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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 72 (Motor Generator Control System (AWD) - Diagnostic Codes (2 Of 5)) >> MOTOR GENERATOR CONTROL SYSTEM (for AWD) >> DTC P0A78-9E: Drive Motor "A" Inverter Stuck On; DTC P1C5D-19: Drive Motor "A" Inverter Circuit Current Above Threshold [12/2019 - 11/2023] >> Procedure

DTC P0A78-9E: Drive Motor "A" Inverter Stuck On; DTC P1C5D-19: Drive Motor "A" Inverter Circuit Current Above Threshold [12/2019 - 11/2023]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DTC OUTPUT (MOTOR GENERATOR) 
    1. Check for DTCs.

      Powertrain > Motor Generator > Trouble Codes 

      Result

      Result Proceed to
      P0A78-73 is not output. A
      P0A78-73 is also output. B
      NOTE:
      • If P0A78-73 is output, troubleshoot it first. After completing the troubleshooting for P0A78-73, perform troubleshooting for this DTC.
      • Parts repaired or replaced during troubleshooting for P0A78-73 do not need to be re-inspected in this diagnostic procedure.
    2. Turn the ignition switch off.

    Result: 

    B 

    See step  4

    Result: 

    A 

    See step  2

  2. CHECK DTC OUTPUT 
    1. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Powertrain > Motor Generator > Trouble Codes 

      Powertrain > Rear Motor Generator > Trouble Codes 

      Result

      Result Proceed to
      P0A78-9E or P1C5D-19 only is output, or DTCs except the ones in the table below are also output. A
      DTCs of hybrid control system in the tables below are output. B
      DTCs of motor generator control system in the tables below are output. C
      DTCs of rear motor generator control system in the tables below are output. D
      TABLE 1

      Malfunction Content System Relevant DTC
      Insulation Malfunction Hybrid control system P1C7C-49 Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure
      P1C7D-49 Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure
      P1C7E-49 Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure
      P1C7F-49 Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure
      P1C80-49 Hybrid/EV Battery Voltage System Isolation (Rear Motor Area) Internal Electronic Failure
      System Main Relay or High Voltage Circuit Malfunction Hybrid control system P0AD9-11 Hybrid/EV Battery Positive Contactor Circuit Short to Ground
      P0AD9-15 Hybrid/EV Battery Positive Contactor Circuit Short to Auxiliary Battery or Open
      P0ADD-11 Hybrid/EV Battery Negative Contactor Circuit Short to Ground
      P0ADD-15 Hybrid/EV Battery Negative Contactor Circuit Short to Auxiliary Battery or Open
      P1C84-49 High Voltage Power Resource Circuit Short during Ready ON
      HV Battery Malfunction Hybrid control system P0AFC-16 Hybrid/EV Battery Sensor Module Circuit Voltage Below Threshold
      P0AFC-96 Hybrid/EV Battery Sensor Module Component Internal Failure
      P1CBE-1E Hybrid/EV Battery Block 1 Voltage Difference Out of Range
      P1CBF-1E Hybrid/EV Battery Block 2 Voltage Difference Out of Range
      P1CC0-1E Hybrid/EV Battery Block 3 Voltage Difference Out of Range
      P1CC1-1E Hybrid/EV Battery Block 4 Voltage Difference Out of Range
      P1CC2-1E Hybrid/EV Battery Block 5 Voltage Difference Out of Range
      P1CC3-1E Hybrid/EV Battery Block 6 Voltage Difference Out of Range
      P1CC4-1E Hybrid/EV Battery Block 7 Voltage Difference Out of Range
      P1CC5-1E Hybrid/EV Battery Block 8 Voltage Difference Out of Range
      P1CC6-1E Hybrid/EV Battery Block 9 Voltage Difference Out of Range
      P1CC7-1E Hybrid/EV Battery Block 10 Voltage Difference Out of Range
      P1CFD-1E Hybrid/EV Battery Block 11 Voltage Difference Out of Range
      P1BF0-1E Hybrid/EV Battery Block 12 Voltage Difference Out of Range
      P3011-00 Hybrid/EV Battery Block 1 Circuit Resistance Out of Range (Extreme)
      P3012-00 Hybrid/EV Battery Block 2 Circuit Resistance Out of Range (Extreme)
      P3013-00 Hybrid/EV Battery Block 3 Circuit Resistance Out of Range (Extreme)
      P3014-00 Hybrid/EV Battery Block 4 Circuit Resistance Out of Range (Extreme)
      P3015-00 Hybrid/EV Battery Block 5 Circuit Resistance Out of Range (Extreme)
      P3016-00 Hybrid/EV Battery Block 6 Circuit Resistance Out of Range (Extreme)
      P3017-00 Hybrid/EV Battery Block 7 Circuit Resistance Out of Range (Extreme)
      P3018-00 Hybrid/EV Battery Block 8 Circuit Resistance Out of Range (Extreme)
      P3019-00 Hybrid/EV Battery Block 9 Circuit Resistance Out of Range (Extreme)
      P3020-00 Hybrid/EV Battery Block 10 Circuit Resistance Out of Range (Extreme)
      P3021-00 Hybrid/EV Battery Block 11 Circuit Resistance Out of Range (Extreme)
      P3022-00 Hybrid/EV Battery Block 12 Circuit Resistance Out of Range (Extreme)
      U029A-87 Lost Communication with Hybrid/EV Battery Sensor Module Missing Message
      TABLE 2

