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Home >> Toyota >> 2012 >> Highlander Hybrid >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Vehicle Control System (Diagnostic Codes (P0A69-677 - P0A79-716)) (Hybrid) >> Hybrid Control System >> DTC P0A79-712: Drive Motor "B" Inverter Performance >> Procedure

DTC P0A79-712: Drive Motor "B" Inverter Performance: Procedure

  1. CHECK DTC OUTPUT (HV) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Check if DTCs are output.

      Result

      Result Proceed to
      P0A79-712 is set before any of the DTCs in the table below are set. A
      Any of the DTCs in the table below are set before P0A79-712 is set. B
      DTC No. Relevant Diagnosis
      P3011-123, P3012-123, P3013-123, P3014-123, P3015-123, P3016-123, P3017-123, P3018-123, P3019-123, P3020-123, P3021-123, P3022-123, P3023-123, P3024-123, P3025-123 Battery Block # Becomes Weak
      P0AFC-123 Hybrid Battery Pack Sensor Module
      P308A-123 Hybrid Battery Voltage Sensor All Circuits Low
      P0AC0-123 Hybrid Battery Pack Current Sensor Circuit Range / Performance
      P0AC1-123 Hybrid Battery Pack Current Sensor Circuit Low
      P0AC2-123 Hybrid Battery Pack Current Sensor Circuit High
      P0A9C-123 Hybrid Battery Temperature Sensor "A" Range / Performance
      P0A9D-123 Hybrid Battery Temperature Sensor "A" Circuit Low
      P0A9E-123 Hybrid Battery Temperature Sensor "A" Circuit High
      P0C6E-123 Hybrid Battery Temperature Sensor "A" / "B" Correlation
      P0AC6-123 Hybrid Battery Temperature Sensor "B" Range / Performance
      P0AC7-123 Hybrid Battery Temperature Sensor "B" Circuit Low
      P0AC8-123 Hybrid Battery Temperature Sensor "B" Circuit High
      P0ACB-123 Hybrid Battery Temperature Sensor "C" Range / Performance
      P0ACC-123 Hybrid Battery Temperature Sensor "C" Circuit Low
      P0ACD-123 Hybrid Battery Temperature Sensor "C" Circuit High
      P0C70-123 Hybrid Battery Temperature Sensor "C" / "D" Correlation
      P0AE9-123 Hybrid Battery Temperature Sensor "D" Range / Performance
      P0AEA-123 Hybrid Battery Temperature Sensor "D" Circuit Low
      P0AEB-123 Hybrid Battery Temperature Sensor "D" Circuit High
      P0BC3-123 Hybrid Battery Temperature Sensor "E" Range / Performance
      P0BC4-123 Hybrid Battery Temperature Sensor "E" Circuit Low
      P0BC5-123 Hybrid Battery Temperature Sensor "E" Circuit High
      P0C72-123 Hybrid Battery Temperature Sensor "E" / "F" Correlation
      P0C34-123 Hybrid Battery Temperature Sensor "F" Range / Performance
      P0C35-123 Hybrid Battery Temperature Sensor "F" Circuit Low
      P0C36-123 Hybrid Battery Temperature Sensor "F" Circuit High

      HINT: 

      P0A79-712 may be set due to a malfunction which also causes DTCs in the preceding table to be set. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.

    5. Turn the ignition switch off.

    B → See step   22 

    A: Go to next step 

  2. CHECK DTC OUTPUT (HV) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Check if DTCs are output.

      Result

      Result Proceed to
      P0A79-716 is not output. A
      P0A79-716 is also output. B
      NOTE:
      • If P0A79-716 is output, troubleshoot it first. After completing the troubleshooting for P0A79-716, return to perform troubleshooting for this DTC.
      • Parts repaired or replaced during troubleshooting for P0A79-716 do not need to be re-inspected in this diagnosis procedure.
    5. Turn the ignition switch off.

    B → See step   23 

    A: Go to next step 

  3. CHECK DTC OUTPUT (HV) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Check if DTCs are output.

      HINT: 

      • If P0A79-716 was not output in step 2 of this diagnosis procedure, check Table 1 below.
      • If P0A79-716 was output in step 2 of this diagnosis procedure, repair that DTC first, and then check Table 2 below.

