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• When Monitored: • Set Condition: Possible Causes INTERMITTENT DTC FUEL INJECTOR HIGH-SIDE CONTROL CIRCUIT SHORTED TO VOLTAGE FUEL INJECTOR LOW-SIDE CONTROL CIRCUIT SHORTED TO VOLTAGE FUEL INJECTOR HIGH-SIDE CONTROL CIRCUIT OPEN OR HIGH RESISTANCE FUEL INJECTOR LOW-SIDE CONTROL CIRCUIT OPEN OR HIGH RESISTANCE FUEL INJECTOR ENGINE CONTROL MODULE (ECM) Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. DTC IS ACTIVE NOTE: This DTC can set as a result of a fault in any of the injector circuits. Be sure to check all injector With the scan tool, Clear DTCs in the Engine Control Module (ECM). Attempt to start the engine and test drive the vehicle. 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. FUEL INJECTOR HIGH-SIDE CONTROL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect each Fuel Injector connector. Disconnect the Engine Control Module (ECM) connector. Remove the ASD Relay. Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay Connector. Turn the ignition on. Measure the voltage of each Fuel Injector High-Side Control circuit in the Fuel Injector connector. Is there voltage present on any of the circuits? Yes >> Repair the Fuel Injector High-Side Control circuit for a short to voltage. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go to 3 9 - 1740 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |