TSB-22-51-003

SUBJECT:
TROUBLESHOOTING WINDSHIELD WIPER –
SERVICE MANUAL REVISION
No:
TSB-22-51-003
DATE:
December 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 Troubleshooting Procedure for the Windshield Wiper in the Exterior
portion of the affected Service Manuals.
AFFECTED VEHICLES
•
•
•
•
2011-2022 Outlander Sport
2014-2020 Outlander
2018-2021 Outlander PHEV
2018-2022 Eclipse Cross
AFFECTED SERVICE MANUAL
• 2011-2022 Outlander Sport Service Manual, Group 51 -Exterior, Windshield Wiper and
Washer
• 2014-2020 Outlander Service Manual, Group 51-Exterior, Windshield Wiper and Washer
• 2018-2021 Outlander PHEV Service Manual, Group 52-Exterior, Windshield Wiper and
Washer
• 2018-2022 Eclipse Cross Service Manual, Group 51-Exterior, Windshield Wiper and Washer
PROCEDURE
Please use the chart on pages 2-3 and replace the indicated pages found in the affected
Service Manuals, Group 51, Exterior, Windshield Wiper and Washer.
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).
12/7/2022
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(5240)

Applicable manual
2011
OUTLANDER SPORT
Service Manual
Pub. No.
MSCD-017B-2011
2012
OUTLANDER SPORT
Service Manual
MSCD-017B-2012
2013
OUTLANDER SPORT
Service Manual
MSCD-017B-2013
2014
OUTLANDER SPORT
Service Manual
MSCD-017B-2014
2015
OUTLANDER SPORT
Service Manual
MSCD-017B-2015
2016
OUTLANDER SPORT
Service Manual
MSCD-017B-2016
2017
OUTLANDER SPORT
Service Manual
MSCD-017B-2017
2018
OUTLANDER SPORT
Service Manual
MSCD-017B-2018
2019
OUTLANDER SPORT
Service Manual
MSCD-017B-2019
2020
OUTLANDER SPORT
Service Manual
MSCD-017B-2020
2021
OUTLANDER SPORT
Service Manual
MSCD-017B-2021
2022
OUTLANDER SPORT
Service Manual
MSCD-017B-2022
12/7/2022
Applicable title
EXTERIOR
└ WINDSHIELD WIPER AND WASHER
└ TROUBLESHOOTING
└ THE WINDSHIELD WIPERS DO NOT WORK AT ALL
2 of 24
Contents
Attached
sheet 6
(5240)

Applicable manual
2014
OUTLANDER
Service Manual
2015
OUTLANDER
Service Manual
2016
OUTLANDER
Service Manual
2017
OUTLANDER
Service Manual
2018
OUTLANDER
Service Manual
2019
OUTLANDER
Service Manual
2020
OUTLANDER
Service Manual
2018
OUTLANDER PHEV
Service Manual
2019
OUTLANDER PHEV
Service Manual
2020
OUTLANDER PHEV
Service Manual
2021
OUTLANDER PHEV
Service Manual
2018
ECLIPSE CROSS
Service Manual
2019
ECLIPSE CROSS
Service Manual
2020
ECLIPSE CROSS
Service Manual
2021
ECLIPSE CROSS
Service Manual
2022
ECLIPSE CROSS
Service Manual
12/7/2022
Pub. No.
MSCD-007B-2014
Applicable title
EXTERIOR
└ WINDSHIELD WIPER AND WASHER
└ TROUBLESHOOTING
└ THE WINDSHIELD WIPERS DO NOT WORK AT ALL
Contents
Attached
sheet 4
EXTERIOR
└ WINDSHIELD WIPER AND WASHER
└ TROUBLESHOOTING
└ THE WINDSHIELD WIPERS DO NOT WORK AT ALL
Attached
sheet 5
EXTERIOR
└ WINDSHIELD WIPER AND WASHER
└ TROUBLESHOOTING
└ THE WINDSHIELD WIPERS DO NOT WORK AT ALL
Attached
sheet 7
MSCD-007B-2015
MSCD-007B-2016
MSCD-007B-2017
MSCD-007B-2018
MSCD-007B-2019
MSCD-007B-2020
MSCD-027B-2018
MSCD-027B-2019
MSCD-027B-2020
MSCD-027B-2021
MSCD-020B-2018
MSCD-020B-2019
MSCD-020B-2020
MSCD-020B-2021
MSCD-020B-2022
3 of 24
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ATTACHED SHEET 4 (1 OF 5)
EXTERIOR
WINDSHIELD WIPER AND WASHER
Inspection Procedure 1: The windshield wipers do not work at all.
.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
TROUBLESHOOTING HINTS
.
TECHNICAL DESCRIPTION (COMMENT)
The windshield wiper motor, the column switch (column-ECU) or ETACS-ECU may be defective. Check
the wiper backup circuit (between the column switch
WB/U and the ETACS-ECU WB/U), and repair if necessary.




Malfunction of the windshield wiper motor
Defective column switch (column-ECU)
The ETACS-ECU may be defective
Damaged harness wires and connectors
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-III), read the diagnostic
trouble code.
CAUTION
To prevent damage to scan tool (M.U.T.-III), always turn the
ignition switch to the OFF position before connecting or
disconnecting scan tool (M.U.T.-III).
