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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1080 (Transfer Case (TX15B)) >> DTC/Circuit Diagnosis >> DTC P1817: Actuator 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 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", "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: 2WD to 4H or 4H to 4LO or 2WD to 4LO ON
      Except the above OFF
      SHIFT AC MON1 4WD shift switch: 2WD to 4H or 4H to 4LO or 2WD to 4LO ON
      Except the above OFF
      SHIFT ACT2 4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WD ON
      Except the above OFF
      SHIFT AC MON2 4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WD ON
      Except the above OFF

    Without CONSULT 

    1. Start engine.
    2. Depress brake pedal and stop vehicle.
    3. Set A/T selector lever to "N" position.
    4. Check voltage between transfer control unit harness connector terminal and ground.
      Connector Terminal Condition Voltage (Approx.)
      M165 28 - Ground When 4WD shift switch is operated (While actuator motor is operating.) Battery voltage → 0V
      When 4WD shift switch is not operated 0V
      31 - Ground Always 0V
      42 - Ground
      • Vehicle stopped
      • Engine running
      • A/T selector lever "N" position
      • Brake pedal depressed
      		 4WD shift switch: 2WD to 4H or 4H to 4LO or 2WD to 4LO 0V
      Except the above Battery voltage
      M165 47 - Ground
      • Vehicle stopped
      • Engine running
      • A/T selector lever "N" position
      • Brake pedal depressed
      		 4WD shift switch: 2WD to 4H or 4H to 4LO or 2WD to 4LO Battery voltage → 0V
      Except the above 0V
      48 - Ground 4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WD Battery voltage → 0V
      Except the above 0V
      50 - Ground 4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WD 0V
      Except the above Battery voltage
      Fig 1: Checking Voltage Between Transfer Control Unit Connector Terminal And Ground
      G04898438Courtesy of NISSAN NORTH AMERICA, INC.

      Are the inspection results normal? 

      YES: GO TO  9.

      NO: GO TO 2.

  2. CHECK ACTUATOR MOTOR POWER SUPPLY CIRCUIT
    1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
    2. Disconnect transfer control unit harness connector.
    3. Check voltage between transfer control unit harness connector terminal 27 and ground.
      Connector Terminal Voltage (Approx.)
      M165 27 - Ground 0V
      Fig 2: Checking Voltage Between Transfer Control Unit Connector Terminal 27 And Ground
      G04898439Courtesy of NISSAN NORTH AMERICA, INC.
    4. Turn ignition switch "ON".
    5. Check voltage between transfer control unit harness connector terminal 27 and ground.
      Connector Terminal Voltage (Approx.)
      M165 27 - Ground Battery voltage
      Fig 3: Checking Voltage Between Transfer Control Unit Connector Terminal 27 And Ground
      G04898440Courtesy of NISSAN NORTH AMERICA, INC.

      Are the inspection results normal? 

      YES: GO TO 3.

      NO >>

      1. Check harness for short or open between transfer control unit harness connector M165 terminal 27 and transfer shut off relay 2 harness connector E157 terminal 5 and 10A fuse (No. 57, located in the fuse and relay block). If any items are damaged, repair or replace damaged parts.
      2. Perform trouble diagnosis for power supply circuit. Refer to "DIAGNOSIS PROCEDURE ".
  3. CHECK TRANSFER RELAY 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. Refer to "COMPONENT PARTS LOCATION ".
    3. Check voltage between transfer shift high and transfer shift low relay connector terminals and ground.
      Connector Terminal Voltage (Approx.)
      E44 2 - Ground 0V
      E43 2 - Ground 0V
      Fig 4: Checking Voltage Between Transfer Shift High And Low Relay Connector Terminals And Ground
      G04898441Courtesy of NISSAN NORTH AMERICA, INC.
    4. Turn ignition switch "ON". (Do not start engine.)
    5. Check voltage between transfer shift high and transfer shift low relay connector terminals and ground.
      Connector Terminal Voltage (Approx.)
      E44 2 - Ground Battery voltage
      E43 2 - Ground Battery voltage
      Fig 5: Checking Voltage Between Transfer Shift High And Low Relay Connector Terminals And Ground
      G04898442Courtesy of NISSAN NORTH AMERICA, INC.

      Are the inspection results normal? 

      YES: GO TO 4.

