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Shift Motor Circuit [08/2019 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CONFIRM PROBLEM SYMPTOM 
    1. Confirm the problem symptoms.
      RESULT

      Result Proceed to
      The 4LO indicator light continues to blink after operation of the transfer position switch A
      The center differential lock indicator light continues to blink after operation of the transfer position switch B

      Blinking: Blinks at 0.5 second intervals (0.5 seconds on and 0.5 seconds off)

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  2

  2. INSPECT TRANSFER SHIFT ACTUATOR ASSEMBLY (HIGH-LOW TRANSFER SHIFT MOTOR) 
    GTY931217Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the B47 transfer shift actuator assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      8 (HM1) - 7 (HM2) Always 1.5 to 100 Ω
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Transfer Shift Actuator Assembly)

    Result: 

    NG 

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

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - TRANSFER SHIFT ACTUATOR ASSEMBLY (HIGH-LOW TRANSFER SHIFT MOTOR) 
    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) - B47-8 (HM1) Always Below 1 Ω
      F46-6 (HM2) - B47-7 (HM2) Always Below 1 Ω
      F46-2 (HM1) or B47-8 (HM1) - F46-6 (HM2) or B47-7 (HM2) Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - TRANSFER SHIFT ACTUATOR ASSEMBLY (HIGH-LOW TRANSFER LIMIT SWITCH) 
    1. Disconnect the F47 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
      F47-8 (HL1) - B47-12 (HL1) Always Below 1 Ω
      F47-7 (HL2) - B47-11 (HL2) Always Below 1 Ω
      B47-10 (GND) - Body ground Always Below 1 Ω
      F47-8 (HL1) or B47-12 (HL1) - Body ground Always 10 kΩ or higher
      F47-7 (HL2) or B47-11 (HL2) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. INSPECT TRANSFER SHIFT ACTUATOR ASSEMBLY (HIGH -LOW TRANSFER LIMIT SWITCH) 
    1. Remove the transfer shift actuator assembly.

      Refer to REMOVAL [08/2015 - ]

    2. Check the high-low transfer limit switch of the transfer shift actuator assembly.

      Refer to INSPECTION [08/2019 - ]

      OK

      The high-low transfer limit switch of the transfer shift actuator assembly is normally.

    Result: 

    OK 

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

    Result: 

    NG 

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

  6. INSPECT TRANSFER SHIFT ACTUATOR ASSEMBLY (CENTER DIFFERENTIAL LOCK SHIFT MOTOR) 
    GTY861030Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the B47 transfer shift actuator assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      2 (TM1) - 1 (TM2) Always 1.5 to 100 Ω
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Transfer Shift Actuator Assembly)

    Result: 

    NG 

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

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - TRANSFER SHIFT ACTUATOR ASSEMBLY (CENTER DIFFERENTIAL LOCK SHIFT MOTOR)) 
    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) - B47-2 (TM1) Always Below 1 Ω
      F46-7 (TM2) - B47-1 (TM2) Always Below 1 Ω
      F46-8 (TM1) or B47-2 (TM1) - F46-7 (TM2) or B47-1 (TM2) Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - TRANSFER SHIFT ACTUATOR ASSEMBLY (CENTER DIFFERENTIAL LOCK LIMIT SWITCH AND CENTER DIFFERENTIAL LOCK DETECTION SWITCH)) 
    1. Disconnect the F47 4 wheel drive control ECU connector.
    2. Disconnect the B47 transfer shift actuator assembly connector.
    3. Disconnect the A6 skid control ECU (master cylinder solenoid) connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F47-10 (TL2) - B47-4 (TL2) Always Below 1 Ω
      F47-9 (TL3) - B47-5 (TL3) Always Below 1 Ω
      F47-3 (P1) - B47-9 (CDL) Always Below 1 Ω
      B47-6 (GND1) - Body ground Always Below 1 Ω
      B47-10 (GND) - Body ground Always Below 1 Ω
      F47-10 (TL2) or B47-4 (TL2) - Body ground Always 10 kΩ or higher
      F47-9 (TL3) or B47-5 (TL3) - Body ground Always 10 kΩ or higher
      F47-3 (P1) or B47-9 (CDL) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  9

  9. INSPECT TRANSFER SHIFT ACTUATOR ASSEMBLY (CENTER DIFFERENTIAL LOCK LIMIT SWITCH AND CENTER DIFFERENTIAL LOCK DETECTION SWITCH) 
    1. Remove the transfer shift actuator assembly.

      Refer to REMOVAL [08/2015 - ]

    2. Check the center differential lock limit switch and center differential lock detection switch of the transfer shift actuator assembly.

      Refer to INSPECTION [08/2019 - ]

      OK

      The center differential lock limit switch and center differential lock detection switch of the transfer shift actuator assembly is normally.

    Result: 

    OK 

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

    Result: 

    NG 

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

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