A/T Does Not Shift: D3 -> D4
A/T Does Not Shift: D3 ---> D4SYMPTOM: The vehicle does not shift-up from the D3 to D4 gear at the specified speed.
DIAGNOSTIC PROCEDURE
1. CONFIRM THE SYMPTOM
Check if vehicle creeps forward in "D" position and vehicle can be started from D1.
OK or NG
OK >> GO TO 2.
NG >> Refer to AT-178, "Vehicle Does Not Creep Forward in "D" Position", AT-180, "Vehicle Cannot Be Started from D1".
Vehicle Does Not Creep Forward In "D" Position
Vehicle Cannot Be Started From D1
2. 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 3.
3. CHECK A/T FLUID LEVEL
Check A/T fluid level.
OK or NG
OK >> GO TO 4.
NG >> Refill [1][2]ATF.
4. 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 7.
NG-1 >> Line pressure high: GO TO 5.
NG-2 >> Line pressure low: GO TO 6.
5. 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 7.
NG >> Repair or replace damaged parts.
6. 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 7.
NG >> Repair or replace damaged parts.
7. 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 8.
NG >> GO TO 11.
8. 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.12). Symptom Table
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
9. CHECK SYMPTOM
Check again. Refer to AT-53, "Road Test". Road Test
OK or NG
OK >> INSPECTION END
NG >> GO TO 10.
10. 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.
11. 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.12). Symptom Table
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.