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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 910 (Transfer Case) >> DTC/Circuit Diagnosis >> DTC P1817: Actuator Motor >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

  1. CHECK ACTUATOR MOTOR SIGNAL 

    With CONSULT 

    1. Start engine.
    2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT.
    3. Read out the value of SHIFT ACT1, SHIFT AC MON1, SHIFT ACT2 and SHIFT AC MON2.
      Monitored item Condition Display value
      SHIFT ACT1
      • Vehicle stopped
      • Engine running
      • A/T selector lever N position
      • Brake pedal depressed
      		 4WD shift switch: 4H to 4LO (Wait function is operating.) ON
      Except the above OFF
      SHIFT AC MON1
      • Vehicle stopped
      • Engine running
      • A/T selector lever N position
      • Brake pedal depressed
      		 4WD shift switch: 4H to 4LO (Wait function is operating.) ON
      Except the above OFF
      SHIFT ACT2
      • Vehicle stopped
      • Engine running
      • A/T selector lever N position
      • Brake pedal depressed
      		 4WD shift switch: 4LO to 4H (Wait function is operating.) ON
      Except the above OFF
      SHIFT AC MON2
      • Vehicle stopped
      • Engine running
      • A/T selector lever N position
      • Brake pedal depressed
      		 4WD shift switch: 4LO to 4H (Wait function is operating.) ON
      Except the above OFF

    Without CONSULT 

    1. Start engine.
    2. Check voltage between transfer control unit harness connector terminal and ground.
      Connector Terminal Condition Voltage (Approx.)
      E142 4 - Ground
      • Vehicle stopped
      • Engine running
      • A/T selector lever N position
      • Brake pedal depressed
      		 4WD shift switch: 4H to 4LO (Wait function is operating.) Battery voltage
      Except the above 0V
      13 - Ground
      • Vehicle stopped
      • Engine running
      • A/T selector lever N position
      • Brake pedal depressed
      		 4WD shift switch: 4LO to 4H (Wait function is operating.) Battery voltage
      Except the above 0V
      E143 33 - Ground
      • Vehicle stopped
      • Engine running
      • A/T selector lever N position
      • Brake pedal depressed
      		 4WD shift switch: 4H to 4LO (Wait function is operating.) Battery voltage
      Except the above 0V
      42 - Ground
      • Vehicle stopped
      • Engine running
      • A/T selector lever N position
      • Brake pedal depressed
      		 4WD shift switch: 4LO to 4H (Wait function is operating.) Battery voltage
      Except the above 0V
      Fig 1: Checking Voltage Between Transfer Control Unit Harness Connector Terminal And Ground
      G04901490Courtesy of NISSAN NORTH AMERICA, INC.

      Are the inspection results normal? 

      YES: GO TO  7.

      NO: GO TO 2.

  2. CHECK ACTUATOR MOTOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
    2. Remove transfer shift high relay and transfer shift low relay.
    3. Check voltage between transfer shift high relay harness connector E46 terminal 5 (A), transfer shift low relay harness connector E47 terminal 5 (B) and ground.
      Connector Terminal Voltage (Approx.)
      A: E46 5 - Ground Battery voltage
      B: E47 5 - Ground
      Fig 2: Checking Voltage Between Transfer Shift High Relay Harness Connector E46 Terminal 5 (A) And Ground
      G04901491Courtesy of NISSAN NORTH AMERICA, INC.
    4. Turn ignition switch ON. (Do not start engine.)
    5. Check voltage between transfer shift high relay harness connector E46 terminal 5 (A), transfer shift low relay harness connector E47 terminal 5 (B) and ground.
      Connector Terminal Voltage (Approx.)
      A: E46 5 - Ground Battery voltage
      B: E47 5 - Ground
      Fig 3: Checking Voltage Between Transfer Shift High Relay Harness Connector E46 Terminal 5 (A) And Ground
      G04901492Courtesy of NISSAN NORTH AMERICA, INC.

      Are the inspection results normal? 

      YES: GO TO 3.

      NO: Check the following. If any items are damaged, repair or replace damaged parts.

      • 20A fuse (No. 57, located in the fuse and relay box).
      • Harness for short or open between battery, transfer shift high relay harness connector terminal 5 and transfer shift low relay harness connector terminal 5.
  3. CHECK ACTUATOR MOTOR GROUND CIRCUIT 
    1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
    2. Remove transfer shift high relay and transfer shift low relay. Refer to "COMPONENT PARTS LOCATION ".
    3. Check continuity between transfer shift high relay harness connector E46 terminals 2, 4 (A) and transfer shift low relay harness connector E47 terminals 2, 4 (B) and ground.

      Continuity should exist. 

      Also check harness for short to ground and short to power.

