[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 10: The Engine Stalls when Decelerating | PRINT PAGE / INDEX / PRIOR / NEXT

Inspection Procedure 10: The Engine Stalls when Decelerating
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 1. MUT-II/III diagnosis code Q: Diagnosis code set? YES: Inspection chart for diagnosis code (Refer to ). NO: Go to Step 2 .
| 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).
| STEP 4. Check throttle body (throttle valve portion) for contamination. Q: Is the check result normal? YES: Go to Step 5 . NO: Clean throttle body (throttle valve portion) (Refer to ).
| STEP 5. Check ignition coil spark. Q: Is the check result normal? YES: Replace engine-A/T-ECU. NO: Check ignition circuit system (Refer to Inspection Procedure 30 ).

[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 10: The Engine Stalls when Decelerating | PRINT PAGE / INDEX / PRIOR / NEXT

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