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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 2036 (Transfer Case) >> ATX14B >> Trouble Diagnosis For System >> Actuator Motor >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK ACTUATOR MOTOR SIGNAL 

    With CONSULT-II 

    1. Start engine.
    2. Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II.
    3. Read out the value of "SHIFT ACT1", "SHIFT AC MON1", "SHIFT ACT2" and "SHIFT AC MON2".
      DISPLAY VALUE CONDITION

      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
      Fig 1: Identifying CONSULT II DATA MONITOR Screen
      G04901489

    Without CONSULT-II 

    1. Start engine.
    2. Check voltage between transfer control unit harness connector terminal and ground.
      Fig 2: Checking Voltage Between Transfer Control Unit Harness Connector Terminal And Ground
      G04901490
      CONNECTOR TERMINAL VOLTAGE REFERENCE

      Connector Terminal Condition Voltage (Approx.)
      M152 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
      M153 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

    OK or NG 

    OK: GO TO  7.

    NG: 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, transfer shift low relay harness connector E47 terminal 5 and ground.
      CONNECTOR TERMINAL VOLTAGE REFERENCE

      Connector Terminal Voltage (Approx.)
      E46 5 - Ground Battery voltage
      E47 5 - Ground
      Fig 3: Checking Voltage Between Transfer Shift High Relay Connector Terminal, Transfer Shift Low Relay Connector Terminal And Ground
      G04910077
    4. Turn ignition switch "ON". (Do not start engine.)
    5. Check voltage between transfer shift high relay harness connector E46 terminal 5, transfer shift low relay harness connector E47 terminal 5 and ground.
      CONNECTOR TERMINAL VOLTAGE REFERENCE

      Connector Terminal Voltage (Approx.)
      E46 5 - Ground Battery voltage
      E47 5 - Ground
      Fig 4: Checking Voltage Between Transfer Shift High Relay Connector Terminal, Transfer Shift Low Relay Connector Terminal And Ground
      G04910078

    OK or NG 

    OK: GO TO 3.

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

    • 20A fuse [No. 58, located in the fuse block (J/B)]. Refer to "POWER SUPPLY ROUTING CIRCUIT ".
    • Harness for short or open between battery, transfer shift high harness connector terminal 5 and transfer shift low 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 "LOCATION OF ELECTRICAL PARTS ".
    3. Check continuity between transfer shift high relay harness connector E46 terminals 1 and 4, and transfer shift low relay harness connector E47 terminals 1 and 4 and ground.

      Continuity should exist. 

      Also check harness for short to power.

      Fig 5: Checking Continuity Between Transfer Shift High Relay Harness Connector E46 Terminals 1 And 4 And Ground
      G04910079

    OK or NG 

    OK: GO TO 4.

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

  4. CHECK TRANSFER SHIFT RELAYS 
    1. Turn ignition switch "OFF".
    2. Remove transfer shift high relay and transfer shift low relay. Refer to "LOCATION OF ELECTRICAL PARTS ".
    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.
      CONNECTOR TERMINAL CONTINUITY REFERENCE

      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
      G04898443

    OK or NG 

    OK: GO TO 5.

    NG: Replace the transfer shut off relay. Refer to "LOCATION OF ELECTRICAL PARTS ".

  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 M152 terminal 4 and transfer shift high relay harness connector E46 terminal 2.
      • Transfer control unit harness connector M152 terminal 13 and transfer shift low relay harness connector E47 terminal 2.
        Fig 7: Checking Continuity Between Transfer Control Unit Connector Terminal And Transfer Shift High / Low Relay Connector Terminal
        G04910081
      • Transfer control unit harness connector M153 terminal 33 and transfer shift high relay harness connector E46 terminal 3.
      • Transfer control unit harness connector M153 terminal 42 and transfer shift low relay harness connector E47 terminal 3.

        Continuity should exist. 

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

        Fig 8: Checking Continuity Between Transfer Control Unit Connector Terminal And Transfer Shift High / Low Relay Connector Terminal
        G04910082

    OK or NG 

    OK: GO TO 6.

    NG: Repair or replace damaged parts.

  6. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND ACTUATOR MOTOR 
    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 M153 terminal 33 and transfer control device (actuator motor) harness connector F58 terminal 21.
      • Transfer control unit harness connector M153 terminal 42 and transfer control device (actuator motor) harness connector F58 terminal 24.

        Continuity should exist. 

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

        Fig 9: Check Continuity Between Transfer Control Unit Terminal 33 And 42 And Transfer Control Device Terminal 21
        G04901495

    OK or NG 

    OK: GO TO 7.

    NG: Repair or replace damaged parts.

  7. 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.
      CONNECTOR TERMINAL VOLTAGE REFERENCE

      Terminal Actuator motor
      21 (Battery voltage) - 24 (Ground) Clockwise rotate
      24 (Battery voltage) - 21 (Ground) Counterclockwise rotate
    3. Check resistance between transfer control device (actuator motor) terminals 21 and 24.

      21 - 24 : Approx. 0.2 Ω 

      Fig 10: Checking Battery Voltage To Transfer Control Device (Actuator Motor) Terminals 21 And 24
      G04901498

    OK or NG 

    OK: GO TO 8.

    NG: Replace transfer control device (actuator motor). Refer to "REMOVAL AND INSTALLATION ".

    Fig 11: Checking Resistance Between Transfer Control Device (Actuator Motor) Terminals 21 And 24
    G04910085
  8. CHECK TRANSFER CONTROL UNIT 

    Check transfer control unit input/output signal. Refer to "TRANSFER CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES ".

    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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