(1) Connect scan tool (M.U.T.-III). Refer to GROUP 54A
ETACS, "How to connect the scan tool (M.U.T.-III) ."
(2) Turn the ignition switch to ON.
(3) Check if an ETACS-related diagnosis trouble code
is stored.
(4) Turn the ignition switch to OFF.
Q: Is the DTC stored?
YES : Diagnose the ETACS-ECU. (Refer to GROUP 54A 
ETACS, Diagnosis Trouble Code Chart .)
NO : Go to Step 2.
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EXTERIOR
WINDSHIELD WIPER AND WASHER
STEP 2. Using scan tool (M.U.T.-III), check data list.
CAUTION
To prevent damage to scan tool (M.U.T.-III), always turn the
ignition switch to the OFF position before connecting or
disconnecting scan tool (M.U.T.-III).
(1) Connect scan tool (M.U.T.-III). Refer to GROUP 54A
ETACS, "How to connect the scan tool (M.U.T.-III)."
(2) Turn the ignition switch to OFF.
(3) Check the input signal related to the windshield wiper
operation.
 Turn the ignition switch to the ACC position.
 Operate the windshield wiper switch at ground switch
position.
Item No.
Item name
Windshield Normal
wiper
condition
switch
position
Item 235
Front wiper
ACT
LO
Item 288
ON
HI
INTO
ON and
OFF
MIST
ON
ACC switch
ON
OK: Normal condition is displayed.
Q: Is the check result normal?
YES  :
Go to Step 3.
NO 
:
GROUP 54A  ETACS, Diagnosis - Inspection
Procedure 11 "Column switch signal is not received."
NO 
:
GROUP 54A  ETACS, Diagnosis - Inspection
Procedure 1 "The ignition switch (ACC) signal is
not received" .
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ATTACHED SHEET 4 (3 OF 5)
EXTERIOR
WINDSHIELD WIPER AND WASHER
STEP 3. Check the windshield wiper motor.
(1) Disconnect windshield wiper motor connector.
(2) Connect a battery to the windshield wiper motor as shown.
Then check that the windshield wiper motor operates
normally at high and low speeds.
Q: Is the check result normal?
YES : Go to Step 4.
NO : Replace the windshield wiper motor.
1 2 3
4 5
Operation check
Low speed
1 2 3
4 5
High speed
1 2 3
4 5
ACC00156 AD
STEP 4. Measure the resistance at windshield wiper motor
connector.
(1) Disconnect the connector, and measure the resistance at
the wiring harness.
(2) Measure the resistance between the windshield wiper
motor connector ground terminal and the body ground.
OK: Continuity exists (2  or less)
Q: Is the check result normal?
YES : Go to Step 6.
NO : Go to Step 5.
STEP 5. Check of open circuit in ground lines between
windshield wiper motor connector and body ground.
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00  How
to Use Troubleshooting/Inspection Service Points, 
How to Cope with Intermittent Malfunctions .
NO : Repair the connector(s) or wiring harness.
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ATTACHED SHEET 4 (4 OF 5)
EXTERIOR
WINDSHIELD WIPER AND WASHER

STEP 6. Measure the voltage at ETACS-ECU connector
(+B1 terminal).
(1) Disconnect the connector, and measure the voltage at the
wiring harness side.
(2) Measure the voltage between the ETACS-ECU(+B1
terminal) and the body ground.
OK: System voltage
Q: Is the check result normal?
YES : Go to Step 8.
NO : Go to Step 7.
STEP 7. Check of short to power supply, short to ground,
and open circuit in power supply line between fusible link
and ETACS-ECU connector (+B terminal).
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00  How
to Use Troubleshooting/Inspection Service Points, 
How to Cope with Intermittent Malfunctions.
NO : Repair the connector(s) or wiring harness.
STEP 8.Check of short to power supply, short to ground,
and open circuit in W.LO, HI line between windshield wiper
motor connector and ETACS-ECU connector

Attached sheet 4 (5/5)
Q: Is the check result normal?
YES : Go to Step 9.
NO : Repair the connector(s) or wiring harness.
STEP 9. Check the trouble symptom.
Check that the windshield wipers work normally.
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00  How
to Use Troubleshooting/Inspection Service Points, 
How to Cope with Intermittent Malfunctions.)
NO : Replace the ETACS-ECU.
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ATTACHED SHEET 4 (5 OF 5)
STEP 6. Check whether ETACS-ECU fuse No. 4 is
blown.
STEP 11.Check of short to power supply, short to
ground, and open circuit in W.HI, W.LO line
between windshield wiper motor connector and
ETACS-ECU connector
Q: Is the fuse normal?
YES : Go to Step 7.
NO : Go to Step 13
STEP 7. Check the continuity at windshield wiper
motor connector.
(1) Disconnect the connector, and measure at the wiring
harness side.
(2) Turn the ignition switch to the "ACC" position.
(3) Set the wiper switch to LO condition.
(4) Measure the resistance between the windshield wiper
motor connector (W.LO terminal) and windshield
wiper motor connector (W.AS terminal).
OK: No continuity
Q: Is the check result normal?
YES : Go to Step 9.
NO : Go to Step 8.
STEP 8. Check of short circuit between W.LO line and
W.AS line between ETACS-ECU connector and
windshield wiper motor connector
Q: Is the check result normal?
