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9. FUEL PRESSURE SENSOR Turn the ignition on, engine off. With the scan tool, read the Fuel Pressure Sensor volts. Is the Fuel Pressure Sensor voltage 0.45 and 0.60 volt? Yes >> Go To 10 No >> Refer to the Service Information Wiring to check Fuel Pressure Sensor circuits. If Fuel Pressure Sensor circuitry is o.k., replace the Fuel Pressure Sensor. 10. CHECK FUEL PRESSURE AT ENGINE CRANKING With the scan tool, read the Fuel Pressure Sensor signal while cranking the engine. Does the Fuel Pressure Sensor signal increase to above 3500 psi (240 bar) within a few seconds after Yes >> Go To 11 No >> Go To 12 11. ENGINE DRIVE CHAINS Refer to the Service Information to ensure the Engine Drive Chains are installed correctly and the camshaft and Were any problems found? Yes >> Repair 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. 12. FUEL PRESSURE SOLENOID Turn the ignition off. Refer to the Service Information and replace the Fuel Pressure Solenoid. Turn the ignition on. With the scan tool, erase the ECM DTC’s. Attempt to start the vehicle. Does the vehicle start and run? Yes >> Repair is complete. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Refer to the Service Information and replace the Fuel Injection Pump assembly. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 9 - 1860 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |