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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 P17AA: Transfer Shift Motor Control Circuit High [08/2019 - ] >> Procedure

DTC P17AA: Transfer Shift Motor Control Circuit High [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.
      GTY879188Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below

      Standard Voltage

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

      Tester Connection Switch Condition Specified Condition
      F46-2 (HM1) or F46-6 (HM2) - Body ground Ignition switch ON Below 1 V
      TRANSFER SHIFT ACTUATOR ASSEMBLY (CENTER DIFFERENTIAL LOCK SHIFT MOTOR) SIDE

      Tester Connection Switch Condition Specified Condition
      F46-8 (TM1) or F46-7 (TM2) - Body ground Ignition switch ON Below 1 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to 4 Wheel Drive Control ECU)
      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.
      GTY944398Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the B47 transfer shift actuator assembly connector.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      F46-2 (HM1) or B47-8 (HM1) - Body ground Ignition switch ON Below 1 V
      F46-6 (HM2) or B47-7 (HM2) - Body ground Ignition switch ON Below 1 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to 4 Wheel Drive Control ECU)
      *b Front view of wire harness connector
      (to Transfer Shift Actuator Assembly)

    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.
      GTY920725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the B47 transfer shift actuator assembly connector.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      F46-8 (TM1) or B47-2 (TM1) - Body ground Ignition switch ON Below 1 V
      F46-7 (TM2) or B47-1 (TM2) - Body ground Ignition switch ON Below 1 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to 4 Wheel Drive Control ECU)
      *b Front view of wire harness connector
      (to Transfer Shift Actuator Assembly)

    Result: 

    OK 

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

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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