YES : Replace the ETACS-ECU.
NO : Repair the connector(s) or wiring harness.
STEP 9. Measure the voltage at ETACS-ECU
connector (+B1 terminal).
(1) Disconnect the connector, and measure the voltage at
the wiring harness side.
(2) Measure the voltage between the ETACS-ECU(+B1
terminal) and the body ground.
OK: System voltage
Q: Is the check result normal?
YES : Go to Step 11.
NO : Go to Step 10.
STEP 12. Check the trouble symptom.
Check that the windshield wipers work normally.
Q: Is the check result normal?
YES : Intermittent malfunction. (Refer to GROUP 00 -
How to Use Troubleshooting/Inspection Service
Points, - How to Cope with Intermittent
Malfunctions .)
NO : Replace the ETACS-ECU.
STEP 13. Check the continuity at windshield wiper
motor connector.
(1) Disconnect the connector, and measure at the wiring
harness side.
(2) Measure the resistance between the windshield wiper
motor connector (W.AS terminal) and windshield
wiper motor connector (WACC terminal).
OK: No continuity
Q: Is the check result normal?
YES : Go to Step 15.
NO : Go to Step 14.
STEP 14. Check of short circuit between W.AS line
and WACC line between ETACS-ECU connector and
windshield wiper motor connector
Q: Is the check result normal?
YES : Replace the ETACS-ECU.
NO : Repair the connector(s) or wiring harness, and
replace the ETACS-ECU fuse No. 4.
STEP 15. Check of open circuit and short circuit in
W.HI, W.LO, W.AS, WACC lines between ETACS-ECU
connector and windshield wiper motor connector
STEP 10. Check of short to power supply, short to
ground, and open circuit in power supply line
between fusible link and ETACS-ECU connector
(+B1 terminal).
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00 -
Q: Is the check result normal?
YES : Go to Step 12.
NO : Repair the connector(s) or wiring harness.
Q: Is the check result normal?
YES : Go to Step 16.
NO : Repair the connector(s) or wiring harness, and
replace the ETACS-ECU fuse No. 4.
How to Use Troubleshooting/Inspection Service
Points, - How to Cope with Intermittent
Malfunctions .
NO : Repair the connector(s) or wiring harness.
STEP 16. Check the trouble symptom.
Check that the windshield wipers work normally after
replacing the fuse No.4.
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points - How to Cope with Intermittent
Malfunctions ).
NO : If the fuse blows again, replace the
ETACS-ECU.
12/7/2022
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ATTACHED SHEET 5 (1 OF 4)
EXTERIOR
WINDSHIELD WIPER AND WASHER
Inspection Procedure 1: The windshield wipers do not work at all.
M1511025702058
TROUBLESHOOTING HINTS
CAUTION
Before replacing the ECU, ensure that the power
supply circuit, the ground circuit and the communication circuit are normal.
TECHNICAL DESCRIPTION (COMMENT)
•
•
•
•
Malfunction of the windshield wiper motor
Defective column switch (column-ECU)
The ETACS-ECU may be defective
Damaged harness wires and connectors
The windshield wiper motor, the column switch (column-ECU) or ETACS-ECU may be defective. Check
the wiper backup circuit (between the column switch
connector WB/U terminal and the ETACS-ECU connector WB/U terminal), and repair if necessary.
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB992006: Extra Fine Probe
STEP 1. Using scan tool (M.U.T.-IIISE), read the
ETACS-ECU DTC.
Check if DTC is set in the ETACS-ECU.
CAUTION
To prevent damage to scan tool (M.U.T.-IIISE), always turn
the electric motor switch to the "OFF" position before connecting or disconnecting scan tool (M.U.T.-IIISE).
(1) Connect scan tool (M.U.T.-IIISE). Refer to GROUP 54A,
Diagnostic Function - How to connect the Scan Tool
(M.U.T.-IIISE).
(2) Turn the electric motor switch from "OFF" position to "ON"
position.
(3) Check if DTC is set.
(4) Turn the electric motor switch to the "OFF" position.
Q: Is the DTC set?
YES : Troubleshoot the ETACS (Refer to GROUP 54A,
ETACS - Diagnosis Trouble Code Chart).
NO : Go to Step 2.
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ATTACHED SHEET 5 (2 OF 4)
EXTERIOR
WINDSHIELD WIPER AND WASHER
STEP 2. Using scan tool (M.U.T.-IIISE), check data list.
Check the input signal related to the windshield wiper operation.
• Turn the electric motor switch to the ACC position.
• Operate the windshield wiper switch at each switch
position.
Item No.
Item name
Windshield
wiper switch
position
235
Front wiper ACT LO
Normal
condition
ON
HI
288
ACC switch
AUTO
ON and OFF
MIST
ON
-
ON
OK: Normal condition is displayed.
Q: Is the check result normal?
YES  :
Go to Step 3.
NO 
:
Troubleshoot the ETACS. Refer to GROUP 54A,
ETACS - Inspection Procedure 11 "The column switch
signal is not received".
NO 
Troubleshoot the ETACS. Refer to GROUP 54A,
:
ETACS - Inspection Procedure 1 "The OSSECU (ACC) signal is not received".
STEP 3. Check the windshield wiper motor.
Check the operation of windshield wiper motor at low and
high speed.