      Are the inspection results normal? 

      YES: GO TO 4.

      NO: Repair open circuit or short to ground or short to power in harness or connectors.

      Fig 4: Checking Continuity Between Transfer Shift High Relay Harness Connector E46 Terminals 2, 4 (A) And Ground
      G04901493Courtesy of NISSAN NORTH AMERICA, INC.
  4. CHECK TRANSFER SHIFT RELAY 
    1. Turn ignition switch OFF.
    2. Remove transfer shift high relay and transfer shift low relay. Refer to "COMPONENT PARTS LOCATION ".
    3. Apply 12V direct current between transfer shift relay terminals 1 and 2.
    4. Check continuity between relay terminals 3 and 4, 3 and 5.
      Terminal Condition Continuity
      3 - 4 12V direct current supply between terminals 1 and 2 No
      OFF Yes
      3 - 5 12V direct current supply between terminals 1 and 2 Yes
      OFF No
      Fig 5: Checking Continuity Between Relay Terminals 3 And 4, 3 And 5
      G04901494Courtesy of NISSAN NORTH AMERICA, INC.

      Are the inspection results normal? 

      YES: GO TO 5.

      NO: Replace the transfer shut off relay. Refer to "COMPONENT PARTS LOCATION ".

  5. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAY 
    1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
    2. Disconnect transfer control unit harness connector and the transfer control device (actuator motor) harness connector.
    3. Remove transfer shift high relay and transfer shift low relay.
    4. Check continuity between the following terminals.
      • Transfer control unit harness connector E143 terminal 33 and transfer control device (actuator motor) harness connector F58 terminal 21.
      • Transfer control unit harness connector E143 terminal 42 and transfer control device (actuator motor) harness connector F58 terminal 24.
        Fig 6: Checking Harness Between Transfer Control Unit And Shift Relay
        G04901495Courtesy of NISSAN NORTH AMERICA, INC.
      • Transfer control unit harness connector E142 terminal 4 (A) and transfer shift high relay harness connector E46 terminal 1 (B).
      • Transfer control unit harness connector E142 terminal 13 (A) and transfer shift low relay harness connector E47 terminal 1 (C).
        Fig 7: Checking Continuity Between Transfer Control Unit Harness Connector E142 Terminal 4 (A) And Connector E46 Terminal 1
        G04901496Courtesy of NISSAN NORTH AMERICA, INC.
      • Transfer control unit harness connector E143 terminal 33 (A) and transfer shift high relay harness connector E46 terminal 3 (B).
      • Transfer control unit harness connector E143 terminal 42 (A) and transfer shift low relay harness connector E47 terminal 3 (C).

        Continuity should exist. 

      Also check harness for short to ground and short to power.

      Fig 8: Checking Continuity Between Transfer Control Unit Harness Connector E143 Terminal 33 (A) And Connector E46 Terminal 3 (B)
      G04901497Courtesy of NISSAN NORTH AMERICA, INC.

      Are the inspection results normal? 

      YES: GO TO 6.

      NO: Repair or replace damaged parts.

  6. CHECK ACTUATOR MOTOR 
    1. Remove transfer control device. Refer to "REMOVAL AND INSTALLATION ".
    2. Check operation by applying battery voltage to transfer control device (actuator motor) terminals 21 and 24.
      CAUTION:
      • Do not operate actuator motor for more than 1 second.
      • Change the actuator motor position to HIGH when installing.
      • Be careful not to overheat the harness.
      Terminal Actuator motor
      21 (Battery voltage) - 24 (Ground) Clockwise rotation
      24 (Battery voltage) - 21 (Ground) Counterclockwise rotation
      Fig 9: Applying Battery Voltage To Transfer Control Device (Actuator Motor) Terminals 21 And 24
      G04901498Courtesy of NISSAN NORTH AMERICA, INC.
    3. Check resistance between transfer control device (actuator motor) terminals 21 and 24.

      21 - 24: Approx. 0.2 Ω 

      Are the inspection results normal? 

      YES: GO TO 7.

      NO: Replace transfer control device (actuator motor).

      Fig 10: Checking Resistance Between Transfer Control Device (Actuator Motor) Terminals 21 And 24
      G04901499Courtesy of NISSAN NORTH AMERICA, INC.
  7. CHECK TRANSFER CONTROL UNIT 

    Check transfer control unit input/output signal. Refer to "REFERENCE VALUE ".

    Are the inspection results normal? 

    YES: GO TO 8.

    NO: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.

  8. CHECK DTC 

    Perform the self-diagnosis, after driving a vehicle for a while.

    Are the inspection results normal? 

    YES: Inspection End.

    NO: Replace transfer control unit. Refer to "REMOVAL AND INSTALLATION ".

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