NHTSA ID Number: 10235229
Manufacturer Communication Number: TSB001123
TSB/Document Date: 2023-05-01
Summary
TSB: Some 2010 ? 2015 model year Prius and 2012 ? 2017 model year Prius V vehicles may exhibit a MIL ON condition with Diagnostic Trouble Codes (DTCs) P0A7A and/or P0A78, indicating a malfunction has occurred in the inverter assembly with converter. Follow the Repair Procedure in this bulletin to identify the specific components within the inverter assembly with converter that need to be replaced and address this condition.
T-SB-0011-23
February 16, 2023
MIL ON With DTCs P0A7A and/or P0A78
Service
Category
Engine/Hybrid
System
Section
Market USA
Applicability
YEAR(S)
MODEL(S)
2012 - 2017
Prius V
2010 - 2015
Prius
ADDITIONAL INFORMATION
Introduction
Some 2010 – 2015 model year Prius and 2012 – 2017 model year Prius V vehicles may exhibit a
MIL ON condition with Diagnostic Trouble Codes (DTCs) P0A7A and/or P0A78, indicating a
malfunction has occurred in the inverter assembly with converter. Follow the Repair Procedure in
this bulletin to identify the specific components within the inverter assembly with converter that
need to be replaced and address this condition.
© 2023 Toyota Motor Sales, USA
Page 1 of 8
T-SB-0011-23
February 16, 2023
Page 2 of 8
MIL ON With DTCs P0A7A and/or P0A78
Warranty Information
OP CODE
DESCRIPTION
EL9079
Replace IPM Transistor
EL9080
EL9081
EL9082
EL9083
MODEL
TIME
Prius
2.9
Prius V
2.9
Prius
2.9
Prius V
2.9
Prius
3.0
Prius V
3.2
Prius
3.0
Prius V
3.2
Prius
2.0
Prius V
1.6
OFP
T1
T2
G9200-#####*
8A
73
Replace IPM Transistor and MG ECU
Replace IPM Transistor, MG ECU,
and Inverter Current Sensor
Replace IPM Transistor, MG ECU,
Inverter Current Sensor, and Wire
Sub Assy
Replace Inverter Assembly
*Warranty claim MUST be submitted with the correct 10-digit OFP. Choose the correct OFP for the vehicle being repaired
by searching for the parts in the Electronic Parts Catalog using the VIN filter.
APPLICABLE WARRANTY
This repair is covered under the Toyota Hybrid 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.
For 2010 – 2015 model year Prius vehicles equipped with a California Certified Emission Control
System that are registered and operated in California or any state that adopts California emission
warranty - Partial Zero Emission Vehicle (PZEV) Emission Warranty Coverage is in effect for 15
years or 150,000 miles, from the vehicle’s in-service date, whichever occurs first. (Please
reference Warranty Policy Bulletin POL14-09, Warranty Policy 4.7, and/or the Owner’s Warranty &
Maintenance Guide for additional information) Partial Zero Emission Vehicle (PZEV) Emission
Warranty Coverage does not apply to Prius V.
For vehicles outside of Toyota Hybrid System Warranty or Partial Zero Emission (PZEV)
Emission Warranty Coverage, please check for any additional coverage under CSP programs.
© 2023 Toyota Motor Sales, USA
T-SB-0011-23
February 16, 2023
Page 3 of 8
MIL ON With DTCs P0A7A and/or P0A78
Parts Information
PART NUMBER*1
PART NAME
QTY
G9200-##### (Order by VIN)
Inverter Assy, W/Converter
1*2
G920H-##### (Order by VIN)
Computer Sub-assy, MG Control W/Bracket
1*2
G920J-52010
Sensor Sub-assy, Inverter Current
1*2
G9208-47090
1*2
04899-47070
Transistor Kit, Power Module Intelligent (IPM)
1*2, *7
08826-00100
Seal Packing or Equivalent
1*2
00272-SLLC2
Super Long Life Coolant
1*3
04899-47060
Plug Kit, Inverter Drain
1*3
90430-18008
Gasket
1*3
G922L-47010
Cover, Inverter Signal Connector
1*4
91551-80618
Bolt, Flange
15*4
091X1-47020
Seal, Masking, No. 1
1*5
08887-02809
Toyota Thermal Grease X-23-7884-4
2*6
*1 Part numbers are subject to change. Order the correct part number by inputting the VIN in the EPC.
*2 Refer to step 3 in this Service Bulletin to determine if the part is required.
*3 Required for ANY Repair Procedure in this Service Bulletin.
*4 NOT required. Available in case of breakage.
*5 Included in IPM Kit. Available if spare is needed.
*6 Used ONLY for IPM replacement. Part has shelf life of one year. Do NOT use if stored past one year.
*7 The appearance of the replacement IPM may be different than the original part.
© 2023 Toyota Motor Sales, USA
T-SB-0011-23
February 16, 2023
Page 4 of 8
MIL ON With DTCs P0A7A and/or P0A78
Required Tools & Equipment
SPECIAL SERVICE TOOLS (SST)
PART NUMBER
QTY
Anti-static Mat*
09890-47010-01
1
Squeegee*
09891-47010-1A
1
Torque Wrench Adapter*
09961-00950
1
Inverter Case Separator*
09891-47020-01
1
01413-00072 (Medium)
Electrical Insulating Gloves*
01413-00073 (Large)
1
01413-00074 (Extra Large)
*Essential SST.
