PAGE 15-17
PAGE 18-20
PAGE 21-25
PAGE 26-29
PAGE 30
PAGE 31-35
PAGE 5
PAGE 30
PAGE 37-40
PAGE 41-45
PAGE 46-49
PAGE 50-53
PAGE 54-57
PAGE 58-63
PAGE 64-68
PAGE 31-35
(5207)
MIRAGE
AFFECTED MANUAL
PART #
TITLE
2022
MSCD-016B-2022 CVT
└ LUBRICANTS
MIRAGE
SERVICE MANUAL
CVT
└ SPECIAL TOOLS
CVT
└ DIAGNOSIS
└ DTC P0746: Abnormality in Hydraulic Control System Function
CVT
└ DIAGNOSIS
└ DTC P0796: Abnormality in Primary Pressure Solenoid Valve Function
CVT
└ DIAGNOSIS
└ DTC P0841: Abnormality in Secondary Pressure Sensor Function
CVT
└ DIAGNOSIS
└ DTC P2857: Auxiliary Gearbox Gear 1 Incorrect Ratio Run-up
CVT
└ DIAGNOSIS
└ DTC P2858: Auxiliary Gearbox Gear 2 Incorrect Ratio Run-up
CVT
└ DIAGNOSIS
└ DTC P2859: Auxiliary Gearbox Gear 1 Incorrect Ratio
CVT
└ DIAGNOSIS
└ DTC P285A: Auxiliary Gearbox Gear 2 Incorrect Ratio
Added
below
CVT
└ ON-VEHICLE SERVICE.
└ SHIFT LOCK MECHANISM CHECK
REVISED PAGES
PAGE 5
PAGE 30
PAGE 37-40
PAGE 41-45
PAGE 46-49
PAGE 50-53
PAGE 54-57
PAGE 58-63
PAGE 64-68
PAGE 31-35
MIRAGE G4
AFFECTED MANUAL
2017
MIRAGE G4
SERVICE MANUAL
PART #
MSCD-018B-2017 CVT
└ LUBRICANTS
04/28/2022
TITLE
REVISED PAGES
PAGE 5
CVT
└ DIAGNOSIS
└ DTC P0746: Abnormality in Hydraulic Control System Function
CVT
└ DIAGNOSIS
└ DTC P0796: Abnormality in Primary Pressure Solenoid Valve Function
CVT
└ DIAGNOSIS
└ DTC P0841: Abnormality in Secondary Pressure Sensor Function
CVT
└ DIAGNOSIS
└ DTC P2857: Auxiliary Gearbox Gear 1 Incorrect Ratio Run-up
CVT
└ DIAGNOSIS
└ DTC P2858: Auxiliary Gearbox Gear 2 Incorrect Ratio Run-up
CVT
└ DIAGNOSIS
└ DTC P2859: Auxiliary Gearbox Gear 1 Incorrect Ratio
CVT
└ DIAGNOSIS
└ DTC P285A: Auxiliary Gearbox Gear 2 Incorrect Ratio
CVT
└ SPECIAL TOOLS
Added
below
CVT
└ ON-VEHICLE SERVICE.
└ SHIFT LOCK MECHANISM CHECK
Page 3 of 68
PAGE 6-8
PAGE 9-12
PAGE 13-14
PAGE 15-17
PAGE 18-20
PAGE 21-25
PAGE 26-29
PAGE 30
PAGE 31-35
(5207)
MIRAGE G4
AFFECTED MANUAL
PART #
2018
MSCD-019B-2018
MIRAGE G4
SERVICE
MANUAL
MSCD-019B-2019
2019
MIRAGE G4
SERVICE
MANUAL
2020
MSCD-019B-2020
MIRAGE G4
SERVICE
MANUAL
2021
MIRAGE G4
SERVICE
MANUAL
2022
MIRAGE G4
SERVICE
MANUAL
MSCD-019B-2021
MSCD-019B-2022
04/28/2022
TITLE
REVISED PAGES
PAGE 5
CVT
└ LUBRICANTS
CVT
└ SPECIAL TOOLS
PAGE 30
CVT
└ DIAGNOSIS
└ DTC P0746: Abnormality in Hydraulic Control System Function
PAGE 37-40
CVT
PAGE 41-45
└ DIAGNOSIS
└ DTC P0796: Abnormality in Primary Pressure Solenoid Valve Function
CVT
└ DIAGNOSIS
└ DTC P0841: Abnormality in Secondary Pressure Sensor Function
CVT
└ DIAGNOSIS
└ DTC P2857: Auxiliary Gearbox Gear 1 Incorrect Ratio Run-up
CVT
└ DIAGNOSIS
└ DTC P2858: Auxiliary Gearbox Gear 2 Incorrect Ratio Run-up
CVT
└ DIAGNOSIS
└ DTC P2859: Auxiliary Gearbox Gear 1 Incorrect Ratio
CVT
└ DIAGNOSIS
└ DTC P285A: Auxiliary Gearbox Gear 2 Incorrect Ratio
Added
below CVT
└ ON-VEHICLE SERVICE.
└ SHIFT LOCK MECHANISM CHECK
CVT
└ LUBRICANTS
CVT
└ SPECIAL TOOLS
CVT
└ DIAGNOSIS
└ DTC P0746: Abnormality in Hydraulic Control System Function
CVT
└ DIAGNOSIS
└ DTC P0796: Abnormality in Primary Pressure Solenoid Valve Function
CVT
└ DIAGNOSIS
└ DTC P0841: Abnormality in Secondary Pressure Sensor Function
CVT
└ DIAGNOSIS
└ DTC P2857: Auxiliary Gearbox Gear 1 Incorrect Ratio Run-up
CVT
└ DIAGNOSIS
└ DTC P2858: Auxiliary Gearbox Gear 2 Incorrect Ratio Run-up
CVT
└ DIAGNOSIS
└ DTC P2859: Auxiliary Gearbox Gear 1 Incorrect Ratio
CVT
└ DIAGNOSIS
└ DTC P285A: Auxiliary Gearbox Gear 2 Incorrect Ratio
Added
below CVT
└ ON-VEHICLE SERVICE.
└ SHIFT LOCK MECHANISM CHECK
Page 4 of 68
PAGE 46-49
PAGE 50-53
PAGE 54-57
PAGE 58-63
PAGE 64-68
PAGE 31-35
PAGE 5
PAGE 30
PAGE 37-40
PAGE 41-45
PAGE 46-49
PAGE 50-53
PAGE 54-57
PAGE 58-63
PAGE 64-68
PAGE 31-35
(5207)
CVT
23A-3
LUBRICANTS
LUBRICANTS
M1231200400866
Item
Brand name
Capacity dm3 (qt)
Transmission fluid
MITSUBISHI MOTORS GENUINE CVTF-J4
7.0 (7.4)
Cleaning the transmission case Parts cleaner (MITSUBISHI MOTORS GENUINE
when CVT belt is inspected
Part No. MZ100387) or equivalent
As required

DIAGNOSIS
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
M1231213500283
Ask the customer about the trouble symptom.
NG
Transmission fluid check
Transmission fluid replacement
OK
Trouble symptom check
Communication with scan tool
(M.U.T.-III) is not possible
Inspection procedure
Read the diagnostic trouble code.
Diagnostic trouble
code is set
Diagnostic trouble
code is not set
Erase the diagnostic trouble code.
Trouble symptom check
Transmission range switch and APS check
Abnormal (Diagnostic trouble code is not set)
Road test
Normal
Abnormal
(Diagnostic trouble
code is set)
Read the diagnostic
trouble code again.
Diagnostic trouble
Diagnostic trouble
code is set.
code is not set.
To diagnostic trouble code chart
To trouble symptom chart
Determine the cause.
Determined
Not determined
Intermittent malfunction (Refer to GROUP 00 – NG
How to Cope with Intermittent Malfunction)
Repair
OK
NG
04/28/2022
Check (Road test)
OK
Complete
Page 5 of 68
ACC06961
(5207)
CVT
23A-40
DIAGNOSIS
DTC P0746: Abnormality in Hydraulic Control System Function
.
DIAGNOSTIC FUNCTION
If the pulley ratio, which is calculated according to
the primary pulley speed and the secondary pulley
speed, exceeds the standard value, the TCM determines that the line pressure is abnormal.
.
DESCRIPTIONS OF MONITOR METHODS
 The ratio between the primary pulley speed and
the secondary pulley speed is 2.55 or more for
0.2 seconds, or 3.35 or more for 0.1 second.
.
MONITOR EXECUTION




Transmission range:D, R or B
Primary speed: 500 r/min or more
Acceleration: -0.05G or more
Engine speed: 450 r/min or more
.
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
 P0705: Malfunction of transmission range switch
 P0715: Malfunction of primary pulley speed sensor
 P0720: Abnormality in output speed sensor
 P0791: Malfunction of the secondary pulley
speed sensor
 U0001: Malfunction of CAN communication
 U0100: CAN time-out error (engine)
Sensor (The sensor below is determined to be
normal)
 Transmission range switch
 Primary pulley speed sensor
 Output speed sensor
 Secondary pulley speed sensor
.
04/28/2022
Page 6 of 68
(5207)
CVT
23A-41
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence)
START
All secondary parameters
are in the enable condition.
No
Yes
No
Ratio > 3.35
Yes
No
Continuous failure
for 0.1 sec
Yes
No
Ratio > 2.55
Yes
No
Continuous failure
for 0.2 sec
Yes
Good
Malfunction

• Malfunction of the valve body assembly
(Faulty line pressure solenoid valve)
• Malfunction of the transaxle
assembly
ACC07017
END
 Pulley ratio (primary pulley speed/secondary pulley speed) more than 3.35 for 0.1 second.
.
DTC SET CONDITIONS
Check Conditions
 Transmission range switch position: D, R or B.
 Engine speed: 450 r/min or more.
 Primary pulley speed: 500 r/min or more.
 Acceleration: -0.05G or more
.
OBD-II DRIVE CYCLE PATTERN
The vehicle is driven for at least 10 seconds with the
accelerator opening angle at 20% or more.
.
Judgment Criteria
 Pulley ratio (primary pulley speed/secondary pulley speed) more than 2.55 for 0.2 second.
04/28/2022
PROBABLE CAUSES

 Malfunction of the transaxle assembly (Faulty line
pressure solenoid valve or valve body assembly)
Page 7 of 68
(5207)
23A-42
CVT
DIAGNOSIS
DIAGNOSIS
STEP 1. Check the following connector
 CVT assembly connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the defective connector.
STEP 2. Measure the output wave pattern of the line
pressure solenoid valve at TCM connector (PLLS
terminal).
(1) Connect the CVT assembly connector.
(2) Selector lever position: P range.
(3) Engine: Idling
(4) Connect an oscilloscope, and measure the voltage between

TCM connector PLLS terminal and body ground.
OK: A wave pattern such as the one shown on
STEP 4. CVT belt inspection.
Check the appearance of the CVT belt.
P.23A-116 (Check Procedure Using an Oscillo(Refer to On-vehicle Service – CVT Belt Inspection)
scope) should be output, and the maximum value
should be 11 V or more and the minimum value
Q: Is the CVT belt normal?
should be 1 V or less. There should be no noise in
YES : Replace the valve body assembly.
the output wave pattern.
NO : Replace the transaxle assembly.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to diagnostic trouble code No.P0962: Line
Pressure Solenoid Valve (short to ground) P.23A-60,
or diagnostic trouble code No.P0963: Line Pressure
Solenoid Valve (open circuit/ short to power supply)
P.23A-62.
STEP 3. Symptom recheck after erasing diagnostic trouble
code
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch to the LOCK (OFF) position, and
then wait for one minute. Then drive the vehicle until the
engine has been warmed up.
(3) Check if the diagnostic trouble code is stored.
Q: Is the diagnostic trouble code stored?

