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Home >> Toyota >> 2022 >> 4Runner TRD Pro >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Transfer Case (VF4BM) - Diagnostic Codes & Circuit Tests) >> Transfer System >> DTC P17A9: Transfer Shift Motor Control Circuit Low [08/2019 - ] >> Procedure

DTC P17A9: Transfer Shift Motor Control Circuit Low [08/2019 - ]: Procedure

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  1. CHECK TRANSFER SHIFT ACTUATOR ASSEMBLY (HIGH-LOW TRANSFER SHIFT MOTOR OR CENTER DIFFERENTIAL LOCK SHIFT MOTOR) 
    1. Disconnect the F46 4 wheel drive control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      TRANSFER SHIFT ACTUATOR ASSEMBLY (HIGH-LOW TRANSFER SHIFT MOTOR) SIDE

      Tester Connection Condition Specified Condition
      F46-2 (HM1) or F46-6 (HM2) - Body ground Always 10 kΩ or higher
      TRANSFER SHIFT ACTUATOR ASSEMBLY (CENTER DIFFERENTIAL LOCK SHIFT MOTOR) SIDE

      Tester Connection Condition Specified Condition
      F46-8 (TM1) or F46-7 (TM2) - Body ground Always 10 kΩ or higher
      RESULT

      Result Proceed to
      OK A
      NG (transfer shift actuator assembly (high-low transfer shift motor) side) B
      NG (transfer shift actuator assembly (center differential lock shift motor) side) C

    Result: 

    A 

    REPLACE 4 WHEEL DRIVE CONTROL ECU. Refer to  REMOVAL [08/2015 - ] 

    Result: 

    C 

    See step  3

    Result: 

    B 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU AND TRANSFER SHIFT ACTUATOR ASSEMBLY (HIGH-LOW TRANSFER SHIFT MOTOR) - BODY GROUND) 
    1. Disconnect the F46 4 wheel drive control ECU connector.
    2. Disconnect the B47 transfer shift actuator assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F46-2 (HM1) or B47-8 (HM1) - Body ground Always 10 kΩ or higher
      F46-6 (HM2) or B47-7 (HM2) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY. Refer to  DISASSEMBLY [08/2015 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  3. CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU AND TRANSFER SHIFT ACTUATOR ASSEMBLY (CENTER DIFFERENTIAL LOCK SHIFT MOTOR) - BODY GROUND) 
    1. Disconnect the F46 4 wheel drive control ECU connector.
    2. Disconnect the B47 transfer shift actuator assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F46-8 (TM1) or B47-2 (TM1) - Body ground Always 10 kΩ or higher
      F46-7 (TM2) or B47-1 (TM2) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY. Refer to  DISASSEMBLY [08/2015 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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