      Malfunction Content System Relevant DTC
      Microcomputer malfunction Motor generator control system P0A1A-47 Generator Control Module Watchdog / Safety MC Failure
      P0A1A-49 Generator Control Module Internal Electronic Failure
      P0A1B-1F Generator Control Module Circuit Intermittent
      P0A1C-47 Drive Motor "B" Control Module Watchdog / Safety MCU Failure
      P0A1C-49 Drive Motor "B" Control Module Internal Electronic Failure
      P1C2A-1C Generator A/D Converter Circuit Circuit Voltage Out of Range
      P1C2A-49 Generator A/D Converter Circuit Internal Electronic Failure
      P1C2B-1C Drive Motor "A" Control Module A/D Converter Circuit Voltage Out of Range
      P1C2B-49 Drive Motor "A" Control Module A/D Converter Circuit Internal Electronic Failure
      P1C2C-1C Drive Motor "B" Control Module AD Converter Circuit Voltage Out of Range
      P1C2C-49 Drive Motor "B" Control Module AD Converter Internal Electronic Failure
      P310A-83 Communication Error from Drive Motor "B" to Drive Motor "A" Value of Signal Protection Calculation Incorrect
      P310A-86 Communication Error from Drive Motor "B" to Drive Motor "A" Signal (Some Circuit Quantity, Reported via Serial Data) Invalid
      P310A-87 Communication Error from Drive Motor "B" to Drive Motor "A" Missing Message
      P310B-83 Communication Error from Drive Motor "A" to Drive Motor "B" Value of Signal Protection Calculation Incorrect
      P310B-86 Communication Error from Drive Motor "A" to Drive Motor "B" Signal (Some Circuit Quantity, Reported via Serial Data) Invalid
      P310B-87 Communication Error from Drive Motor "A" to Drive Motor "B" Missing Message
      P3133-83 Communication Error from Generator to Drive Motor "A" Value of Signal Protection Calculation Incorrect
      P3133-86 Communication Error from Generator to Drive Motor "A" Signal Invalid
      P3133-87 Communication Error from Generator to Drive Motor "A" Missing Message
      P3134-83 Communication Error from Drive Motor "A" to Generator Value of Signal Protection Calculation Incorrect
      P3134-86 Communication Error from Drive Motor "A" to Generator Signal Invalid
      P3134-87 Communication Error from Drive Motor "A" to Generator Missing Message
      P32BF-83 Lost Communication between Drive Motor "A" and "B" (Drive Motor "A") Value of Signal Protection Calculation Incorrect
      P32BF-86 Lost Communication between Drive Motor "A" and "B" (Drive Motor "A") Signal (Some Circuit Quantity, Reported via Serial Data) Invalid
      P32BF-87 Lost Communication between Drive Motor "A" and "B" (Drive Motor "A") Missing Message
      P32CF-83 Lost Communication between Drive Motor "A" and "B" (Drive Motor "B") Value of Signal Protection Calculation Incorrect
      P32CF-86 Lost Communication between Drive Motor "A" and "B" (Drive Motor "B") Signal (Some Circuit Quantity, Reported via Serial Data) Invalid
      P32CF-87 Lost Communication between Drive Motor "A" and "B" (Drive Motor "B") Missing Message
      Hybrid control system P0A1B-49 Drive Motor "A" Control Module Internal Electronic Failure
      Power source circuit malfunction Motor generator control system P06B0-1C Generator Control Module Position Sensor REF Power Source Circuit Voltage Out of Range
      P06D6-1C Generator Control Module Offset Power Circuit Voltage Out of Range
      P262C-1C Drive Motor "B" Control Module Offset Power Circuit Voltage Out of Range
      Communication malfunction Motor generator control system P3124-87 Lost Communication between Drive Motor "A" and HV ECU Missing Message
      Hybrid control system P3123-87 Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message
      Sensor and actuator circuit malfunction Motor generator control system P0A3F-16 Drive Motor "A" Position Sensor Circuit Voltage Below Threshold
      P0A3F-21 Drive Motor "A" Position Sensor Signal Amplitude < Minimum
      P0A3F-22 Drive Motor "A" Position Sensor Signal Amplitude > Maximum
      P0A45-16 Drive Motor "B" Position Sensor Circuit Voltage Below Threshold
      P0A45-21 Drive Motor "B" Position Sensor Signal Amplitude < Minimum
      P0A45-22 Drive Motor "B" Position Sensor Signal Amplitude > Maximum
      P0A4B-16 Generator Position Sensor Circuit Voltage Below Threshold
      P0A4B-21 Generator Position Sensor Signal Amplitude < Minimum
      P0A4B-22 Generator Position Sensor Signal Amplitude > Maximum
      P0A60-12 Drive Motor "A" Phase V Current (High Resolution) Circuit Short to Battery
      P0A60-14 Drive Motor "A" Phase V Current (High Resolution) Circuit Short to Ground or Open
      P0A60-1C Drive Motor "A" Phase V Current (High Resolution) Circuit Voltage Out of Range
      P0A63-12 Drive Motor "A" Phase W Current (High Resolution) Circuit Short to Battery
      P0A63-14 Drive Motor "A" Phase W Current (High Resolution) Circuit Short to Ground or Open
      P0A63-1C Drive Motor "A" Phase W Current (High Resolution) Circuit Voltage Out of Range
      P0BE5-12 Drive Motor "A" Phase U Current Sensor Circuit Short to Battery
      P0BE5-14 Drive Motor "A" Phase U Current Sensor Circuit Short to Ground or Open
      P0BE5-28 Drive Motor "A" Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BE9-12 Drive Motor "A" Phase V Current Sensor Circuit Short to Battery
      P0BE9-14 Drive Motor "A" Phase V Current Sensor Circuit Short to Ground or Open
      P0BE9-28 Drive Motor "A" Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BED-12 Drive Motor "A" Phase W Current Sensor Circuit Short to Battery
      P0BED-14 Drive Motor "A" Phase W Current Sensor Circuit Short to Ground or Open
      P0BED-28 Drive Motor "A" Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BF1-12 Drive Motor "B" Phase U Current Sensor Circuit Short to Battery
      P0BF1-14 Drive Motor "B" Phase U Current Sensor Circuit Short to Ground or Open
      P0BF1-28 Drive Motor "B" Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BF5-12 Drive Motor "B" Phase V Current Sensor Circuit Short to Battery
