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. Refer to Reading and Clearing Diagnostic Trouble Codes.
Is any malfunction detected by self-diagnostic results?
YES - Check malfunctioning system. Refer to Consult-III Function (Transmission), Reading and Clearing Diagnostic Trouble Codes.
NO - GO TO 2.
2.CHECK A/T FLUID LEVEL (VK45DE)
Check A/T fluid level. Refer to Checking A/T Fluid.
OK or NG
OK - GO TO 3.
NG - Refill ATF.
3.CHECK A/T POSITION
Check A/T position. Refer to 5AT RE5R05A.
OK or NG
OK - GO TO 4.
NG - Adjust A/T position. Refer to 5AT RE5R05A.
4.CHECK MANUAL MODE SWITCH
Check manual mode switch. Refer to 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. Refer to Service and Repair.
2. Check A/T fluid condition. Refer to 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. Refer to Symptom Chart (Symptom No.47).
OK or NG
OK - GO TO 7.
NG - Repair or replace damaged parts.
7.CHECK SYMPTOM
Check again. Refer to Road Test.
OK or NG
OK INSPECTION END
NG - GO TO 8.
8.CHECK TCM
1. Check TCM input/output signals. Refer to 5AT RE5R05A.
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. Refer to Symptom Chart (Symptom No.47).
OK or NG
OK - GO TO 7.
NG - Repair or replace damaged parts.