LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1679 (Transfer Case) >> Trouble Diagnosis For System >> 4WD Shift Switch >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2006 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK 4WD SHIFT SWITCH SIGNAL 
    1. With CONSULT-II
    2. Turn ignition switch "ON".
    3. Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II.
    4. Read out ON/OFF switching action of the "2WD SWITCH", "4H SWITCH", "4L SWITCH" with operating 4WD shift switch.
      Fig 1: CONSULT-II Display - DATA MONITOR
      G04186359Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

    1. Turn ignition switch "ON".
    2. Check voltage between transfer control unit harness connector terminals and ground.
      Fig 2: Checking Voltage Between Transfer Control Unit Harness Connector Terminals And Ground
      G04186360Courtesy of NISSAN MOTOR CO., U.S.A.
      TERMINALS VOLTAGE REFERENCE

      Connector Terminal Condition Voltage (Approx.)
      E142 14 - Ground 4WD shift switch: 2WD Battery voltage
      4WD shift switch: 4H and 4LO 0V
      15 - Ground 4WD shift switch: 4H Battery voltage
      4WD shift switch: 2WD and 4LO 0V
      16 - Ground 4WD shift switch: 4LO Battery voltage
      4WD shift switch: 2WD and 4H 0V

    OK or NG 

    OK: GO TO  5.

    NG: GO TO 2.

  2. CHECK 4WD SHIFT SWITCH POWER SUPPLY CIRCUIT 
    1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
    2. Disconnect 4WD shift switch harness connector.
    3. Check voltage between 4WD shift switch harness connector terminal 1 and ground.
      Fig 3: Checking Voltage Between 4WD Shift Switch Harness Connector Terminal 1 And Ground
      G04186361Courtesy of NISSAN MOTOR CO., U.S.A.
      TERMINALS VOLTAGE REFERENCE

      Connector Terminal Voltage (Approx.)
      M141 1 - Ground 0V
    4. Turn ignition switch "ON". (Do not start engine.)
    5. Check voltage between 4WD shift switch harness connector terminal 1 and ground.
      Fig 4: Checking Voltage Between 4WD Shift Switch Harness Connector Terminal 1 And Ground
      G04186362Courtesy of NISSAN MOTOR CO., U.S.A.
      TERMINALS VOLTAGE REFERENCE

      Connector Terminal Voltage (Approx.)
      M141 1 - Ground Battery voltage

    OK or NG 

    OK: GO TO 3.

    NG:

    1. Check harness for short or open between 4WD shift switch harness connector terminal 1 and transfer shutoff relay 2 harness connector E47 terminal 3 and 10A fuse (No. 26 located in the fuse and fusible link box). If any items are damaged, repair or replace damaged parts.
    2. Perform trouble diagnosis for power supply circuit. Refer to "POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT ".
  3. CHECK HARNESS BETWEEN 4WD SHIFT SWITCH AND TRANSFER CONTROL UNIT 
    1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
    2. Disconnect transfer control unit harness connector and the 4WD shift switch harness connector.
    3. Check continuity between the following terminals.
      • Transfer control unit harness connector E142 terminal 14 and 4WD shift switch harness connector M141 terminal 3.
      • Transfer control unit harness connector E142 terminal 15 and 4WD shift switch harness connector M141 terminal 5.
      • Transfer control unit harness connector E142 terminal 16 and 4WD shift switch harness connector M141 terminal 6.

        Continuity should exist. 

        Fig 5: Checking Continuity Between Transfer Control Unit Connector E142 Terminal 14, 15, 16 And 4WD Shift Switch Connector M141 Terminal 3, 5, 6
        G04186363Courtesy of NISSAN MOTOR CO., U.S.A.

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

    OK or NG 

    OK: GO TO 4.

    NG: Repair or replace damaged parts.

  4. CHECK 4WD SHIFT SWITCH 
    1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
    2. Remove 4WD shift switch harness connector.
    3. Operate 4WD shift switch and check continuity between 4WD shift switch terminals.
      Fig 6: Checking Continuity Between 4WD Shift Switch Terminals
      G04186364Courtesy of NISSAN MOTOR CO., U.S.A.
      TERMINALS CONTINUITY REFERENCE

      Terminal Condition Continuity
      1 - 3 4WD shift switch: 2WD Yes
      4WD shift switch: 4H and 4LO No
      1 - 5 4WD shift switch: 4H Yes
      4WD shift switch: 2WD and 4LO No
      1 - 6 4WD shift switch: 4LO Yes
      4WD shift switch: 2WD and 4H No

    OK or NG 

    OK: GO TO 5.

    NG: Replace 4WD shift switch.

  5. 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 6.

    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.

  6. 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 "TRANSFER CONTROL UNIT ".

scientia non olet · About LEMON Manuals