      P0BF5-14 Drive Motor "B" Phase V Current Sensor Circuit Short to Ground or Open
      P0BF5-28 Drive Motor "B" Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BF9-12 Drive Motor "B" Phase W Current Sensor Circuit Short to Battery
      P0BF9-14 Drive Motor "B" Phase W Current Sensor Circuit Short to Ground or Open
      P0BF9-28 Drive Motor "B" Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BFD-62 Drive Motor "A" Phase U-V-W Current Sensor Signal Compare Failure
      P0BFE-62 Drive Motor "B" Phase U-V-W Current Sensor Signal Compare Failure
      P0C50-13 Drive Motor "A" Position Sensor Circuit "A" Circuit Open
      P0C50-16 Drive Motor "A" Position Sensor Circuit "A" Circuit Voltage Below Threshold
      P0C50-17 Drive Motor "A" Position Sensor Circuit "A" Circuit Voltage Above Threshold
      P0C55-13 Drive Motor "B" Position Sensor Circuit "A" Circuit Open
      P0C55-16 Drive Motor "B" Position Sensor Circuit "A" Circuit Voltage Below Threshold
      P0C55-17 Drive Motor "B" Position Sensor Circuit "A" Circuit Voltage Above Threshold
      P0C5A-13 Drive Motor "A" Position Sensor Circuit "B" Circuit Open
      P0C5A-16 Drive Motor "A" Position Sensor Circuit "B" Circuit Voltage Below Threshold
      P0C5A-17 Drive Motor "A" Position Sensor Circuit "B" Circuit Voltage Above Threshold
      P0C5F-13 Drive Motor "B" Position Sensor Circuit "B" Circuit Open
      P0C5F-16 Drive Motor "B" Position Sensor Circuit "B" Circuit Voltage Below Threshold
      P0C5F-17 Drive Motor "B" Position Sensor Circuit "B" Circuit Voltage Above Threshold
      P0C64-13 Generator Position Sensor Circuit "A" Circuit Open
      P0C64-16 Generator Position Sensor Circuit "A" Circuit Voltage Below Threshold
      P0C64-17 Generator Position Sensor Circuit "A" Circuit Voltage Above Threshold
      P0C69-13 Generator Position Sensor Circuit "B" Circuit Open
      P0C69-16 Generator Position Sensor Circuit "B" Circuit Voltage Below Threshold
      P0C69-17 Generator Position Sensor Circuit "B" Circuit Voltage Above Threshold
      P0D2D-16 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Below Threshold
      P0D2D-17 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Above Threshold
      P0DFA-62 Generator Phase U-V-W Current Sensor Signal Compare Failure
      P0E00-12 Generator Phase U Current Sensor Circuit Short to Battery
      P0E00-14 Generator Phase U Current Sensor Circuit Short to Ground or Open
      P0E00-28 Generator Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0E04-12 Generator Phase V Current Sensor Circuit Short to Battery
      P0E04-14 Generator Phase V Current Sensor Circuit Short to Ground or Open
      P0E04-28 Generator Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0E08-12 Generator Phase W Current Sensor Circuit Short to Battery
      P0E08-14 Generator Phase W Current Sensor Circuit Short to Ground or Open
      P0E08-28 Generator Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0E31-16 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Below Threshold
      P0E31-17 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold
      P0E51-11 DC/DC Converter Current Sensor Circuit Short to Ground
      P0E51-15 DC/DC Converter Current Sensor Circuit Short to Battery or Open
      P0E51-28 DC/DC Converter Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P1CAC-49 Generator Position Sensor Internal Electronic Failure
      P1CAD-49 Drive Motor "A" Position Sensor Internal Electronic Failure
      P1CAE-49 Drive Motor "B" Position Sensor Internal Electronic Failure
      P1CAF-38 Generator Position Sensor REF Signal Cycle Malfunction Signal Frequency Incorrect
      P1CB0-38 Drive Motor "A" Position Sensor REF Signal Frequency Incorrect
      P1CB1-38 Drive Motor "B" Position Sensor REF Signal Frequency Incorrect
      P1CFF-62 Hybrid/EV Battery Current/DC/DC Converter Current Signal Compare Failure
      Rear motor generator control system P0A69-12 Drive Motor "B" Phase V Current (High Resolution) Circuit Short to Battery
      P0A69-14 Drive Motor "B" Phase V Current (High Resolution) Circuit Short to Ground or Open
      P0A69-1C Drive Motor "B" Phase V Current (High Resolution) Circuit Voltage Out of Range
      P0A6C-12 Drive Motor "B" Phase W Current (High Resolution) Circuit Short to Battery
      P0A6C-14 Drive Motor "B" Phase W Current (High Resolution) Circuit Short to Ground or Open
      P0A6C-1C Drive Motor "B" Phase W Current (High Resolution) Circuit Voltage Out of Range
      Hybrid control system P0C76-00 Hybrid/EV Battery System Discharge Time Too Long
      P0D2D-1C Drive Motor "A" Inverter Voltage Sensor Voltage Out of Range
      P0E31-1C Boosting Converter Voltage Sensor "A" Voltage Out of Range
      System malfunction Motor generator control system P0A90-00 Drive Motor "A" Performance
      P0A91-00 Drive Motor "B" Performance
      P0A92-00 Hybrid Generator Performance
      P0A94-9E DC/DC Converter Stuck On
      P0BFF-1D Drive Motor "A" Circuit Current Out of Range
      P0C02-1D Drive Motor "B" System Circuit Current Out of Range
      P0C19-00 Drive Motor "A" Execution Torque Performance
      P0C1A-00 Drive Motor "B" Execution Torque Performance
      P0CA3-00 DC/DC Converter Step Up Voltage Performance
      P0D33-19 DC/DC Converter Circuit Current Above Threshold
      P0E57-17 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold
      P1CB5-9E DC/DC Converter Voltage Sensor "A" (VL) Stuck On
      P314F-1F DC/DC Converter Voltage Sensor "A" (VL) Circuit Intermittent
      P3153-1D DC/DC Converter Current Sensor Circuit Current Out of Range
      Hybrid control system P0A93-00 Inverter "A" Cooling System Performance
      P0AA6-49 Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure
      P0C73-96 Motor Electronics Coolant Pump "A" Component Internal Failure
      P314A-31 Motor Electronics Coolant Pump "A" No Signal
      TABLE 3

