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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 77 (Motor Generator Control System (AWD) - Diagnostic Codes (5 Of 5)) >> MOTOR GENERATOR CONTROL SYSTEM (for AWD) >> DTC P1CAC-49: Generator Position Sensor Internal Electronic Failure; DTC P1C64-1F: Generator Control Module Circuit Intermittent; DTC P1CAF-38: Generator Position Sensor REF Signal Cycle Malfunction Signal Frequency Incorrect [12/2019 - 11/2023] >> Procedure

DTC P1CAC-49: Generator Position Sensor Internal Electronic Failure; DTC P1C64-1F: Generator Control Module Circuit Intermittent; DTC P1CAF-38: Generator Position Sensor REF Signal Cycle Malfunction Signal Frequency Incorrect [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
      P1CAC-49, P1CAF-38 or P1C64-1F only is output, or DTCs except the ones in the table below are also output. A
      Any of the following DTCs are also output. B
      Relevant DTC
      P0A3F-16 Drive Motor "A" Position Sensor Circuit Voltage Below Threshold
      P0A45-16 Drive Motor B" Position Sensor Circuit Voltage Below Threshold
      P0A4B-16 Generator Position Sensor Circuit Voltage Below 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
    2. Turn the ignition switch off.

    Result: 

    B 

    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: 

    A 

    See step  2

  2. 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  3

  3. CHECK GENERATOR RESOLVER CIRCUIT 

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

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  4

  4. CHECK MOTOR RESOLVER CIRCUIT 

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

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  5

  5. CHECK REAR MOTOR RESOLVER CIRCUIT 

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

    HINT: 

    If the "Rear Motor Resolver 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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