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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 1868 (Transfer Case) >> Trouble Diagnosis For System >> Transfer Control Device >> Diagnostic Procedure
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Diagnostic Procedure

WARNING: This page is about a different car, the 2006 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK POWER SUPPLY 
    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 and ground.
      TRANSFER CONTROL UNIT CONNECTOR TERMINAL AND GROUND VOLTAGE

      Connector Terminal Voltage (Approx.)
      M152 25 - Ground OV
      M153 27 - Ground
      Fig 1: Identifying Voltage Between Transfer Control Unit Connector Terminal And Ground
      G04204232Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Turn ignition switch "ON". (Do not start engine.)
    5. Check voltage between transfer control unit harness connector terminals and ground.
    TRANSFER CONTROL UNIT CONNECTOR TERMINAL AND GROUND VOLTAGE

    Connector Terminal Voltage (Approx.)
    M152 25 - Ground Battery voltage
    M153 27 - Ground
    Fig 2: Identifying Voltage Between Transfer Control Unit Connector Terminals And Ground
    G04204233Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 2.

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

    • 10A fuse (No. 57, located in the fuse and relay box).
    • 40A fusible link (No. j, located in the fuse and fusible link box).
    • Harness for short or open between battery and transfer shut off relay 1 harness connector E156 terminal 3.
    • Harness for short or open between transfer control unit harness connector M153 terminal 27 and transfer shut off relay 1 harness connector E156 terminal 5.
    • Harness for short or open between ignition switch and transfer shut off relay 1 harness connector E156 terminal 1.
    • Harness for short or open between transfer shut off relay 1 harness connector E156 terminal 2 and ground.
    • Harness for short or open between ignition switch and transfer control unit harness connector M152 terminal 25.
    • Battery and ignition switch. Refer to "POWER SUPPLY ROUTING CIRCUIT ".
    • Transfer shut off relay 1. Refer to "COMPONENT INSPECTION ".
  2. CHECK GROUND CIRCUIT 
    1. Turn ignition switch "OFF".
    2. Disconnect transfer control unit harness connector.
    3. Check continuity between transfer control unit harness connector M153 terminal 32 and ground.

    Continuity should exist  .

    Also check harness for short to power.

    OK or NG 

    OK: GO TO 3.

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

    Fig 3: Identifying Continuity Between Transfer Control Unit Connector M153 Terminal 32 And Ground
    G04204234Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK POWER SUPPLY SIGNAL 
    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 terminal and ground.
      TRANSFER CONTROL UNIT CONNECTOR TERMINAL AND GROUND VOLTAGE

      Connector Terminal Voltage (Approx.)
      M153 40 - Ground Battery voltage
      Fig 4: Identifying Voltage Between Transfer Control Unit Connector Terminal And Ground
      G04204235Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Turn ignition switch "ON". (Do not start engine.)
    5. Check voltage between transfer control unit harness connector terminal and ground.
    TRANSFER CONTROL UNIT CONNECTOR TERMINAL AND GROUND VOLTAGE

    Connector Terminal Voltage (Approx.)
    M153 40 - Ground OV

    OK or NG 

    OK: GO TO 4.

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

    • Harness for short or open between battery and transfer shut off relay 2 harness connector E157 terminal 1.
      Fig 5: Identifying Voltage Between Transfer Control Unit Connector Terminal And Ground
      G04204236Courtesy of NISSAN MOTOR CO., U.S.A.
    • Harness for short or open between transfer shut off relay 2 harness connector E157 terminal 2 and transfer control unit harness connector M153 terminal 40.
    • Transfer shut off relay 2. Refer to "COMPONENT INSPECTION ".
  4. 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-1: With CONSULT-II: GO T0 5.

    OK-2: Without CONSULT-II: GO T0 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.

  5. PERFORM SELF-DIAGNOSIS (WITH CONSULT-II) 

    With CONSULT-II 

    1. Turn ignition switch "ON". (Do not start engine.)
    2. Select "SELF-DIAG RESULTS" mode for "ALL MODE AWD/4WD" with CONSULT-II.
    3. Touch "ERASE".
    4. Turn ignition switch "OFF" and wait at least 10 seconds.
    5. Perform the self-diagnosis again.

    Is the "SHIFT ACT CIR [P1819]" displayed? 

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

    NO: Inspection End.

  6. PERFORM SELF-DIAGNOSIS (WITHOUT CONSULT-II) 

    Without CONSULT-II 

    1. Perform the self-diagnosis and then erase self-diagnostic results. Refer to "SELF-DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-II) " and "ERASE SELF-DIAGNOSIS ".
    2. Perform the self-diagnosis again.

    Do the self-diagnostic results indicate transfer control device? 

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

    NO: Inspection End.

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