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• When Monitored: • Set Condition: Possible Causes ECM - FUEL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE ECM - FUEL PRESSURE SENSOR SIGNAL OPEN FUEL PRESSURE SENSOR SIGNAL CIRCUIT OPEN FUEL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE SENSOR GROUND CIRCUIT OPEN FUEL PRESSURE SENSOR 5-VOLT SUPPLY CIRCUIT OPEN FUEL PRESSURE SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE FUEL PRESSURE SENSOR ENGINE CONTROL MODULE Diagnostic Test 1. CHECKING FOR CURRENT DTC WARNING: THE FUEL INJECTION PUMP SUPPLIES HIGH-PRESSURE FUEL TO EACH INDIVIDUAL INJEC- NOTE: If DTC P0641, P0651 or P0697 is present with this DTC, diagnose DTCs P0641, P0651 or P0697 before NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may With the scan tool, erase ECM DTCs. Cycle the ignition key on and off several times, leaving the key on for at least 10 seconds at a time. With the scan tool, read ECM DTCs. Did this DTC set again? Yes >> Go To 2 No >> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 9 - 794 ENGINE DIESEL DIAG KJ |