Q: Is the check result normal?
YES : Go to Step 4.
NO : Replace the windshield wiper motor.
STEP 4. Measure the resistance at windshield wiper motor
connector.
(1) Disconnect the connector, and measure the resistance at
the wiring harness.
(2) Measure the resistance between the windshield wiper
motor connector ground terminal and the body ground.
OK: Continuity exists (2 ohms or less)
Q: Is the check result normal?
YES : Go to Step 6.
NO : Go to Step 5.
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ATTACHED SHEET 5 (3 OF 4)
EXTERIOR
WINDSHIELD WIPER AND WASHER
STEP 5. Check of open circuit in ground lines between
windshield wiper motor connector and body ground.
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00, How to
Use Troubleshooting/Inspection Service Points - How
to Cope with Intermittent Malfunctions.
NO : Repair the connector(s) or wiring harness.

STEP 6. Measure the voltage at ETACS-ECU connector
(+B1 terminal).
(1) Disconnect the connector, and measure the voltage at the
wiring harness side.
(2) Measure the voltage between the ETACS-ECU (+B1
terminal) and the body ground.
OK: Battery positive voltage
Q: Is the check result normal?
YES : Go to Step 8.
NO : Go to Step 7.

Attached sheet 5 (4/4)
STEP 7. Check of short to power supply, short to ground,
and open circuit in power supply line between fusible link
and ETACS-ECU connector (+B1 terminal).
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00, How to
Use Troubleshooting/Inspection Service Points - How
to Cope with Intermittent Malfunctions.
NO : Repair the connector(s) or wiring harness.
STEP 8.Check of short to power supply, short to ground,
and open circuit in W.LO, W.HI line between windshield
wiper motor connector and ETACS-ECU connector
Q: Is the check result normal?
YES : Go to Step 9.
NO : Repair the connector(s) or wiring harness.
STEP 9. Check the trouble symptom.
Check that the windshield wipers work normally.
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00, How to
Use Troubleshooting/Inspection Service Points - How
to Cope with Intermittent Malfunctions).
NO : Replace the ETACS-ECU.
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ATTACHED SHEET 5 (4 OF 4)
STEP 6. Check whether ETACS-ECU fuse No. 4 is
blown.
STEP 11.Check of short to power supply, short to
ground, and open circuit in W.HI, W.LO line
between windshield wiper motor connector and
ETACS-ECU connector
Q: Is the fuse normal?
YES : Go to Step 7.
NO : Go to Step 13
STEP 7. Check the continuity at windshield wiper
motor connector.
(1) Disconnect the connector, and measure at the wiring
harness side.
(2) Turn the electric motor switch to the "ACC" position.
(3) Set the wiper switch to LO condition.
(4) Measure the resistance between the windshield wiper
motor connector (W.LO terminal) and windshield wiper
motor connector (W.AS terminal).
OK: No continuity
Q: Is the check result normal?
YES : Go to Step 9.
NO : Go to Step 8.
STEP 8. Check of short circuit between W.LO line and
W.AS line between ETACS-ECU connector and
windshield wiper motor connector
Q: Is the check result normal?
YES : Replace the ETACS-ECU.
NO : Repair the connector(s) or wiring harness.
STEP 9. Measure the voltage at ETACS-ECU
connector (+B1 terminal).
(1) Disconnect the connector, and measure the voltage at
the wiring harness side.
(2) Measure the voltage between the ETACS-ECU (+B1
terminal) and the body ground.
OK: Battery positive voltage
Q: Is the check result normal?
YES : Go to Step 11.
NO : Go to Step 10.
STEP 12. Check the trouble symptom.
Check that the windshield wipers work normally.
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points - How to Cope with Intermittent
Malfunctions ).
NO : Replace the ETACS-ECU.
STEP 13. Check the continuity at windshield wiper
motor connector.
(1) Disconnect the connector, and measure at the wiring
harness side.
(2) Measure the resistance between the windshield wiper
motor connector (W.AS terminal) and windshield wiper
motor connector (WACC terminal).
OK: No continuity
Q: Is the check result normal?
YES : Go to Step 15.
NO : Go to Step 14.
STEP 14. Check of short circuit between W.AS line
and WACC line between ETACS-ECU connector and
windshield wiper motor connector
Q: Is the check result normal?
YES : Replace the ETACS-ECU.
NO : Repair the connector(s) or wiring harness, and
replace the ETACS-ECU fuse No. 4.
STEP 10. Check of short to power supply, short to
ground, and open circuit in power supply line
between fusible link and ETACS-ECU connector (+B1
terminal).
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00,
Q: Is the check result normal?
YES : Go to Step 12.
NO : Repair the connector(s) or wiring harness.
STEP 15. Check of open circuit and short circuit in
W.HI, W.LO, W.AS, WACC lines between ETACS-ECU
connector and windshield wiper motor connector
Q: Is the check result normal?
YES : Go to Step 16.
NO : Repair the connector(s) or wiring harness, and
replace the ETACS-ECU fuse No. 4.
How to Use Troubleshooting/Inspection Service
Points - How to Cope with Intermittent
Malfunctions .
NO : Repair the connector(s) or wiring harness.
STEP 16. Check the trouble symptom.
Check that the windshield wipers work normally after
replacing the fuse No.4.
