A/T Does Not Hold Lock-Up Condition
13. A/T Does Not Hold Lock-up ConditionSYMPTOM: A/T does not hold lock-up condition for more than 30 seconds.
1. CHECK DIAGNOSTIC RESULTS
Does self-diagnosis show damage to engine speed signal circuit after cruise test?
Yes or No
Yes >> Check engine speed signal circuit. Refer to DTC P0725 ENGINE SPEED SIGNAL.
No >> GO TO 2.
2. CHECK A/T FLUID CONDITION
1. Remove oil pan.
2. Check A/T fluid condition.
OK or NG
OK >> GO TO 3.
NG >> GO TO 5.
3. DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly.
2. Check the following items:
^ Torque converter clutch control valve
^ Pilot valve
^ Pilot filter
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK SYMPTOM
Check again.
OK or NG
OK >> INSPECTION END
NG >>
1. Perform TCM input/output signal inspection. Pinout Values and Diagnostic Parameters Pinout Values and Diagnostic Parameters
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
5. DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly.
2. Check the following items:
- Torque converter clutch control valve
- Pilot valve
- Pilot filter
3. Disassemble A/T.
4. Check torque converter and oil pump assembly.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.