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3. (K312) EGR AIRFLOW CONTROL VALVE POSITION SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE NOTE: The jumper wire should still be in place. Is there any voltage present? Yes >> Repair the (K312) EGR Airflow Control Valve Position Sen- sor Signal circuit for a short to voltage. Perform the ECM Verification Test Ver. 1. (Refer to 9 - No >> Go to 4 4. (K390) EGR AIRFLOW CONTROL VALVE RETURN CIRCUIT SHORTED TO VOLTAGE NOTE: The jumper wire should still be in place. Is there any voltage present? Yes >> Repair the (K390) EGR Airflow Control Valve Return circuit for a short to voltage. Perform the ECM Verification Test Ver. 1. (Refer to 9 - No >> Go to 5 5. EGR AIRFLOW CONTROL VALVE Turn the ignition off. Remove the jumper wire and install the ASD Relay. Connect the Engine Control Module (ECM) connector. Connect a jumper wire between the (K390) EGR Airflow Control Valve Return circuit and the (K312) EGR Airflow Turn the ignition on. With the scan tool, Clear DTCs. With the scan tool, select View DTCs. NOTE: The scan tool should display an EGR Airflow Throttle Position Sensor low voltage or short to ground Does the scan tool display the Sensor DTC(s) as described above? Yes >> Replace the EGR Airflow Control Valve in accordance with the Service Information. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go to 6 9 - 1392 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |