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• When Monitored: • Set Condition: Possible Causes FUEL QUANTITY SOLENOID CIRCUIT(S) SHORTED TO GROUND FUEL QUANTITY SOLENOID CIRCUIT(S) SHORTED TO VOLTAGE FUEL QUANTITY SOLENOID CIRCUIT(S) SHORTED TOGETHER FUEL QUANTITY SOLENOID OPEN CIRCUIT(S) INTERMITTENT CONDITION FUEL QUANTITY SOLENOID ENGINE CONTROL MODULE Diagnostic Test 1. VERIFY CURRENT DTC Turn the ignition on. With the scan tool, erase ECM DTCs. Perform several engine run cycles, turning the ignition off for at least 20 seconds between each engine run cycle. With the scan tool, read the 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) 2. CHECKING FOR OTHER DTCS NOTE: An open ASD power supply to the ECM will cause multiple DTC’s including this DTC to set. NOTE: Check the ECM for other DTC’s. If other DTC’s are set with this DTC refer to the symptom list and If the ECM power and ground circuits are functioning properly continue with this test. Yes >> Go To 3 3. FUEL QUANTITY SOLENOID CIRCUIT(S) OPEN Turn the ignition off. Disconnect the ECM harness connectors. Disconnect the Fuel Quantity Solenoid harness connector. Measure the resistance of each of the Fuel Quantity Solenoid circuits Is the resistance below 10.0 ohms for each measurement? Yes >> Go To 4 No >> Repair the circuit(s) that measured above 10.0 ohms for an open. Perform the ECM Verification Test Ver. 1 (Refer to 9 - 9 - 738 ENGINE DIESEL DIAG KJ |