A/T Does Not 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

With CONSULT-III
^ Perform self-diagnosis.

Without CONSULT-III
^ Perform self-diagnosis. Refer to AT-91, "Diagnosis Procedure without CONSULT-III". Diagnosis Procedure Without Consult-III
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to AT-84, "CONSULT-III Function (TRANSMISSION)", AT-91, "Diagnosis Procedure without CONSULT-III".
Consult-III Function (Transmission)
Diagnosis Procedure Without Consult-III
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-49, "Inspections Before Trouble Diagnosis". Inspections Before Trouble Diagnosis
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-49, "Inspections Before Trouble Diagnosis". Inspections Before Trouble Diagnosis
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-59, "Symptom Chart" (Symptom No.24). Symptom Table
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.

8. CHECK SYMPTOM
Check again. Refer to AT-53, "Road Test". Road Test
OK or NG
OK >> INSPECTION END
NG >> GO TO 9.

9. CHECK TCM
1. Check TCM input/output signals. Refer to AT-83, "TCM Input/Output Signal Reference Value". 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-59, "Symptom Chart" (Symptom No.24). Symptom Table
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.