A/T Does Not Perform Lock-Up

A/T Does Not Lock-up

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

DIAGNOSTIC PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT-92, "SELF-DIAGNOSTIC RESULT MODE", AT-102, "TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)".
Self-Diagnostic Result Mode
TCM Self-Diagnostic Procedure (No Tools)
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to AT-92, "SELF-DIAGNOSTIC RESULT MODE", AT-103, "Judgement Self-diagnosis Code".
Self-Diagnostic Result Mode
TCM Self-Diagnostic Procedure (No Tools)
NO >> GO TO 2.

2. CHECK A/T FLUID LEVEL





Check A/T fluid level.
OK or NG
OK >> GO TO 3.
NG >> Refill [1][2]ATF.

3. CHECK LINE PRESSURE





Check line pressure at the engine stall point. Refer to AT-54, "LINE PRESSURE TEST". Line Pressure Test
OK or NG
OK >> GO TO 6.
NG-1 >> Line pressure high: GO TO 4.
NG-2 >> Line pressure low: GO TO 5.

4. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM.
2. Disassemble A/T.
3. Check the following.
- Oil pump assembly.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.

5. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM.
2. Disassemble A/T.
3. Check the following.
- Oil pump assembly.
- Power train system.
- Transmission case.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.

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





2. Check A/T fluid condition. Refer to AT-53, "A/T Fluid Condition Check". A/T Fluid Condition Check
OK or NG
OK >> GO TO 7.
NG >> GO TO 10.

7. DETECT MALFUNCTIONING ITEM
Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-64, "Symptom Chart" (Symptom No.24). Symptom Chart
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.

8. CHECK SYMPTOM
Check again. Refer to AT-58, "Cruise Test - Part 1". Cruise Test - Part 1
OK or NG
OK >> INSPECTION END
NG >> GO TO 9.

9. CHECK TCM
1. Check TCM input/output signals. Refer to AT-89, "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.

10. DETECT MALFUNCTIONING ITEM
Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-64, "Symptom Chart" (Symptom No.24). Symptom Chart
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.