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Home >> Lexus >> 2009 >> LS 600hL >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Vehicle Control (Diagnostic Codes (P0A7A-324 - P1557-887)) >> Hybrid Control System >> DTC P0A7A-810: Generator Inverter Performance >> Procedure

DTC P0A7A-810: Generator Inverter Performance: Procedure

  1. CHECK DTC OUTPUT (HV) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
    4. Check if DTCs are output.

      Result

      Result Proceed to
      P3245-203 is not output. A
      P3245-203 is also output. B

    B → See step   6 

    A: Go to next step 

  2. CHECK DTC OUTPUT (HV) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
    4. Check if DTCs are output.

      Result

      Result Proceed to
      P0A7A-810 only is output. A
      Any of the following DTCs are also output. B
      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, 523, 586 Drive Motor "A" Inverter Performance
      P0A94-585, 587, 589, 590 DC / DC Converter Performance

      HINT: 

      • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic flowchart.
      • P0A7A-810 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.

    B → See step   4 

    A: Go to next step 

  3. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) 
    NOTE:

    Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector does not pull out.

    1. Check the connection of the low voltage connector of the inverter with converter assembly.
      Fig 1: Identifying Inverter With Converter Assembly
      GTY147638Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      The connector is connected securely and there are no contact problems.

      HINT: 

      When connecting the connector, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.

    NG → CONNECT SECURELY 

    OK → See step   5 

  4. GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
  5. REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  REMOVAL 
  6. GO TO DTC CHART. Refer to  DTC P3245-203: Short in Inverter Circuit 
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