Vehicle Does Not Creep Forward In "D", "2" Or "1" Position

TROUBLE DIAGNOSIS FOR SYMPTOMS


Vehicle Does Not Creep Forward in "D", "2" or "1" Position


SYMPTOM:
Vehicle does not creep forward when selecting "D", "2" or "1" position.

DIAGNOSTIC PROCEDURE
1.CHECK A/T FLUID LEVEL
Check A/T fluid level.
OK or NG
OK >> GO TO 2.
NG >> Refill ATF.
2.CHECK LINE PRESSURE
Check line pressure at idle with selector lever in "D" position. Refer to Inspections Before Trouble Diagnosis .
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to Service and Repair .
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. Refer to Disassembly .
4. Check the following item:
- Oil pump assembly. Refer to Oil Pump .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK STALL REVOLUTION
Check stall revolution with selector lever in "D" position. Refer to Inspections Before Trouble Diagnosis .
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING ITEM
1. Disassemble A/T. Refer to Disassembly .
2. Check the following items:
- Oil pump assembly. Refer to Oil Pump .
- Forward clutch assembly. Refer to Forward And Overrun Clutches .
- Forward one-way clutch. Refer to Rear Internal Gear And Forward Clutch Hub .
- Low one-way clutch. Refer to Disassembly .
- Torque converter. Refer to Disassembly .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to Component .
2. Check A/T fluid condition. Refer to Inspections Before Trouble Diagnosis .
OK or NG
OK >> GO TO 7.
NG >> GO TO 5.
7.CHECK SYMPTOM
Check again. Refer to Check At Idle .
OK or NG
OK >> INSPECTION END
NG >> GO TO 8.
8.CHECK TCM
1. Check TCM input/output signals. Refer to Pinout Values and Diagnostic Parameters .
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.