      System Relevant DTC
      Motor generator control system P0A3F-1F Drive Motor "A" Position Sensor Circuit Intermittent
      P0A4B-1F Generator Position Sensor Circuit Intermittent
      P0A60-1F Drive Motor "A" Phase V Current (High Resolution) Circuit Intermittent
      P0A63-1F Drive Motor "A" Phase W Current (High Resolution) Circuit Intermittent
      P0BE5-1F Drive Motor "A" Phase U Current Sensor Circuit Intermittent
      P0BE9-1F Drive Motor "A" Phase V Current Sensor Circuit Intermittent
      P0BED-1F Drive Motor "A" Phase W Current Sensor Circuit Intermittent
      P0C50-1F Drive Motor "A" Position Sensor Circuit "A" Circuit Intermittent
      P0C5A-1F Drive Motor "A" Position Sensor Circuit "B" Circuit Intermittent
      P0C64-1F Generator Position Sensor Circuit "A" Circuit Intermittent
      P0C69-1F Generator Position Sensor Circuit "B" Circuit Intermittent
      P0D2D-1F Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Intermittent
      P0E00-1F Generator Phase U Current Sensor Circuit Intermittent
      P0E04-1F Generator Phase V Current Sensor Circuit Intermittent
      P0E08-1F Generator Phase W Current Sensor Circuit Intermittent
      P0E31-1F DC/DC Converter Voltage Sensor "A" (VL) Circuit Intermittent
      P0E51-1F DC/DC Converter Current Sensor Circuit Intermittent
      P1C60-1F Generator Control Module Position Sensor REF Power Source Circuit Intermittent
      P1C62-1F Generator Control Module Offset Power Circuit Intermittent
      P1C64-1F Generator Control Module Circuit Intermittent
      P1C65-1F Generator Control Module Circuit Intermittent
      P1C67-1F Drive Motor "A" Phase U-V-W Current Sensor Circuit Intermittent
      P1C69-1F Generator Phase U-V-W Current Sensor Circuit Intermittent
      P3124-1F Lost Communication between Drive Motor "A" and HV ECU Circuit Intermittent
      Rear motor generator control system P0A45-1F Drive Motor "B" Position Sensor Circuit Intermittent
      P0A69-1F Drive Motor "B" Phase V Current (High Resolution) Circuit Intermittent
      P0A6C-1F Drive Motor "B" Phase W Current (High Resolution) Circuit Intermittent
      P0C55-1F Drive Motor "B" Position Sensor Circuit "A" Circuit Intermittent
      P0C5F-1F Drive Motor "B" Position Sensor Circuit "B" Circuit Intermittent
      P1C63-1F Drive Motor "B" Control Module Offset Power Circuit Intermittent
      P1C66-1F Drive Motor "B" Control Module Circuit Intermittent
      P1C68-1F Drive Motor "B" Phase U-V-W Current Sensor Circuit Intermittent

