Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.

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: Pressing Accelerator Pedal (D3 TO D4)
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK LINE PRESSURE
Perform line pressure test.

Fig 2: Line Pressure Test Reference Chart
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: Identifying Solenoid Valve Terminal Resistance Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 5.
2. NG: Replace solenoid valve assembly.
  
  Fig 4: Solenoid Valves A & B, Terminals 1 & 2 Continuity Test
  Courtesy of NISSAN MOTOR CO., U.S.A.
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 5.
2. NG: Replace solenoid valve assembly.
  
  Fig 5: Checking Valve Operation
  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 6.
2. NG: Repair control valve.
  
  Fig 6: 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?

OK or NG
1. OK: GO TO 11.
2. NG: Check control valve again. Repair or replace control valve assembly.
CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to "CONTROL VALVE ASSEMBLY AND ACCUMULATORS ".
  - Line pressure solenoid valves
2. Check resistance to the terminal and ground.
  
  Fig 7: Solenoid Valve Terminal Resistance Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 9.
2. NG: Replace solenoid valve assembly.
  
  Fig 8: Line Pressure Solenoid Valve, Terminal Assembly 4 Continuity Test
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to "CONTROL VALVE ASSEMBLY AND ACCUMULATORS ".
  - 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.
  
  Fig 9: Checking Solenoid Valve
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to "CONTROL VALVE ASSEMBLY ".
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 10: 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?

OK or NG
1. OK: GO TO 11.
2. NG: 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.