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 4 and ground.
  
  Fig 1: Checking Valve Resistance
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 2.
2. NG:
  1. Remove control valve assembly. Refer to REMOVAL .
  2. Check the following items:
  - Line pressure solenoid valve
    Refer to COMPONENT INSPECTION .
  - Harness of terminal cord assembly for short or open
CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to OFF position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal 4 and TCM harness connector terminal 2.
  
  Fig 2: Checking Power Source Circuit (Terminal 4 & TCM Harness Connector Terminal 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: Check the following items:
  - Dropping resistor
    Refer to DROPPING RESISTOR .
  - Harness for short or open between TCM terminal 2 and terminal cord assembly (Main harness)
CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to OFF position.
2. Check resistance between terminal 4 and TCM harness connector terminal 1.
  
  Fig 3: Checking Power Source Circuit (Terminal 4 & TCM Harness Connector Terminal 1)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  If OK, check harness for short to ground and short to power.
3. 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:
  1. Perform TCM input/output signal inspection.
  2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.