A/T Does Not Perform Lock-Up

A/T Does Not Perform Lock-up

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

DIAGNOSTIC PROCEDURE
1. CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to "A/T FLUID CHECK".
OK or NG
OK >>GO TO 2.
NG >>Refill ATF.

2. CHECK STOP LAMP SWITCH CIRCUIT
Check the stop lamp switch circuit. Refer to "TROUBLE DIAGNOSIS" (with ABS), "TROUBLE DIAGNOSIS" (with TCS/ABS) or "TROUBLE DIAGNOSIS" (with VDC/TCS/ABS).
OK or NG
OK >>GO TO 3.
NG >>Repair or replace damaged parts.

3. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Is any malfunction detected by self-diagnostic?
YES >>Check the malfunctioning system.
NO >>GO TO 4.

4. DETECT MALFUNCTIONING ITEM
1. Control valve assembly. Refer to "Control Valve Assembly".
2. Disassemble A/T. Refer to "DISASSEMBLY".
3. Check the following items:
^ Torque converter. Refer to "DISASSEMBLY".
OK or NG
OK >>GO TO 5.
NG >>Repair or replace damaged parts.

5. CHECK TCM
1. Check TCM input/output signal. Refer to "TCM Input/Output Signal Reference Values". Pinout Values and Diagnostic Parameters
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>GO TO 6.
NG >>Repair or replace damaged parts.

6. CHECK SYMPTOM
Check again.
OK or NG
OK >> INSPECTION END
NG >>Repair or replace damaged parts.