      HINT: 

      • P0A78-9E or P1C5D-19 may be output as a result of the malfunctions indicated by the DTCs above.
        1. The chart above is listed in inspection order of priority.
        2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
      • If P0A78-9E is output, replace the inverter with converter assembly after completing repairs.
    2. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 09/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [09/2020 - 10/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 11/2023]

    Result: 

    C 

    GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM)  . Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 10/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 11/2023]

    Result: 

    D 

    GO TO DTC CHART (REAR MOTOR GENERATOR CONTROL SYSTEM) 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 11/2023]

    Result: 

    A 

    See step  3

  3. CHECK FREEZE FRAME DATA AND DIAGNOSIS RELATED INFORMATION 
    1. Read the diagnosis related information and freeze frame data of DTC P0A78-9E or P1C5D-19.

      Powertrain > Motor Generator > Utility 

      Tester Display
      Diagnosis Related Information

      Powertrain > Motor Generator > Trouble Codes 

      Result

      Result Proceed to
      DTC P3124-87 is listed in Diagnosis Related Information. A
      DTC P3124-87 is not listed in Diagnosis Related Information and the value of freeze frame data item Emergency Shutdown Signal is ON. B
      Other than above C
    2. Turn the ignition switch off.

    Result: 

    A 

    GO TO DTC CHART (P3124-87) 

    Refer to DTC P3124-1F: Lost Communication between Drive Motor "A" and HV ECU Circuit Intermittent; DTC P3124-87: Lost Communication between Drive Motor "A" and HV ECU Missing Message [12/2019 - 11/2023]

    Result: 

    B 

    GO TO DTC CHART (P321E-9F) 

    Refer to DTC P321E-9F: Motor/Generator Shutdown Signal Stuck Off [12/2019 - 11/2023]

    Result: 

    C 

    See step  6

  4. GO TO DTC CHART (P0A78-73) 

    Refer to DTC P0A78-73: Drive Motor "A" Inverter Actuator Stuck Closed [12/2019 - 11/2023]

    HINT: 

    After repairs have been completed, perform the next step.

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  5

  5. CHECK DTC OUTPUT 
    1. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Powertrain > Motor Generator > Trouble Codes 

