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DTC P0A7A-122: Generator Inverter Performance [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Check for DTCs.

      Result

      Result Proceed to
      P0A7A-122 is stored before any of the DTCs in the tables below are stored. A
      Any of the DTCs including pending DTCs in table 1 below are stored before P0A7A-122 is stored. B
      Any of the DTCs in table 2 below are stored before P0A7A-122 is stored. C
      TABLE 1

      DTC No. Relevant Diagnosis
      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
      P3004-803 High Voltage Power Resource
      TABLE 2

      DTC No. Relevant Diagnosis
      P3011-123, P3012-123, P3013-123, P0314-123, P3015-123, P3016-123, P0317-123, P3018-123, P3019-123, P3020-123, P3021-123, P3022-123, P3023-123, P3024-123, P3025-123, P3026-123, P3027-123 Battery Block # Becomes Weak
      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
      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
      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
      P0AFC-123 Hybrid Battery Pack Sensor Module
      P3065-123 Hybrid Battery Temperature Sensor Range/Performance Stuck "A"
      P308A-123 Hybrid Battery Voltage Sensor All Circuits Low

      HINT: 

      • Refer to the freeze frame data to determine the order in which the DTCs were stored.
      • P0A7A-122 may be stored due to a malfunction which also causes DTCs in the preceding tables to be stored. In this case, first troubleshoot the output DTCs in the preceding tables. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
    5. Turn the power switch off.

    B → See step   32 

    C → See step   35 

    A: Go to next step 

  2. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Check for DTCs.

      Result

      Result Proceed to
      P0A7A-203 is not output. A
      P0A7A-203 is also output. B
      NOTE:
      • If P0A7A-203 is output, troubleshoot it first. After completing the troubleshooting for P0A7A-203, return to perform troubleshooting for this DTC.
      • Parts repaired or replaced during troubleshooting for P0A7A-203 do not need to be re-inspected in this diagnosis procedure.
    5. Turn the power switch off.

    B → See step   30 

    A: Go to next step 

  3. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Check for DTCs.

      HINT: 

      • If P0A7A-203 was not output in step 2 of this diagnosis procedure, check Table 1 below.
      • If P0A7A-203 was output in step 2 of this diagnosis procedure, diagnose that DTC first, then check Table 2 below.

      Result

      Result Proceed to
      P0A7A-122 only is output, or DTCs except the ones in the tables below are also output. A
      Any of the following DTCs including pending 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
      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
      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
      P0A72 (all INF codes)*1 Generator Phase V Current
      P0A75 (all INF codes)*1 Generator Phase W Current
      P0A78-266, 267, 279, 287, 306, 503, 504, 505, 506, 586, 806, 807, 808 Drive Motor "A" Inverter Performance
      P0A7A-325, 344, 517, 518, 809, 810, 811 Generator Inverter Performance
      P0A90-509 Drive Motor "A" Performance
      P0A92-521 Hybrid Generator Performance
      P0A94-442, 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
      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
      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
      P0A72-333 Generator Phase V Current
      P0A75-341 Generator Phase W Current
      P0A78-266, 267, 279, 287, 306, 503, 504, 505, 506, 586, 806, 807, 808 Drive Motor "A" Inverter Performance
      P0A7A-325, 517, 518, 809, 810, 811 Generator Inverter Performance
      P0A90-509 Drive Motor "A" Performance
      P0A94-442, 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.
      • P0A7A-122 may be stored due to a malfunction which also causes DTCs in the preceding tables to be stored. In this case, first troubleshoot the output DTCs in the preceding tables. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
    5. Turn the power switch off.

    B → See step   38 

    A: Go to next step 

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

    NG → CONNECT SECURELY 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER). Refer to  PROCEDURE - Step 3 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. CHECK GENERATOR RESOLVER. Refer to  PROCEDURE - Step 4 

    NG → See step   19 

    OK: Go to next step 

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

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

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

    NG → See step   21 

    OK: Go to next step 

  9. CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION) See step   9 

    B → REPLACE MALFUNCTIONING PARTS 

    C → CONNECT SECURELY 

    A: Go to next step 

  10. CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION) See step   10 

    B → REPLACE MALFUNCTIONING PARTS 

    C → CONNECT SECURELY 

    A: Go to next step 

  11. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG1) See step   11 

    NG → See step   26 

    OK: Go to next step 

  12. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG2) See step   12 

    NG → See step   28 

    OK: Go to next step 

  13. CHECK FUSE (INV) See step   13 

    NG → See step   23 

    OK: Go to next step 

  14. 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 

  15. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY) See step   15 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  16. CHECK POWER MANAGEMENT CONTROL ECU See step   16 

    NG → See step   34 

    OK: Go to next step 

  17. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR). Refer to  PROCEDURE - Step 7 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  18. CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR). Refer to  PROCEDURE - Step 8 

    NG → CONNECT SECURELY 

    OK → See step   33 

  19. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR). Refer to  PROCEDURE - Step 9 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  20. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER). Refer to  PROCEDURE - Step 10 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   31 

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

    NG → CONNECT SECURELY 

    OK: Go to next step 

  22. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER). Refer to  PROCEDURE - Step 12 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   31 

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

    NG → See step   25 

    OK: Go to next step 

  24. REPLACE INVERTER WITH CONVERTER ASSEMBLY 

    Refer to COMPONENTS [08/2013 - ]

    NEXT → REPLACE FUSE (INV) 

  25. REPAIR OR REPLACE HARNESS OR CONNECTOR 

    NEXT → REPLACE FUSE (INV) 

  26. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION) See step   26 

    B → REPLACE MALFUNCTIONING PARTS 

    C → CONNECT SECURELY 

    A: Go to next step 

  27. CHECK GENERATOR CABLE See step   27 

    NG → See step   36 

    OK → See step   31 

  28. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR CABLE CONNECTION CONDITION) See step   28 

    B → REPLACE MALFUNCTIONING PARTS 

    C → CONNECT SECURELY 

    A: Go to next step 

  29. CHECK MOTOR CABLE See step   29 

    NG → See step   37 

    OK → See step   31 

  30. GO TO DTC CHART (P0A7A-203). Refer to  DTC P0A7A-203: Generator Inverter Performance [08/2013 - ]  
  31. REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  COMPONENTS [08/2013 - ] 
  32. GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ] 
  33. REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  COMPONENTS [08/2013 - ] 
  34. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to  COMPONENTS [08/2013 - ] 
  35. GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ] 
  36. REPLACE GENERATOR CABLE. Refer to  COMPONENTS [08/2013 - ] 
  37. REPLACE MOTOR CABLE. Refer to  COMPONENTS [08/2013 - ] 
  38. GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ] 
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