Vehicle Does Not Creep Backward In "R" Position

TROUBLE DIAGNOSIS FOR SYMPTOMS


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. Procedures .
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. Inspections Before Trouble Diagnosis .
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. 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. Disassembly .
4. Check the following item:
- Oil pump assembly. 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 "1" and "R" positions. 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. Disassembly .
2. Check the following items:
- Low & reverse brake assembly. Low & Reverse Brake
- Reverse clutch assembly. Reverse Clutch .
OK or NG
OK - GO TO 6.
NG - Repair or replace damaged parts.
6.CHECK A/T FLUID CONDITION
1. Remove oil pan. Component .
2. Check A/T fluid condition. Inspections Before Trouble Diagnosis .
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.DETECT MALFUNCTIONING ITEM
1. Disassemble A/T. Disassembly .
2. Check the following items:
- Reverse clutch assembly. Reverse Clutch .
- High clutch assembly. High Clutch .
- Low & reverse brake assembly. Low & Reverse Brake
- Forward clutch assembly. Forward And Overrun Clutches .
- Overrun clutch assembly. Forward And Overrun Clutches .
OK or NG
OK - GO TO 8.
NG - Repair or replace damaged parts.
8.CHECK SYMPTOM
Check again. Check At Idle .
OK or NG
OK - INSPECTION END
NG - GO TO 9.
9.CHECK TCM
1. Check TCM input/output signals. TCM Terminal And Reference Value .
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.