Vehicle Does Not Creep Backward In "R" Position

Vehicle Does Not Creep Backward in "R" Position

SYMPTOM: Vehicle does not creep backward when selecting "R" position.

DIAGNOSTIC PROCEDURE

1. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to MA-22, "Checking A/T Fluid".

OK or NG
OK >> GO TO 2.
NG >> Refill ATF.

2. CHECK LINE PRESSURE
Check line pressure at idle with selector lever in "R" position. Refer to AT-48, "Inspections Before Trouble Diagnosis". Inspections Before Trouble Diagnosis
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.

3. DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly.
2. Check the following items:
- Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)
- Line pressure solenoid valve
3. Disassemble A/T.
4. Check the following item:
- Oil pump assembly.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.

4. CHECK STALL REVOLUTION
Check stall revolution with selector lever in "1" and "R" positions. Refer to AT-48, "Inspections Before Trouble Diagnosis". Inspections Before Trouble Diagnosis
OK or NG
OK >> GO TO 6.
OK in "1" position, NG in "R" position >> GO TO 5.
NG in both "1" and "R" positions >> GO TO 7.

5. DETECT MALFUNCTIONING ITEM
1. Disassemble A/T.
2. Check the following items:
- Low & reverse brake assembly.
- Reverse clutch assembly.
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-48, "Inspections Before Trouble Diagnosis". Inspections Before Trouble Diagnosis
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.

7. DETECT MALFUNCTIONING ITEM
1. Disassemble A/T.
2. Check the following items:
- Reverse clutch assembly.
- High clutch assembly.
- Low & reverse brake assembly.
- Forward clutch assembly.
- Overrun clutch assembly.
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.

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

9. CHECK TCM
1. Check TCM input/output signals. Refer to AT-71, "TCM Terminal and Reference Value". RE4F03B 4 Speed Automatic Transmission
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.