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Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK VALVE RESISTANCE 
    1. Turn ignition switch to "OFF" position.
    2. Disconnect terminal cord assembly connector on the right side of transfer assembly.
    3. Check resistance between terminal 6 and ground.
      Fig 1: Checking Resistance Between Terminal 6 And Ground
      G02032955Courtesy of NISSAN MOTOR CO., U.S.A.

    Is resistance approx. 2.5 - 5Ω? 

    1. Yes: GO TO  3.
    2. No: GO TO 2.
  2. CHECK VALVE OPERATION 
    1. Remove control valve assembly.

      Refer to ON VEHICLE SERVICE .

    2. Check the following items:
      • Line pressure solenoid valve

        Refer to "Component Inspection ".

      • Harness of terminal cord assembly for short or open

    OK or NG 

    1. OK: GO TO 3.
    2. NG: Repair or replace damaged parts.
  3. CHECK POWER SOURCE AND DROPPING RESISTOR CIRCUIT 
    1. Turn ignition switch to "OFF" position.
    2. Disconnect TCM harness connector.
    3. Check resistance between sub-harness connector B64 terminal 6 and TCM harness connector M119 terminal 2.
      Fig 2: Checking Resistance Between Sub-Harness Connector B64 Terminal 6 And TCM Harness Connector M119 Terminal 2
      G02032956Courtesy of NISSAN MOTOR CO., U.S.A.

    Is resistance approx. 11.2 - 12.8Ω? 

    1. Yes: GO TO  5.
    2. No: GO TO 4.
  4. DETECT MALFUNCTIONING ITEM 

    Check the following items: 

    • Dropping resistor

      Refer to "Component Inspection ".

    • Harness for short or open between TCM harness connector M119 terminal 2 and terminal cord assembly (Main harness)

    OK or NG 

    1. OK: GO TO 5.
    2. NG: Repair or replace damaged parts.
  5. CHECK POWER SOURCE CIRCUIT 
    1. Turn ignition switch to "OFF" position.
    2. Check continuity between terminal 6 and TCM harness connector M119 terminal 1. Refer to WIRING DIAGRAM - AT - LPSV .

      Continuity should exist. 

      If OK, check harness for short to ground or to power.

    3. Reinstall any part removed.
    1. Yes: GO TO 6.
    2. No: Repair or replace harness between TCM terminal 1 and terminal cord assembly.
  6. CHECK DTC 

    Perform DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE , .

    OK or NG 

    1. OK: INSPECTION END 
    2. NG: GO TO 7.
  7. CHECK TCM INSPECTION 
    1. Perform TCM input/output signal inspection.
    2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

    OK or NG 

    1. OK: INSPECTION END 
    2. NG: Repair or replace damaged parts.
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