YES : Replace the transaxle assembly.
Go to Step 4.
NO : Intermittent malfunction (Refer to GROUP 00  How
to Cope with Intermittent Malfunctions P.00-13.).
DTC P0791: Malfunction of Secondary Pulley Speed Sensor
.
.
DIAGNOSTIC FUNCTION
The TCM determines whether the system is defective by monitoring the secondary pulley speed sensor. 04/28/2022
Page 8 of 68
(5207)
CVT
23A-46
DIAGNOSIS
STEP 6. Measure the output wave pattern of the secondary
pulley speed sensor at TCM connector (SECS terminal).
(1) Connect the secondary pulley speed sensor connector and
TCM connector.
(2) Selector lever position: D range.
(3) Drive at a constant speed of approx. 20 km/h.
(4) Connect an oscilloscope, and measure the voltage between
TCM connector SECS terminal and body ground.
OK: A wave pattern such as the one shown on
P.23A-116 (Check Procedure Using an Oscilloscope) should be output, and the maximum value
should be 11 V or more and the minimum value
should be 1 V or less. There should be no noise in
the output wave pattern.
Q: Is the check result normal?
YES : Go to Step 7.
NO : Replace the secondary pulley speed sensor.
STEP 7. Symptom recheck after erasing diagnostic trouble
code
Q: Is the diagnostic trouble code stored?
YES : Replace the TCM.
NO : Intermittent malfunction (Refer to GROUP 00  How
to Cope with Intermittent Malfunctions P.00-13.).
DTC P0796: Abnormality in Primary Pressure Solenoid Valve Function
.
DIAGNOSTIC FUNCTION
If the actual pulley ratio does not track with the target
ratio, the TCM determines whether the system is
defective
.
DESCRIPTIONS OF MONITOR METHODS
 If the actual pulley ratio remains 2.0 to 2.55 for
five seconds when the target pulley ratio is 1.2 or
less, or if the actual pulley ratio remains 0.2 to
0.75 for five seconds when the target pulley ratio
is 1.55 or more, the TCM determines that a malfunction exists.
.
MONITOR EXECUTION




Transmission range: D, R or B
Engine speed: 450 r/min or more
Primary pulley speed: 306 r/min or more
Secondary pulley speed: 230 r/min or more
.
04/28/2022
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
 P0705: Malfunction of transmission range switch
 P0715: Malfunction of primary pulley speed sensor
 P0746: Abnormality in hydraulic control system
 P0791: Malfunction of the secondary pulley
speed sensor
 P0842, P0843: Malfunction of the secondary
pressure sensor
 P0962, P0963: Malfunction of the line pressure
solenoid valve
 P0970, P0971: Malfunction of the primary pressure solenoid valve
 U0001: Malfunction of CAN communication
 U0100: CAN time-out error (engine)
Sensor (The sensor below is determined to be
normal)
 Transmission range switch
 Primary pulley speed sensor
Page 9 of 68
(5207)
CVT
23A-47
DIAGNOSIS
 Secondary pulley speed sensor
 Secondary pressure sensor
 Line pressure solenoid valve
 Primary pressure solenoid valve
.
LOGIC FLOW CHARTS (Monitor SequenceOutput Functional Low)
START
No
All secondary parameters
are in the enable condition.
Yes
Ratio >= 2.0
and
Ratio <= 2.55
No
Yes
No
Continuous failure
for 5 sec
Yes
Malfunction
Good
END
ACC07021
.
04/28/2022
Page 10 of 68
(5207)
CVT
23A-48
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor SequenceOutput Functional High)
START
No
All secondary parameters
are in the enable condition.
Yes
No
Ratio <= 0.75
Yes
No
Continuous failure
for 5 sec
Yes
Malfunction
Good

• Malfunction of the valve body assembly
(Faulty line pressure solenoid valve)
ACC07020
• Malfunction of the transaxle assembly
END
 When the target pulley ratio (primary pulley
speed/secondary pulley speed) is more than 1.55
while the vehicle is being driven, the actual pulley
ratio remains from 0.75 or less for five seconds.
.
DTC SET CONDITIONS
Check Conditions
 Transmission range switch position: D, R or B.
 Engine speed: 450 r/min or more.
 Primary pulley speed: 306 r/min or more.
 Secondary pulley speed: 230 r/min or more.
.
OBD-II DRIVE CYCLE PATTERN
Judgment Criteria
 When the target pulley ratio (primary pulley
speed/secondary pulley speed) is less than 1.2
while the vehicle is being driven, the actual pulley
ratio remains from 2.0 to 2.55 for five seconds.
The vehicle is driven for at least 10 seconds with the
accelerator opening angle at 20% or more.
.
PROBABLE CAUSES
 Malfunction of the transaxle assembly (Faulty primary pressure solenoid valve or valve body
 assembly)
04/28/2022
Page 11 of 68
(5207)
CVT
23A-49
DIAGNOSIS
DIAGNOSIS
STEP 1. Check the following connector
 CVT assembly connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the defective connector.
STEP 2. Measure the output wave pattern of the primary
pressure solenoid valve at TCM connector (PRLS
terminal).
(1) Connect the CVT assembly connector.
(2) Selector lever position: P range.
(3) Engine: Idling
(4) Connect an oscilloscope, and measure the voltage between
TCM connector PRLS terminal and body ground.
OK: A wave pattern such as the one shown on
P.23A-116 (Check Procedure Using an Oscilloscope) should be output, and the maximum value
should be 11 V or more and the minimum value
should be 1 V or less. There should be no noise in
the output wave pattern.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to diagnostic trouble code No.P0970: Primary
Pressure Solenoid Valve (short to ground) P.23A-64,
or diagnostic trouble code No.P0971: Primary
Pressure Solenoid Valve (open circuit/ short to power
supply) P.23A-66.
STEP 3. Symptom recheck after erasing diagnostic trouble
code
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch to the LOCK (OFF) position, and
then wait for one minute. Then drive the vehicle until the
engine has been warmed up.
(3) Check if the diagnostic trouble code is stored.
Q: Is the diagnostic trouble code stored?
YES : Replace the transaxle assembly.

Go to Step 4.
NO : Intermittent malfunction (Refer to GROUP 00  How
to Cope with Intermittent Malfunctions P.00-13.).
 STEP 4. CVT belt inspection.
Check the appearance of the CVT belt.
(Refer to On-vehicle Service – CVT Belt Inspection)
Q: Is the CVT belt normal?
YES : Replace the valve body assembly.
NO : Replace the transaxle assembly.
04/28/2022
Page 12 of 68
(5207)
CVT
23A-50
DIAGNOSIS
DTC P0841: Abnormality in Secondary Pressure Sensor Function
.
.
DIAGNOSTIC FUNCTION
PROBABLE CAUSES
TCM determines that the system is defective by
monitoring the secondary pressure sensor.
.

 Malfunction of the transaxle assembly (Faulty
secondary pressure sensor or valve body assembly)
JUDGMENT CRITERIA
 The difference between the actual and target sec• Malfunction of the valve body assembly
ondary pressures remains more than 0.675 MPa
for five seconds while the vehicle is driven at con-  (Faulty secondary pressure sensor)
• Malfunction of the transaxle assembly
stant speed.
DIAGNOSIS
STEP 1. Hydraulic pressure test
Refer to P.23A-130.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the failure sections.
STEP 2. Check the following connector
 TCM connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Repair the defective connector.
STEP 3. Voltage measurement at TCM connector (LPRS
terminal)
(1) Connect the TCM connector.
(2) Drive the vehicle until the engine is warmed up.
(3) Selector lever position: P range.
(4) Engine: Idling
(5) Measure the TCM connector side by backprobing.
(6) Measure the voltage between the TCM connector (LPRS
terminal) and TCM connector (SGND terminal).
OK: approx. 0.84 V
Q: Is the check result normal?
YES : Go to Step 4.
NO : Refer to diagnostic trouble code No.P0842:
Secondary Pressure Sensor (low voltage) P.23A-51,
or diagnostic trouble code No.P0843: Secondary
Pressure Sensor (high voltage) P.23A-53.
04/28/2022
Page 13 of 68
(5207)
CVT
DIAGNOSIS
23A-51

STEP 4. Symptom recheck after erasing diagnostic trouble
STEP 5. CVT belt inspection.
code
Check the appearance of the CVT belt.
(Refer to On-vehicle Service – CVT Belt Inspection)
Q: Is the diagnostic trouble code stored?

Q: Is the CVT belt normal?
YES : Replace the transaxle assembly.
Go to Step 5.
YES : Replace the valve body assembly.
NO : Intermittent malfunction (Refer to GROUP 00  How
NO : Replace the transaxle assembly.
to Cope with Intermittent Malfunctions P.00-13.).
DTC P0842: Malfunction of the Secondary Pressure Sensor (low voltage)
MONITOR EXECUTION
.
DIAGNOSTIC FUNCTION
The TCM determines that the system is defective
when the secondary pressure sensor output voltage
is lower than a predetermined value.
.
DESCRIPTIONS OF MONITOR METHODS
 The status with the fluid temperature of 20C
(4F) or more and with the secondary pressure
sensor voltage of 0.09 volt or less continues for 5
seconds.
.
 Transmission fluid temperature: 20C (4F) or
more
.
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
 Not applicable
Sensor (The sensor below is determined to be
normal)
 Not applicable
.
04/28/2022
Page 14 of 68
(5207)
CVT
23A-84
DIAGNOSIS
DIAGNOSIS
STEP 1. Check the following connector
 CVT assembly connector
 TCM connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the defective connector(s).
STEP 2. Check for short to ground in LULS line between
the CVT assembly connector and the TCM connector
Q: Is the check result normal?
YES : Go to Step 3.
NO : Repair the wiring harness.
STEP 3. Lockup solenoid valve check
Refer to P.23A-126.
Q: Is the check result normal?
YES : Go to Step 4.
NO : Replace the transaxle assembly.
STEP 4. Symptom recheck after erasing diagnostic trouble
code
Q: Is the diagnostic trouble code stored?
YES : Replace the TCM.
NO : Intermittent malfunction (Refer to GROUP 00  How
to Cope with Intermittent Malfunctions P.00-13.).
DTC P2857: Auxiliary Gearbox Gear 1 Incorrect Ratio Run-up
.
.
DIAGNOSTIC FUNCTION
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
The TCM determines that the system is defective
when the auxiliary gearbox remains at incorrect ratio
although the TCM commands the 1st gear.
.
DESCRIPTIONS OF MONITOR METHODS
 The gear ratio is 2.232 or more for two seconds
while the TCM is shifting the auxiliary gear to 1st
gear.
.
MONITOR EXECUTION






Accelerator pedal opening angle: 7.8% or more
Engine speed: 450 r/min or more
Output shaft speed: 300 r/min or more
Secondary pulley speed: 300 r/min or more
Transmission range: D or B
Target auxiliary gear position: 1st
04/28/2022
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
 P0705: Malfunction of the transmission range
switch
 P0720: Malfunction of the output speed sensor
 P0791: Malfunction of the secondary pulley
speed sensor
 P0973, P0974: Malfunction of the low brake solenoid valve
 P0976, P0977: Malfunction of the high clutch and
reverse brake solenoid valve
 P2858: 2nd gear neutral malfunction
 P2859: 1st gear ratio malfunction
 P285A: 2nd gear ratio malfunction
 U0001: Malfunction of CAN communication
Page 15 of 68
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CVT
23A-85
DIAGNOSIS
 U0100: CAN time-out error (engine)




Sensor (The sensor below is determined to be
normal)
 Transmission range switch
Secondary pulley speed sensor
Output speed sensor
Low brake solenoid valve
High clutch and reverse brake solenoid valve
.
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
Actual auxiliary gear ratio
> 2.232
No
Yes
No
Continuous failure
for 2 sec
Yes
Malfunction
Good
END
ACC07031
 Output shaft speed: 300 r/min or more
 Secondary pulley speed: 300 r/min or more
 Target auxiliary gear position: 1st
.
DTC SET CONDITIONS
Check Conditions
 Voltage of battery: 10 volts or more.
Judgment Criteria
 Voltage of battery: 16.5 volts or less.
 While the vehicle is being driven, the actual gear
 Transmission range: D or B
ratio of the auxiliary gearbox remains more than
 Accelerator pedal position sensor (main) output
2.232 for two seconds although the TCM comvoltage: 1.23V or more (Opening angle: 7.8% or
mands the 1st gear.
more)
 Engine
speed: 450 r/min or more
04/28/2022
Page 16 of 68
(5207)
.
23A-86
OBD-II DRIVE CYCLE PATTERN
CVT
DIAGNOSIS
.
PROBABLE CAUSES
Accelerate to 40 km/h (24.9 mph) slowly with the
 Malfunction of the transaxle assembly (Faulty low

accelerator opening angle at 10% or more.
brake solenoid valve or valve body assembly)
 • Malfunction of the valve body assembly
(Faulty low brake solenoid valve)
DIAGNOSIS • Malfunction of the transaxle assembly
STEP 1. Check the following connector
 CVT assembly connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the defective connector.
STEP 2. Measure the output wave pattern of the low brake
solenoid valve at TCM connector (LBLS terminal).
(1) Connect the CVT assembly connector.
(2) Selector lever position: D range.
(3) Drive at a constant speed of approx. 20 km/h (auxiliary
gearbox: at 1st gear)
(4) Connect an oscilloscope, and measure the voltage between

TCM connector LBLS terminal and body ground.
STEP 4. CVT belt inspection.
OK: A wave pattern such as the one shown on
Check the appearance of the CVT belt.
P.23A-116 (Check Procedure Using an Oscillo(Refer to On-vehicle Service – CVT Belt Inspection)
scope) should be output, and the maximum value
Q: Is the CVT belt normal?
should be 11 V or more and the minimum value
YES : Replace the valve body assembly.
should be 1 V or less. There should be no noise in
NO : Replace the transaxle assembly.
the output wave pattern.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to diagnostic trouble code No.P0973: Low
Brake Solenoid Valve (short to ground) P.23A-68, or
diagnostic trouble code No.P0974: Low Brake
Solenoid Valve (open circuit/ short to power supply)
P.23A-70.
STEP 3. Symptom recheck after erasing diagnostic trouble
code
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch to the LOCK (OFF) position, and
then wait for one minute. Then drive the vehicle until the
engine has been warmed up.
(3) Check if the diagnostic trouble code is stored.
Q: Is the diagnostic trouble code stored?