      Powertrain > Rear Motor Generator > Trouble Codes 

      Result

      Result Proceed to
      P0A78-9E or P1C5D-19 only is output, or DTCs except the ones in the table below are also output. A
      DTCs of hybrid control system in the tables below are output. B
      DTCs of motor generator control system in the tables below are output. C
      DTCs of rear motor generator control system in the tables below are output. D
      Malfunction Content System Relevant DTC
      Microcomputer malfunction Motor generator control system P0A1A-47 Generator Control Module Watchdog / Safety MC Failure
      P0A1A-49 Generator Control Module Internal Electronic Failure
      P0A1B-1F Generator Control Module Circuit Intermittent
      P0A1C-47 Drive Motor "B" Control Module Watchdog / Safety MCU Failure
      P0A1C-49 Drive Motor "B" Control Module Internal Electronic Failure
      P1C2A-1C Generator A/D Converter Circuit Circuit Voltage Out of Range
      P1C2A-49 Generator A/D Converter Circuit Internal Electronic Failure
      P1C2B-1C Drive Motor "A" Control Module A/D Converter Circuit Voltage Out of Range
      P1C2B-49 Drive Motor "A" Control Module A/D Converter Circuit Internal Electronic Failure
      P1C2C-1C Drive Motor "B" Control Module AD Converter Circuit Voltage Out of Range
      P1C2C-49 Drive Motor "B" Control Module AD Converter Internal Electronic Failure
      P310A-83 Communication Error from Drive Motor "B" to Drive Motor "A" Value of Signal Protection Calculation Incorrect
      P310A-86 Communication Error from Drive Motor "B" to Drive Motor "A" Signal (Some Circuit Quantity, Reported via Serial Data) Invalid
      P310A-87 Communication Error from Drive Motor "B" to Drive Motor "A" Missing Message
      P310B-83 Communication Error from Drive Motor "A" to Drive Motor "B" Value of Signal Protection Calculation Incorrect
      P310B-86 Communication Error from Drive Motor "A" to Drive Motor "B" Signal (Some Circuit Quantity, Reported via Serial Data) Invalid
      P310B-87 Communication Error from Drive Motor "A" to Drive Motor "B" Missing Message
      P3133-83 Communication Error from Generator to Drive Motor "A" Value of Signal Protection Calculation Incorrect
      P3133-86 Communication Error from Generator to Drive Motor "A" Signal Invalid
      P3133-87 Communication Error from Generator to Drive Motor "A" Missing Message
      P3134-83 Communication Error from Drive Motor "A" to Generator Value of Signal Protection Calculation Incorrect
      P3134-86 Communication Error from Drive Motor "A" to Generator Signal Invalid
      P3134-87 Communication Error from Drive Motor "A" to Generator Missing Message
      P32BF-83 Lost Communication between Drive Motor "A" and "B" (Drive Motor "A") Value of Signal Protection Calculation Incorrect
      P32BF-86 Lost Communication between Drive Motor "A" and "B" (Drive Motor "A") Signal (Some Circuit Quantity, Reported via Serial Data) Invalid
      P32BF-87 Lost Communication between Drive Motor "A" and "B" (Drive Motor "A") Missing Message
      P32CF-83 Lost Communication between Drive Motor "A" and "B" (Drive Motor "B") Value of Signal Protection Calculation Incorrect
      P32CF-86 Lost Communication between Drive Motor "A" and "B" (Drive Motor "B") Signal (Some Circuit Quantity, Reported via Serial Data) Invalid
      P32CF-87 Lost Communication between Drive Motor "A" and "B" (Drive Motor "B") Missing Message
      Hybrid control system P0A1B-49 Drive Motor "A" Control Module Internal Electronic Failure
      Power source circuit malfunction Motor generator control system P06B0-1C Generator Control Module Position Sensor REF Power Source Circuit Voltage Out of Range
      P06D6-1C Generator Control Module Offset Power Circuit Voltage Out of Range
      P262C-1C Drive Motor "B" Control Module Offset Power Circuit Voltage Out of Range
      Communication malfunction Motor generator control system P3124-87 Lost Communication between Drive Motor "A" and HV ECU Missing Message
      Hybrid control system P3123-87 Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message
      Sensor and actuator circuit malfunction Motor generator control system P0A3F-16 Drive Motor "A" Position Sensor Circuit Voltage Below Threshold
      P0A3F-21 Drive Motor "A" Position Sensor Signal Amplitude < Minimum
      P0A3F-22 Drive Motor "A" Position Sensor Signal Amplitude > Maximum
      P0A45-16 Drive Motor "B" Position Sensor Circuit Voltage Below Threshold
      P0A45-21 Drive Motor "B" Position Sensor Signal Amplitude < Minimum
      P0A45-22 Drive Motor "B" Position Sensor Signal Amplitude > Maximum
      P0A4B-16 Generator Position Sensor Circuit Voltage Below Threshold
      P0A4B-21 Generator Position Sensor Signal Amplitude < Minimum
      P0A4B-22 Generator Position Sensor Signal Amplitude > Maximum
      P0A60-12 Drive Motor "A" Phase V Current (High Resolution) Circuit Short to Battery
      P0A60-14 Drive Motor "A" Phase V Current (High Resolution) Circuit Short to Ground or Open
      P0A60-1C Drive Motor "A" Phase V Current (High Resolution) Circuit Voltage Out of Range
      P0A63-12 Drive Motor "A" Phase W Current (High Resolution) Circuit Short to Battery
      P0A63-14 Drive Motor "A" Phase W Current (High Resolution) Circuit Short to Ground or Open
      P0A63-1C Drive Motor "A" Phase W Current (High Resolution) Circuit Voltage Out of Range
      P0BF1-12 Drive Motor "B" Phase U Current Sensor Circuit Short to Battery
      P0BF1-14 Drive Motor "B" Phase U Current Sensor Circuit Short to Ground or Open
      P0BF1-28 Drive Motor "B" Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BF5-12 Drive Motor "B" Phase V Current Sensor Circuit Short to Battery
      P0BF5-14 Drive Motor "B" Phase V Current Sensor Circuit Short to Ground or Open
