Diagnostic Procedure

Check Shift Up (D ₃ To D ₄ )
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.
1. Yes or No
Yes: GO TO 11.

No: GO TO 2.
Check Line Pressure
Perform line pressure test.

Fig 2: Identifying Check Line Pressure Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Refer to LINE PRESSURE TEST .
1. OK or NG
OK: GO TO 3.

NG: GO TO 7.
Check Shift Solenoid 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: Checking Shift Solenoid Valve Resistance
  Courtesy of NISSAN MOTOR CO., U.S.A.
1. OK or NG
OK: GO TO 5.

NG: Replace shift solenoid valve assembly.
CHECK SHIFT SOLENOID 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 4: Checking Shift Solenoid Valve Operation Assembly
  Courtesy of NISSAN MOTOR CO., U.S.A.
1. OK or NG
OK: GO TO 5.

NG: Replace shift solenoid valve assembly.
Check Control Valve
1. Disassemble control valve assembly. Refer to CONTROL VALVE ASSEMBLY .
  
  Fig 5: Checking Control Valve Assembly
  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.
1. OK or NG
OK: GO TO 6.

NG: Repair control valve.
Check Shift Up (D ₃ To D ₄ )
Does A/T shift from D₃ to D₄ at the specified speed?
1. OK or NG
OK: GO TO 11.

NG: Check transaxle inner parts. (Clutch, brake, etc.)
Check Solenoid 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 6: Checking Solenoid Valve Resistance System
  Courtesy of NISSAN MOTOR CO., U.S.A.
1. OK or NG
OK: GO TO 9.

NG: Replace solenoid valve assembly.
Check Solenoid 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.
  
  Fig 7: Checking Solenoid Valve Operation System
  Courtesy of NISSAN MOTOR CO., U.S.A.
1. OK or NG
OK: GO TO 9.

NG: Replace solenoid valve assembly.
Check Control Valve
1. Disassemble control valve assembly. Refer to CONTROL VALVE ASSEMBLY .
  
  Fig 8: Checking Control Valve
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check line pressure circuit valves for sticking.
  - Pressure regulator valve
  - Pilot valve
  - Pressure modifier valve
1. OK or NG
OK: GO TO 10.

NG: Repair control valve.
Check Shift Up (D ₃ To D ₄ )
Does A/T shift from D₃ to D₄ at the specified speed?
1. OK or NG
OK: GO TO 11.

NG: Check transaxle inner parts. (Clutch, brake, etc.)
Check DTC
Perform DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE .
1. OK or NG
OK: Inspection End

NG: Perform "Cruise test - Part 1" again and return to the start point of this test group.