Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Nissan Sentra. 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 in engine compartment.
3. Check resistance between terminal cord assembly connector F30 terminal 4 and ground.
  
  Fig 1: Checking Valve Resistance
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: GO TO 2.
CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to REMOVAL .
2. Check the following items:
  - Line pressure solenoid valve
  - Check solenoid valve by listening for its operating sound while applying battery voltage and ground to the solenoid.
    
    Fig 2: Checking Valve Operation
    Courtesy of NISSAN MOTOR CO., U.S.A.
  - Harness of terminal cord assembly for short or open
OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace damaged parts.
CHECK POWER SOURCE AND DROPPING RESISTOR CIRCUIT
1. Turn ignition switch to OFF position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal cord assembly harness connector F30 terminal 4 and TCM harness connector F56 terminal 2.
  
  Fig 3: Checking Power Source And Dropping Resistor Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. Resistance: Approximately 12Ω
OK or NG
1. OK: GO TO 5.
2. NG: GO TO 4.
DETECT MALFUNCTIONING ITEM
Check the following items:
- Dropping resistor
- Check resistance between two terminals.
  
  Fig 4: Detecting Malfunctioning Item
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. Resistance: Approximately 12Ω
- Harness for short or open between TCM terminal 2 and terminal cord assembly (Main harness)
OK or NG
1. OK: GO TO 5.
2. NG: Repair or replace damaged parts.
CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to OFF position.
2. Check continuity between terminal cord assembly connector F30 terminal 4 and TCM harness connector F56 terminal 1. Refer to Wiring Diagram - AT - LPSV .
  1. Continuity should exist.
3. Reinstall any part removed.
OK or NG
1. OK: GO TO 6.
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 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.