Cumminz

Circuit DescriptionThe turbocharger compressor intake temperature sensor is a variable resistor sensor and is used to measure the temperature of the air entering the compressor intake of the turbocharger. The engine control module (ECM) supplies 5 volts to the compressor intake temperature signal circuit. The ECM monitors the change in voltage caused by changes in the resistance of the sensor to determine the air temperature. Component LocationSome engines use a combination ambient air temperature/pressure sensor located in the OEM intake air plumbing rather than a turbocharger compressor intake temperature sensor. Refer to the engine wiring diagram to determine which sensor...

Circuit DescriptionThe engine control module (ECM) has an internal temperature sensor that is used to measure the temperature inside the ECM. Conditions for Running the DiagnosticsThis diagnostic runs continuously when the keyswitch is in the ON position. Conditions for Setting the Fault CodesThe ECM detects that the internal temperature sensor circuit is shorted high. Action Taken When the Fault Code is Active-The ECM illuminates the amber CHECK ENGINE light immediately after the diagnostic runs and fails. Conditions for Clearing the Fault Code-To validate the repair, start the engine and let it idle for 1 minute.-The ECM will turn off the...

Circuit DescriptionThe engine control module (ECM) has an internal temperature sensor that is used to measure the temperature inside the ECM. Conditions for Running the DiagnosticsThis diagnostic runs continuously when the keyswitch is in the ON position. Conditions for Setting the Fault CodesThe ECM detects that the internal temperature sensor circuit is shorted to ground. Action Taken When the Fault Code is Active-The ECM illuminates the amber CHECK ENGINE light immediately after the diagnostic runs and fails. Conditions for Clearing the Fault Code-To validate the repair, start the engine and let it idle for 1 minute.-The ECM will turn off...

Circuit DescriptionThe engine control module (ECM) has an internal temperature sensor that is used to measure the temperature inside the ECM. Conditions for Running the DiagnosticsThis diagnostic runs continuously when the keyswitch is in the ON position. Conditions for Setting the Fault CodesThe ECM detects that the internal temperature sensor circuit is irrational. Action Taken When the Fault Code is ActiveThe ECM illuminates the amber CHECK ENGINE light immediately when the diagnostic runs and fails. Conditions for Clearing the Fault Code-To validate the repair, start the engine and let it idle for 1 minute.-The ECM will turn off the amber...

Circuit DescriptionThe crankshaft position and camshaft position sensors are Hall effect type sensors. The engine control module (ECM) provides a +5 volt supply to the position sensor and a return circuit. As the teeth on the crankshaft speed ring or the lobes on the camshaft gear move past the position sensor, a signal is generated on the position sensor signal circuit. The ECM interprets this signal and converts it to an engine speed. A missing tooth on the crankshaft gear is used to determine the position of the engine by the ECM. Conditions for Running the DiagnosticsThis diagnostic runs continuously...