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points - How to Cope with Intermittent
Malfunctions ).
NO : If the fuse blows again, replace the ETACS-ECU.
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ATTACHED SHEET 6 (1 OF 8)
EXTERIOR
WINDSHIELD WIPER AND WASHER
INSPECTION PROCEDURE 1: The windshield wipers do not work at all.
CAUTION
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
Windshield Wiper Power Supply Circuit
BLACK-RED
FUSIBLE
LINK 34
ETACS-ECU
ACC
RELAY 3
WINDSHIELD
WIPER
SPEED
SWITCHING
RELAY
4
1
SKY BLUE
LIGHT GREEN
PINK
VIOLET
WINDSHIELD
WIPER
AUTOMATIC
STOP RELAY
3
2
WINDSHIELD
WIPER
MOTOR
BLACK
CIRCUIT
BREAKER
ACH01680AB
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ATTACHED SHEET 6 (2 OF 8)
EXTERIOR
WINDSHIELD WIPER AND WASHER
Connector: A-09
Connectors: C-403, C-408
ETACS-ECU
A-09 (GR)
C-403
C-408 (B)
ACA03053 AF
ACH02185AB
.
.
CIRCUIT OPERATION
TECHNICAL DESCRIPTION (COMMENT)
 The windshield wiper and washer switch sends a
signal through the column-ECU (incorporated in
the column switch) to the ETACS-ECU. If the column-ECU sends a windshield wiper and washer
switch "ON" signal to the ETACS-ECU, the
ETACS-ECU turns on the relay (incorporated in
the ETACS-ECU), thus causing the windshield
wiper and washer motor to be turned on.
 If the LIN communication line is defective, the
ETACS-ECU operates windshield wiper motor by
using the other communication lines (wiper
backup circuit) instead of that line. In this case,
the windshield wiper works at low speed regardless of the windshield wiper and washer switch
positions ("LO" or "HIGH").
If the windshield wiper does not work at all, the windshield wiper motor, column switch (windshield wiper
and washer switch) or the ETACS-ECU may be
defective.
.
TROUBLESHOOTING HINTS
 Trouble in input signal system
 The wiring harness or connectors may have
loose, corroded, or damaged terminals, or terminals pushed back in the connector
 The wiper motor may be defective
 The column switch may be defective
 The ETACS-ECU may be defective
DIAGNOSIS
Required Special Tools:
 MB991223: Harness Set
 MB992006: Extra Fine Probe
STEP 1. Use the scan tool MB991958 to check if an
ETACS-related diagnostic trouble code is set.
Connect the scan tool. Refer to GROUP 54A ETACS, "How
to connect the scan tool (M.U.T.-III)"
Q: Is the DTC set?
YES : Diagnose the ETACS-ECU. Refer to GROUP 54A
ETACS, "Diagnostic trouble code chart."
NO : Go to Step 2.
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EXTERIOR
WINDSHIELD WIPER AND WASHER
STEP 2. Using scan tool MB991958, check data list.
Check the input signal related to the windshield wiper. operation.
 Ignition switch: ACC
 Operate the windshield wiper switch at each switch position.
Item No.
Item name
Windshield Normal
wiper
condition
switch
position
Item 235
Front wiper
ACT
LO
Item 288
ACC switch
ON
HI
AUTO
ON and
OFF
INT
ON and
OFF
MIST
ON

ON
OK: Normal condition is displayed.
Q: Is the check result normal?
YES  :
Go to Step 3.
NO 
:
Troubleshoot the ETACS-ECU. Refer to ETACS,
Diagnosis - Inspection Procedure 12 "ETACS-ECU
does not receive any signal from the column
switch signal."
NO 
:
Refer to GROUP 54A, ETACS, Diagnosis 
Inspection Procedure 1 "ETACS-ECU does not
receive any signal from the ignition switch (ACC)."
STEP 3. Check windshield wiper motor connector A-09 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is windshield wiper motor connector A-09 in good
condition?
YES : Go to Step 4.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection.
Verify that the windshield wiper works normally.
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ATTACHED SHEET 6 (4 OF 8)
EXTERIOR
WINDSHIELD WIPER AND WASHER
51-43
STEP 4. Check the windshield wiper motor.
(1) Disconnect windshield wiper motor connector A-09.
(2) Connect a battery to the windshield wiper motor as shown.
Then check that the windshield wiper motor operates
normally at high and low speeds.
Q: Does the windshield wiper motor operate normally?
YES : Go to Step 5.
NO : Replace the windshield wiper motor. Verify that the
windshield wiper works normally.
1 2 3
4 5
Operation check
1 2 3
4 5
Low speed
1 2 3
4 5
High speed
AC606879 AF
STEP 5. Check the ground circuit to the windshield wiper
motor. Measure the resistance at the windshield wiper
motor connector A-09.
(1) Disconnect windshield wiper motor connector A-09 and
measure the resistance available at the wiring harness side
of the connector.
(2) Measure the resistance value between terminal 5 and
ground.
 The resistance should be 2 ohms or less.
Harness side: A-09
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 7.
NO : Go to Step 6.
AC608255EQ
STEP 6. Check the wiring harness between windshield
wiper motor connector A-09 (terminal 5) and ground.
Q: Is the wiring harness between windshield wiper motor
connector A-09 (terminal 5) and ground in good
condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. Verify the
windshield wiper works normally.
