Vehicle Does Not Creep Backward In R Position

Vehicle Does Not Creep Backward In R Position

SYMPTOM: The vehicle does not creep in the R position. Or an extreme lack of acceleration is observed.

DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT-86, "SELF-DIAGNOSTIC RESULT MODE". Self-Diagnostic Result Mode
Do the self-diagnostic results indicate accelerator pedal position sensor, ATF pressure switch 6, high and low reverse clutch solenoid valve, CAN communication line, PNP switch?
YES >> Check the malfunctioning system.
NO >> GO TO 2.

2. CHECK CONTROL CABLE





Check the control cable.
OK or NG
OK >> GO TO 3.
NG >> Adjust control cable.

3. CHECK A/T FLUID LEVEL





Check A/T fluid level.
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.

4. CHECK STALL TEST





Check stall revolution with selector lever in "1" and "R" positions.
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 8.

5. DETECT MALFUNCTIONING ITEM
1. Disassemble A/T.
2. Check the following items:
^ Reverse brake.
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.

6. CHECK LINE PRESSURE





Check the line pressure with the engine idling.
OK or NG
OK >> GO TO 9.
NG - 1 >> Line pressure high. GO TO 7.
NG - 2 >> Line pressure low. GO TO 8.

7. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM.
2. Disassemble A/T.
3. Check the following items:
^ Oil pump assembly.
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.

8. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM.
2. Disassemble A/T.
3. Check the following items:
^ Oil pump assembly.
^ Powertrain system.
^ Transmission case.
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.

9. CHECK A/T FLUID CONDITION
1. Remove oil pan.





2. Check A/T fluid condition.
OK or NG
OK >> GO TO 10.
NG >> GO TO 13.

10. DETECT MALFUNCTIONING ITEM
^ Check the malfunction items. If any items are damaged, repair or replace damaged parts.
OK or NG
OK >> GO TO 11.
NG >> Repair or replace damaged parts.

11. CHECK SYMPTOM
Check again.
OK or NG
OK >> INSPECTION END
NG >> GO TO 12.

12. PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT-83, "TCM Input/Output Signal Reference Values". TCM Input/Output Signal Reference Values
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.

13. DETECT MALFUNCTIONING ITEM
^ Check the malfunction items. If any items are damaged, repair or replace damaged parts.
OK or NG
OK >> GO TO 11.
NG >> Repair or replace damaged parts.