For a complete wiring diagram Refer to Section 8WThe Fuel Quantity Solenoid (FQS) is a solenoid operated valve designed to regulate fuel volume to the fuel injection pump. The FQS valve is positioned in the inlet side of the fuel injection pump assembly. The solenoid receives 12–volt power and a duty-cycle ground signal from the ECM. When the solenoid is not actuated (no ground signal from the ECM), the fuel injection pump inlet passage is open allowing full fuel flow to the pump chamber. When the ECM grounds the FQS control signal the solenoid valve closes the fuel inlet passage, preventing fuel from entering the pump chamber.When Monitored:With the ignition on and the ECM command of the Fuel Quantity Solenoid off.Set Condition:The ECM does not detect voltage on the (K365) Fuel Quantity Solenoid Control circuit for 0.2 seconds.Possible CausesINTERMITTENT DTC(K365) FUEL QUANTITY SOLENOID CONTROL CIRCUIT SHORTED TO VOLTAGE(K365) FUEL QUANTITY SOLENOID CONTROL CIRCUIT SHORTED TO GROUND(K365) FUEL QUANTITY SOLENOID CONTROL CIRCUIT SHORTED TO (K366) FUEL QUANTITY SOLENOID 12 VOLT SUPPLY CIRCUIT(K365) FUEL QUANTITY SOLENOID CONTROL CIRCUIT OPEN OR HIGH RESISTANCE(K366) FUEL QUANTITY SOLENOID 12 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCEFUEL QUANTITY SOLENOIDENGINE CONTROL MODULE (ECM)Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)1. DTC IS ACTIVEIgnition on, engine not running.With the scan tool, Clear DTCs in the Engine Control Module (ECM).With the scan tool, actuate the Fuel Quantity Solenoid at 100%.Monitor the scan tool for at least two minutes.With the scan tool, select View DTCs.Is the status Active for this DTC?YesGo To 2 NoRefer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure.(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)2. (K365) FUEL QUANTITY SOLENOID CONTROL CIRCUIT SHORTED TO VOLTAGE

Turn the ignition off.Disconnect the Fuel Quantity Solenoid harness connector.Disconnect the Engine Control Module (ECM) harness connector.Remove the ASD Relay from the TIPM.Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.Turn the ignition on.Measure the voltage of the (K365) Fuel Quantity Solenoid Control circuit in the Fuel Quantity Solenoid harness connector.Is there any voltage present?YesRepair the (K365) Fuel Quantity Solenoid Control circuit for a short to voltage.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo to 33. (K365) FUEL QUANTITY SOLENOID CONTROL CIRCUIT SHORTED TO GROUND

Turn the ignition off.Measure the resistance between ground and the (K365) Fuel Quantity Solenoid Control circuit in the Fuel Quantity Solenoid harness connector.Is the resistance above 1000 ohms?YesGo to 4NoRepair the (K365) Fuel Quantity Solenoid Control circuit for a short to ground.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)4. (K365) FUEL QUANTITY SOLENOID CONTROL CIRCUIT SHORTED TO (K366) FUEL QUANTITY SOLENOID 12 VOLT SUPPLY CIRCUIT

Measure the resistance between the (K365) Fuel Quantity Solenoid Control circuit and the (K366) Fuel Quantity Solenoid 12 Volt Supply circuit in the Fuel Quantity Solenoid harness connector.Is the resistance above 1000 ohms?YesGo to 5NoRepair the (K365) Fuel Quantity Solenoid Control circuit for a short to the (K366) Fuel Quantity Solenoid 12 Volt Supply circuit.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)5. (K365) FUEL QUANTITY SOLENOID CONTROL CIRCUIT OPEN OR HIGH RESISTANCE

Measure the resistance of the (K365) Fuel Quantity Solenoid Control circuit between the Fuel Quantity Solenoid harness connector and the Engine Control Module (ECM) harness connector.Is the resistance below 10.0 ohms?YesGo to 6NoRepair the (K365) Fuel Quantity Solenoid Control circuit for an open circuit or high resistance.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)6. (K366) FUEL QUANTITY SOLENOID 12 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE

Measure the resistance of the (K366) Fuel Quantity Solenoid 12 Volt Supply circuit between the Fuel Quantity Solenoid harness connector and the Engine Control Module (ECM) harness connector.Is the resistance below 10.0 ohms?YesGo to 7NoRepair the (K366) Fuel Quantity Solenoid 12 Volt Supply circuit for an open circuit or high resistance.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)7. FUEL QUANTITY SOLENOID

Connect the Engine Control Module (ECM) harness connector.Turn the ignition on.With the scan tool, actuate the Fuel Quantity Solenoid (CP3 Metering Pump) to 100%.Using a 12 volt test light connected to 12 volts, check the (K365) Fuel Quantity Solenoid Control circuit in the Fuel Quantity Solenoid harness connector.The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.The circuit will remain actuated by the controller for 30 seconds. Be certain the actuation is active when checking the circuit.Is the test light illuminated and bright with the actuation at 100%?YesReplace the Fuel Quantity Solenoid in accordance with the Service Information.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo to 88. ENGINE CONTROL MODULE (ECM)Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Fuel Quantity Solenoid and the Engine Control Module (ECM).Look for any chafed, pierced, pinched, or partially broken wires.Look for broken, bent, pushed out or corroded terminals.Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.Look for the data to change or for the DTC to reset during the wiggle test.Refer to any Technical Service Bulletins that may apply.Were any problems found?YesRepair as necessary.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoReplace the Engine Control Module (ECM) in accordance with the Service Information.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)