[13A] MULTIPORT FUEL INJECTION (MPI) <4G63> - - 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 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 Q: Is the check result normal? YES: Go to Step 3 . NO: Check throttle position sensor system (Refer to Code No. P0120 ).
| STEP 3. MUT-II/III data list Item 45: Idle speed control servo position OK: Idle speed control servo drops to 0 - 2 steps at deceleration (engine at 1,000 r/min or higher). Q: Is the check result normal? YES: Go to Step 4 . NO: Check vehicle speed signal system (Refer to Code No. P0500 ).
| STEP 4. Check EGR control solenoid valve itself. Check EGR control solenoid valve itself [Refer to GROUP 17 - Emission Control System - Exhaust Gas Recirculation (EGR) System]. Q: Is the check result normal? YES: Go to Step 5 . NO: Replace EGR control solenoid valve.
| STEP 5. Check EGR valve itself. Check EGR valve itself [Refer to GROUP 17 - Emission Control System - Exhaust Gas Recirculation (EGR) System ]. Q: Is the check result normal? YES: Go to Step 6 . NO: Replace EGR valve.
| STEP 6. Check throttle body (throttle valve portion) for contamination. Q: Is the check result normal? YES: Go to Step 7 . NO: Clean throttle body (throttle valve portion) (Refer to ).
| STEP 7. Connector check: B-110 and B-111 ignition coil connectors
| Q: Is the check result normal? YES: Go to Step 8 . NO: Repair.
| STEP 8. Check ignition coil spark. Q: Is the check result normal? YES: Replace engine-A/T-ECU. NO: Go to Step 9 .
| STEP 9. Check spark plug. Q: Is the check result normal? YES: Go to Step 10 . NO: Replace spark plug.
| STEP 10. Check spark plug cable itself. Check spark plug cable itself (Refer to GROUP 16 - Ignition System - On-vehicle Service ). Q: Is the check result normal? YES: Go to Step 11 . NO: Replace spark plug cable.
| STEP 11. Check ignition coil itself. Check ignition coil itself (Refer to GROUP 16 - Ignition System - On-vehicle Service ). Q: Is the check result normal? YES: Go to Step 12 . NO: Replace ignition coil.
| STEP 12. Check harness between terminal No. 2 of ignition coil connector of each cylinder and body earth.
| Check earthing line for open circuit and damage. Q: Is the check result normal? YES: Check and repair harness between terminal No. 3 of ignition coil connector of each cylinder and C-112 engine-A/T-ECU. Check signal line for open/short circuit and damage. NO: Repair.

[13A] MULTIPORT FUEL INJECTION (MPI) <4G63> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 10. The Engine Stalls when Decelerating | PRINT PAGE / INDEX / PRIOR / NEXT

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