YES : Replace the transaxle assembly.
Go to Step 4.
NO : Intermittent malfunction (Refer to GROUP 00  How
to Cope with Intermittent Malfunctions P.00-13.).
04/28/2022
Page 17 of 68
(5207)
CVT
DIAGNOSIS
23A-87
DTC P2858: Auxiliary Gearbox Gear 2 Incorrect Ratio Run-up
 P0720: Malfunction of the output speed sensor
 P0791: Malfunction of the secondary pulley
speed sensor
 P0973, P0974: Malfunction of the low brake solenoid valve
 P0976, P0977: Malfunction of the high clutch and
reverse brake solenoid valve
 P2857: 1st gear neutral malfunction
 P2859: 1st gear ratio malfunction
 P285A: 2nd gear ratio malfunction
 U0001: Malfunction of CAN communication
 U0100: CAN time-out error (engine)
.
DIAGNOSTIC FUNCTION
The TCM determines that the system is defective
when the auxiliary gearbox remains at incorrect ratio
although the TCM commands the 2nd gear.
.
DESCRIPTIONS OF MONITOR METHODS
 The gear ratio is 2.232 or more for at least two
seconds while the TCM is shifting the auxiliary
gear to 2nd gear.
.
MONITOR EXECUTION






Accelerator pedal opening angle: 7.8% or more
Engine speed: 450 r/min or more
Output shaft speed: 300 r/min or more
Secondary pulley speed: 300 r/min or more
Transmission range: D or B
Target auxiliary gear position: 2nd
.
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Sensor (The sensor below is determined to be
normal)
 Transmission range switch
 Secondary pulley speed sensor
 Output speed sensor
 Low brake solenoid valve
 High clutch and reverse brake solenoid valve
.
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
 P0705: Malfunction of the transmission range
switch
04/28/2022
Page 18 of 68
(5207)
CVT
23A-88
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
No
Actual auxiliary gear ratio
> 2.232
Yes
No
Continuous failure
for 2 sec
Yes
Malfunction
Good

END
• Malfunction of the valve body assembly
(Faulty high clutch and reverseACC07035
brake solenoid valve)
• Malfunction of the transaxle assembly
.
DTC SET CONDITIONS
Check Conditions
 Voltage of battery: 10 volts or more.
 Voltage of battery: 16.5 volts or less.
 Transmission range: D or B
 Accelerator pedal position sensor (main) output
voltage: 1.23V or more (Opening angle: 7.8% or
more)
 Engine speed: 450 r/min or more
 Output shaft speed: 300 r/min or more
 Secondary pulley speed: 300 r/min or more
 Target auxiliary gear position: 2nd
Judgment Criteria
 While the vehicle is being driven, the actual gear
ratio of the auxiliary gearbox remains more than
2.232 for two seconds although the TCM commands the 2nd gear.
.
OBD-II DRIVE CYCLE PATTERN
Drive at 40 km/h (24.9 mph) for at least five seconds
with the accelerator opening angle at 10% or more.
.
PROBABLE CAUSES
 Malfunction of the transaxle assembly (Faulty
 high clutch and reverse brake solenoid valve or
valve body assembly)
04/28/2022
Page 19 of 68
(5207)
CVT
DIAGNOSIS
23A-89
DIAGNOSIS
STEP 1. Check the following connector
 CVT assembly connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the defective connector.
STEP 2. Measure the output wave pattern of the high
clutch and reverse brake solenoid valve at TCM connector
(HRLS terminal).
(1) Connect the CVT assembly connector.
(2) Selector lever position: D range.
(3) Drive at a constant speed of approx. 20 km/h (auxiliary
gearbox: at 2nd gear)
(4) Connect an oscilloscope, and measure the voltage between

TCM connector HRLS terminal and body ground.
STEP 4. CVT belt inspection.
OK: A wave pattern such as the one shown on
Check the appearance of the CVT belt.
P.23A-116 (Check Procedure Using an Oscillo(Refer to On-vehicle Service – CVT Belt Inspection)
scope) should be output, and the maximum value
Q: Is the CVT belt normal?
should be 11 V or more and the minimum value
should be 1 V or less. There should be no noise in
YES : Replace the valve body assembly.
the output wave pattern.
NO : Replace the transaxle assembly.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to diagnostic trouble code No.P0976: High
Clutch and Reverse Brake Solenoid Valve (short to
ground) P.23A-72, or diagnostic trouble code
No.P0977: High Clutch and Reverse Brake Solenoid
Valve (open circuit/ short to power supply) P.23A-74.
STEP 3. Symptom recheck after erasing diagnostic trouble
code
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch to the LOCK (OFF) position, and
then wait for one minute. Then drive the vehicle until the
engine has been warmed up.
(3) Check if the diagnostic trouble code is stored.
Q: Is the diagnostic trouble code stored?

YES : Replace the transaxle assembly.
Go to Step 4.
NO : Intermittent malfunction (Refer to GROUP 00  How
to Cope with Intermittent Malfunctions P.00-13.).
04/28/2022
Page 20 of 68
(5207)
CVT
23A-90
DIAGNOSIS
DTC P2859: Auxiliary Gearbox Gear 1 Incorrect Ratio
 Acceleration: 0.05 G or less 
 Target auxiliary gear position: 1st
 The target pressure for the high clutch and
reverse brake solenoid valve is 0 MPa or less
.
.
DIAGNOSTIC FUNCTION
The TCM determines that the system is defective
when the auxiliary gearbox remains the gear ratio is
abnormal although the TCM commands the 1st gear.
.
DESCRIPTIONS OF MONITOR METHODS
 The system determines that a fault has occurred
when the gear ratio is within  10% of the 2nd
gear ratio (0.900  1.100) for at least 0.5 seconds
while the TCM is shifting the auxiliary gear to 1st
gear.
 The system determines that a fault has occurred
when the gear ratio is 0.911 or less, or 2.732 or
more for at least 0.2 seconds while the TCM is
shifting the auxiliary gear to 1st gear.
 If the high clutch pressure switch remains on for
at least 1.5 seconds while the TCM is shifting the
auxiliary gear to 1st gear, the system determines
that a fault has occurred.
.
MONITOR EXECUTION
 Accelerator pedal opening angle: 7.8% or more

 Vehicle speed: 10 km/h (6 mph) or more 
 Vehicle speed: 10 km/h (6 mph) or less 
 Engine speed: 450 r/min or more
 Output shaft speed: 300 r/min or more 
 Secondary pulley speed: 300 r/min or more

 Transmission range: D or B
.
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
 P0705: Malfunction of the transmission range
switch
 P0715: Malfunction of primary pulley speed sensor
 P0720: Malfunction of the output speed sensor
 P0791: Malfunction of the secondary pulley
speed sensor
 P0876: Malfunction of the high clutch pressure
switch
 P0973, P0974: Malfunction of the low brake solenoid valve
 P0976, P0977: Malfunction of the high clutch and
reverse brake solenoid valve
 P2857: 1st gear neutral malfunction
 P2858: 2nd gear neutral malfunction
 P285A: 2nd gear ratio malfunction
 U0001: Malfunction of CAN communication
 U0100: CAN time-out error (engine)
Sensor (The sensor below is determined to be
normal)
 Transmission range switch
 Primary pulley speed sensor
 Output speed sensor
 Secondary pulley speed sensor
 Low brake solenoid valve
 High clutch and reverse brake solenoid valve
.
04/28/2022
Page 21 of 68
(5207)
CVT
23A-91
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
Actual auxiliary gear ratio
= 2nd
No
Yes
No
Continuous failure
for 0.5 sec
Yes
Malfunction
Good
END
ACC07032
 Engine speed: 450 r/min or more
 Output shaft speed: 300 r/min or more
 Secondary pulley speed: 300 r/min or more
.
DTC SET CONDITIONS
Check Conditions
 Target auxiliary gear position: 1st
 Voltage of battery: 10 volts or more.
 Voltage of battery: 16.5 volts or less.
 Transmission range: D or B
 Accelerator pedal position sensor (main) output
voltage: 1.23 volts or more
04/28/2022
Judgment Criteria
 The actual gear ratio of the auxiliary gearbox
deviates by 10% or less from the 2nd gear ratio
(0.900  1.100) for 0.5 seconds.
.
Page 22 of 68
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CVT
23A-92
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
Yes
Actual auxiliary gear ratio
>= 2.732
No
Yes
Actual auxiliary gear ratio
<= 0.911
No
No
Continuous failure
for 0.2 sec
Yes
Malfunction
Good
END
ACC07033
 Output shaft speed: 300 r/min or more
 Secondary pulley speed: 300 r/min or more
 Acceleration: -0.05G or less
.
DTC SET CONDITIONS
Check Conditions
 Target auxiliary gear position: 1st
 Voltage of battery: 10 volts or more.
 Voltage of battery: 16.5 volts or less.
 Transmission range: D or B
 Vehicle speed: 10 km/h (6 mph) or more
 Engine speed: 450 r/min or more
04/28/2022
Judgment Criteria
 The actual gear ratio of the auxiliary gearbox
deviates by 50% or more from the 1st gear ratio
(0.911 or less, 2.732 or more) for 0.2 seconds.
.
Page 23 of 68
(5207)
CVT
23A-93
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
No
Fluid pressure switch
status is "ON"
Yes
No
Continuous for 1.5 sec
Yes
Malfunction
Good

• Malfunction of the valve body assembly
(Faulty high clutch and reverse brake solenoid valve)
• Malfunction of the transaxle assembly
ACC07034
END
.
DTC SET CONDITIONS
Check Conditions
 Target auxiliary gear position: 1st
 The target pressure for the high clutch and
reverse brake solenoid valve is 0 MPa or less.
 Voltage of battery: 10 volts or more.
 Voltage of battery: 16.5 volts or less.
 Transmission range: D or B
 Vehicle speed: 10 km/h (6 mph) or more
 Engine speed: 450 r/min or more
04/28/2022
Judgment Criteria
 The high clutch oil pressure switch is ON for 1.5
seconds.
.
OBD-II DRIVE CYCLE PATTERN
Accelerate to 50 km/h (31.1 mph) slowly and then
stop the vehicle for at least five seconds with the
accelerator opening angle at 10% or more.
.
PROBABLE CAUSES
 Malfunction of the transaxle assembly (Faulty
 high clutch and reverse brake solenoid valve or
valve body assembly)
Page 24 of 68
(5207)
23A-94
CVT
DIAGNOSIS
DIAGNOSIS
STEP 1. Check the following connector
 CVT assembly connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the defective connector.
STEP 2. Measure the output wave pattern of the high
clutch and reverse brake solenoid valve at TCM connector
(HRLS terminal).
(1) Connect the CVT assembly connector.
(2) Selector lever position: D range.
(3) Drive at a constant speed of approx. 20 km/h (auxiliary
gearbox: at 1st gear)
(4) Connect an oscilloscope, and measure the voltage between

TCM connector HRLS terminal and body ground.
STEP 4. CVT belt inspection.
OK: A wave pattern such as the one shown on
Check the appearance of the CVT belt.
P.23A-116 (Check Procedure Using an Oscillo(Refer to On-vehicle Service – CVT Belt Inspection)
scope) should be output, and the maximum value
Q: Is the CVT belt normal?
should be 11 V or more and the minimum value
should be 1 V or less. There should be no noise in
YES : Replace the valve body assembly.
the output wave pattern.
NO : Replace the transaxle assembly.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to diagnostic trouble code No.P0976: High
Clutch and Reverse Brake Solenoid Valve (short to
ground) P.23A-72, or diagnostic trouble code
No.P0977: High Clutch and Reverse Brake Solenoid
Valve (open circuit/ short to power supply) P.23A-74.
STEP 3. Symptom recheck after erasing diagnostic trouble
code
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch to the LOCK (OFF) position, and
then wait for one minute. Then drive the vehicle until the
engine has been warmed up.
(3) Check if the diagnostic trouble code is stored.
Q: Is the diagnostic trouble code stored?
YES : Replace the transaxle assembly.

