A/T Does Not Shift: 4th Gear -> 3rd Gear

A/T Does Not Shift: 4th gear -> 3rd gear

SYMPTOM: When shifted from D4 to 3[3] position, does not downshift from 4th to 3rd gears.

DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis. Refer to AT-90, "SELF-DIAGNOSTIC RESULT MODE". Self-Diagnostic Result Mode
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to AT-90, "SELF-DIAGNOSTIC RESULT MODE". Self-Diagnostic Result Mode
NO >> GO TO 2.

2. CHECK A/T FLUID LEVEL
Check the A/T fluid level.
OK or NG
OK >> GO TO 3.
NG >> Refill ATF.

3. CHECK CONTROL CABLE
Check the control cable.
^ Refer to AT-217, "Checking of A/T Position". Testing and Inspection
OK or NG
OK >> GO TO 4.
NG >> Adjust control cable.

4. CHECK A/T FLUID CONDITION
1. Remove oil pan.
2. Check A/T fluid condition. Refer to AT-54, "Fluid Condition Check". Fluid Condition Check
OK or NG
OK >> GO TO 5.
NG >> GO TO 8.

5. DETECT MALFUNCTIONING ITEM
^ Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-65, "Symptom Chart" (Symptom No.15). Symptom Chart
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.

6. CHECK SYMPTOM
Check again. Refer to AT-62, "Cruise Test - Part 3". Cruise Test - Part 3
OK or NG
OK >> INSPECTION END
NG >> GO TO 7.

7. PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT-87, "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.

8. DETECT MALFUNCTIONING ITEM
^ Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-65, "Symptom Chart" (Symptom No.15). Symptom Chart
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.