      Result

      Result Proceed to
      P0A79-712 only is output. A
      Any of the following DTCs are also output. B
      TABLE 1

      DTC No. Relevant Diagnosis
      P0A1A (all INF codes)*1 Generator Control Module
      P0A1B (all INF codes)*1 Drive Motor "A" Control Module
      P0A1C (all INF codes)*1 Drive Motor "B" Control Module
      P0A1D (all INF codes)*1 Hybrid Powertrain Control Module
      P0A3F-243 Drive Motor "A" Position Sensor Circuit
      P0A40-500 Drive Motor "A" Position Sensor Circuit Range / Performance
      P0A41-245 Drive Motor "A" Position Sensor Circuit Low
      P0A45-669 Drive Motor "B" Position Sensor Circuit
      P0A46-671 Drive Motor "B" Position Sensor Circuit Range / Performance
      P0A47-670 Drive Motor "B" Position Sensor Circuit Low
      P0A4B-253 Generator Position Sensor Circuit
      P0A4C-513 Generator Position Sensor Circuit Range / Performance
      P0A4D-255 Generator Position Sensor Circuit Low
      P0A60 (all INF codes)*1 Drive Motor "A" Phase V Current
      P0A63 (all INF codes)*1 Drive Motor "A" Phase W Current
      P0A69 (all INF codes)*1 Drive Motor "B" Phase V Current
      P0A6C (all INF codes)*1 Drive Motor "B" Phase W Current
      P0A72 (all INF codes)*1 Generator Phase V Current
      P0A75 (all INF codes)*1 Generator Phase W Current
      P0A78-118, 119, 120, 266, 267, 279, 287, 306, 503, 504, 505, 506, 586, 806, 807, 808 Drive Motor "A" Inverter Performance
      P0A79-693, 694, 695, 704, 812, 813, 814 Drive Motor "B" Inverter Performance
      P0A7A-324, 325, 344, 517, 518, 809, 810, 811 Generator Inverter Performance
      P0A90-509 Drive Motor "A" Performance
      P0A91-702 Drive Motor "B" Performance
      P0A92-521 Hybrid Generator Performance
      P0A94-124, 125, 126, 169, 170, 171, 442, 547, 548, 549, 554, 555, 556, 585, 587, 589, 590 DC / DC Converter Performance
      P0ADB-227 Hybrid Battery Positive Contactor Control Circuit Low
      P0ADC-226 Hybrid Battery Positive Contactor Control Circuit High
      P0ADF-229 Hybrid Battery Negative Contactor Control Circuit Low
      P0AE0-228 Hybrid Battery Negative Contactor Control Circuit High
      P0C76-523 Hybrid Battery System Discharge Time Too Long
      P3004-803 High Voltage Power Resource
      TABLE 2

      DTC No. Relevant Diagnosis
      P0A1A (all INF codes)*1 Generator Control Module
      P0A1B (all INF codes)*1 Drive Motor "A" Control Module
      P0A1C (all INF codes)*1 Drive Motor "B" Control Module
      P0A1D (all INF codes)*1 Hybrid Powertrain Control Module
      P0A3F-243 Drive Motor "A" Position Sensor Circuit
      P0A40-500 Drive Motor "A" Position Sensor Circuit Range / Performance
      P0A41-245 Drive Motor "A" Position Sensor Circuit Low
      P0A45-669 Drive Motor "B" Position Sensor Circuit
      P0A46-671 Drive Motor "B" Position Sensor Circuit Range / Performance
      P0A47-670 Drive Motor "B" Position Sensor Circuit Low
      P0A4B-253 Drive Motor "B" Position Sensor Circuit Low
      P0A4C-513 Generator Position Sensor Circuit Range / Performance
      P0A4D-255 Generator Position Sensor Circuit Low
      P0A60 (all INF codes)*1 Drive Motor "A" Phase V Current
      P0A63 (all INF codes)*1 Drive Motor "A" Phase W Current
      P0A69-677 Drive Motor "B" Phase V Current
      P0A6C-678 Drive Motor "B" Phase W Current
      P0A72 (all INF codes)*1 Generator Phase V Current
      P0A75 (all INF codes)*1 Generator Phase W Current
      P0A78-118, 119, 120, 266, 267, 279, 287, 306, 503, 504, 505, 506, 586, 806, 807, 808 Drive Motor "A" Inverter Performance
      P0A79-693, 694, 695, 812, 813, 814 Drive Motor "B" Inverter Performance
      P0A7A-324, 325, 344, 517, 518, 809, 810, 811 Generator Inverter Performance
      P0A90-509 Drive Motor "A" Performance
      P0A92-521 Hybrid Generator Performance
      P0A94-124, 125, 126, 169, 170, 171, 442, 547, 548, 549, 554, 555, 556, 585, 587, 589, 590 DC / DC Converter Performance
      P0ADB-227 Hybrid Battery Positive Contactor Control Circuit Low
      P0ADC-226 Hybrid Battery Positive Contactor Control Circuit High
      P0ADF-229 Hybrid Battery Negative Contactor Control Circuit Low
      P0AE0-228 Hybrid Battery Negative Contactor Control Circuit High
      P0C76-523 Hybrid Battery System Discharge Time Too Long
      P3004-803 High Voltage Power Resource