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ATTACHED SHEET 6 (5 OF 8)
EXTERIOR
WINDSHIELD WIPER AND WASHER

STEP 7. Check ETACS-ECU connector C-408 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-408 in good condition?
YES : Go to Step 8.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection.
Verify that the windshield wiper works normally.
STEP 8. Measure the voltage at ETACS-ECU connector
C-408.
(1) Disconnect ETACS-ECU connector C-408 and measure the
resistance available at the wiring harness side of the
connector.
(2) Measure the voltage between terminal 1 and ground.
 The voltage should measure approximately 12 volts
(battery positive voltage).
Harness side: C-408
Q: Is the measured voltage approximately 12 volts (battery
positive voltage)?
YES : Go to Step 10.
NO : Go to Step 9.
AC608254 GS
STEP 9. Check the wiring harness between ETACS-ECU
connector C-408 (terminal 1) and the fusible link (34).
 Check the power supply line for open circuits.
Q: Is the wiring harness between ETACS-ECU connector
C-408 (terminal 1) and the fusible link (34) in good
condition?
YES : Intermittent malfunction. Refer to GROUP 00, How to
cope with intermittent malfunction.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Cables and wire check.
STEP 10. Check ETACS-ECU connector C-403 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-403 in good condition?
YES : Go to Step 11.
NO : Repair the damaged connector.

Attached sheet 6 (7/8, 8/8)
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ATTACHED SHEET 6 (6 OF 8)
EXTERIOR
WINDSHIELD WIPER AND WASHER

STEP 11. Measure the voltage at ETACS-ECU connector
C-403.
(1) Disconnect ETACS-ECU connector C-403 and measure the
resistance available at the wiring harness side of the
connector.
(2) Ignition switch: ACC
(3) windshield wiper switch: HI
(4) Measure the voltage between C-403 ETACS-ECU
connector terminal No. 5 and ground.
OK: Battery positive voltage
(5) windshield wiper switch: LO
Harness side: C-403
AC608254 GT
(6) Measure the voltage between C-403 ETACS-ECU
connector terminal No. 6 and body ground.
OK: Battery positive voltage
Q: Is the measured voltage approximately 12 volts (battery
positive voltage)?
YES : Go to Step 13.
NO : Go to Step 12.
Harness side: C-403
AC608254 GU
STEP 12. Check the wiring harness between ETACS-ECU
connector C-403 (terminals 5, 6) and windshield wiper
motor connector A-09 (terminals 1, 4).
 Check the input and output lines for open or short circuit.
Q: Is the wiring harness between ETACS-ECU connector
C-403 (terminals 5, 6) and windshield wiper motor
connector A-09 (terminals 1, 4) in good condition?
YES : Go to Step 13.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Cables and wire check.
STEP 13. Retest the system.
Check that the windshield wipers work normally.
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00, How to
cope with intermittent malfunction.
NO : Replace the ETACS-ECU.
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STEP 7. Check whether ETACS-ECU fuse No. 4 is
blown.
Q: Is the fuse normal?
YES : Go to Step 8.
NO : Go to Step 16.
STEP 12. Measure the voltage at ETACS-ECU
connector C-408.
(1) Disconnect ETACS-ECU connector C-408 and
measure the resistance available at the wiring
harness side of the connector.
STEP 8. Check ETACS-ECU connector C-403 for
loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Harness side: C-408
Q: Is ETACS-ECU connector C-403 in good condition?
YES : Go to Step 9.
NO : Repair the damaged connector.
STEP 9. Check the continuity at windshield
wiper motor connector A-09.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Turn the ignition switch to the "ACC" position.
(3) Set the wiper switch to LO condition.
(4) Measure the resistance between the A-09
windshield wiper motor connector (Terminal No.
4)) nd windshield wiper motor connector
(terminal No. 3).
OK: No continuity
AC608254 GS
(2) Measure the voltage between terminal No.1 and
ground.
 The voltage should measure approximately
12 volts (battery positive voltage).
Q: Is the measured voltage approximately 12 volts
(battery positive voltage)?
YES : Go to Step 14.
NO : Go to Step 13.
STEP 13. Check the wiring harness between
ETACS-ECU connector C-408 (terminal No.1) and
the fusible link (34).
 Check the power supply line for open circuits.
Q: Is the check result normal?
YES : Go to Step 11.
NO : Go to Step 10.
Q: Is the wiring harness between ETACS-ECU
connector C-408 (terminal No.1) and the fusible
link (34) in good condition?
YES : Intermittent malfunction. Refer to GROUP
STEP 10. Check wiring harness between
ETACS-ECU connector C-403 (terminal Nos. 6
and 8), and windshield wiper motor connector
A-09 (terminal Nos. 4 and 3).
 Check the short circuit between the wiring harnesses.
00, How to cope with intermittent
malfunction .
NO : Repair or replace the damaged
component(s). Refer to GROUP 00E,
Cables and wire check .
Q: Is the check result normal?
YES : Replace the ETACS-ECU.
NO : Repair the connector(s) or wiring harness.
STEP 11. Check ETACS-ECU connector C-408 for
loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Is ETACS-ECU connector C-408 in good condition?
YES : Go to Step 12.
