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MPI - Troubleshooting 13A-67 Inspection Procedure 10 Engine stalls during deceleration Probable cause Causes shown on right are suspected. D Idle speed control system malfunction D Exhaust gas purifier system malfunction D Throttle valve malfunction D Engine-ECU malfunction NG Replace the engine-ECU. OK Check the trouble symptoms. OK End OK Check the EGR valve for sticking. (Refer to GROUP 17 - Exhaust Gas Purifier Check.) NG Replace the EGR valve. OK Check the EGR control solenoid valve. (Refer to GROUP 17 - Exhaust Gas Purifier Check.) NG Replace the EGR control solenoid valve. NO Check the throttle body (throttle valve section) for contamination. NG Clean the throttle body (throttle valve section). (Refer to P.13A-126.) OK MUT-II Data list No. 45: Idle speed control (servo) position D Does the idle speed control (servo) position drop to 0 to 2 steps during deceleration (engine rotation speed 1000 r/min or more)? YES Check the Code No. P0500: Vehicle speed sensor system. (Refer to P.13A-43.) NO MUT-II Data list No. 14: Throttle position sensor (Refer to P.13A-103.) NG Check the Code No. P0120: Throttle position sensor system. (Refer to P.13A-21.) NO MUT-II Self-Diag code Is a diagnosis code output? YES INSPECTION CHART FOR DIAGNOSIS CODE (Refer to P.13A-12.) Has the battery terminal been disconnected recently? YES After warming up the engine, idle for approximately 10 minutes. |