A/T Does Not Perform Lock-up

SYMPTOM: 

A/T does not perform lock-up at the specified speed. 

1. CHECK SELF-DIAGNOSTIC RESULTS 

   Does self-diagnosis show damage to torque converter clutch solenoid valve circuit after cruise test?

   Fig 1: Self-Diagnostic Blinking Pattern

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

   Yes or No 

   1. Yes: Check torque converter clutch solenoid valve circuit. Refer to "DTC P0740 ".
   2. No: GO TO 2.
2. CHECK ACCELERATOR PEDAL POSITION SENSOR (THROTTLE POSITION SENSOR) 

   Check accelerator pedal position sensor (throttle position sensor). Refer to ACCELERATOR PEDAL POSITION SENSOR .

   Fig 2: Identifying Accelerator Pedal Position Sensor (Throttle Position Sensor)

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

   OK or NG 

   1. OK: GO TO 3.
   2. NG: Repair or replace accelerator pedal position sensor (throttle position sensor).
3. DETECT MALFUNCTIONING ITEM 
   1. Remove control valve. Refer to CONTROL VALVE ASSEMBLY AND ACCUMULATORS .
   2. Check following items:
      • Torque converter clutch control valve
      • Torque converter relief valve
      • Torque converter clutch solenoid valve
      • Pilot valve
      • Pilot filter

   OK or NG 

   1. OK: GO TO 4.
   2. NG: Repair or replace damaged parts.
4. CHECK SYMPTOM 

   Check again.

   OK or NG 

   1. OK: INSPECTION END 
   2. NG:
      1. Perform TCM input/output signal inspection.
      2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.