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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 2239 (Transfer Case (ATX14B)) >> DTC/Circuit Diagnosis >> DTC P1824: Transfer Motor >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. 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.
      Connector Terminal Condition Voltage (Approx.)
      M152 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
      M153 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

      OK or NG 

      OK: GO TO  8.

      NG: GO TO 2.

      Fig 1: Checking Voltage Between Transfer Control Unit Harness Connector Terminal 14 And Ground
      G08165870Courtesy of NISSAN NORTH AMERICA, INC.
  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
      Fig 2: Checking Voltage Between Transfer Motor Relay Harness Connector Terminals And Ground
      G08165871Courtesy of NISSAN NORTH AMERICA, INC.
    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 Battery voltage
      Fig 3: Checking Voltage Between Transfer Motor Relay Harness Connector Terminals And Ground
      G08165872Courtesy of NISSAN NORTH AMERICA, INC.

      OK or NG 

      OK: GO TO 3.

      NG: Check the following. If any items are damaged, repair or replace damaged parts.

      • 20A fuse (No. 57, located in the fuse and relay box).
      • 10A fuse (No. 59, located in the fuse and relay box).
      • Harness for short or open between battery and transfer motor relay harness connector E154 terminals 5.
      • Harness for short or open between transfer shut off relay harness connector E155 terminal 5 and transfer motor relay harness connector E153 terminal 2.
      • Battery and ignition switch.
  3. CHECK TRANSFER MOTOR RELAY
    1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
    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 4: Checking Continuity Between Relay Terminals 3 And 5
      G08165873Courtesy of NISSAN NORTH AMERICA, INC.

      OK or NG 

      OK: GO TO 4.

      NG: Replace the transfer motor relay.

  4. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER MOTOR RELAY
    1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
    2. Disconnect transfer control unit harness connector.
    3. Remove transfer motor relay.
    4. Check continuity between the following terminals.
      • Transfer control unit harness connector M152 terminal 14 and transfer motor relay harness connector E154 terminal 1.

        Continuity should exist  .

        Fig 5: Checking Continuity Between Transfer Control Unit Connector Terminal 14 And Transfer Motor Relay Connector Terminal 1
        G08165874Courtesy of NISSAN NORTH AMERICA, INC.

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

      OK or NG 

      OK: GO TO 5.

      NG: Repair or replace damaged parts.

  5. CHECK TRANSFER MOTOR POWER SUPPLY CIRCUIT
    1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
    2. Disconnect transfer control unit harness connector and transfer motor harness connector.
    3. Remove transfer motor relay.
    4. Check continuity between the following terminals.
      • Transfer control unit harness connector M153 terminal 41 and transfer motor relay harness connector E154 terminal 3.
      • Transfer control unit harness connector M153 terminal 41 and transfer motor harness connector F57 terminal 14.

        Continuity should exist  .

        Fig 6: Checking Continuity Between Transfer Control Unit Connector, Transfer Motor Connector And Transfer Motor Relay Connector Terminals
        G08165875Courtesy of NISSAN NORTH AMERICA, INC.

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

      OK or NG 

      OK: GO TO 6.

      NG: Repair or replace damaged parts.

  6. 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  .

      Fig 7: Checking Continuity Between Transfer Motor Harness Connector F57 Terminal 15 And Ground
      G08165876Courtesy of NISSAN NORTH AMERICA, INC.

      Also check harness for short to power.

      OK or NG 

      OK: GO TO 7.

      NG: Repair open circuit or short to power in harness or connectors.

  7. 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 8.

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

      Fig 8: Applying 12V Direct Current Between Transfer Motor Terminals 14 And 15
      G08165877Courtesy of NISSAN NORTH AMERICA, INC.
  8. CHECK TRANSFER CONTROL UNIT

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

    OK or NG 

    OK: GO TO 9.

    NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.

  9. CHECK DTC

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

    OK or NG 

    OK: Inspection End.

    NG: Replace transfer control unit. Refer to "REMOVAL AND INSTALLATION ".

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