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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 P1824: Transfer 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 TRANSFER MOTOR RELAY SIGNAL 

    With CONSULT 

    1. Start engine.
    2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT.
    3. Read out the value of MOTOR RELAY and MOTOR RELAY MON.
      Monitored item Condition Display value (Approx.)
      MOTOR RELAY
      • Accelerator pedal depressed
      • Vehicle stopped
      • Engine running
      • Brake pedal depressed
      		 4WD shift switch: 2WD OFF
      4WD shift switch: AUTO or 4LO (A/T selector lever P or N position) OFF (ON for approx. 2 sec. after shifting to P and N.)
      4WD shift switch: AUTO or 4LO (Except for A/T selector lever P or N position) ON
      4WD shift switch: 4H (A/T selector lever P position) OFF (ON for approx. 2 sec. after shifting to P.)
      4WD shift switch: 4H (Except for A/T selector lever P position) ON
      MOTOR RELAY MON
      • Accelerator pedal depressed
      • Vehicle stopped
      • Engine running
      • Brake pedal depressed
      		 4WD shift switch: 2WD OFF
      4WD shift switch: AUTO or 4LO (A/T selector lever P or N position) OFF (ON for approx. 2 sec. after shifting to P and N.)
      4WD shift switch: AUTO or 4LO (Except for A/T selector lever P or N position) ON
      4WD shift switch: 4H (A/T selector lever P position) OFF (ON for approx. 2 sec. after shifting to P.)
      4WD shift switch: 4H (Except for A/T selector lever P position) ON

    Without CONSULT 

    1. Start engine.
    2. Check voltage between transfer control unit harness connector terminal and ground.
      Fig 1: Checking Voltage Between Transfer Control Unit Harness Connector Terminal And Ground
      G04901534Courtesy of NISSAN NORTH AMERICA, INC.
      Connector Terminal Condition Voltage (Approx.)
      E142 14 - Ground
      • Accelerator pedal depressed
      • Vehicle stopped
      • Engine running
      • Brake pedal depressed
      		 4WD shift switch: 2WD Battery voltage
      4WD shift switch: AUTO or 4LO (A/T selector lever P or N position) Battery voltage (0V for approx. 2 sec. after shifting to P and N.)
      4WD shift switch: AUTO or 4LO (Except for A/T selector lever P or N position) 0V
      4WD shift switch: 4H (A/T selector lever P position) Battery voltage (0V for approx. 2 sec. after shifting to P.)
      4WD shift switch: 4H (Except for A/T selector lever P position) 0V
      E143 41 - Ground
      • Accelerator pedal depressed
      • Vehicle stopped
      • Engine running
      • Brake pedal depressed
      		 4WD shift switch: 2WD 0V
      4WD shift switch: AUTO or 4LO (A/T selector lever P or N position) 0V (Battery voltage for approx. 2 sec. after shifting to P and N.)
      4WD shift switch: AUTO or 4LO (Except for A/T selector lever P or N position) Battery voltage
      4WD shift switch: 4H (A/T selector lever P position) 0V (Battery voltage for approx. 2 sec. after shifting to P.)
      4WD shift switch: 4H (Except for A/T selector lever P position) Battery voltage

      Are the inspection results normal? 

      YES: GO TO  7.

      NO: GO TO 2.

  2. CHECK TRANSFER MOTOR RELAY POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
    2. Connect transfer control unit harness connector.
    3. Disconnect transfer motor relay.
    4. Check voltage between transfer motor relay harness connector terminals and ground.
      Connector Terminal Voltage (Approx.)
      E153 2 - Ground 0V
      E154 5 - Ground Battery voltage
    5. Turn ignition switch ON. (Do not start engine.)
    6. Check voltage between transfer motor relay harness connector terminals and ground.
      Connector Terminal Voltage (Approx.)
      E153 2 - Ground Battery voltage
      E154 5 - Ground

      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. 58 located in the fuse and relay box).
      • 10A fuse (No. 26 located in the fuse and fusible link box).
      • Harness for short or open between battery and transfer motor relay harness connector E154 terminal 5.
      • Harness for short or open between transfer shut off relay harness connector E69 terminal 3 and transfer motor relay harness connector E153 terminal 2.
      • Battery and ignition switch.
  3. CHECK TRANSFER MOTOR RELAY 
    1. Turn ignition switch OFF.
    2. Remove transfer motor relay. Refer to "COMPONENT PARTS LOCATION ".
    3. Apply 12V direct current between transfer motor relay terminals 1 and 2.
    4. Check continuity between relay terminals 3 and 5.
      Condition Continuity
      12V direct current supply between terminals 1 and 2 Yes
      OFF No
      Fig 2: Applying 12V Direct Current Between Transfer Motor Relay Terminals 1 And 2
      G04901537Courtesy of NISSAN NORTH AMERICA, INC.

      Are the inspection results normal? 

      YES: GO TO 4.

      NO: Replace the transfer motor relay.

  4. CHECK TRANSFER MOTOR CONTROL CIRCUIT 
    1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
    2. Remove transfer motor relay.
    3. Disconnect transfer control unit harness connector and transfer motor.
    4. Check continuity between the following terminals.
      • Transfer control unit harness connector E142 terminal 14 and transfer motor relay harness connector E153 terminal 1.
      • Transfer control unit harness connector E143 terminal 41 and transfer motor relay harness connector E154 terminal 3.
      • Transfer control unit harness connector E143 terminal 41 and transfer motor harness connector F57 terminal 14.

        Continuity should exist. 

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

      Are the inspection results normal? 

      YES: GO TO 5.

      NO: Repair or replace damaged parts.

      Fig 3: Checking Transfer Motor Control Circuit
      G04901539Courtesy of NISSAN NORTH AMERICA, INC.
  5. CHECK TRANSFER MOTOR GROUND CIRCUIT 
    1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
    2. Disconnect transfer motor harness connector.
    3. Check continuity between transfer motor harness connector F57 terminal 15 and ground.

      Continuity should exist. 

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

      Are the inspection results normal? 

      YES: GO TO 6.

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

      Fig 4: Checking Continuity Between Transfer Motor Harness Connector F57 Terminal 15 And Ground
      G04901540Courtesy of NISSAN NORTH AMERICA, INC.
  6. CHECK TRANSFER MOTOR 
    1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
    2. Disconnect transfer motor harness connector.
    3. Apply 12V direct current between transfer motor terminals 14 and 15.

      Does transfer motor operate? 

      YES: GO TO 7.

      NO: Replace transfer motor. Refer to "REMOVAL AND INSTALLATION ".

      Fig 5: Applying 12V Direct Current Between Transfer Motor Terminals 14 And 15
      G04901541Courtesy 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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