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

      • Harness for short or open between transfer control unit harness connector terminal 27 and transfer shift high relay harness connector E44 terminal 2.
      • Harness for short or open between transfer control unit harness connector terminal 27 and transfer shift low relay harness connector terminal E43 terminal 2.
  4. CHECK TRANSFER RELAY
    1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
    2. Remove transfer shift high relay and transfer shift low relay.
    3. Apply 12V direct current between transfer shift high and low 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 6: Checking Continuity Between Relay Terminals 3 And 4, 3 And 5
      G04898443Courtesy of NISSAN NORTH AMERICA, INC.

      Are the inspection results normal? 

      YES: GO TO 5.

      NO: Replace the transfer shift high or low relay.

  5. CHECK (1): 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.
    3. Remove transfer shift high relay and transfer shift low relay.
    4. Check continuity between the following terminals.
      • Transfer control unit harness connector M165 terminal 42 and transfer shift high relay harness connector E44 terminal 1.
      • Transfer control unit harness connector M165 terminal 50 and transfer shift low relay harness connector E43 terminal 1.

      Continuity should exist  .

      Fig 7: Checking Continuity Between Transfer Control Unit And Transfer Shift Relay Connector Terminals
      G04898444Courtesy of NISSAN NORTH AMERICA, INC.

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

      Is there continuity? 

      YES: GO TO 6.

      NO: Repair or replace damaged parts.

  6. CHECK (2): 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.
    3. Remove transfer shift high relay and transfer shift low relay.
    4. Check continuity between the following terminals.
      • Transfer control unit harness connector M165 terminal 28 and transfer shift high relay harness connector E44 terminal 5.
      • Transfer control unit harness connector M165 terminal 28 and transfer shift low relay harness connector E43 terminal 5.
      • Transfer control unit harness connector M165 terminal 31 and transfer shift high relay harness connector E44 terminal 4.
      • Transfer control unit harness connector M165 terminal 31 and transfer shift low relay harness connector E43 terminal 4.

      Continuity should exist  .

      Fig 8: Checking Continuity Between Transfer Control Unit And Transfer Shift Relay Connector Terminals
      G04898445Courtesy of NISSAN NORTH AMERICA, INC.

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

      Is there continuity? 

      YES: GO TO 7.

      NO: Repair or replace damaged parts.

  7. CHECK ACTUATOR MOTOR OPERATION CIRCUIT
    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. Check continuity between the following terminals.
      • Transfer control unit harness connector M165 terminal 47 and transfer control device (actuator motor) harness connector F72 terminal 23.
      • Transfer control unit harness connector M165 terminal 48 and transfer control device (actuator motor) harness connector F72 terminal 24.
        Fig 9: Checking Continuity Between Transfer Control Unit Connector And Transfer Control Device (Actuator Motor) Connector
        G04898446Courtesy of NISSAN NORTH AMERICA, INC.
      • Transfer control device (actuator motor) harness connector F72 terminal 24 and transfer shift high relay harness connector E44 terminal 3.
      • Transfer control device (actuator motor) harness connector F72 terminal 23 and transfer shift low relay harness connector E43 terminal 3.

      Continuity should exist  .

      Fig 10: Checking Continuity Between Transfer Control Device (Actuator Motor) Connector And Transfer Shift Relay Connector
      G04898447Courtesy of NISSAN NORTH AMERICA, INC.

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

      Is there continuity? 

      YES: GO TO 8.

      NO: Repair or replace damaged parts.

  8. 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 23 and 24.
      CAUTION: Be careful not to overheat the harness.
      Terminal Actuator motor
      24 (Battery voltage) - 23 (Ground) Clockwise rotate
      23 (Battery voltage) - 24 (Ground) Counterclockwise rotate
      Fig 11: Applying Battery Voltage To Transfer Control Device (Actuator Motor) Terminals 23 And 24
      G04898448Courtesy of NISSAN NORTH AMERICA, INC.

      Does actuator motor rotate? 

      YES: GO TO 9.

      NO: Replace transfer control device (actuator motor).

  9. CHECK TRANSFER CONTROL UNIT

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

    Are the inspection results normal? 

    YES: GO TO 10.

    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.

  10. CHECK DTC

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

    Is DTC P1817 displayed? 

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

    NO: Inspection End.

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