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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 834 (Transfer Case) >> ATX14B >> Trouble Diagnosis For Symptoms >> 4WD Warning Lamp Does Not Turn ON >> 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 TRANSFER CONTROL UNIT POWER SUPPLY CIRCUIT 
    1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
    2. Connect transfer control unit harness connector.
    3. Check voltage between transfer control unit harness connector terminals and ground.
      CONNECTOR TERMINAL VOLTAGE REFERENCE

      Connector Terminal Voltage (Approx.)
      M152 16 - Ground 0V
      22 - Ground
      M153 29 - Ground
      30 - Ground Battery voltage
      47 - Ground
      Fig 1: Checking Voltage Between Transfer Control Unit Harness Connector Terminals And Ground
      G04901466
    4. Turn ignition switch "ON". (Do not start engine.)
    5. Check voltage between transfer control unit harness connector terminals and ground.
      CONNECTOR TERMINAL VOLTAGE REFERENCE

      Connector Terminal Voltage (Approx.)
      M152 16 - Ground Battery voltage
      22 - Ground
      M153 29 - Ground
      30 - Ground 0V
      47 - Ground Battery voltage
      Fig 2: Checking Voltage Between Transfer Control Unit Harness Connector Terminals And Ground
      G04901467

    OK or NG 

    OK: GO TO 2.

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

    • 10A fuses [No. 21 located in fuse block (J/B) and No. 59 located in the fuse and relay box]. Refer to "POWER SUPPLY ROUTING CIRCUIT ".
    • Harness for short or open between battery and transfer control unit harness connector M153 terminals 47.
    • Harness for short or open between ignition switch and transfer control unit harness connector M153 terminal 29.
    • Harness for short or open between battery and transfer shut off relay harness connector E155 terminal 1 and 3.
    • Harness for short or open between transfer shut off relay harness connector E155 terminal 2 and transfer control unit harness connector M153 terminal 30.
    • Harness for short or open between transfer shut off relay harness connector E155 terminal 5 and transfer control unit harness connector M152 terminals 16 and 22.
    • Battery and ignition switch. Refer to "POWER SUPPLY ROUTING CIRCUIT ".
    • Transfer shut off relay. Refer to "COMPONENT INSPECTION ".
  2. CHECK TRANSFER CONTROL UNIT GROUND CIRCUIT 
    1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
    2. Disconnect transfer control unit harness connector.
    3. Check continuity between transfer control unit harness connector M152 terminals 3 and 6, and M153 terminal 45 and ground.

      Continuity should exist. 

      Also check harness for short to power.

      Fig 3: Checking Continuity Between Transfer Control Unit Connector E152, E153 And Ground
      G04901468

    OK or NG 

    OK: GO TO 3.

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

  3. CHECK COMBINATION METER 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 combination meter harness connector terminal and ground.
      CONNECTOR TERMINAL VOLTAGE REFERENCE

      Connector Terminal Voltage (Approx.)
      M24 16 - Ground 0V
      Fig 4: Checking Voltage Between Combination Meter Harness Connector Terminal And Ground
      G04910155
    4. Turn ignition switch "ON". (Do not start engine.)
    5. Check voltage between combination meter harness connector terminal and ground.
      CONNECTOR TERMINAL VOLTAGE REFERENCE

      Connector Terminal Voltage (Approx.)
      M24 16 - Ground Battery voltage
      Fig 5: Checking Voltage Between Combination Meter Harness Connector Terminal And Ground
      G04910156

    OK or NG 

    OK: GO TO 4.

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

  4. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER 
    1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
    2. Disconnect transfer control unit harness connector and combination meter harness connector.
    3. Check continuity between transfer control unit and combination meter.
      CONNECTOR TERMINAL CONTINUITY REFERENCE

      A B Continuity
      Connector Terminal Connector Terminal
      Transfer control unit: M152 5 Combination meter: M24 26 Yes
      • Also check harness for short to ground and short to power.

    OK or NG 

    OK: GO TO 5.

    NG: Repair or replace damaged parts.

    Fig 6: Checking Continuity Between Transfer Control Unit And Combination Meter
    G04910164
  5. CHECK INDICATOR LAMP CIRCUIT 
    1. Connect combination meter harness connector.
    2. Disconnect transfer control unit harness connector.
    3. Turn ignition switch "ON". (Do not start engine.)
    4. Ground the following terminal using suitable wiring.
      • Transfer control unit harness connector M152 terminal 5 and ground.
        • Fig 7: Checking Transfer Control Unit Harness Connector M152 Terminal 5 And Ground
        G04901579

    Does 4WD warning lamp turn on? 

    OK: GO TO 6.

    NG: Replace combination meter. Refer to "COMBINATION METER ".

  6. SYMPTOM CHECK 

    Check again.

    OK or NG 

    OK: Inspection End

    NG: GO TO 7.

  7. 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: Inspection End.

    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.

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