[13B] MULTIPORT FUEL INJECTION (MPI) <4G64> - - 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 Q: Is the check result normal? YES: Go to Step 3 . NO: Check throttle position sensor system (Refer to Code No. 14 ).
| 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. 24 ).
| 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.

[13B] MULTIPORT FUEL INJECTION (MPI) <4G64> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 10. The Engine stalls when Decelerating | PRINT PAGE / INDEX / PRIOR / NEXT

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