Diagnostic Procedure

WARNING: This page is about a different car, the 2004 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: Checking Line Pressure
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 Valve Resistance
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.
OK or NG
1. OK: GO TO 6.
2. NG: Repair control valve.
Fig 5: Checking Control Valve
Courtesy of NISSAN MOTOR CO., U.S.A.
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 transaxle internal components (clutch, brake, etc.).
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 Valve Resistance
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
OK or NG
1. OK: GO TO 10.
2. NG: Repair control valve.
Fig 8: Checking Control Valve
Courtesy of NISSAN MOTOR CO., U.S.A.
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 transaxle internal components (clutch, brake, etc.).
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.