Go to Step 4.
NO : Intermittent malfunction (Refer to GROUP 00  How
to Cope with Intermittent Malfunctions P.00-13.).
04/28/2022
Page 25 of 68
(5207)
CVT
DIAGNOSIS
23A-95
DTC P285A: Auxiliary Gearbox Gear 2 Incorrect Ratio
 Target auxiliary gear position: 2nd
.
DIAGNOSTIC FUNCTION
The TCM determines that the system is defective
when the auxiliary gearbox remains the gear ratio is
abnormal although the TCM commands the 2nd
gear.
.
DESCRIPTIONS OF MONITOR METHODS
 The system determines that a fault has occurred
when the gear ratio is within  10% of the 1st
gear ratio (1.639  2.003) for at least 0.5 seconds
while the TCM is shifting the auxiliary gear to 2nd
gear.
 The system determines that a fault has occurred
when the gear ratio is 0.500 or less, or 1.500 or
more for at least 0.2 seconds while the TCM is
shifting the auxiliary gear to 2nd gear.
.
MONITOR EXECUTION
 Accelerator pedal opening angle: 7.8% or more

 Vehicle speed: 10 km/h (6 mph) or more 
 Engine speed: 450 r/min or more
 Output shaft speed: 300 r/min or more
 Secondary pulley speed: 300 r/min or more
 Transmission range: D or B
 Acceleration: -0.05G or less 
04/28/2022
.
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
 P0705: Malfunction of the transmission range
switch
 P0720: Malfunction of the output speed sensor
 P0791: Malfunction of the secondary pulley
speed sensor
 P0973, P0974: Malfunction of the low brake solenoid valve
 P0976, P0977: Malfunction of the high clutch and
reverse brake solenoid valve
 P2857: 1st gear neutral malfunction
 P2858: 2nd gear neutral malfunction
 P2859: 1st gear ratio malfunction
 U0001: Malfunction of CAN communication
 U0100: CAN time-out error (engine)
Sensor (The sensor below is determined to be
normal)
 Transmission range switch
 Output speed sensor
 Secondary pulley speed sensor
 Low brake solenoid valve
 High clutch and reverse brake solenoid valve
.
Page 26 of 68
(5207)
CVT
23A-96
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
Actual auxiliary gear ratio
= 1st
No
Yes
No
Continuous failure
for 0.5 sec
Yes
Malfunction
Good
END
ACC07036
 Engine speed: 450 r/min or more
 Secondary pulley speed: 300 r/min or more
 Output shaft speed: 300 r/min or more
.
DTC SET CONDITIONS
Check Conditions
 Target auxiliary gear position: 2nd
 Voltage of battery: 10 volts or more.
 Voltage of battery: 16.5 volts or less.
 Transmission range: D or B
 Accelerator pedal position sensor (main) output
voltage: 1.23 volts or more
04/28/2022
Judgment Criteria
 The actual gear ratio of the auxiliary gearbox
deviates by 10% or less from the 1st gear ratio
(1.639  2.003) for 0.5 seconds.
.
Page 27 of 68
(5207)
CVT
23A-97
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
Yes
Actual auxiliary gear ratio
>= 1.500
No
Yes
Actual auxiliary gear ratio
<= 0.500
No
No
Continuous failure
for 0.2 sec
Yes
Malfunction
Good

END
• Malfunction of the valve body assembly
(Faulty low brake solenoid valve)
• Malfunction of the transaxle assembly
.
DTC SET CONDITIONS
Check Conditions
 Target auxiliary gear position: 2nd
 Voltage of battery: 10 volts or more.
 Voltage of battery: 16.5 volts or less.
 Transmission range: D or B
 Vehicle speed: 10 km/h (6 mph) or more
 Engine speed: 450 r/min or more
 Secondary pulley speed: 300 r/min or more
 Output shaft speed: 300 r/min or more
 Acceleration: -0.05G or less
04/28/2022
ACC07037
Judgment Criteria
 The actual gear ratio of the auxiliary gearbox
deviates by 50% or more from the 2nd gear ratio
(0.500 or less, 1.500 or more) for 0.2 seconds.
.
OBD-II DRIVE CYCLE PATTERN
Drive at 40 km/h (24.9 mph) for at least five seconds
with the accelerator opening angle at 10% or more.
.
PROBABLE CAUSES
  Malfunction of the transaxle assembly (Faulty low
brake solenoid valve or valve body assembly)
Page 28 of 68
(5207)
CVT
23A-98
DIAGNOSIS
DIAGNOSIS
STEP 1. Check the following connector
 CVT assembly connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the defective connector.
STEP 2. Measure the output wave pattern of the low brake
solenoid valve at TCM connector (LBLS terminal).
(1) Connect the CVT assembly connector.
(2) Selector lever position: D range.
(3) Drive at a constant speed of approx. 20 km/h (auxiliary
gearbox: at 2nd gear)
(4) Connect an oscilloscope, and measure the voltage between

TCM connector LBLS terminal and body ground.
STEP 4. CVT belt inspection.
OK: A wave pattern such as the one shown on
Check the appearance of the CVT belt.
P.23A-116 (Check Procedure Using an Oscillo(Refer to On-vehicle Service – CVT Belt Inspection)
scope) should be output, and the maximum value
Q: Is the CVT belt normal?
should be 11 V or more and the minimum value
YES : Replace the valve body assembly.
should be 1 V or less. There should be no noise in
NO : Replace the transaxle assembly.
the output wave pattern.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to diagnostic trouble code No.P0973: Low
Brake Solenoid Valve (low input) P.23A-68, or
diagnostic trouble code No.P0974: Low Brake
Solenoid Valve (high input) P.23A-70.
STEP 3. Symptom recheck after erasing diagnostic trouble
code
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch to the LOCK (OFF) position, and
then wait for one minute. Then drive the vehicle until the
engine has been warmed up.
(3) Check if the diagnostic trouble code is stored.
Q: Is the diagnostic trouble code stored?

YES : Replace the transaxle assembly.
Go to Step 4.
NO : Intermittent malfunction (Refer to GROUP 00  How
to Cope with Intermittent Malfunctions P.00-13.).
DTC U0001: Malfunction of CAN Communication Circuit
.
.
DIAGNOSTIC FUNCTION
DESCRIPTIONS OF MONITOR METHODS
The TCM determines that the system is defective if
CAN communication information cannot be sent or
received.
04/28/2022
 TCM cannot receive the periodic communication
data.
.
Page 29 of 68
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CVT
23A-120
ON-VEHICLE SERVICE
Tool
Tool number and Supersession
name
Use
MB991895
Engine hanger
Tool not available
When the engine hanger is used:
Supporting the engine assembly
during removal and installation of the
transaxle assembly
MB992906
Engine hanger
attachment
Tool not available
MB991895
MB992906
SLIDE BRACKET (HI)
E
F
A
D
B
C
B991928
MB991928
Tool not available
Engine hanger
A: MB991929
A: Joint (50) 2
B: MB991930
B: Joint (90) 2
C: MB991931
C: Joint (140)
2
D: MB991932
D: Foot
(standard) 4
E: MB991933
E: Foot (short)
2
F: MB991934
F: Chain and
hook assembly
MQ600069
Bore scope
Tool not available
CVT belt inspection
MQ600069

ON-VEHICLE SERVICE
ESSENTIAL SERVICE
TRANSMISSION FLUID CHECK
04/28/2022
M1231211700719
CAUTION
Replace the transmission fluid whenever the transaxle is
replaced with a new one or the vehicle is driven in harsh
conditions.
1. Drive the vehicle until the transmission fluid is warmed up to
the normal operating temperature 50  80C (122  176F).
NOTE: Use scan tool (M.U.T.-III.) to measure the transmission
fluid
temperature.
Page 30
of 68
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CVT

ON-VEHICLE SERVICE
CVT BELT INSPECTION
M12312298A0011
Required Special Tools:
 MQ600069: Bore scope
JUDGMENT CRITERIA
Use special tool bore scope (MQ600069), confirm
thatthe lateral side of the belt element illustrated in
thefigure is not damaged.
Pulley
Belt element
Lateral side
of the belt
element
Belt ring
MQ600069
Belt element
BCI02135AA

The CVT belt is good if the lateral side of the belt
element is not damaged, and the lines are regular.
Lateral side
of the belt
element
Belt ring
BCKA0511AA

The CVT belt is bad if the lateral side of the belt
element is damaged, and the lines are worn out.
Lateral side
of the belt
element
Belt ring
BCKA0513AA
04/28/2022
Page 31 of 68
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CVT

ON-VEHICLE SERVICE
Advance Preparations
1. Bring the selector lever to "N".
2. Tie the front tire (RH) with a rope, etc. so that the tire does
not move.
BCI02299AA
Side view mirror
Markings
MQ600069
Approx. 10 cm
(3.9 in)
Approx. 19 cm (7.5 in)
Approx. 22 cm (8.7 in)
BCKA0765AA
Air gun
3. Install the side view mirror that is included with the special
tool bore scope (MQ600069) on to the bore scope and
make 3 markings as indicated in the figure.
NOTE: .
 A general commercial fiberscope available on the market
may be used as well. (Outer diameter of the tip
approximately φ5.5 mm (0.2 inch), focal length
approximately 10 mm (0.4 inch), pixel count
approximately 450,000 pixels, side view mirror required)
 Wash the side view mirror using Mitsubishi Motors Genuine parts cleaner (MZ100387) or an equivalent product
and air blow it to enhance visibility.
4. Wrap plastic tape around the tip of the air gun approximately
5 times. NOTE: The plastic tape is not required if a tapered
rubber attachment is used.
5. Make a marking on the lateral side of the front tire (LH).
Plastic tape
BCKA0766AA
04/28/2022
Page 32 of 68
(5207)
CVT

ON-VEHICLE SERVICE
Inspection Procedure
CAUTION
MQ600069
insertion location
CVT belt
Front portion of
the vehicle
Left side of
the vehicle
Make sure no foreign material (trash, debris, etc.)
enters the transaxle assembly, as this could cause
malfunction.
1. Remove the valve body assembly. While removing the oil
pan, if there are bearing fragments, solid metal pieces, etc.
on the oil pan, replace the transaxle assembly without
inspecting the CVT belt.
2. Let the side view mirror of the special tool bore scope
(MQ600069) face the left side of the vehicle, and insert the
scope from the location illustrated in the figure all the way
until the end of the transmission case and the marking
{approximately 19 cm (7.5 inches)} coincide.
Marking
Approx. 19 cm
(7.5 in)
MQ600069
Transaxle case
BCKA0769AA
Image (Reference)
Right side of
the vehicle
3. Slightly adjust the position of the side view mirror of the
special tool bore scope (MQ600069) so that the lateral
side of the belt element (right side of the vehicle) is
reflected in it.
CVT belt
MQ600069
BCKA4149AA
4. Insert the tip of the air gun at the location illustrated in the
figure and press it firmly.
CAUTION
MQ600069
Air gun insertion location
04/28/2022
BCKA0770AA
 Do not apply more than 1 MPa (145 psi) of air pressure
so as not to cause any damage.
 If air pressure is applied at once without firmly pressing
the tip of the air gun, the CVT fluid is likely to gush out.
Hence wear protective glasses and be careful while
performing the task.
5. Slowly continue applying air pressure using the air gun to
engage the clutch.
NOTE: When the front tire (LH) is rotated in the forward
direction (rolling direction), as the CVT belt rotates, the
clutch gets engaged.
Page 33 of 68
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CVT

ON-VEHICLE SERVICE
CAUTION
Side view mirror
If the tire is rotated in the reverse direction (backward
direction), the tip of the special tool bore scope
(MQ600069) could get caught between the belt and the
pulley. Hence rotate the tire in the forward direction.
6. Slowly move the front tire (LH) to make 1 rotation while
referring to the markings made on the tire during advance
preparations and check the entire perimeter of the CVT belt
based on the judgment criteria.
NOTE: If the belt does not move, make sure the air gun is
firmly pressed.
7. If the lateral side of the belt element (right side of the
vehicle) is damaged, replace the transaxle assembly. If it is
not damaged, proceed to the next step and inspect the
other lateral side of the belt element (left side of the vehicle).
8. Use special tool bore scope (MQ600069) at the marked
location {approximately 10 cm (3.9 inches)} as
illustrated in the figure.
MQ600069
Marking
approx. 10 cm
(3.9 in)
15°
BCKA0772AA
MQ600069 insertion
location
CVT belt
Front portion of
the vehicle
9. Let the side view mirror of the special tool bore scope
(MQ600069) face the right side of the vehicle, and insert the
scope from the location illustrated in the figure all the way
until the end of the transmission case and the marking
{approximately 22 cm (8.7 inches)} coincide.
Right side of
the vehicle
Marking
Approx. 22 cm
(8.7 in)
MQ600069
Transaxle case
04/28/2022
BCKA0767AA
Page 34 of 68
(5207)
CVT

