Cumminz

Circuit DescriptionThe intake manifold 1 temperature sensor is a variable resistor sensor and is used to measure the temperature of the air entering the intake manifold of the engine. The engine intake manifold temperature value is used by the ECM for the engine protection system and engine emission control. The engine control module (ECM) supplies 5 volts to the intake manifold temperature signal circuit, and monitors the change in voltage caused by changes in the resistance of the sensor to determine the intake manifold temperature. When the intake air is cold, the sensor (or thermistor) resistance is high. The ECM...

Circuit DescriptionThe water-in-fuel sensor is attached to the fuel filter. The water-in-fuel sensor sends a signal to the engine control module (ECM) when a set volume of water has accumulated in the fuel filter. The water-in-fuel circuit contains two wires, a ground wire and a signal wire. Component LocationThe water-in-fuel sensor is integrated into the bottom of the fuel filter. The filter housing location will vary with each original equipment manufacturer (OEM). Conditions for Running the DiagnosticsThis diagnostic runs continuously when the engine is running. Conditions for Setting the Fault CodesWater has been detected in the fuel filter housing above...

Circuit DescriptionThe sensor supply number 2 pin of the electronic control module (ECM) provides (+) 5-VDC for the camshaft position sensor, exhaust gas pressure sensor, rail fuel pressure sensor, intake manifold pressure/temperature sensor, and crankcase pressure sensor. Component LocationSensor supply number 2 is located in the ECM and provides a 5-VDC SUPPLY to various pressure sensors. Conditions for Running the DiagnosticsThis diagnostic runs continuously when the keyswitch is in the ON position or when the engine is operating. Conditions for Setting the Fault CodesThe ECM detects that the sensor supply 2 signal voltage is less than a calibratible value for...

Circuit DescriptionThe engine control module (ECM) provides a 5 volt supply to the aftertreatment diesel particulate filter differential pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The aftertreatment diesel particulate filter differential pressure sensor provides a signal to the ECM on the aftertreatment diesel particulate filter differential pressure sensor signal circuit. This sensor signal voltage changes based on the differential pressure across the aftertreatment diesel particulate filter. Component LocationThe aftertreatment diesel particulate filter differential pressure sensor is located in the aftertreatment system. Refer to the original equipment manufacturer (OEM) troubleshooting...

Circuit DescriptionThe engine control module (ECM) provides a 5 volt supply to the aftertreatment diesel particulate filter differential pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The aftertreatment diesel particulate filter differential pressure sensor provides a signal to the ECM on the aftertreatment diesel particulate filter differential pressure sensor signal circuit. This sensor signal voltage changes based on the differential pressure across the aftertreatment diesel particulate filter. Component LocationThe aftertreatment diesel particulate filter differential pressure sensor is located in the aftertreatment system. Refer to the OEM troubleshooting and repair manual...