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 SHIFT UP (D3 TO D4)
During Cruise Test - Part 1 , does A/T shift from D3 to D4 at the specified speed?

Yes or No
1. Yes: GO TO 11.
2. No: GO TO 2.
Fig 1: Checking Shift Up (D3 To D4)
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK LINE PRESSURE
Perform line pressure test.

Fig 2: Line Pressure Specifications
Courtesy of NISSAN MOTOR CO., U.S.A.

Refer to LINE PRESSURE TEST .

OK or NG
1. OK: GO TO 3.
2. NG: GO TO 7.
CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to REMOVAL .
  - Shift solenoid valve A
  - Shift solenoid valve B
2. Check resistance between terminal cord assembly connector F30 terminals 1 and 2 and ground.
  
  Fig 3: Checking Resistance Between Terminal Cord Assembly Connector F30 Terminals 1, 2 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 5.
2. NG: Replace solenoid valve assembly.
CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to REMOVAL .
  - Shift solenoid valve A
  - Shift solenoid valve B
2. Check solenoid valve by listening for its operating sound while applying battery voltage and ground to the solenoid.
  
  Fig 4: Checking Valve Operation
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 5.
2. NG: Replace solenoid valve assembly.
CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to DISASSEMBLY .
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.
  Fig 5: Checking Control Valve
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 6.
2. NG: Repair control valve.
CHECK SHIFT UP (D3 TO D4)
Does A/T shift from D3 to D4 at the specified speed?

Yes or No
1. Yes: GO TO 11.
2. No: Check control valve again. Repair or replace control valve assembly.
CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to REMOVAL .
  - Line pressure solenoid valves
2. Check resistance between the terminal cord assembly connector F30 terminal 4 and ground.
  
  Fig 6: Checking Resistance Between Terminal Cord Assembly Connector F30 Terminal 4 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 9.
2. NG: Replace solenoid valve assembly.
CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to REMOVAL .
  - Line pressure solenoid valves
2. Check solenoid valve by listening for its operating sound while applying battery voltage and ground to the solenoid.
  
  Fig 7: Checking Valve Operation
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 9.
2. NG: Replace solenoid valve assembly.
CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to DISASSEMBLY .
2. Check line pressure circuit valves for sticking.
  - Pressure regulator valve
  - Pilot valve
  - Pressure modifier valve
  Fig 8: Checking Control Valve
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 10.
2. NG: Repair control valve.
CHECK SHIFT UP (D3 TO D4)
Does A/T shift from D3 to D4 at the specified speed?

Yes or No
1. Yes: GO TO 11.
2. No: Check control valve again. Repair or replace control valve assembly.
CHECK DTC
Perform DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE .

OK or NG
1. OK: INSPECTION END
2. NG: Perform Cruise test - Part 1 again and return to the start point of this test group.