CAUTION
ALWAYS inspect electrical insulating gloves before use for cracks, ruptures, tears, pinholes, or
damage. Do NOT wear if damaged.
NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.
REQUIRED EQUIPMENT
SUPPLIER
Techstream ADVI*
PART NUMBER
QTY
TSADVUNIT
Techstream 2.0
TS2UNIT
ADE
1
Techstream Lite
TSLITEPDLR01
Techstream Lite (Green Cable)
TSLP2DLR01
*Essential SST.
NOTE
Only ONE of the Techstream units listed above is required.
Software version 17.30.011 or later is required.
Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.
© 2023 Toyota Motor Sales, USA
T-SB-0011-23
February 16, 2023
Page 5 of 8
MIL ON With DTCs P0A7A and/or P0A78
Repair Procedure
1. Confirm the condition exists.
A. Are DTCs P0A7A and/or P0A78 stored?
YES — Continue to substep B.
NO — Continue to substep C.
B. Does the vehicle exhibit thermal damage
to the inverter assembly with converter
in the location shown?
Figure 1.
YES — Continue to step 2.
NO — Go to step 3.
C. Does the vehicle exhibit thermal damage
to the inverter assembly with converter
in the location shown?
YES — Continue to step 2.
NO — This bulletin does NOT apply.
Continue diagnosis using the
applicable Repair Manual.
2. Replace the inverter assembly with converter.
Refer to TIS, applicable model and model year Repair Manual:
2010 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Inverter With Converter: Removal / Installation”
2011 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Inverter With Converter: Removal / Installation”
2012 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Inverter With Converter: Removal / Installation”
2013 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Inverter With Converter: Removal / Installation”
2014 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Inverter With Converter: Removal / Installation”
2015 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Inverter With Converter: Removal / Installation”
© 2023 Toyota Motor Sales, USA
T-SB-0011-23
February 16, 2023
Page 6 of 8
MIL ON With DTCs P0A7A and/or P0A78
Repair Procedure (continued)
2012 Prius V:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Inverter With Converter: Removal / Installation”
2013 Prius V:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Inverter With Converter: Removal / Installation”
2014 Prius V:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Inverter With Converter: Removal / Installation”
2015 Prius V:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Inverter With Converter: Removal / Installation”
2016 – 2017 Prius V:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Inverter With Converter: Removal / Installation”
A. The repair is now complete. Clear ANY DTCs and confirm the condition is no
longer present.
3. Follow the Repair Manual diagnostic procedure to determine the correct components
to replace.
Refer to TIS, applicable model and model year Repair Manual:
2010 / 2011 / 2012 / 2013 / 2014 / 2015 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Hybrid Control System: DTC Check / Clear”
2012 / 2013 / 2014 / 2015 / 2016 / 2017 Prius V:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Hybrid Control System: DTC Check / Clear”
© 2023 Toyota Motor Sales, USA
T-SB-0011-23
February 16, 2023
Page 7 of 8
MIL ON With DTCs P0A7A and/or P0A78
Repair Procedure (continued)
4. Repair the inverter assembly with converter.
NOTE
ALL repairs in this Service Bulletin require super long life coolant, an inverter drain plug kit,
and a gasket.
Toyota thermal grease is ONLY used for IPM replacement. This part has a shelf life of one year.
Do NOT use if stored past one year.
Reference the Quick Training Guide for best practices for 2010 – 2015 model year Prius and
2012 – 2017 model year Prius V vehicles.
Refer to TIS, applicable model and model year Repair Manual:
2010 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Power Module Intelligent Transistor: Removal / Installation”
2011 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Power Module Intelligent Transistor: Removal / Installation”
2012 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Power Module Intelligent Transistor: Removal / Installation”
2013 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Power Module Intelligent Transistor: Removal / Installation”
2014 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Power Module Intelligent Transistor: Removal / Installation”
2015 Prius:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Power Module Intelligent Transistor: Removal / Installation”
2012 Prius V:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Power Module Intelligent Transistor: Disassembly / Reassembly”
2013 Prius V:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Power Module Intelligent Transistor: Disassembly / Reassembly”
2014 Prius V:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Power Module Intelligent Transistor: Disassembly / Reassembly”
© 2023 Toyota Motor Sales, USA
T-SB-0011-23
February 16, 2023
Page 8 of 8
MIL ON With DTCs P0A7A and/or P0A78
Repair Procedure (continued)
2015 Prius V:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Power Module Intelligent Transistor: Disassembly / Reassembly”
2016 – 2017 Prius V:
Engine/Hybrid System – Hybrid/Battery Control System – “Hybrid / Battery Control:
Power Module Intelligent Transistor: Disassembly / Reassembly”
5. Clear ANY DTCs and confirm the condition is no longer present.
© 2023 Toyota Motor Sales, USA
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TSB/Document ID: TSB001123
Replacement Service Bulletin Number:
MFR Communication Date: 2023-02-16
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
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