ON-VEHICLE SERVICE
Image (Reference)
Left side of
the vehicle
10.Slightly adjust the position of the side view mirror of the
special tool bore scope (MQ600069) so that the lateral
side of the belt element (left side of the vehicle) is
reflected in it.
MQ600069
CVT belt
BCKA4148AA
11.Insert the tip of the air gun at the location illustrated in the
figure and press it firmly.
CAUTION
MQ600069
Air gun insertion location
BCKA0771AA
 Do not apply more than 1 MPa (145 psi) of air pressure
so as not to cause any damage.
 If air pressure is applied at once without firmly pressing
the tip of the air gun, the CVT fluid is likely to gush out.
Hence wear protective glasses and be careful while
performing the task.
12.Slowly continue applying air pressure using the air gun to
engage the clutch.
NOTE: When the front tire (LH) is rotated in the forward
direction (rolling direction), as the CVT belt rotates, the
clutch gets engaged.
CAUTION
If the tire is rotated in the reverse direction (backward
direction), the tip of the special tool bore scope
(MQ600069) could get caught between the belt and the
pulley. Hence rotate the tire in the forward direction.
13.Slowly move the front tire (LH) to make 1 rotation while
referring to the markings made on the tire during advance
preparations and check the entire perimeter of the CVT belt
based on the judgment criteria.
NOTE: If the belt does not move, make sure the air gun is
firmly pressed.
14.If the lateral side of the belt element (left side of the vehicle)
is damaged, replace the transaxle assembly. If it is not
damaged, proceed to the next step.
15.After the inspection, if some of the adhesive of the plastic
tape still remains on the location where the air gun is
inserted, remove it with Mitsubishi Motors Genuine parts
cleaner (MZ100387) or an equivalent product.
16.Install the valve body assembly.
NOTE: Replace the valve body assembly if the CVT belt
is inspected in the process of troubleshooting (No.
P0746, P0796, P0841, P2857, P2858, P2859, P285A).
04/28/2022
Page 35 of 68
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CVT
LUBRICANTS
LUBRICANTS
Item
Brand name
M1231200400866
Capacity dm3 (qt)
Transmission fluid
MITSUBISHI MOTORS GENUINE CVTF-J4 or
CVTF-J4+
Parts
cleaner (MITSUBISHI MOTORS GENUINE
Cleaning the transmission case
Part No. MZ100387) or equivalent
when CVT belt is inspected
7.0 (7.4)
As required

04/28/2022
Page 36 of 68
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CVT
DIAGNOSIS
23A-53
STEP 2. Measure the output wave pattern of the lockup
solenoid valve at TCM connector (LULS terminal).
(1) Connect the CVT assembly connector.
(2) Connect an oscilloscope between TCM connector LULS
terminal and body ground (Refer to P.23A-160).
(3) Driving conditions.
(4) During the lockup control.
(5) Use an oscilloscope, measure the voltage between TCM
connector LULS terminal and body ground.
OK: A wave pattern such as the one shown on
P.23A-160(Check Procedure Using an Oscilloscope) should be output, and the maximum value
should be 11 volts or more and the minimum value
should be 1 volt or less. There should be no noise
in the output wave pattern.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to DTC P2763: Malfunction of the lockup
solenoid valve (open circuit/ short to power supply)
P.23A-114, or DTC P2764: Malfunction of the lockup
solenoid valve (short to ground) P.23A-117.
STEP 3. Using scan tool (M.U.T.-III), recheck the DTC.
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Q: Is DTC P0741 stored?
YES : Replace the transaxle assembly (Refer to
P.23A-183).
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunctions P.00-15).
DTC P0746: Abnormality in Hydraulic Control System Function
DIAGNOSTIC FUNCTION
MONITOR EXECUTION
If the pulley ratio, which is calculated according to
the primary pulley speed and the secondary pulley
speed, exceeds the standard value, the TCM determines that the line pressure is abnormal.
•
•
•
•
Transmission range: "D", "R" or "L"
Primary speed: 500 r/min or more
Acceleration: -0.05 G or more
Engine speed: 450 r/min or more
DESCRIPTIONS OF MONITOR METHODS
The ratio between the primary pulley speed and the
secondary pulley speed is 2.55 or more for 0.2 second, or 3.35 or more for 0.1 second.
04/28/2022
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CVT
23A-54
DIAGNOSIS
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P0705: Malfunction of transmission range switch
• P0715: Malfunction of primary pulley speed sensor
• P0720: Abnormality in output speed sensor
• P0791: Malfunction of the secondary pulley
speed sensor
• U0001: Malfunction of CAN communication
• U0100: CAN time-out error (Engine)
Sensor (The sensor below is determined to be
normal)
• Transmission range switch
• Primary pulley speed sensor
• Output speed sensor
• Secondary pulley speed sensor
LOGIC FLOW CHARTS (Monitor Sequence)
START
All secondary parameters
are in the enable condition.
No
Yes
No
Pulley ratio > 3.35
Yes
No
Continuous failure
for 0.1 sec
Yes
Pulley ratio > 2.55
No
Yes
No
Continuous failure
for 0.2 sec
Yes
Good
Malfunction
END
ACC07017 AC
04/28/2022
Page 38 of 68
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CVT
23A-55
DIAGNOSIS
DTC SET CONDITIONS
Check Conditions
• Transmission range switch position: "D", "R" or
"L"
• Engine speed: 450 r/min or more
• Primary pulley speed: 500 r/min or more
• Acceleration: -0.05 G or more
Judgment Criteria
• Pulley ratio (primary pulley speed/secondary pulley speed) more than 2.55 for 0.2 second.
• Pulley ratio (primary pulley speed/secondary pulley speed) more than 3.35 for 0.1 second.
OBD-II DRIVE CYCLE PATTERN
Accelerate to approximately 10 km/h (6.2 mph)
slowly. Then drive at a constant speed for 10 seconds.
PROBABLE CAUSES

Malfunction of the transaxle assembly (Faulty line
pressure solenoid valve or valve body assembly)
DIAGNOSIS
Required Special Tools:
• MB992744: Vehicle communication interface-Lite
(V.C.I.-Lite)
• MB992745: V.C.I.-Lite main harness A
• MB992747: V.C.I.-Lite USB cable short
• MB992748: V.C.I.-Lite USB cable long
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicles Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Check the following connector.
• CVT assembly connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the faulty connector.
 • Malfunction of the valve body assembly
(Faulty line pressure solenoid valve)
• Malfunction of the transaxle assembly
04/28/2022
Page 39 of 68
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CVT
23A-56
DIAGNOSIS
STEP 2. Measure the output wave pattern of the line
pressure solenoid valve at TCM connector (PLLS
terminal).
(1) Connect the CVT assembly connector.
(2) Connect an oscilloscope between TCM connector PLLS
terminal and body ground (Refer to P.23A-160).
(3) Transmission range: "P" range
(4) Engine: Idling
(5) Use an oscilloscope, measure the voltage between TCM

connector PLLS terminal and body ground.
STEP 4. CVT belt inspection.
OK: A wave pattern such as the one shown on
P.23A-160(Check Procedure Using an OscilloCheck the appearance of the CVT belt.
(Refer to On-vehicle Service – CVT Belt Inspection)
scope) should be output, and the maximum value
should be 11 volts or more and the minimum value
Q: Is the CVT belt normal?
should be 1 volt or less. There should be no noise
YES : Replace the valve body assembly.
in the output wave pattern.
NO : Replace the transaxle assembly.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to DTC P0962: Malfunction of the line pressure
solenoid valve (short to ground) P.23A-79, or DTC
P0963: Malfunction of the line pressure solenoid
valve (open circuit/ short to power supply) P.23A-82.
STEP 3. Using scan tool (M.U.T.-III), recheck the DTC.
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Q: Is DTC P0746 stored?

 YES : Replace the transaxle assembly (Refer to
Go to Step 4.
P.23A-183).
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunctions P.00-15).
DTC P0791: Malfunction of Secondary Pulley Speed Sensor
DIAGNOSTIC FUNCTION
DESCRIPTIONS OF MONITOR METHODS
The TCM determines whether the system is faulty by
monitoring the secondary pulley speed sensor.
04/28/2022
• The status with the primary pulley speed of 1,000
r/min or more and with the secondary pulley
speed of 150 r/min or less continues for five seconds.
• When the secondary pulley speed has dropped
abruptly from 1,000 r/min or more to 240 r/min or
less, and then it keeps 240 r/min or less for 0.5
second continuously.
Page 40 of 68
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CVT
DIAGNOSIS
23A-61
DTC P0796: Abnormality in Primary Pressure Solenoid Valve Function
DIAGNOSTIC FUNCTION
If the actual pulley ratio does not track with the target
ratio, the TCM determines whether the system is
faulty.
DESCRIPTIONS OF MONITOR METHODS
If the actual pulley ratio remains 2.0 to 2.55 for five
seconds when the target pulley ratio is 1.2 or less, or
if the actual pulley ratio remains 0.2 to 0.75 for five
seconds when the target pulley ratio is 1.55 or more,
the TCM determines that a malfunction exists.
MONITOR EXECUTION
•
•
•
•
Transmission range: "D", "R" or "L"
Engine speed: 450 r/min or more
Primary pulley speed: 306 r/min or more
Secondary pulley speed: 230 r/min or more
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P0705: Malfunction of transmission range switch
• P0715: Malfunction of primary pulley speed sensor
• P0746: Abnormality in hydraulic control system
• P0791: Malfunction of the secondary pulley
speed sensor
• P0842, P0843: Malfunction of the secondary
pressure sensor
• P0962, P0963: Malfunction of the line pressure
solenoid valve
• P0970, P0971: Malfunction of the primary pressure solenoid valve
• U0001: Malfunction of CAN communication (Bus
off)
• U0100: CAN time-out error (Engine)
Sensor (The sensor below is determined to be
normal)
• Transmission range switch
• Primary pulley speed sensor
• Secondary pulley speed sensor
• Secondary pressure sensor
• Line pressure solenoid valve
• Primary pressure solenoid valve
04/28/2022
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CVT
23A-62
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence-Output Functional Low)
START
No
All secondary parameters
are in the enable condition.
Yes
Pulley ratio >= 2.0
and
Pulley ratio <= 2.55
No
Yes
No
Continuous failure
for 5 sec
Yes
Malfunction
Good
END
ACC07021 AB
04/28/2022
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CVT
23A-63
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence-Output Functional High)
START
No
All secondary parameters
are in the enable condition.
Yes
Pulley ratio <= 0.75
No
Yes
No
Continuous failure
for 5 sec
Yes
Malfunction
Good
END
ACC07020 AB
DTC SET CONDITIONS
OBD-II DRIVE CYCLE PATTERN
Accelerate to approximately 10 km/h (6.2 mph)
Check Conditions
slowly. Then drive at a constant speed for 10 sec• Transmission range switch position: "D", "R" or
onds.
"L"
• Engine speed: 450 r/min or more
PROBABLE CAUSES
• Primary pulley speed: 306 r/min or more
Malfunction of the transaxle assembly (Faulty pri• Secondary pulley speed: 230 r/min or more 
mary pressure solenoid valve or valve body assemJudgment Criteria
bly)
• When the target pulley ratio (primary pulley
speed/secondary pulley speed) is less than 1.2

while the vehicle is being driven, the actual pulley
• Malfunction of the valve body assembly
ratio remains from 2.0 to 2.55 for five seconds.
(Faulty line pressure solenoid valve)
• When the target pulley ratio (primary pulley
• Malfunction of the transaxle assembly
speed/secondary pulley speed) is more than 1.55
while the vehicle is being driven, the actual pulley
ratio remains from 0.75 or less for five seconds.
04/28/2022
Page 43 of 68
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23A-64
CVT
DIAGNOSIS
DIAGNOSIS
Required Special Tools:
• MB992744: Vehicle communication interface-Lite
(V.C.I.-Lite)
• MB992745: V.C.I.-Lite main harness A
• MB992747: V.C.I.-Lite USB cable short
• MB992748: V.C.I.-Lite USB cable long
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicles Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Check the following connector.
• CVT assembly connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the faulty connector.
STEP 2. Measure the output wave pattern of the primary
pressure solenoid valve at TCM connector (PRLS
terminal).
(1) Connect the CVT assembly connector.
(2) Connect an oscilloscope between TCM connector PRLS
terminal and body ground (Refer to P.23A-160).
(3) Transmission range: "P" range
(4) Engine: Idling
(5) Use an oscilloscope, measure the voltage between TCM
connector PRLS terminal and body ground.
OK: A wave pattern such as the one shown on
P.23A-160(Check Procedure Using an Oscilloscope) should be output, and the maximum value
should be 11 volts or more and the minimum value
should be 1 volt or less. There should be no noise
in the output wave pattern.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to DTC P0970: Malfunction of the primary
pressure solenoid valve (short to ground) P.23A-85,
or DTC P0971: Malfunction of the primary pressure
solenoid valve (open circuit/ short to power supply)
P.23A-88.
04/28/2022
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CVT
DIAGNOSIS
23A-65
STEP 3. Using scan tool (M.U.T.-III), recheck the DTC.
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Q: Is DTC P0796 stored?