NO : Repair or replace the damaged
component(s). Refer to GROUP 00E,
Harness Connector Inspection . Verify that
the windshield wiper works normally.
STEP 14. Check the wiring harness between
ETACS-ECU connector C-403 (terminal
Nos.5 and 6) and windshield wiper motor
connector A-09 (terminal Nos. 1 and 4).
 Check the input and output lines for open circuit or
short circuit.
Q: Is the wiring harness between ETACS-ECU
connector C-403 (terminal Nos.5 and 6) and
windshield wiper motor connector A-09
(terminal Nos. 1 and 4) in good condition?
YES : Go to Step 15.
NO : Repair or replace the damaged
component(s). Refer to GROUP 00E,
Cables and wire check .
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STEP 18. Check wiring harness between
ETACS-ECU connector C-403 (terminal Nos. 8
and 12), and windshield wiper motor
connector A-09 (terminal Nos. 3 and 2).
 Check the short circuit between the wiring harnesses.
STEP 15. Retest the system.
Check that the windshield wipers work normally.
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP
00, How to cope with intermittent
malfunction .
NO : Replace the ETACS-ECU.
STEP 16. Check ETACS-ECU connector C-403 for
loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Is ETACS-ECU connector C-403 in good condition?
YES : Go to Step 17.
NO : Repair the damaged connector.
STEP 17. Check the continuity at A-09 windshield
wiper motor connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Measure the resistance between the
windshield wiper motor connector A-09 (terminal
No.3)and windshield wiper motor connector A-09
(terminal No. 2).
OK: No continuity
Q: Is the check result normal?
YES : Go to Step 19.
NO : Go to Step 18.
Q: Is the check result normal?
YES : Replace the ETACS-ECU.
NO : Repair the connector(s) or wiring harness,
and replace the ETACS-ECU fuse No. 4.
STEP 19. Check wiring harness between
ETACS-ECU connector C-403 (terminal Nos. 5,
6, 8 and 12), and windshield wiper motor
connector A-09 (terminal Nos. 1, 4, 3 and 2).
 Check the open circuit and short circuit in the
input/output lines.
Q: Is the check result normal?
YES : Go to Step 20.
NO : Repair the connector(s) or wiring harness,
and replace the ETACS-ECU fuse No. 4.
STEP 20. Retest the system.
Check that the windshield wipers work normally after
replacing the fuse No.4.
Q: Is the check result normal?
YES : Intermittent malfunction (Refer to GROUP
00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with
Intermittent Malfunction ).
NO : If the fuse blows again, replace the
ETACS-ECU.
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ATTACHED SHEET 7 (1 OF 4)
WINDSHIELD WIPER AND WASHER
Inspection Procedure 1: The windshield wipers do not work at all.
CAUTION
Before replacing the ECU, ensure that the power supply
circuit, the ground circuit and the communication circuit
are normal.
TECHNICAL DESCRIPTION (COMMENT)
The windshield wiper motor, the column switch (column-ECU)
or ETACS-ECU may be defective. Check the wiper backup circuit (between the column switch connector WB/U terminal and
the ETACS-ECU connector REQC terminal), and repair if necessary.
TROUBLESHOOTING HINTS
•
•
•
•
Malfunction of the windshield wiper motor
Defective column switch (column-ECU)
The ETACS-ECU may be defective
Damaged harness wires and connectors
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB992006: Extra Fine Probe
STEP 1. Using scan tool (M.U.T.-IIISE), read the
ETACS-ECU DTC.
Check if DTC is set in the ETACS-ECU.
CAUTION
To prevent damage to scan tool (M.U.T.-IIISE), always turn
the electric motor switch to the "OFF" position before connecting or disconnecting scan tool (M.U.T.-IIISE).
(1) Connect scan tool (M.U.T.-IIISE). Refer to GROUP 54A,
Diagnostic Function - How to connect the Scan Tool
(M.U.T.-IIISE).
(2) Turn the electric motor switch from "OFF" position to "ON"
position.
(3) Check if DTC is set.
(4) Turn the electric motor switch to the "OFF" position.
Q: Is the DTC set?
YES : Troubleshoot the ETACS (Refer to GROUP 54A,
ETACS - Diagnosis Trouble Code Chart).
NO : Go to Step 2.
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EXTERIOR
WINDSHIELD WIPER AND WASHER
STEP 2. Using scan tool (M.U.T.-IIISE), check data list.
Using scan tool (M.U.T.-IIISE), check the ETACS system data
list (Refer to GROUP 54A, ETACS - Troubleshooting, Data List
Reference Table).
• Item 27: Front wiper (INT)
• Item 28: Front wiper (LO)
• Item 29: Front wiper (HI)
• Item 33: Front wiper (MIST)
• Item 111: ACC switch
Q: Is the check result normal?
YES  :
Go to Step 3.
NO  : Troubleshoot the ETACS. Refer to GROUP
54A, ETACS - Inspection Procedure 11 "The column
switch signal is not received".
NO 
Troubleshoot the ETACS. Refer to GROUP 54A,
:
ETACS - Inspection Procedure 1 "The OSSECU (ACC) signal is not received".
STEP 3. Check the windshield wiper motor.
Check the operation of windshield wiper motor at low and
high speed.
Q: Is the check result normal?
YES : Go to Step 4.
NO : Replace the windshield wiper motor.
