Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Nissan Quest. 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?

Fig 1: Checking Shift Up (D3 To D4)
Courtesy of NISSAN MOTOR CO., U.S.A.

Yes or No
1. Yes: GO TO 11.
2. No: GO TO 2.
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 "CONTROL VALVE ASSEMBLY AND ACCUMULATORS "
  - Shift solenoid valve A
  - Shift solenoid valve B
2. Check resistance between two terminals.
  
  Fig 3: Shift Solenoid Valve Resistance Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 4: Checking Shift Solenoid 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 "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.
  
  Fig 5: Checking Shift Solenoid 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 "CONTROL VALVE ASSEMBLY ".
  
  Fig 6: Checking Control Valve
  Courtesy of NISSAN MOTOR CO., U.S.A.
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.
CHECK SHIFT UP (D3 TO D4)
Does A/T shift from D3 to D4 at the specified speed?

OK or NG
1. OK: GO TO step 11.
2. NG: Check transaxle inner parts. (Clutch, brake, etc.)
CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to "CONTROL VALVE ASSEMBLY AND ACCUMULATORS "
  
  Fig 7: Line Pressure Solenoid Valve Resistance Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  - Line pressure solenoid valves
2. Check resistance to the terminal and ground.
  
  Fig 8: Checking Line Pressure Solenoid 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 "CONTROL VALVE ASSEMBLY AND ACCUMULATORS ".
  
  Fig 9: Checking Line Pressure Solenoid Valve Operation
  Courtesy of NISSAN MOTOR CO., U.S.A.
  - Line pressure solenoid valves
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 9.
2. NG: Replace solenoid valve assembly.
CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to "CONTROL VALVE ASSEMBLY ".
  
  Fig 10: Checking Control Valve
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check the pressure circuit valves for sticking.
  - Pressure regulator valve
  - Pivot valve
  - Pressure modifier valve
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?

OK or NG
1. OK: GO TO 11.
2. NG: Check transaxle inner parts. (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 start point of this test group.