Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to "CONTROL VALVE ASSEMBLY AND ACCUMULATORS ".
  - Shift solenoid valve A
  - Shift solenoid valve B
2. Check resistance between two terminals.
  
  Fig 1: Solenoid Valves A And B Resistance Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Resistance Between Shift Solenoid Valve A Terminal 2, Solenoid Valve Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 2.
2. NG: Repair or replace damaged parts.
CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to "CONTROL VALVE ASSEMBLY AND ACCUMULATORS ".
  - Shift solenoid valve A
  - Shift solenoid valve B
2. Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal and ground.
OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace shift solenoid valve assembly.
Fig 3: Checking Operation Of Solenoid Valve A And B
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to "CONTROL VALVE ASSEMBLY ".
2. Check to ensure that:
- Valve, sleeve and plug slide along valve bore under their own weight.
- Valve, sleeve and plug are free from burrs, dents and scratches.
- Control valve springs are free from damage, deformation and fatigue.
- Hydraulic line is free from obstacles.
OK or NG
1. OK: GO TO 4.
2. NG: Repair control valve assembly.
Fig 4: Identifying Control Valve
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK DTC
Perform "DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE ".

OK or NG
1. OK: INSPECTION END
2. NG: Check control valve again. Repair or replace control valve assembly.