A/T Does Not Hold Lock-Up Condition

A/T Does Not Hold Lock-up Condition

SYMPTOM: The lock-up condition cannot be maintained for more than 30 seconds.

DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT-86, "SELF-DIAGNOSTIC RESULT MODE". Self-Diagnostic Result Mode
Do the self-diagnostic results indicate torque converter clutch solenoid valve, engine speed signal, turbine revolution sensor, CAN communication?
YES >> Check the malfunctioning system. Refer to AT-114, "DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE", AT-112, "DTC P0725 ENGINE SPEED SIGNAL", AT-105, "DTC P0717 TURBINE REVOLUTION SENSOR", AT-93, "DTC U1000 CAN COMMUNICATION LINE".
P0740
P0725
P0717
U1000
NO >> GO TO 2.

2. CHECK A/T FLUID LEVEL





Check A/T fluid level.
OK or NG
OK >> GO TO 3.
NG >> Refill ATF.

3. CHECK A/T FLUID CONDITION
1. Remove oil pan.





2. Check A/T fluid condition. Refer to AT-51, "Fluid Condition Check". Fluid Condition Check
OK or NG
OK >> GO TO 4.
NG >> GO TO 7.

4. DETECT MALFUNCTIONING ITEM
^ Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-61, "Symptom Chart" (Symptom No.25). Symptom Chart
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.

5. CHECK SYMPTOM
Check again. Refer to AT-55, "Check at Idle". Check at Idle
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.

6. PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT-83, "TCM Input/Output Signal Reference Values". Pinout Values and Diagnostic Parameters
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.

7. DETECT MALFUNCTIONING ITEM
^ Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-61, "Symptom Chart" (Symptom No.25). Symptom Chart
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.