      P0BF5-28 Drive Motor "B" Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BF9-12 Drive Motor "B" Phase W Current Sensor Circuit Short to Battery
      P0BF9-14 Drive Motor "B" Phase W Current Sensor Circuit Short to Ground or Open
      P0BF9-28 Drive Motor "B" Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BFD-62 Drive Motor "A" Phase U-V-W Current Sensor Signal Compare Failure
      P0BFE-62 Drive Motor "B" Phase U-V-W Current Sensor Signal Compare Failure
      P0C50-13 Drive Motor "A" Position Sensor Circuit "A" Circuit Open
      P0C50-16 Drive Motor "A" Position Sensor Circuit "A" Circuit Voltage Below Threshold
      P0C50-17 Drive Motor "A" Position Sensor Circuit "A" Circuit Voltage Above Threshold
      P0C55-13 Drive Motor "B" Position Sensor Circuit "A" Circuit Open
      P0C55-16 Drive Motor "B" Position Sensor Circuit "A" Circuit Voltage Below Threshold
      P0C55-17 Drive Motor "B" Position Sensor Circuit "A" Circuit Voltage Above Threshold
      P0C5A-13 Drive Motor "A" Position Sensor Circuit "B" Circuit Open
      P0C5A-16 Drive Motor "A" Position Sensor Circuit "B" Circuit Voltage Below Threshold
      P0C5A-17 Drive Motor "A" Position Sensor Circuit "B" Circuit Voltage Above Threshold
      P0C5F-13 Drive Motor "B" Position Sensor Circuit "B" Circuit Open
      P0C5F-16 Drive Motor "B" Position Sensor Circuit "B" Circuit Voltage Below Threshold
      P0C5F-17 Drive Motor "B" Position Sensor Circuit "B" Circuit Voltage Above Threshold
      P0C64-13 Generator Position Sensor Circuit "A" Circuit Open
      P0C64-16 Generator Position Sensor Circuit "A" Circuit Voltage Below Threshold
      P0C64-17 Generator Position Sensor Circuit "A" Circuit Voltage Above Threshold
      P0C69-13 Generator Position Sensor Circuit "B" Circuit Open
      P0C69-16 Generator Position Sensor Circuit "B" Circuit Voltage Below Threshold
      P0C69-17 Generator Position Sensor Circuit "B" Circuit Voltage Above Threshold
      P0D2D-16 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Below Threshold
      P0D2D-17 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Above Threshold
      P0DFA-62 Generator Phase U-V-W Current Sensor Signal Compare Failure
      P0E00-12 Generator Phase U Current Sensor Circuit Short to Battery
      P0E00-14 Generator Phase U Current Sensor Circuit Short to Ground or Open
      P0E00-28 Generator Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0E04-12 Generator Phase V Current Sensor Circuit Short to Battery
      P0E04-14 Generator Phase V Current Sensor Circuit Short to Ground or Open
      P0E04-28 Generator Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0E08-12 Generator Phase W Current Sensor Circuit Short to Battery
      P0E08-14 Generator Phase W Current Sensor Circuit Short to Ground or Open
      P0E08-28 Generator Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0E31-16 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Below Threshold
      P0E31-17 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold
      P0E51-11 DC/DC Converter Current Sensor Circuit Short to Ground
      P0E51-15 DC/DC Converter Current Sensor Circuit Short to Battery or Open
      P0E51-28 DC/DC Converter Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P1CAC-49 Generator Position Sensor Internal Electronic Failure
      P1CAD-49 Drive Motor "A" Position Sensor Internal Electronic Failure
      P1CAE-49 Drive Motor "B" Position Sensor Internal Electronic Failure
      P1CAF-38 Generator Position Sensor REF Signal Cycle Malfunction Signal Frequency Incorrect
      P1CB0-38 Drive Motor "A" Position Sensor REF Signal Frequency Incorrect
      P1CB1-38 Drive Motor "B" Position Sensor REF Signal Frequency Incorrect
      P1CFF-62 Hybrid/EV Battery Current/DC/DC Converter Current Signal Compare Failure
      Rear motor generator control system P0A69-12 Drive Motor "B" Phase V Current (High Resolution) Circuit Short to Battery
      P0A69-14 Drive Motor "B" Phase V Current (High Resolution) Circuit Short to Ground or Open
      P0A69-1C Drive Motor "B" Phase V Current (High Resolution) Circuit Voltage Out of Range
      P0A6C-12 Drive Motor "B" Phase W Current (High Resolution) Circuit Short to Battery
      P0A6C-14 Drive Motor "B" Phase W Current (High Resolution) Circuit Short to Ground or Open
      P0A6C-1C Drive Motor "B" Phase W Current (High Resolution) Circuit Voltage Out of Range
      Hybrid control system P0C76-00 Hybrid/EV Battery System Discharge Time Too Long
      P0D2D-1C Drive Motor "A" Inverter Voltage Sensor Voltage Out of Range
      P0E31-1C Boosting Converter Voltage Sensor "A" Voltage Out of Range
      System malfunction Motor generator control system P0A91-00 Drive Motor "B" Performance
      P0A92-00 Hybrid Generator Performance
      P0A94-9E DC/DC Converter Stuck On
      P0BFF-1D Drive Motor "A" Circuit Current Out of Range
      P0C02-1D Drive Motor "B" System Circuit Current Out of Range
      P0C19-00 Drive Motor "A" Execution Torque Performance
      P0C1A-00 Drive Motor "B" Execution Torque Performance
      P0CA3-00 DC/DC Converter Step Up Voltage Performance
      P0D33-19 DC/DC Converter Circuit Current Above Threshold
      P0E57-17 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold
      P1CB5-9E DC/DC Converter Voltage Sensor "A" (VL) Stuck On
      P314F-1F DC/DC Converter Voltage Sensor "A" (VL) Circuit Intermittent
      P3153-1D DC/DC Converter Current Sensor Circuit Current Out of Range
      Hybrid control system P0A93-00 Inverter "A" Cooling System Performance
      P0AA6-49 Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure
      P0C73-96 Motor Electronics Coolant Pump "A" Component Internal Failure
      P314A-31 Motor Electronics Coolant Pump "A" No Signal

