Cumminz

Circuit DescriptionThe injector solenoid valves are actuated by the engine control module (ECM) to control fuel metering and timing. Each injector solenoid is connected to the ECM by a SUPPLY and a RETURN wire. An electrical pulse is sent to the injector from the ECM on the SUPPLY wire and returns to the ECM on the RETURN wire, after actuating the solenoid. Each electric solenoid valve is normally open and is only closed by an electrical pulse from the ECM during fuel injection and metering. Component LocationThe injectors pass through the top of the rocker lever cover. Each injector has...

Circuit DescriptionThe injector solenoid valves are actuated by the engine control module (ECM) to control fuel metering and timing. Each injector solenoid is connected to the ECM by a SUPPLY and a RETURN wire. An electrical pulse is sent to the injector from the ECM on the SUPPLY wire and returns to the ECM on the return wire, after actuating the solenoid. Each electric solenoid valve is normally open and is only closed by an electrical pulse from the ECM during fuel injection and metering. Component LocationThe injectors pass through the top of the rocker lever cover. Each injector has...

Circuit DescriptionThe injector solenoid valves are actuated by the engine control module (ECM) to control fuel metering and timing. Each injector solenoid is connected to the ECM by a SUPPLY and a RETURN wire. An electrical pulse is sent to the injector from the ECM on the SUPPLY wire and returns to the ECM on the return wire, after actuating the solenoid. Each electric solenoid valve is normally open and is only closed by an electrical pulse from the ECM during fuel injection and metering. Component LocationThe injectors pass through the top of the rocker lever cover. Each injector has...

Circuit DescriptionThe injector solenoid valves are actuated by the engine control module (ECM) to control fuel metering and timing. Each injector solenoid is connected to the ECM by a SUPPLY and a RETURN wire. An electrical pulse is sent to the injector from the ECM on the SUPPLY wire and returns to the ECM on the RETURN wire, after actuating the solenoid. Each electric solenoid valve is normally open and is only closed by an electrical pulse from the ECM during fuel injection and metering. Component LocationThe injectors pass through the top of the rocker lever cover. Each injector has...

Circuit DescriptionThe coolant level sensor is a switch and is used to measure the level of the engine coolant in the radiator top tank. The coolant level sensor is immersed in the coolant and returns a different signal voltage when immersed in coolant versus being out of coolant. The engine control module (ECM) monitors the change in the signal voltage to determine the level of the engine coolant. Component LocationThe engine coolant level sensor is typically located in the radiator top tank or surge tank. Refer to the OEM service manual for the location. Conditions for Running the DiagnosticsThis diagnostic...