YES : Replace the transaxle assembly (Refer to
Go to Step 4.
P.23A-183).
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunctions P.00-15).
 STEP 4. CVT belt inspection.
Check the appearance of the CVT belt.
(Refer to On-vehicle Service – CVT Belt Inspection)
Q: Is the CVT belt normal?
YES : Replace the valve body assembly.
NO : Replace the transaxle assembly.
Code P0841: Abnormality in Secondary Pressure Sensor Function
DIAGNOSTIC FUNCTION
TCM determines that the system is defective by
monitoring the secondary pressure sensor.
DESCRIPTIONS OF MONITOR METHODS
The difference between the actual and target secondary pressures remains more than 0.675 MPa
(97.9 psi) for five seconds while the vehicle is driven
at constant speed.
MONITOR EXECUTION
Transmission range: "D"
Primary pulley speed: 306 r/min or more
Secondary pulley speed: 230 r/min or more
Actual pulley ratio change rate: 0.1 or less per
second
• Vehicle speed change rate: 50 km/h (31 mph) or
less per five seconds
• Accelerator pedal position change rate: 21 percents or less per five seconds
•
•
•
•
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P0705: Malfunction of transmission range switch
04/28/2022
• P0715: Malfunction of primary pulley speed sensor
• P0720: Malfunction of output speed sensor
• P0746: Abnormality in hydraulic control system
function
• P0791: Malfunction of secondary pulley speed
sensor
• P0842: Malfunction of the secondary pressure
sensor (low voltage)
• P0843: Malfunction of the secondary pressure
sensor (high voltage)
• P0962: Malfunction of the line pressure solenoid
valve (short to ground)
• P0963: Malfunction of the line pressure solenoid
valve (open circuit/ short to power supply)
• P1607: Malfunction of the system power supply
(low voltage)
• U0100: CAN time-out error (Engine)
Sensor (The sensor below is determined to be
normal)
• Transmission range switch
• Primary pulley speed sensor
• Secondary pulley speed sensor
• Output speed sensor
• Line pressure solenoid valve
Page 45 of 68
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CVT
DIAGNOSIS
23A-65
STEP 3. Using scan tool (M.U.T.-III), recheck the DTC.
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Q: Is DTC P0796 stored?
YES : Replace the transaxle assembly (Refer to
P.23A-183).
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunctions P.00-15).
Code P0841: Abnormality in Secondary Pressure Sensor Function
DIAGNOSTIC FUNCTION
TCM determines that the system is defective by
monitoring the secondary pressure sensor.
DESCRIPTIONS OF MONITOR METHODS
The difference between the actual and target secondary pressures remains more than 0.675 MPa
(97.9 psi) for five seconds while the vehicle is driven
at constant speed.
MONITOR EXECUTION
Transmission range: "D"
Primary pulley speed: 306 r/min or more
Secondary pulley speed: 230 r/min or more
Actual pulley ratio change rate: 0.1 or less per
second
• Vehicle speed change rate: 50 km/h (31 mph) or
less per five seconds
• Accelerator pedal position change rate: 21 percents or less per five seconds
•
•
•
•
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P0705: Malfunction of transmission range switch
04/28/2022
• P0715: Malfunction of primary pulley speed sensor
• P0720: Malfunction of output speed sensor
• P0746: Abnormality in hydraulic control system
function
• P0791: Malfunction of secondary pulley speed
sensor
• P0842: Malfunction of the secondary pressure
sensor (low voltage)
• P0843: Malfunction of the secondary pressure
sensor (high voltage)
• P0962: Malfunction of the line pressure solenoid
valve (short to ground)
• P0963: Malfunction of the line pressure solenoid
valve (open circuit/ short to power supply)
• P1607: Malfunction of the system power supply
(low voltage)
• U0100: CAN time-out error (Engine)
Sensor (The sensor below is determined to be
normal)
• Transmission range switch
• Primary pulley speed sensor
• Secondary pulley speed sensor
• Output speed sensor
• Line pressure solenoid valve
Page 46 of 68
(5207)
CVT
23A-66
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
Actual secondary fluid pressure
- target secondary fluid pressure
> 0.675 MPa
No
Yes
No
Continuous failure
for 5 sec
Yes
Good
Malfunction
END
ACH01226
DTC SET CONDITIONS
Check Conditions
• Transmission range: "D"
• Primary pulley speed: 306 r/min or more
• Secondary pulley speed: 230 r/min or more
• Actual pulley ratio change rate: 0.1 or less per
second
• Vehicle speed change rate: 50 km/h (31 mph) or
less per five seconds
• Accelerator pedal position change rate: 21 percents or less per five seconds
• Voltage of battery: 10 volts or more
• Voltage of battery: 16.5 volts or less
04/28/2022
Judgment Criteria
• The difference between the actual and target secondary pressures remains more than 0.675 MPa
(97.9 psi) for five seconds.
Page 47 of 68
(5207)
CVT
DIAGNOSIS
OBD-II DRIVE CYCLE PATTERN
23A-67
 PROBABLE CAUSES
The vehicle is driven for at least 15 seconds without
depressing the accelerator pedal and brake pedal
while the selector lever is at "D" range.
Malfunction of the transaxle assembly (Faulty secondary pressure sensor or valve body assembly)
 • Malfunction of the valve body assembly
(Faulty secondary pressure sensor)
DIAGNOSIS • Malfunction of the transaxle assembly
Required Special Tools:
• MB992744: Vehicle communication interface-Lite
(V.C.I.-Lite)
• MB992745: V.C.I.-Lite main harness A
• MB992747: V.C.I.-Lite USB cable short
• MB992748: V.C.I.-Lite USB cable long
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicles Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Hydraulic pressure test.
Refer to P.23A-171.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the failure sections.
STEP 2. Check the following connector.
• TCM connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Repair the defective connector.
STEP 3. Voltage measurement at TCM connector (LPRS
terminal).
(1) Connect the TCM connector.
(2) Drive the vehicle until the engine is warmed up.
(3) Transmission range: "P"
(4) Engine: Idling
(5) Measure the TCM connector side by backprobing.
(6) Measure the voltage between the TCM connector (LPRS
terminal) and TCM connector (SGND terminal).
OK: approximately 0.84 volt
Q: Is the check result normal?
YES : Go to Step 4.
NO : Refer to DTC P0842: Malfunction of the secondary
pressure sensor (low voltage) P.23A-68, or DTC
P0843: Malfunction of the secondary pressure sensor
(high voltage) P.23A-71.
04/28/2022
Page 48 of 68
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CVT
23A-68
DIAGNOSIS
STEP 4. Using scan tool (M.U.T.-III), recheck the DTC.
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Q: Is DTC P0841 stored?


YES : Replace the transaxle assembly (Refer to
Go to Step 5.
P.23A-183).
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunctions P.00-15).

STEP 5. CVT belt inspection.
Check the appearance of the CVT belt.
(Refer to On-vehicle Service – CVT Belt Inspection)
Q: Is the CVT belt normal?
YES : Replace the valve body assembly.
NO : Replace the transaxle assembly.
DTC P0842: Malfunction of the Secondary Pressure Sensor (Low Voltage)
DIAGNOSTIC FUNCTION
MONITOR EXECUTION
The TCM determines that the system is defective
when the secondary pressure sensor output voltage
is lower than a predetermined value.
Transmission fluid temperature: -20°C (-4°F) or more
DESCRIPTIONS OF MONITOR METHODS
The status with the fluid temperature of -20°C (-4°F)
or more and with the secondary pressure sensor
voltage of 0.09 volt or less continues for five seconds.
04/28/2022
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• Not applicable
Sensor (The sensor below is determined to be
normal)
• Not applicable
Page 49 of 68
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CVT
23A-120
DIAGNOSIS
DTC P2857: Auxiliary Gearbox Gear 1 Incorrect Ratio Run-up
DIAGNOSTIC FUNCTION
The TCM determines that the system is faulty when
the auxiliary gearbox remains at incorrect ratio
although the TCM commands the 1st gear.
DESCRIPTIONS OF MONITOR METHODS
The gear ratio is 2.232 or more for two seconds while
the TCM is shifting the auxiliary gear to 1st gear.
MONITOR EXECUTION
• Accelerator pedal opening angle: 7.8 percent or
more
• Engine speed: 450 r/min or more
• Output shaft speed: 300 r/min or more
• Secondary pulley speed: 300 r/min or more
• Transmission range: "D" or "L"
• Target auxiliary gear position: 1st
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P0705: Malfunction of the transmission range
switch
04/28/2022
• P0720: Malfunction of the output speed sensor
• P0791: Malfunction of the secondary pulley
speed sensor
• P0973, P0974: Malfunction of the low brake solenoid valve
• P0976, P0977: Malfunction of the high clutch and
reverse brake solenoid valve
• P2858: Auxiliary gearbox gear 2 incorrect ratio
run-up
• P2859: Auxiliary gearbox gear 1 incorrect ratio
• P285A: Auxiliary gearbox gear 2 incorrect ratio
• U0001: Malfunction of CAN communication circuit (Bus off)
• U0100: CAN time-out error (Engine)
Sensor (The sensor below is determined to be
normal)
• Transmission range switch
• Secondary pulley speed sensor
• Output speed sensor
• Low brake solenoid valve
• High clutch and reverse brake solenoid valve
Page 50 of 68
(5207)
23A-121
CVT
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
No
Actual auxiliary gear ratio
> 2.232
Yes
No
Continuous failure
for 2 sec
Yes
Malfunction
Good
END
ACC07031
DTC SET CONDITIONS
Check Conditions
• Voltage of battery: 10 volts or more.
• Voltage of battery: 16.5 volts or less.
• Transmission range: "D" or "L"
• Accelerator pedal position sensor (main) output
voltage: 1.23 volts or more (Opening angle: 7.8
percent or more)
• Engine speed: 450 r/min or more
• Output speed: 300 r/min or more
• Secondary pulley speed: 300 r/min or more

• Target auxiliary gear position: 1st
Judgment Criteria
• While the vehicle is being driven, the actual gear
ratio of the auxiliary gearbox remains more than
2.232 for two seconds although the TCM commands the 1st gear.
OBD-II DRIVE CYCLE PATTERN
Accelerate to 40 km/h (24.9 mph) slowly with the
accelerator opening angle at 10 percent or more.
PROBABLE CAUSES
Malfunction of the transaxle assembly (Faulty low
brake solenoid valve or valve body assembly)
 • Malfunction of the valve body assembly
04/28/2022
Page 51 of 68
(Faulty low brake solenoid valve)
• Malfunction of the transaxle assembly
(5207)
23A-122
CVT
DIAGNOSIS
DIAGNOSIS
Required Special Tools:
• MB992744: Vehicle communication interface-Lite
(V.C.I.-Lite)
• MB992745: V.C.I.-Lite main harness A
• MB992747: V.C.I.-Lite USB cable short
• MB992748: V.C.I.-Lite USB cable long
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicles Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Check the following connector.
• CVT assembly connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the faulty connector.
STEP 2. Measure the output wave pattern of the low brake
solenoid valve at TCM connector (LBLS terminal).
(1) Connect the CVT assembly connector.
(2) Connect an oscilloscope between TCM connector LBLS
terminal and body ground (Refer to P.23A-160).
(3) Transmission range: "D" range
(4) Drive at a constant speed of approximately 20 km/h (12.4
mph) (auxiliary gearbox: at 1st gear).
(5) Use an oscilloscope, measure the voltage between TCM
connector LBLS terminal and body ground.
OK: A wave pattern such as the one shown on
P.23A-160(Check Procedure Using an Oscilloscope) should be output, and the maximum value
should be 11 volts or more and the minimum value
should be 1 volt or less. There should be no noise
in the output wave pattern.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to DTC P0973: Malfunction of the low brake
solenoid valve (short to ground) P.23A-91, or DTC
P0974: Malfunction of the low brake solenoid valve
(open circuit/short to power supply) P.23A-94.
04/28/2022
Page 52 of 68
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CVT
DIAGNOSIS
23A-123
STEP 3. Using scan tool (M.U.T.-III), recheck the DTC
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Q: Is DTC P2857 stored?


YES : Replace the transaxle assembly (Refer to
Go to Step 4.
P.23A-183).
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunctions P.00-15).

