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Home >> Toyota >> 2021 >> 4Runner TRD Off-Road >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Touch Select 2-4 And High-Low System (VF2CM) - Diagnostic Codes & Circuit Tests) >> Touch Select 2-4 And High-Low System >> DTC P17A9: Transfer Shift Motor Control Circuit Low [08/2019 - ] >> Procedure

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

WARNING: This page is about a different variant/trim than selected.
  1. CHECK ACTUATOR ASSEMBLY (TRANSFER SHIFT MOTOR OR A.D.D. 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 SIDE:

      Tester Connection Condition Specified Condition
      F46-8 (TM1) or F46-7 (TM2) - Body ground Always 10 kΩ or higher
      A.D.D. ACTUATOR (DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY) SIDE:

      Tester Connection Condition Specified Condition
      F46-2 (DM1) or F46-6 (DM2) - Body ground Always 10 kΩ or higher

      Result

      Result Proceed to
      OK A
      NG (transfer shift actuator assembly side) B
      NG (A.D.D. actuator (differential vacuum actuator assembly) side) C

    Result: 

    A 

    REPLACE 4 WHEEL DRIVE CONTROL ECU. Refer to  REMOVAL [08/2019 - ] 

    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 - BODY GROUND) 
    1. Disconnect the F46 4 wheel drive control ECU connector.
    2. Disconnect the B62 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 B62-2 (TM1) - Body ground Always 10 kΩ or higher
      F46-7 (TM2) or B62-1 (TM2) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY. Refer to  DISASSEMBLY [08/2019 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  3. CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU AND A.D.D. ACTUATOR (DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY) - BODY GROUND) 
    1. Disconnect the F46 4 wheel drive control ECU connector.
    2. Disconnect the D1 A.D.D. actuator (differential vacuum 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 (DM1) or D1-1 (DM1) - Body ground Always 10 kΩ or higher
      F46-6 (DM2) or D1-2 (DM2) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE A.D.D. ACTUATOR (DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY). Refer to  REMOVAL [08/2015 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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