Diagnostic Procedure

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.

Perform LINE PRESSURE TEST .

Fig 2: Checking Line Pressure

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Refer to "LINE PRESSURE TEST ".

OK or NG 

1. OK: GO TO 3.
2. NG: GO TO  6.

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 4.
2. NG: Repair control valve.

Fig 3: Checking Control Valve

Courtesy of NISSAN MOTOR CO., U.S.A.

Does A/T shift from D3 to D4 at the specified speed?

Yes or No 

1. Yes: GO TO 5.
2. No: Check transaxle internal components (clutch, brake, etc.).

Perform "DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE ".

OK or NG 

1. OK: INSPECTION END 
2. NG: GO TO  11. Check for proper lock-up.

1. Remove control valve assembly. Refer to "REMOVAL ".
   • Line pressure solenoid valve
2. Check resistance to the terminal and ground.

Fig 4: Checking Valve Resistance

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO  8.
2. NG: Replace solenoid valve assembly.

1. Remove control valve assembly. Refer to "REMOVAL ".
   • Line pressure solenoid valve
2. Check solenoid valve by listening for its operating sound while applying battery voltage and ground to the solenoid.

Fig 5: Checking Valve Operation

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO 8.
2. NG: Replace solenoid valve assembly.

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 9.
2. NG: Repair control valve.

Fig 6: Checking Control Valve

Courtesy of NISSAN MOTOR CO., U.S.A.

Does A/T shift from D3 to D4 at the specified speed?

Yes or No 

1. Yes: GO TO 10.
2. No: Check transaxle internal components (clutch, brake, etc.).

Perform "DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE ".

OK or NG 

1. OK: INSPECTION END 
2. NG: GO TO 11. Check for proper lock-up.

During CRUISE TEST - Part 1", does A/T perform at the specified speed?

Yes or No 

1. Yes: GO TO Perform "CRUISE TEST - PART 1 " again and return to the start point of this test group.
2. No: GO TO 12.

Fig 7: Checking Lock-Up Condition

Courtesy of NISSAN MOTOR CO., U.S.A.

1. Remove control valve assembly. Refer to "REMOVAL ".
   • Torque converter clutch solenoid valve
2. Check resistance between terminal cord assembly connector F30 terminal 5 and ground.

Fig 8: Checking Valve Resistance

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO  14.
2. NG: Replace solenoid valve assembly.

1. Remove control valve assembly. Refer to "REMOVAL ".
   • Torque converter clutch solenoid valve
2. Check solenoid valve by listening for its operating sound while applying battery voltage and ground to the solenoid.

Fig 9: Checking Valve Operation

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO 14.
2. NG: Replace solenoid valve assembly.

1. Disassemble control valve assembly. Refer to "DISASSEMBLY ".
2. Check control valves for sticking.

• Torque converter clutch control valve
• Torque converter clutch relief valve

OK or NG 

1. OK: GO TO 15.
2. NG: Repair control valve.

Fig 10: Checking Control Valve

Courtesy of NISSAN MOTOR CO., U.S.A.

Does A/T perform lock-up at the specified speed?

Yes or No 

1. Yes: GO TO 16.
2. No: Check transaxle internal components (clutch, brake, etc.).

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.