STEP 4. CVT belt inspection.
Check the appearance of the CVT belt.
(Refer to On-vehicle Service – CVT Belt Inspection)
Q: Is the CVT belt normal?
YES : Replace the valve body assembly.
NO : Replace the transaxle assembly.
DTC P2858: Auxiliary Gearbox Gear 2 Incorrect Ratio Run-up
DIAGNOSTIC FUNCTION
The TCM determines that the system is faulty when
the auxiliary gearbox remains at incorrect ratio
although the TCM commands the 2nd gear.
DESCRIPTIONS OF MONITOR METHODS
The gear ratio is 2.232 or more for at least two seconds while the TCM is shifting the auxiliary gear to
2nd gear.
MONITOR EXECUTION
• Accelerator pedal opening angle: 7.8 percent or
more
• Engine speed: 450 r/min or more
• Output shaft speed: 300 r/min or more
• Secondary pulley speed: 300 r/min or more
• Transmission range: "D" or "L"
• Target auxiliary gear position: 2nd
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P0705: Malfunction of the transmission range
switch
• P0720: Malfunction of the output speed sensor
• P0791: Malfunction of the secondary pulley
speed sensor
• P0973, P0974: Malfunction of the low brake solenoid valve
• P0976, P0977: Malfunction of the high clutch and
reverse brake solenoid valve
• P2857: Auxiliary gearbox gear 1 incorrect ratio
run-up
• P2859: Auxiliary gearbox gear 1 incorrect ratio
• P285A: Auxiliary gearbox gear 2 incorrect ratio
• U0001: Malfunction of CAN communication circuit (Bus off)
• U0100: CAN time-out error (Engine)
Sensor (The sensor below is determined to be
normal)
• Transmission range switch
• Secondary pulley speed sensor
• Output speed sensor
• Low brake solenoid valve
• High clutch and reverse brake solenoid valve
04/28/2022
Page 53 of 68
(5207)
CVT
DIAGNOSIS
23A-123
STEP 3. Using scan tool (M.U.T.-III), recheck the DTC
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Q: Is DTC P2857 stored?
YES : Replace the transaxle assembly (Refer to
P.23A-183).
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunctions P.00-15).
DTC P2858: Auxiliary Gearbox Gear 2 Incorrect Ratio Run-up
DIAGNOSTIC FUNCTION
The TCM determines that the system is faulty when
the auxiliary gearbox remains at incorrect ratio
although the TCM commands the 2nd gear.
DESCRIPTIONS OF MONITOR METHODS
The gear ratio is 2.232 or more for at least two seconds while the TCM is shifting the auxiliary gear to
2nd gear.
MONITOR EXECUTION
• Accelerator pedal opening angle: 7.8 percent or
more
• Engine speed: 450 r/min or more
• Output shaft speed: 300 r/min or more
• Secondary pulley speed: 300 r/min or more
• Transmission range: "D" or "L"
• Target auxiliary gear position: 2nd
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P0705: Malfunction of the transmission range
switch
• P0720: Malfunction of the output speed sensor
• P0791: Malfunction of the secondary pulley
speed sensor
• P0973, P0974: Malfunction of the low brake solenoid valve
• P0976, P0977: Malfunction of the high clutch and
reverse brake solenoid valve
• P2857: Auxiliary gearbox gear 1 incorrect ratio
run-up
• P2859: Auxiliary gearbox gear 1 incorrect ratio
• P285A: Auxiliary gearbox gear 2 incorrect ratio
• U0001: Malfunction of CAN communication circuit (Bus off)
• U0100: CAN time-out error (Engine)
Sensor (The sensor below is determined to be
normal)
• Transmission range switch
• Secondary pulley speed sensor
• Output speed sensor
• Low brake solenoid valve
• High clutch and reverse brake solenoid valve
04/28/2022
Page 54 of 68
(5207)
CVT
23A-124
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
No
Actual auxiliary gear ratio
> 2.232
Yes
No
Continuous failure
for 2 sec
Yes
Malfunction
Good

END
DTC SET CONDITIONS
Check Conditions
• Voltage of battery: 10 volts or more
• Voltage of battery: 16.5 volts or less
• Transmission range: "D" or "L"
• Accelerator pedal position sensor (main) output
voltage: 1.23 volts or more (Opening angle: 7.8
percent or more)
• Engine speed: 450 r/min or more
• Output speed: 300 r/min or more
• Secondary pulley speed: 300 r/min or more
• Target auxiliary gear position: 2nd
• Malfunction of the valve body assembly
ACC07035
(Faulty high clutch and reverse
brake solenoid valve)
• Malfunction of the transaxle assembly
Judgment Criteria
• While the vehicle is being driven, the actual gear
ratio of the auxiliary gearbox remains more than
2.232 for two seconds although the TCM commands the 2nd gear.
OBD-II DRIVE CYCLE PATTERN
Drive at 40 km/h (24.9 mph) for at least five seconds
with the accelerator opening angle at 10 percent or
more.
PROBABLE CAUSES
Malfunction of the transaxle assembly (Faulty high
 clutch and reverse brake solenoid valve or valve
body assembly)
04/28/2022
Page 55 of 68
(5207)
CVT
DIAGNOSIS
23A-125
DIAGNOSIS
Required Special Tools:
• MB992744: Vehicle communication interface-Lite
(V.C.I.-Lite)
• MB992745: V.C.I.-Lite main harness A
• MB992747: V.C.I.-Lite USB cable short
• MB992748: V.C.I.-Lite USB cable long
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicles Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Check the following connector.
• CVT assembly connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the faulty connector.
STEP 2. Measure the output wave pattern of the high
clutch and reverse brake solenoid valve at TCM connector
(HRLS terminal).
(1) Connect the CVT assembly connector.
(2) Connect an oscilloscope between TCM connector HRLS
terminal and body ground (Refer to P.23A-160).
(3) Transmission range: "D" range
(4) Drive at a constant speed of approximately 20 km/h (12.4
mph) (auxiliary gearbox: at 2nd gear).
(5) Use an oscilloscope, measure the voltage between TCM
connector HRLS terminal and body ground.
OK: A wave pattern such as the one shown on
P.23A-160(Check Procedure Using an Oscilloscope) should be output, and the maximum value
should be 11 volts or more and the minimum value
should be 1 volt or less. There should be no noise
in the output wave pattern.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to DTC P0976: Malfunction of the high clutch
and reverse brake solenoid valve (short to ground)
P.23A-97, or DTC P0977: Malfunction of the high
clutch and reverse brake solenoid valve (open
circuit/short to power supply) P.23A-100.
04/28/2022
Page 56 of 68
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CVT
23A-126
DIAGNOSIS
STEP 3. Using scan tool (M.U.T.-III), recheck the DTC.
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Q: Is DTC P2858 stored?


YES : Replace the transaxle assembly (Refer to
Go to Step 4.
P.23A-183).
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
 Cope with Intermittent Malfunctions P.00-15).
STEP 4. CVT belt inspection.
Check the appearance of the CVT belt.
(Refer to On-vehicle Service – CVT Belt Inspection)
Q: Is the CVT belt normal?
YES : Replace the valve body assembly.
NO : Replace the transaxle assembly.
DTC P2859: Auxiliary Gearbox Gear 1 Incorrect Ratio
DIAGNOSTIC FUNCTION
The TCM determines that the system is faulty when
the auxiliary gearbox remains the gear ratio is abnormal although the TCM commands the 1st gear.
DESCRIPTIONS OF MONITOR METHODS
• The system determines that a fault has occurred
when the gear ratio is within ± 10 percent of the
2nd gear ratio (0.900 - 1.100) for at least 0.5 second while the TCM is shifting the auxiliary gear to
1st gear.
• The system determines that a fault has occurred
when the gear ratio is 0.911 or less, or 2.732 or
more for at least 0.2 second while the TCM is
shifting the auxiliary gear to 1st gear.
• If the high clutch pressure switch remains on for
at least 1.5 seconds while the TCM is shifting the
auxiliary gear to 1st gear, the system determines
that a fault has occurred.
MONITOR EXECUTION
• Output shaft speed: 300 r/min or more 
• Secondary pulley speed: 300 r/min or more

• Transmission range: "D" or "L"
• Acceleration: - 0.05 G or less 
• Target auxiliary gear position: 1st
• The target pressure for the high clutch and
reverse brake solenoid valve is 0 MPa (0 psi) or
less .
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P0705: Malfunction of the transmission range
switch
• P0715: Malfunction of primary pulley speed sensor
• P0720: Malfunction of the output speed sensor
• P0791: Malfunction of the secondary pulley
speed sensor
• P0876: Malfunction of the high clutch pressure
switch
• P0973, P0974: Malfunction of the low brake solenoid valve
• Accelerator pedal opening angle: 7.8 percent or
more 
• Vehicle speed: 10 km/h (6 mph) or more 
• Vehicle speed: 10 km/h (6 mph) or less 
• Engine
speed: 450 r/min or more
04/28/2022
Page 57 of 68
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CVT
23A-126
DIAGNOSIS
STEP 3. Using scan tool (M.U.T.-III), recheck the DTC.
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Q: Is DTC P2858 stored?
YES : Replace the transaxle assembly (Refer to
P.23A-183).
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunctions P.00-15).
DTC P2859: Auxiliary Gearbox Gear 1 Incorrect Ratio
DIAGNOSTIC FUNCTION
The TCM determines that the system is faulty when
the auxiliary gearbox remains the gear ratio is abnormal although the TCM commands the 1st gear.
DESCRIPTIONS OF MONITOR METHODS
• The system determines that a fault has occurred
when the gear ratio is within ± 10 percent of the
2nd gear ratio (0.900 - 1.100) for at least 0.5 second while the TCM is shifting the auxiliary gear to
1st gear.
• The system determines that a fault has occurred
when the gear ratio is 0.911 or less, or 2.732 or
more for at least 0.2 second while the TCM is
shifting the auxiliary gear to 1st gear.
• If the high clutch pressure switch remains on for
at least 1.5 seconds while the TCM is shifting the
auxiliary gear to 1st gear, the system determines
that a fault has occurred.
MONITOR EXECUTION
• Accelerator pedal opening angle: 7.8 percent or
more 
• Vehicle speed: 10 km/h (6 mph) or more 
• Vehicle speed: 10 km/h (6 mph) or less 
• Engine speed: 450 r/min or more
04/28/2022
• Output shaft speed: 300 r/min or more 
• Secondary pulley speed: 300 r/min or more

• Transmission range: "D" or "L"
• Acceleration: - 0.05 G or less 
• Target auxiliary gear position: 1st
• The target pressure for the high clutch and
reverse brake solenoid valve is 0 MPa (0 psi) or
less .
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P0705: Malfunction of the transmission range
switch
• P0715: Malfunction of primary pulley speed sensor
• P0720: Malfunction of the output speed sensor
• P0791: Malfunction of the secondary pulley
speed sensor
• P0876: Malfunction of the high clutch pressure
switch
• P0973, P0974: Malfunction of the low brake solenoid valve
Page 58 of 68
(5207)
23A-127
CVT
DIAGNOSIS
• P0976, P0977: Malfunction of the high clutch and
reverse brake solenoid valve
• P2857: Auxiliary gearbox gear 1 incorrect ratio
run-up
• P2858: Auxiliary gearbox gear 2 incorrect ratio
run-up
• P285A: Auxiliary gearbox gear 2 incorrect ratio
• U0001: Malfunction of CAN communication circuit (Bus off)
• U0100: CAN time-out error (Engine)
Sensor (The sensor below is determined to be
normal)
• Transmission range switch
• Primary pulley speed sensor
• Output speed sensor
• Secondary pulley speed sensor
• Low brake solenoid valve
• High clutch and reverse brake solenoid valve
• High clutch oil pressure switch
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
Actual auxiliary gear ratio
= 2nd
No
Yes
No
Continuous failure
for 0.5 sec
Yes
Malfunction
Good
END
ACC07032
04/28/2022
Page 59 of 68
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CVT
23A-128
DIAGNOSIS
DTC SET CONDITIONS
Check Conditions
• Target auxiliary gear position: 1st
• Voltage of battery: 10 volts or more.
• Voltage of battery: 16.5 volts or less.
• Transmission range: "D" or "L"
• Accelerator pedal position sensor (main) output
voltage: 1.23 volts or more (Opening angle: 7.8
percent or more)
• Engine speed: 450 r/min or more
• Output speed: 300 r/min or more
• Secondary pulley speed: 300 r/min or more
Judgment Criteria
• The actual gear ratio of the auxiliary gearbox
deviates by ± 10 percent or less from the 2nd
gear ratio (0.900 - 1.100) for 0.5 second.
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
Yes
Actual auxiliary gear ratio
>= 2.732
No
Yes
Actual auxiliary gear ratio
<= 0.911
No
No
Continuous failure
for 0.2 sec
Yes
Malfunction
Good
END
ACC07033
04/28/2022
Page 60 of 68
(5207)
23A-129
CVT
DIAGNOSIS
• Output speed: 300 r/min or more
• Secondary pulley speed: 300 r/min or more
• Acceleration: -0.05 G or less
DTC SET CONDITIONS
Check Conditions
• Target auxiliary gear position: 1st
• Voltage of battery: 10 volts or more.
• Voltage of battery: 16.5 volts or less.
• Transmission range: "D" or "L"
• Vehicle speed: 10 km/h (6 mph) or more
• Engine speed: 450 r/min or more
Judgment Criteria
• The actual gear ratio of the auxiliary gearbox
deviates by ± 50 percent or more from the 1st
gear ratio (0.911 or less, 2.732 or more) for 0.2
second.
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
High clutch oil pressure
switch status is "ON"
No
Yes
No
Continuous for 1.5 sec
Yes
Malfunction
Good
END
ACC07034 AB
DTC SET CONDITIONS
Check Conditions
• Target auxiliary gear position: 1st
• The target pressure for the high clutch and
reverse brake solenoid valve is 0 MPa (0 psi) or
less.
04/28/2022
• Transmission range: "D" or "L"
• Vehicle speed: 10 km/h (6 mph) or less
• Engine speed: 450 r/min or more
Judgment Criteria
• The high clutch oil pressure switch is ON for 1.5
seconds.
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CVT
23A-130
OBD-II DRIVE CYCLE PATTERN
DIAGNOSIS
 PROBABLE CAUSES
Accelerate to 50 km/h (31.1 mph) slowly and then
stop the vehicle for at least five seconds with the
accelerator opening angle at 10 percent or more.
Malfunction of the transaxle assembly (Faulty high
clutch and reverse brake solenoid valve or valve
body assembly)

