COMMENT ON TROUBLE SYMPTOM
- Engine stall on deceleration is possibly caused by insufficient air intake, improper air-fuel ratio due to failed exhaust gas recirculation system or other faults.
PROBABLE CAUSE
- Failed idle speed control system
- Failed ignition system
- Failed emission control system
- Throttle valve fouled
- Failed engine-A/T-ECU
DIAGNOSIS PROCEDURE
STEP 2. MUT-II/III data list
- Refer to Data list reference table
.
- Item 14: Throttle position sensor (sub)
- Item 77: Accelerator pedal position sensor (sub)
- Item 78: Accelerator pedal position sensor (main)
- Item 79: Throttle position sensor (main)
Q: Is the check result normal?
YES:
Go to Step 3 
.NO: Perform the diagnosis code classified check procedure for the sensor that has shown an abnormal data value (Refer to Inspection Chart for Diagnosis Code
).STEP 3. Check EGR valve (stepper motor) itself.
- Check EGR valve (stepper motor) itself [Refer to GROUP 17 -
Emission
Control System -
Exhaust Gas Recirculation (EGR) System -
EGR Valve (Stepper
Motor) Check <4G69>
].
Q: Is the check result normal?
YES:
Go to Step 4 .NO: Replace EGR valve (stepper motor).