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4. BOOST PRESSURE SENSOR SHORTED TO GROUND Ensure all connectors are reconnected. Turn the ignition off. Disconnect the Boost Pressure Sensor harness connector. Turn the ignition on. Measure the voltage of the Boost Pressure Sensor 5-Volt Supply circuit. Is the voltage above 4.6 volts? Yes >> Replace the Boost Pressure Sensor. Perform the ECM Verification Test Ver. 1 (Refer to 9 - No >> Go To 5 5. 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the Boost Pressure Sensor harness connector. Disconnect the Fuel Pressure Sensor harness connector. Disconnect the Mass Air Flow Sensor harness connector. Disconnect the ECM harness connectors. Measure the resistance between ground and the Mass Air Flow Sensor Is the resistance above 1000 ohms? Yes >> Go To 6 No >> Repair the 5-Volt Supply circuit for a short to ground. Perform the ECM Verification Test Ver. 1 (Refer to 9 - 6. WIRING INSPECTION Turn the ignition off. Inspect the Boost Pressure Sensor 5-Volt supply circuit between the Boost Pressure Sensor harness connector and Inspect the Mass Air Flow Sensor #1 5-Volt supply circuit between the Mass Air Flow Sensor harness connector and Inspect the Fuel Pressure Sensor 5-Volt supply circuit between the Fuel Pressure Sensor harness connector and Were any problems found? Yes >> Repair shorted circuit as necessary. Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). No >> Replace and program the Engine Control Module in accordance with the Service Information. Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). 9 - 1146 ENGINE DIESEL DIAG KJ |