[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 7: Starting Impossible (Initial Combustion But No Complete Combustion), Improper Starting (Long Time to Start) | PRINT PAGE / INDEX / PRIOR / NEXT

Inspection Procedure 7: Starting Impossible (Initial Combustion But No Complete Combustion), Improper Starting (Long Time to Start)
COMMENT ON TROUBLE SYMPTOM Failure is possibly caused by poor ignition, incorrect air-fuel ratio at cranking, improper fuel pressure or other faults.
PROBABLE CAUSE Failed battery Failed ignition system Failed fuel system Air-fuel ratio control Failed idle speed control system Failed intake system Failed exhaust gas cleaning system Throttle valve fouled around Timing belt not in place Compression pressure improper Failed engine-A/T-ECU
| DIAGNOSIS PROCEDURE
| STEP 1: Check battery condition. Q: Have the battery terminal been disconnected? YES: After warm-up engine, idle for about 10 minutes. NO: Go to Step 2 .
| STEP 2: Check battery voltage. Measure battery voltage at cranking. OK: 8 V or higher Q: Is the check result normal? YES: Go to Step 3 . NO: Check battery (Refer to GROUP 54 - Battery - On-vehicle Service - Battery Test ).
| STEP 3: MUT-II/III diagnosis code Q: Diagnosis code set? YES: Inspection chart for diagnosis codes (Refer to ). NO: Go to Step 4 .
| STEP 4: MUT-II/III data list Refer to Data list reference table . Item 12: Air flow sensor Item 13: Intake air temperature sensor Item 21: Engine coolant temperature sensor Item 95: Manifold absolute pressure sensor Q: Are the check results normal? YES: Go to Step 5 . 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 5: MUT-II/III data list Refer to Data list reference table . Item 25: Barometric pressure sensor Q: Are the check results normal? YES: Go to Step 6 . NO: Replace engine-A/T-ECU.
| STEP 6: Check throttle body (throttle valve) contamination. Q: Is the check result normal? YES: Go to Step 7 . NO: Clean throttle body (throttle valve portion) (Refer to ).
| STEP 7: MUT-II/III actuator test Item 07: Fuel pump OK: Operating sound of fuel pump can be heard. Q: Is the check result normal? YES: Go to Step 8 . NO: Check fuel pump system (Refer to Inspection Procedure 24 ).
| STEP 8: Check air intake from intake hose and inlet manifold. Q: Is the check result normal? YES: Go to Step 9 . NO: Repair.
| STEP 9: Check injector for operating sound. Check injector for operating sound at engine cranking (Refer to ). Q: Can operating sound be heard? YES: Go to Step 10 . NO: Check the injector system of the defective cylinder. (Refer to Code No. P0201: No.1 Injector System ). (Refer to Code No. P0202: No.2 Injector System ). (Refer to Code No. P0203: No.3 Injector System ). (Refer to Code No. P0204: No.4 Injector System ).
| STEP 10. Check timing marks of timing belt. Q: Is the check result normal? YES: Go to Step 11 . NO: Align timing marks.
| STEP 11: Check ignition coil spark. Q: Is the check result normal? YES: Go to Step 12 . NO: Check ignition circuit system (Refer to Inspection Procedure 30 ).
| STEP 12: Check spray condition of injector. Check each injector for spray condition (Refer to ). Q: Is the check result normal? YES: Go to Step 13 . NO: Replace injector.
| STEP 13: Check compression pressure. Check compression pressure (Refer to GROUP 11E - On-vehicle Service - Compression Pressure Check ). Q: Is the check result normal? YES: Go to Step 14 . NO: Repair.
| STEP 14: 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 15 . NO: Replace EGR valve (stepper motor).
| STEP 15: Replace engine-A/T-ECU. After replacing the engine-A/T-ECU, re-check the trouble symptoms. Q: Does trouble symptom persist? YES: Check for foreign matters (water, kerosene, etc.) in fuel and replace if necessary. NO: Check end.

[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 7: Starting Impossible (Initial Combustion But No Complete Combustion), Improper Starting (Long Time to Start) | PRINT PAGE / INDEX / PRIOR / NEXT

©2004 Mitsubishi Motors Corporation