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MPI - Troubleshooting 13A-63 Inspection Procedure 8 Unstable idling (Rough idling, hunting), inappropriate idling speed (High or low idling speed), engine stalls (Die out) during idling Probable cause Causes shown on right are suspected. D Idle speed control system malfunction D Air/fuel ratio control system malfunction D Ignition system malfunction D Fuel system malfunction D Intake and exhaust system malfunction D Exhaust gas purifier system malfunction D Throttle valve malfunction D Timing belt malfunction D Improper compression pressure D Engine-ECU malfunction OK To the next page OK MUT-II Data list No. 11: Oxygen sensor (front) (Refer to P.13A-102.) NG Check the Code No. P0130: Oxygen sensor (front) system. (Refer to P.13A-24.) OK Check the throttle body (throttle valve section) for contamination. NG Clean the throttle body (throttle valve section). (Refer to P.13A-126.) OK Check the air intake from the intake hose and intake manifold. NG Repair OK Check the timing marks on the timing belt. NG Align the timing marks on the timing belt. OK MUT-II Data list No. 27: Power steering fluid pressure switch (Refer to P.13A-103.) NG Check the Power steering fluid pressure switch system. (Refer to P.13A-51, PROCEDURE FOR DAIGNOSIS CODE P0551) OK MUT-II Data list No. 45: Idle speed control servo position (Refer to P.13A-105.) NG Check the Idle speed control servo (stepper motor) system. (Refer to P.13A-49 PROCEDURE FOR DIAGNOSIS CODE P0505) NO MUT-II Data list No. 12: Air flow sensor D No. 13: Intake air temperature sensor D No. 14: Throttle position sensor D No. 21: Engine coolant temperature sensor D No. 25: Barometric pressure sensor (Refer to P.13A-102.) <Reference> Proceed to OK if all service data values are correct. Proceed to NG if there is even one abnormal service data value. NG Refer to inspections for diagnosis code of sensor showingabnormal service data. (Refer to P.13A-12.) 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. |