Engine Speed Does Not Return To Idle (Light Braking D4 To D3)

TROUBLE DIAGNOSIS FOR SYMPTOMS


Engine Speed Does Not Return to Idle (Light Braking D4 to D3)


SYMPTOM:
Engine speed does not smoothly return to idle when A/T shifts from D4 to D3 on "Cruise Test -- Part
1".

DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. CONSULT-III Function (A/T) or Diagnosis Procedure Without CONSULT-III .
Is any malfunction detected by self-diagnostic results?
YES - Check the malfunctioning system. CONSULT-III Function (A/T) or Diagnosis Procedure Without CONSULT-III .
NO - GO TO 2.
2.CHECK ACCELERATOR PEDAL POSITION SENSOR
Check accelerator pedal position sensor. P2138 (HR16DE), P2138 (MR18DE).
OK or NG
OK - GO TO 3.
NG - Repair or replace accelerator pedal position sensor.
3.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 5.
NG - GO TO 4.
4.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Service and Repair .
2. Check the following items:
- Overrun clutch control valve
- Overrun clutch reducing valve
- Overrun clutch solenoid valve
3. Disassemble A/T. Disassembly .
4. Check the following items:
- Overrun clutch assembly. Forward And Overrun Clutches .
OK or NG
OK - GO TO 6.
NG - Repair or replace damaged parts.
5.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Service and Repair .
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. Cruise Test - Part 1 .
OK or NG
OK - INSPECTION END
NG - GO TO 7.
7.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.