A/T Does Not Shift 5GR to 4GR

TROUBLE DIAGNOSIS FOR SYMPTOMS


A/T Does Not Shift: 5GR to 4GR


SYMPTOM:
When shifted from M5 to M4 position in manual mode, does not downshift from 5GR to 4GR.

DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
With CONSULT-III
- Select "SELF-DIAG RESULTS" in "TRANSMISSION".
Without CONSULT-III
- Perform the self-diagnosis. Diagnosis Procedure Without CONSULT-III.
Is any malfunction detected by self-diagnostic results?
YES - Check malfunctioning system. CONSULT-III Function (Transmission), Diagnosis Procedure Without CONSULT-III.
NO - GO TO 2.
2.CHECK A/T FLUID LEVEL (VK45DE)
Check A/T fluid level. Checking A/T Fluid.
OK or NG
OK - GO TO 3.
NG - Refill ATF.
3.CHECK A/T POSITION
Check A/T position. Testing and Inspection.
OK or NG
OK - GO TO 4.
NG - Adjust A/T position. Adjustments.
4.CHECK MANUAL MODE SWITCH
Check manual mode switch. 5AT RE5R05A 5AT RE5R05A 5AT RE5R05A 5AT RE5R05A 5AT RE5R05A.
OK or NG
OK - GO TO 5.
NG - Repair or replace damaged parts.
5.CHECK A/T FLUID CONDITION (VK45DE)
1. Remove oil pan. Service and Repair.
2. Check A/T fluid condition. Inspections Before Trouble Diagnosis.
OK or NG
OK - GO TO 6.
NG - GO TO 9.
6.DETECT MALFUNCTIONING ITEM
Check malfunction items. If any items are damaged, repair or replace damaged parts. Symptom Chart (Symptom No.47).
OK or NG
OK - GO TO 7.
NG - Repair or replace damaged parts.
7.CHECK SYMPTOM
Check again. Road Test.
OK or NG
OK - INSPECTION END
NG - GO TO 8.
8.CHECK TCM
1. Check TCM input/output signals. TCM Input/Output Signal Reference Value.
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.
9.DETECT MALFUNCTIONING ITEM
Check malfunction items. If any items are damaged, repair or replace damaged parts. Symptom Chart (Symptom No.47).
OK or NG
OK - GO TO 7.
NG - Repair or replace damaged parts.