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Symptom List: P2100-FUEL PUMP RELAY CIRCUIT OPEN CIRCUIT Test Note: All symptoms listed above are diagnosed using the same tests. The title for the tests will be P2100-FUEL PUMP RELAY POSSIBLE CAUSES INTERMITTENT CONDITION ENGINE CONTROL RELAY OUTPUT CIRCUIT OPEN FUEL LIFT PUMP RELAY FUEL LIFT PUMP RELAY CONTROL CIRCUIT SHORTED TO GROUND FUEL LIFT PUMP RELAY CONTROL CIRCUIT OPEN ENGINE CONTROL MODULE TEST ACTION APPLICABILITY 1 NOTE: If the ECM detects and stores a DTC, the ECM also stores the t, erase the ECM DTCs. Crank and attempt to start the engine several times. t, read the active ECM DTCs. Did this DTC set again? All Yes → Go To 2 No → Go To 6 2 Turn the ignition off. All Yes → Go To 3 No → Refer to Checking the ECM Power and Grounds for the related symptom(s). 157 DRIVEABILITY - DIESEL |