A/T Does Not Perform Lock-Up

TROUBLE DIAGNOSIS FOR SYMPTOMS

A/T Does Not Perform Lock-up


SYMPTOM:

A/T does not perform lock-up at the specified speed on "Cruise Test - Part 1".

DIAGNOSTIC PROCEDURE


1. CHECK SELF-DIAGNOSTIC RESULTS

Perform self-diagnosis. Automatic Transmission or Automatic Transmission .
Is any malfunction detected by self-diagnostic results?
YES- Check the malfunctioning system. Automatic Transmission or
Automatic Transmission .
NO- GO TO 2.

2. CHECK ACCELERATOR PEDAL POSITION SENSOR

Check accelerator pedal position sensor. P2122.
OK or NG
OK- GO TO 3.
NG- Repair or replace accelerator pedal position sensor.

3. DETECT MALFUNCTIONING ITEM

1.Remove control valve. Service and Repair .
2.Check following items:
-Torque converter clutch control valve
-Torque converter clutch solenoid valve
-Torque converter relief valve
-Pilot valve
-Pilot filter
3.Disassemble A/T. Disassembly .
4.Check the following items:
-Torque converter. Disassembly .
OK or NG
OK- GO TO 4.
NG- Repair or replace damaged parts.

4. CHECK SYMPTOM

Check again. Automatic Transmission .
OK or NG
OK-INSPECTION END
NG- GO TO 5.

5. CHECK TCM

1.Check TCM input/output signals. Automatic Transmission .
2.If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK-INSPECTION END
NG- Repair or replace damaged parts.