A/T Does Not Hold Lock-Up Condition

TROUBLE DIAGNOSIS FOR SYMPTOMS


A/T Does Not Hold Lock-up Condition


SYMPTOM:
A/T does not hold lock-up condition for more than 30 seconds on "Cruise Test -- Part 1".

DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to CONSULT-III Function (A/T) or Diagnosis Procedure Without CONSULT-III .
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to CONSULT-III Function (A/T) or Diagnosis Procedure Without CONSULT-III .
NO >> GO TO 2.
2.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to Component .
2. Check A/T fluid condition. Refer to Inspections Before Trouble Diagnosis .
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to Service and Repair .
2. Check the following items:
- Torque converter clutch control valve
- Torque converter clutch solenoid valve
- Pilot valve
- Pilot filter
3. Disassemble A/T. Refer to Disassembly .
4. Check the following items:
- Torque converter. Refer to Disassembly .
- Oil pump assembly. Refer to Oil Pump .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
4.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to Service and Repair .
2. Check the following items:
- Torque converter clutch control valve
- Torque converter clutch solenoid valve
- Pilot valve
- Pilot filter
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.CHECK SYMPTOM
Check again. Refer to Cruise Test - Part 1 .
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.
6.CHECK TCM
1. Check TCM input/output signals. Refer to Pinout Values and Diagnostic Parameters .
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.