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5. (K668) INLET AIR PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE Measure the resistance of the (K668) Inlet Air Pressure Sensor 5 Volt Is the resistance below 10.0 ohms? Yes >> Go to 10 No >> Repair the (K668) Inlet Air Pressure Sensor 5 Volt Supply circuit for an open circuit or high resistance. Perform the ECM Verification Test Ver. 1. (Refer to 9 - 6. INLET AIR PRESSURE SENSOR Turn the ignition on. With the scan tool, Clear DTCs. With the scan tool, select View DTCs. NOTE: The scan tool should display an Inlet Air Pressure Sensor high voltage or open DTC with the Inlet Air Does the scan tool display the DTC(s) as described above? Yes >> Replace the Inlet Air Pressure Sensor in accordance with the Service Information. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go to 7 7. (K68) INLET AIR PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the Engine Control Module (ECM) connector. Measure the resistance between ground and the (K68) Inlet Air Pres- Is the resistance above 1000.0 ohms? Yes >> Go to 8 No >> Repair the (K68) Inlet Air Pressure Sensor Signal circuit for a short to ground. Perform the ECM Verification Test Ver. 1. (Refer to 9 - 9 - 1164 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |