T-SB-0014-18

T-SB-0014-18
February 16, 2018
MIL "ON" DTC P1CB7A2
Service
Category
Vehicle Interior
Section
Meter/Gauge/Display
Market USA
Applicability
YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2016
Prius
VDS(s): KARFU, KBRFU
Introduction
Some 2016 model year Prius vehicles may exhibit a MIL “ON” condition with Diagnostic Trouble
Code (DTC) P1CB7A2 (Motor Generator System Voltage Low). The Hybrid Vehicle Control
Computer (ECU) logic has been modified. Follow the Repair Procedure in this bulletin to address
this condition.
NOTE
This Service Bulletin applies to both Nickel-Metal Hydride (NiMH) and Lithium Ion (Li-ion) equipped
2016 Prius vehicles.
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs
shown below.
MODEL
HV BATTERY TYPE
PRODUCTION CHANGE EFFECTIVE VIN
Nickle-Metal Hydride (NiMH)
JTDKBRFU#G3012347
Lithium Ion (Li-ion)
JTDKARFU#G3014652
Prius
© 2018 Toyota Motor Sales, USA
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T-SB-0014-18
February 16, 2018
Page 2 of 8
MIL "ON" DTC P1CB7A2
3
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
EL1712
Reprogram HV ECU
0.4
89981- #####
EL1713
R & R Inverter Battery and Reprogram HV ECU
1.0
8598B-47010
T1
T2
8A
99
APPLICABLE WARRANTY
 This repair is covered under the Toyota Hybrid Vehicle System Component Warranty. This
warranty is in effect for 96 months or 100,000 miles, whichever occurs first, from the vehicle’s
in-service date.
 Warranty application is limited to occurrence of the specified condition described in
this bulletin.
Parts Information
PART NUMBER
PART NAME
HV BATTERY TYPE
PREVIOUS
NEW
Nickle-Metal Hydride (NiMH)
89981-47550
89981-47551
89981-47555
Lithium Ion (Li-ion)
89981-47570
89981-47571
QTY
1
Computer, Hybrid Vehicle Control
89981-47575
1
NiMH and Li-ion
8598B-47010
Battery, Inverter
1
–
00451-00001-LB L
Authorized Modifications Labels
1
NOTE
 The HV ECU should NOT be replaced as part of the Repair Procedure.
 Authorized Modifications Labels may be ordered in packages of 25 from the Materials
Distribution Center (MDC) through Dealer Daily – Parts – Dealer Support Materials Orders.
© 2018 Toyota Motor Sales, USA
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February 16, 2018
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MIL "ON" DTC P1CB7A2
Required Tools & Equipment
REQUIRED EQUIPMENT
SUPPLIER
PART NUMBER
Techstream 2.0*
QTY
TS2UNIT
Techstream Lite
ADE
TSLITEPDLR01
Techstream Lite (Green Cable)
1
TSLP2DLR01
* Essential SST.
NOTE
 Only ONE of the Techstream units listed above is required.
 Software version 12.20.024 or later is required.
 Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.
 Use Techstream or an approved J2534 interface to perform flash reprogramming updates.
Visit techinfo.toyota.com for more information regarding J2534 reprogramming.
SPECIAL SERVICE TOOLS (SST)
PART NUMBER
QTY
GR8 Battery Diagnostic Station*
00002-MCGR8
1
* Essential SST.
NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.
Calibration Information
HV ECU CALIBRATION ID
HV ECU SUPPLIER
Denso
HYBRID BATTERY TYPE
ECU TYPE
PREVIOUS
NEW
Main
899834734000
899834757000
899834734100
899834757100
899834734200
899834757200
899834734300
899834757300
899834734400
Sub
899854701000
899854707000
899854701100
899854707100
899854701200
899854707200
899854701300
Nickle-Metal Hydride
(NiMH)
© 2018 Toyota Motor Sales, USA
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MIL "ON" DTC P1CB7A2
Calibration Information (continued)
HV ECU CALIBRATION ID
HV ECU SUPPLIER
TMC
HYBRID BATTERY TYPE
ECU TYPE
PREVIOUS
NEW
Main
899834751000
899834760000
899834751100
899834760100
899834751200
899834760200
899834751300
899834760300
899834751400
Sub
899854702000
899854702100
899854702200
899854702300
Nickle-Metal Hydride
(NiMH)
Main
Denso
Sub
Lithium Ion (Li-ion)
899834735000
899834758000
899834735100
899834758100
899834735200
899834758200
899834735300
899834758300
899854701000
899854707000
899854701100
899854707100
899854701200
899854707200
899834735400
899854701300
Main
899834752000
899834761000
899834752100
899834761100
899834752200
899834761200
899834752300
899834761300
899834752400
Sub
899854702000
899854702100
899854702200
899854702300
TMC
© 2018 Toyota Motor Sales, USA
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February 16, 2018
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MIL "ON" DTC P1CB7A2
Repair Procedure
1. Using Techstream, check for the following stored DTC:
P1CB7A2 – Motor Generator System Voltage Low.
Is the DTC present?
 YES — Perform steps 1 – 5 in the Repair Manual, then continue to step 2 of this bulletin.
Refer to TIS, applicable model and model year Repair Manual:


2016 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid/Battery
Control: Motor Generator Control System (for Nickel Metal Hydride Battery) /
(for Lithium-Ion Battery): P1CB7A2; Motor Generator System Voltage Low”
NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Was the result from step 5 in the Repair Manual, “P1CB7A2 only is output, or DTCs except
the ones in the table below are also output”?
 YES — Continue to step 3.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
3. Perform steps 6 – 26 in the Repair Manual to confirm the connection and system wiring
condition. Repair the writing and/or connection(s) as necessary BEFORE proceeding to
step 4 of this Service Bulletin.
NOTE
Do NOT replace the inverter battery at this step.
Refer to TIS, applicable model and model year Repair Manual:

2016 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid/Battery Control: Motor
Generator Control System (for Nickel Metal Hydride Battery) / (for Lithium-Ion Battery):
P1CB7A2; Motor Generator System Voltage Low”
4. Check the inverter battery operation.
A.
B.
C.
D.
Clear ALL DTCs.
IG-ON Ready-ON the vehicle for AT LEAST 5 minutes.
IG-ON Ready-OFF the vehicle for AT LEAST 2 minutes.
Repeat substeps B and C.
E. Conduct a Health Check.
F. Go to the motor generator.
G. Check if DTC P1CB7A2 has set and is “Confirmed.” Record “Confirmed” or
“Not Confirmed” result for use in step 5.
© 2018 Toyota Motor Sales, USA
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February 16, 2018
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MIL "ON" DTC P1CB7A2
Repair Procedure (continued)
5. Judge re-calibration and/or necessary part replacement in the table below with the results
from step 4.
HV MAIN SOFTWARE ID
899834751000
899834760000
899834734000
899834757000
899834752000
899834761000
899834735000
899834758000
899834751100
899834760100
899834734100
899834757100
899834752100
899834761100
899834735100
899834758100
899834751200
899834760200
899834734200
899834757200
899834752200
899834761200
899834735200
899834758200
899834751300
899834760300
899834734300
899834757300
899834752300
899834761300
899834735300
RESULT OF STEP 4
PROCEED WITH REPAIR
Not Confirmed
Reprogram HV Software to
Latest Calibration
Confirmed
Replace Inverter Battery
and Reprogram HV
Software to
Latest Calibration
Not Confirmed
–
Confirmed
Replace Inverter Battery
899834758300
Other Than Listed Above
© 2018 Toyota Motor Sales, USA
T-SB-0014-18
February 16, 2018
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MIL "ON" DTC P1CB7A2
Repair Procedure (continued)
6. Check for the Authorized Modifications Label affixed to the vehicle in the location shown
below. Confirm if the HV ECU calibration has been updated.
Is the calibration ID listed the latest HV ECU calibration?
 YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
 NO — Continue to step 8.
Figure 1. Location of Authorized Modifications Label for 2016 Prius
TOYOTA MOTOR CORPORATION
A UTHORIZE D
M OD IF IC A TIONS
THE FOLLOWING MODIFICATIONS HAVE BEEN MADE:
1
2
THESE MODIFICATIONS HAVE BEEN APPROVED
AS APPROPRIATE BY EPA AND CARB
3
DEALER CODE:
CHANGE AUTHORITY:
4
DATE:
5
1
Replacement HV ECU Part Num ber
(e.g., 89981-47572)
4
Date Com pleted
2
New Calibration ID (e.g., 899834734400)
5
This SB Num ber
3
Dealer Code
© 2018 Toyota Motor Sales, USA
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February 16, 2018
Page 8 of 8
MIL "ON" DTC P1CB7A2
Repair Procedure (continued)
7. Flash reprogram the HV ECU.
NOTE
 The GR8 Battery Diagnostic Station MUST be used in Power Supply Mode to maintain battery
voltage at 13.5V while flash reprogramming vehicle.
 For details on how to use the GR8 Battery Diagnostic Station, refer to the
“GR8 Instruction Manual” located at TIS – Diagnostics – Tools & Equipment – Battery Diagnostics.
Follow the procedures outlined in Service Bulletin No. T-SB-0134-16 “Techstream ECU Flash
Reprogramming Procedure,” and flash the with the NEW calibration file update.
8. Prepare and install the Authorized Modifications Label.
A. Using a permanent marker, enter the following information on the label:
 HV ECU part number [Refer to the Parts Information section for the NEW
PART NUMBER]
 Calibration ID(s) [Refer to the Calibration Information section for the NEW
CALIBRATION ID]
 Dealer Code
 Repair Date
 Change Authority [This bulletin number]
B. Affix the Authorized Modifications Label to the vehicle at the location shown in Figure 1.
The Authorized Modifications Label is available through the MDC, P/N 00451-00001-LBL.
9. Replace the inverter battery if required.
Refer to TIS, applicable model and model year Repair Manual:

2016 Prius:
Engine/Hybrid System – Hybrid/Battery Control – “Hybrid / Battery Control: Inverter Battery:
Removal / Installation”
10. Test drive the vehicle to confirm that the DTC does NOT reset.
© 2018 Toyota Motor Sales, USA