      HINT: 

      • P0A78-9E or P1C5D-19 may be output as a result of the malfunctions indicated by the DTCs above.
        1. The chart above is listed in inspection order of priority.
        2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
      • If P0A78-9E is output, replace the inverter with converter assembly after completing repairs.
    2. Turn the ignition switch off.

    Result: 

    A 

    See step  3

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 09/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [09/2020 - 10/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 11/2023]

    Result: 

    C 

    GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM)  . Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 10/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 11/2023]

    Result: 

    D 

    GO TO DTC CHART (REAR MOTOR GENERATOR CONTROL SYSTEM) 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 11/2023]

  6. CHECK FREEZE FRAME DATA 
    1. Read the freeze frame data of DTC P0A78-9E or P1C5D-19

      Powertrain > Motor Generator > Trouble Codes 

      Result

      Result Proceed to
      Motor Inverter Temperature is 110°C (230°F) or more A
      Other than above B
    2. Turn the ignition switch off.

    Result: 

    B 

    See step  8

    Result: 

    A 

    See step  7

  7. CHECK COOLING SYSTEM 

    Refer to Cooling System [12/2019 - 10/2021] , or refer to Cooling System [10/2021 - 11/2023]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  8

  8. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) 

    Refer to PROCEDURE - Step 3

    Result

    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  9

  9. CHECK GENERATOR RESOLVER CIRCUIT 

    Refer to Generator Resolver Circuit [12/2019 - 11/2023]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  10

  10. CHECK MOTOR RESOLVER CIRCUIT 

    Refer to Motor Resolver Circuit [12/2019 - 11/2023]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  11

  11. CHECK REAR MOTOR RESOLVER CIRCUIT 

    Refer to Rear Motor Resolver Circuit [12/2019 - 11/2023]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  12

  12. CHECK GENERATOR HIGH-VOLTAGE CIRCUIT 

    Refer to Generator High-voltage Circuit [12/2019 - 11/2023]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  13

  13. CHECK MOTOR HIGH-VOLTAGE CIRCUIT 

    Refer to Motor High-voltage Circuit [12/2019 - 11/2023]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  14

  14. CHECK REAR MOTOR HIGH-VOLTAGE CIRCUIT 

    Refer to Rear Motor High-voltage Circuit [12/2019 - 11/2023]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  15

  15. CHECK INVERTER LOW-VOLTAGE CIRCUIT 

    Refer to Inverter Low-voltage Circuit [12/2019 - 11/2023]

    HINT: 

    If the "Inverter Low-voltage Circuit" inspection results are normal, perform the next step.

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    REPLACE INVERTER WITH CONVERTER ASSEMBLY 

    Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

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