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• When Monitored: • Set Condition: Possible Causes INTERMITTENT DTC (K31) FUEL PUMP CONTROL CIRCUIT SHORTED TO GROUND (K31) FUEL PUMP CONTROL CIRCUIT OPEN OR HIGH RESISTANCE TOTALLY INTEGRATED POWER MODULE Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, Clear DTCs in the Engine Control Module (ECM). With the scan tool, actuate the Fuel Pump. Monitor the scan tool for at least two minutes. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes >> Go To 2 No >> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 2. (K31) FUEL PUMP CONTROL CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the TIPM C2 harness connector. Disconnect the Engine Control Module (ECM) harness connectors. Measure the resistance between ground and the (K31) Fuel Pump Con- Is the resistance above 10k ohms? Yes >> Go to 3 No >> Repair the (K31) Fuel Pump Control circuit for a short to ground. Perform the ECM Verification Test Ver. 1. (Refer to 9 - PM ENGINE ELECTRICAL DIAGNOSTICS - DIESEL 9 - 1243 |