STEP 4. Measure the resistance at windshield wiper motor
connector.
(1) Disconnect the connector, and measure the resistance at
the wiring harness.
(2) Measure the resistance between the windshield wiper
motor connector ground terminal and the body ground.
OK: Continuity exists (2 ohms or less)
Q: Is the check result normal?
YES : Go to Step 6.
NO : Go to Step 5.
STEP 5. Check of open circuit in ground lines between
windshield wiper motor connector and body ground.
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00, How to
Use Troubleshooting/Inspection Service Points - How
to Cope with Intermittent Malfunctions.
NO : Repair the connector(s) or wiring harness.
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ATTACHED SHEET 7 (3 OF 4)
WINDSHIELD WIPER AND WASHER

STEP 6. Measure the voltage at ETACS-ECU connector
(+B1 terminal).
(1) Disconnect the connector, and measure the voltage at the
wiring harness side.
(2) Measure the voltage between the ETACS-ECU (+B1
terminal) and the body ground.
OK: Battery positive voltage
Q: Is the check result normal?
YES : Go to Step 8.
NO : Go to Step 7.

Attached sheet 7 (4/4)
STEP 7. Check of short to power supply, short to ground,
and open circuit in power supply line between fusible link
and ETACS-ECU connector (+B1 terminal).
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00, How to
Use Troubleshooting/Inspection Service Points - How
to Cope with Intermittent Malfunctions.
NO : Repair the connector(s) or wiring harness.
STEP 8.Check of short to power supply, short to ground,
and open circuit in W.LO, W.HI line between windshield
wiper motor connector and ETACS-ECU connector
Q: Is the check result normal?
YES : Go to Step 9.
NO : Repair the connector(s) or wiring harness.
STEP 9. Check the trouble symptom.
Check that the windshield wipers work normally.
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00, How to
Use Troubleshooting/Inspection Service Points - How
to Cope with Intermittent Malfunctions).
NO : Replace the ETACS-ECU.
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STEP 11.Check of short to power supply, short to
ground, and open circuit in W.HI, W.LO line between
windshield wiper motor connector and ETACS-ECU
connector
STEP 6. Check whether ETACS-ECU fuse No. 4 is
blown.
Q: Is the fuse normal?
YES : Go to Step 7.
NO : Go to Step 13
STEP 7. Check the continuity at windshield wiper
motor connector.
(1) Disconnect the connector, and measure at the wiring
harness side.
(2) Turn the ignition switch to the "ACC" position.
(3) Set the wiper switch to LO condition.
(4) Measure the resistance between the windshield wiper
motor connector (W.LO terminal) and windshield wiper
motor connector (W.AS terminal).
OK: No continuity
Q: Is the check result normal?
YES : Go to Step 9.
NO : Go to Step 8.
STEP 8. Check of short circuit between W.LO line and
W.AS line between ETACS-ECU connector and
windshield wiper motor connector
Q: Is the check result normal?
YES : Replace the ETACS-ECU.
NO : Repair the connector(s) or wiring harness.
STEP 9. Measure the voltage at ETACS-ECU
connector (+B1 terminal).
(1) Disconnect the connector, and measure the voltage at
the wiring harness side.
(2) Measure the voltage between the ETACS-ECU (+B1
terminal) and the body ground.
OK: Battery positive voltage
Q: Is the check result normal?
YES : Go to Step 11.
NO : Go to Step 10.
STEP 12. Check the trouble symptom.
Check that the windshield wipers work normally.
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points - How to Cope with Intermittent
Malfunctions ).
NO : Replace the ETACS-ECU.
STEP 13. Check the continuity at windshield wiper
motor connector.
(1) Disconnect the connector, and measure at the wiring
harness side.
(2) Measure the resistance between the windshield wiper
motor connector (W.AS terminal) and windshield wiper
motor connector (WACC terminal).
OK: No continuity
Q: Is the check result normal?
YES : Go to Step 15.
NO : Go to Step 14.
STEP 14. Check of short circuit between W.AS line
and WACC line between ETACS-ECU connector and
windshield wiper motor connector
Q: Is the check result normal?
YES : Replace the ETACS-ECU.
NO : Repair the connector(s) or wiring harness, and
replace the ETACS-ECU fuse No. 4.
STEP 15. Check of open circuit and short circuit in
W.HI, W.LO, W.AS, WACC lines between ETACS-ECU
connector and windshield wiper motor connector
STEP 10. Check of short to power supply, short to
ground, and open circuit in power supply line
between fusible link and ETACS-ECU connector (+B
terminal).
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00,
Q: Is the check result normal?
YES : Go to Step 12.
NO : Repair the connector(s) or wiring harness.
Q: Is the check result normal?
YES : Go to Step 16.
NO : Repair the connector(s) or wiring harness, and
How to Use Troubleshooting/Inspection Service
Points - How to Cope with Intermittent
Malfunctions .
NO : Repair the connector(s) or wiring harness.
replace the ETACS-ECU fuse No. 4.
STEP 16. Check the trouble symptom.
Check that the windshield wipers work normally after
replacing the fuse No.4.
Q: Is the check result normal?
YES : Intermittent malfunction. Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points - How to Cope with Intermittent
Malfunctions ).
NO : If the fuse blows again, replace the ETACS-ECU.
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