      HINT: 

      • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
      • P0A79-712 may be set due to a malfunction which also causes DTCs in the preceding table to be set. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
    5. Turn the ignition switch off.

    B → See step   24 

    A: Go to next step 

  4. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR). Refer to  PROCEDURE - Step 2 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - REAR MOTOR RESOLVER). Refer to  PROCEDURE - Step 7 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. CHECK REAR MOTOR RESOLVER. Refer to  PROCEDURE - Step 8 

    NG → See step   14 

    OK: Go to next step 

  7. CHECK INVERTER WITH CONVERTER ASSEMBLY (REAR MOTOR CABLE CONNECTION CONDITION) See step   12 

    B → REPLACE MALFUNCTIONING PARTS 

    C → CONNECT SECURELY 

    A: Go to next step 

  8. CHECK REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY (MGR) See step   15 

    NG → See step   16 

    OK: Go to next step 

  9. CHECK FUSE (PCU) See step   13 

    NG → See step   19 

    OK: Go to next step 

  10. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY POWER SOURCE CIRCUIT) See step   14 

    NG → REPAIR OR REPLACE POWER SOURCE CIRCUIT 

    OK: Go to next step 

  11. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - INVERTER WITH CONVERTER) See step   15 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  12. CHECK HYBRID VEHICLE CONTROL ECU See step   16 

    NG → See step   29 

    OK: Go to next step 

  13. CHECK CONNECTOR CONNECTION CONDITION (REAR MOTOR RESOLVER CONNECTOR). Refer to  PROCEDURE - Step 11 

    NG → CONNECT SECURELY 

    OK → See step   25 

  14. CHECK CONNECTOR CONNECTION CONDITION (REAR MOTOR RESOLVER CONNECTOR). Refer to  PROCEDURE - Step 16 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  15. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - REAR MOTOR RESOLVER). Refer to  PROCEDURE - Step 17 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   26 

  16. CHECK REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY (REAR MOTOR CABLE CONNECTION CONDITION) See step   40 

    B → REPLACE MALFUNCTIONING PARTS 

    C → CONNECT SECURELY 

    A: Go to next step 

  17. CHECK NO. 3 WIRE FRAME (REAR MOTOR CABLE) See step   41 

    NG → See step   27 

    OK: Go to next step 

  18. CHECK EXTENSION WIRE ASSEMBLY See step   42 

    NG → See step   28 

    OK → See step   26 

  19. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - PCU FUSE) See step   23 

    NG → See step   21 

    OK: Go to next step 

  20. REPLACE INVERTER WITH CONVERTER ASSEMBLY See step   24 

    NEXT → REPLACE FUSE (PCU) 

  21. REPAIR OR REPLACE HARNESS OR CONNECTOR See step   25 

    NEXT → REPLACE FUSE (PCU) 

  22. GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
  23. GO TO DTC CHART. Refer to  DTC P0A79-716: Drive Motor "B" Inverter Performance  
  24. GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
  25. REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  REMOVAL 
  26. REPLACE REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY. Refer to  REMOVAL 
  27. REPLACE NO. 3 WIRE FRAME. Refer to  REMOVAL 
  28. REPLACE EXTENSION WIRE ASSEMBLY. Refer to  REMOVAL 
  29. REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL 
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