Eng. Speed Does Not Return to Idle (Light Braking D4- D3)
15. Engine Speed Does Not Return To Idle (Light Braking D4 - D3)SYMPTOM:
^ Engine speed does not smoothly return to idle when A/T shifts from D4 to D3 .
^ Vehicle does not decelerate by engine brake when A/T selector lever is in 3 position.
^ Vehicle does not decelerate by engine brake when shifting A/T from D to 2 position.
1. CHECK SELF-DIAGNOSTIC RESULTS
Does self-diagnosis show damage to overrun clutch solenoid valve circuit after cruise test?
Yes or No
Yes >> Check overrun clutch solenoid valve circuit. Refer to "DTC P1760 OVERRUN CLUTCH SOLENOID VALVE". P1760
No >> GO TO 2.
2. CHECK THROTTLE POSITION SENSOR [ACCELERATOR PEDAL POSITION (APP) SENSOR]
Check throttle position sensor [accelerator pedal position (APP) sensor]. Refer to "DTC P0122, P0123 TP SENSOR" and "DTC P2122, P2123 APP SENSOR" with QR25DE), or "DTC P0122, P0123 TP SENSOR" and "DTC P2122, P2123 APP SENSOR" with VQ35DE). P0122
OK or NG
OK >> GO TO 3.
NG >> Repair or replace throttle position sensor [accelerator pedal position (APP) sensor].
3. CHECK A/T FLUID CONDITION
1. Remove oil pan.
2. Check A/T fluid condition.
OK or NG
OK >> GO TO 5.
NG >> GO TO4.
4. DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly.
2. Check the following items:
- Overrun clutch control valve
- Overrun clutch reducing valve
- Overrun clutch solenoid valve
3. Disassemble A/T.
4. Check the following items:
- Overrun clutch assembly
- Oil pump assembly
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
5. DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly.
2. Check the following items:
- Overrun clutch control valve
- Overrun clutch reducing valve
-Overrun clutch solenoid valve
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6. CHECK SYMPTOM
Check again.
OK or NG
OK >> INSPECTION END
NG >> GO TO 7.
7. CHECK TCM INSPECTION
1. Perform TCM input/output signal inspection.
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.