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MPI - Troubleshooting 13A-39 Code No. P0403 EGR control solenoid valve system Probable cause Inspection Range The battery voltage is 10 V or more. Evaluation Conditions Solenoid coil’s surge voltage (battery voltage +2 V) is not detected when EGR control solenoid valve is turned OFF from ON. D EGR control solenoid valve malfunction D EGR control solenoid valve circuit disconnection, short-circuit, or connector contact defect D Engine-ECU malfunction OK To the next page OK Check the harness between the EGR control solenoid valve and engine-ECU. Check for damage of the output cable. NG Repair OK Check the following connector: C-126 NG Repair OK Check and repair the harness between the EGR control solenoid valve and engine-ECU. Check for disconnection and short-circuit of the output cable. OK Measure at the C-126 engine-ECU connector. Disconnect the connector to measure at the harness side D Ignition switch: ON D Voltage between terminal No. 6 and earth OK: System voltage NG Check the following connectors: B-14, C-126 NG Repair OK Check and repair the harness between the EGR control solenoid valve and engine control relay. Check for disconnection and short-circuit of the power cable. OK Measure at the B-112 EGR control solenoid valve connector. Disconnect the connector to measure at the harness side. D Ignition switch: ON D Voltage between terminal No. 1 and earth OK: System voltage NG Check the following connectors: B-11X, B-14 NG Repair OK Measure at the B-112 EGR control so- lenoid valve connector. Disconnect the connector to measure at the solenoid valve side. D Resistance between terminal No. 1 and terminal No. 2 OK: 29 - 35 Ω (at 20_C) NG Replace the EGR control solenoid valve. NG Check the following connector: B-112 NG Repair MUT-II Actuator test No.10: EGR control solenoid valve OK: Operation sound is heard, and there is vibration. OK Intermittent malfunction (Refer to GROUP 00 - Points to Note for Intermittent Malfunctions.) |