• Malfunction of the valve body assembly
DIAGNOSIS (Faulty high clutch and reverse brake solenoid valve)
• Malfunction of the transaxle assembly
Required Special Tools:
• MB992744: Vehicle communication interface-Lite
(V.C.I.-Lite)
• MB992745: V.C.I.-Lite main harness A
• MB992747: V.C.I.-Lite USB cable short
• MB992748: V.C.I.-Lite USB cable long
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicles Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Check the following connector.
• CVT assembly connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the faulty connector.
04/28/2022
STEP 2. Measure the output wave pattern of the high
clutch and reverse brake solenoid valve at TCM connector
(HRLS terminal).
(1) Connect the CVT assembly connector.
(2) Connect an oscilloscope between TCM connector HRLS
terminal and body ground (Refer to P.23A-160).
(3) Transmission range: "D" range
(4) Drive at a constant speed of approximately 20 km/h (12.4
mph) (auxiliary gearbox: at 1st gear).
(5) Use an oscilloscope, measure the voltage between TCM
connector HRLS terminal and body ground.
OK: A wave pattern such as the one shown on
P.23A-160(Check Procedure Using an Oscilloscope) should be output, and the maximum value
should be 11 volts or more and the minimum value
should be 1 volt or less. There should be no noise
in the output wave pattern.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to DTC P0976: Malfunction of the high clutch
and reverse brake solenoid valve (short to ground)
P.23A-97, or DTC P0977: Malfunction of the high
clutch and reverse brake solenoid valve (open
circuit/short to power supply) P.23A-100.
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CVT
DIAGNOSIS
23A-131
STEP 3. Using scan tool (M.U.T.-III), recheck the DTC.
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Q: Is DTC P2859 stored?


YES : Replace the transaxle assembly (Refer to
Go to Step 4.
P.23A-183).
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
 Cope with Intermittent Malfunctions P.00-15).
STEP 4. CVT belt inspection.
Check the appearance of the CVT belt.
(Refer to On-vehicle Service – CVT Belt Inspection)
Q: Is the CVT belt normal?
YES : Replace the valve body assembly.
NO : Replace the transaxle assembly.
DTC P285A: Auxiliary Gearbox Gear 2 Incorrect Ratio
DIAGNOSTIC FUNCTION
The TCM determines that the system is faulty when
the auxiliary gearbox remains the gear ratio is abnormal although the TCM commands the 2nd gear.
DESCRIPTIONS OF MONITOR METHODS
• The system determines that a fault has occurred
when the gear ratio is within ± 10 percent of the
1st gear ratio (1.639 - 2.003) for at least 0.5 second while the TCM is shifting the auxiliary gear to
2nd gear.
• The system determines that a fault has occurred
when the gear ratio is 0.500 or less, or 1.500 or
more for at least 0.2 second while the TCM is
shifting the auxiliary gear to 2nd gear.
MONITOR EXECUTION
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P0705: Malfunction of the transmission range
switch
• P0720: Malfunction of the output speed sensor
• P0791: Malfunction of the secondary pulley
speed sensor
• P0973, P0974: Malfunction of the low brake solenoid valve
• P0976, P0977: Malfunction of the high clutch and
reverse brake solenoid valve
• P2857: Auxiliary gearbox gear 1 incorrect ratio
run-up
• P2858: Auxiliary gearbox gear 2 incorrect ratio
run-up
• P2859: Auxiliary gearbox gear 1 incorrect ratio
• U0001: Malfunction of CAN communication circuit (Bus off)
• U0100: CAN time-out error (Engine)
• Accelerator pedal opening angle: 7.8 percent or
more 
• Vehicle speed: 10 km/h (6 mph) or more 
Sensor (The sensor below is determined to be
• Engine speed: 450 r/min or more
normal)
• Output shaft speed: 300 r/min or more
• Transmission range switch
• Secondary pulley speed: 300 r/min or more
• Output speed sensor
• Transmission range: "D" or "L"
• Secondary pulley speed sensor
• Acceleration: -0.05G or less 
• High clutch and reverse brake solenoid valve
• Target
auxiliary
gear
position:
2nd
04/28/2022
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CVT
DIAGNOSIS
23A-131
STEP 3. Using scan tool (M.U.T.-III), recheck the DTC.
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Q: Is DTC P2859 stored?
YES : Replace the transaxle assembly (Refer to
P.23A-183).
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunctions P.00-15).
DTC P285A: Auxiliary Gearbox Gear 2 Incorrect Ratio
DIAGNOSTIC FUNCTION
The TCM determines that the system is faulty when
the auxiliary gearbox remains the gear ratio is abnormal although the TCM commands the 2nd gear.
DESCRIPTIONS OF MONITOR METHODS
• The system determines that a fault has occurred
when the gear ratio is within ± 10 percent of the
1st gear ratio (1.639 - 2.003) for at least 0.5 second while the TCM is shifting the auxiliary gear to
2nd gear.
• The system determines that a fault has occurred
when the gear ratio is 0.500 or less, or 1.500 or
more for at least 0.2 second while the TCM is
shifting the auxiliary gear to 2nd gear.
MONITOR EXECUTION
• Accelerator pedal opening angle: 7.8 percent or
more 
• Vehicle speed: 10 km/h (6 mph) or more 
• Engine speed: 450 r/min or more
• Output shaft speed: 300 r/min or more
• Secondary pulley speed: 300 r/min or more
• Transmission range: "D" or "L"
• Acceleration: -0.05G or less 
• Target auxiliary gear position: 2nd
04/28/2022
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P0705: Malfunction of the transmission range
switch
• P0720: Malfunction of the output speed sensor
• P0791: Malfunction of the secondary pulley
speed sensor
• P0973, P0974: Malfunction of the low brake solenoid valve
• P0976, P0977: Malfunction of the high clutch and
reverse brake solenoid valve
• P2857: Auxiliary gearbox gear 1 incorrect ratio
run-up
• P2858: Auxiliary gearbox gear 2 incorrect ratio
run-up
• P2859: Auxiliary gearbox gear 1 incorrect ratio
• U0001: Malfunction of CAN communication circuit (Bus off)
• U0100: CAN time-out error (Engine)
Sensor (The sensor below is determined to be
normal)
• Transmission range switch
• Output speed sensor
• Secondary pulley speed sensor
• Low brake solenoid valve
• High clutch and reverse brake solenoid valve
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CVT
23A-132
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
No
Actual auxiliary gear ratio
= 1st
Yes
No
Continuous failure
for 0.5 sec
Yes
Malfunction
Good
END
ACC07036
DTC SET CONDITIONS
Check Conditions
• Target auxiliary gear position: 2nd
• Voltage of battery: 10 volts or more
• Voltage of battery: 16.5 volts or less
• Transmission range: "D" or "L"
• Accelerator pedal position sensor (main) output
voltage: 1.23 volts or more (Opening angle: 7.8
percent or more)
• Engine speed: 450 r/min or more
• Secondary pulley speed: 300 r/min or more
• Output speed: 300 r/min or more
04/28/2022
Judgment Criteria
• The actual gear ratio of the auxiliary gearbox
deviates by ± 10 percent or less from the 1st gear
ratio (1.639 - 2.003) for 0.5 second.
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23A-133
CVT
DIAGNOSIS
LOGIC FLOW CHARTS (Monitor Sequence)
START
No
All secondary parameters
are in the enable condition.
Yes
Yes
Actual auxiliary gear ratio
>= 1.500
No
Yes
Actual auxiliary gear ratio
<= 0.500
No
No
Continuous failure
for 0.2 sec
Yes
Malfunction
Good
END
ACC07037
DTC SET CONDITIONS
Check Conditions
• Target auxiliary gear position: 2nd
• Voltage of battery: 10 volts or more
• Voltage of battery: 16.5 volts or less
• Transmission range: "D" or "L"
• Vehicle speed: 10 km/h (6 mph) or more
• Engine speed: 450 r/min or more
• Secondary pulley speed: 300 r/min or more
• Output speed: 300 r/min or more
• Acceleration: -0.05 G or less
04/28/2022
Judgment Criteria
• The actual gear ratio of the auxiliary gearbox
deviates by ± 50 percent or more from the 2nd
gear ratio (0.500 or less, 1.500 or more) for 0.2
second.
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CVT
23A-134
OBD-II DRIVE CYCLE PATTERN
DIAGNOSIS
 PROBABLE CAUSES
Drive at 40 km/h (24.9 mph) for at least five seconds
with the accelerator opening angle at 10 percent or
more.
Malfunction of the transaxle assembly (Faulty low
brake solenoid valve or valve body assembly)
 • Malfunction of the valve body assembly
DIAGNOSIS
(Faulty low brake solenoid valve)
• Malfunction of the transaxle assembly
Required Special Tools:
• MB992744: Vehicle communication interface-Lite
(V.C.I.-Lite)
• MB992745: V.C.I.-Lite main harness A
• MB992747: V.C.I.-Lite USB cable short
• MB992748: V.C.I.-Lite USB cable long
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicles Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Check the following connector.
• CVT assembly connector
Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the faulty connector.
STEP 2. Measure the output wave pattern of the low brake
solenoid valve at TCM connector (LBLS terminal).
(1) Connect the CVT assembly connector.
(2) Connect an oscilloscope between TCM connector LBLS
terminal and body ground (Refer to P.23A-160).
(3) Transmission range: "D" range
(4) Drive at a constant speed of approximately 20 km/h (12.4
mph) (auxiliary gearbox: at 2nd gear).
(5) Use an oscilloscope, measure the voltage between TCM
connector LBLS terminal and body ground.
OK: A wave pattern such as the one shown on
P.23A-160(Check Procedure Using an Oscilloscope) should be output, and the maximum value
should be 11 volts or more and the minimum value
should be 1 volt or less. There should be no noise
in the output wave pattern.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to DTC P0973: Malfunction of the low brake
solenoid valve (short to ground) P.23A-91, or DTC
P0974: Malfunction of the low brake solenoid valve
(open circuit/short to power supply) P.23A-94.
04/28/2022
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CVT
DIAGNOSIS
23A-135
STEP 3. Using scan tool (M.U.T.-III), recheck the DTC.
Check again if the DTC is stored.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Carry out a test drive with the OBD-II drive cycle pattern.
(4) Recheck the DTC.
Q: Is DTC P285A stored?

 YES : Replace the transaxle assembly (Refer to
Go to Step 4.
P.23A-183).
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
 Cope with Intermittent Malfunctions P.00-15).
STEP 4. CVT belt inspection.
Check the appearance of the CVT belt.
(Refer to On-vehicle Service – CVT Belt Inspection)
Q: Is the CVT belt normal?
YES : Replace the valve body assembly.
NO : Replace the transaxle assembly.
DTC U0001: Malfunction of CAN Communication Circuit (Bus Off)
DIAGNOSTIC FUNCTION
The TCM determines that the system is defective if
CAN communication information cannot be sent or
received.
DESCRIPTIONS OF MONITOR METHODS
TCM cannot receive the periodic communication
data.
MONITOR EXECUTION
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• Not applicable
Sensor (The sensor below is determined to be
normal)
• Not applicable
Continuous
04/28/2022
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