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.

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 7 and ground.
  
  Fig 1: Checking Resistance Between Terminal 7 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
Is resistance approx. 10 - 20Ω?
1. Yes: GO TO 3.
2. No: GO TO 2.
CHECK VALVE OPERATION
1. Remove oil pan. Refer to ON VEHICLE SERVICE .
2. Check the following items:
  - Torque converter clutch 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 open circuit or short to ground or short to power in harness or connectors.
CHECK RESISTANCE
1. Turn ignition switch to "OFF" position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal 7 and TCM harness connector terminal 3. Refer to WIRING DIAGRAM - AT - TCV .
  Continuity should exist.
  
  If OK, check harness for short to ground and short to power.
4. Reinstall any part removed.
OK or NG
1. OK: GO TO 4.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK DTC
Perform DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE , .

OK or NG
1. OK: INSPECTION END
2. NG: GO TO 5.
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.