Circuit DescriptionThe variable geometry turbocharger (VGT) is electronically activated by the VGT actuator. The VGT actuator is a smart device and receives information via the J1939 data link from the primary engine control module (ECM). The VGT actuator performs its own diagnostics and reports malfunctions back to the primary engine ECM, using the J1939 data link. The ECM then decodes the error message and converts it to a fault code. Component LocationThe VGT actuator is located on the turbocharger bearing housing. Conditions for Running the DiagnosticsThis diagnostic runs 5 minutes after engine start up if coolant temperature is greater than...

Circuit DescriptionThe engine aftertreatment system monitors the soot load in the aftertreatment diesel particulate filter. Under normal operating conditions, the aftertreatment diesel particulate filter is self-cleaning, where soot is converted to carbon dioxide, nitrogen, and water. Under light load operating conditions, it can be necessary to perform a stationary regeneration of the aftertreatment diesel particulate filter. The soot load in the aftertreatment diesel particulate filter is estimated, using the aftertreatment differential pressure sensor and the calculated soot output of the engine. Component LocationThe aftertreatment diesel particulate filter is located in the exhaust system and is installed by the original equipment...

Circuit DescriptionThe engine aftertreatment system monitors the soot load in the aftertreatment diesel particulate filter. Under normal operating conditions, the aftertreatment diesel particulate filter is self-cleaning, where soot is converted to carbon dioxide, nitrogen, and water. Under light load operating conditions, it can be necessary to perform a stationary regeneration of the aftertreatment diesel particulate filter. The soot load in the aftertreatment diesel particulate filter is estimated, using the aftertreatment differential pressure sensor and the calculated soot output of the engine. Component LocationThe aftertreatment diesel particulate filter is located in the exhaust system and is installed by the original equipment...

Circuit DescriptionThe aftertreatment fuel shutoff valve is used to disable the fuel supply to the aftertreatment system. Component LocationThe aftertreatment fuel injector is installed in the exhaust system in the turbocharger adapter pipe. The aftertreatment fuel pressure sensor and aftertreatment fuel shutoff valve are installed in the shutoff valve manifold. The aftertreatment purge air actuator is located above the shutoff valve manifold. Conditions for Running the DiagnosticsThis diagnostic runs when the aftertreatment fuel shutoff valve is commanded on. Conditions for Setting the Fault CodesThe Engine Control Module (ECM) detected the aftertreatment fuel shutoff valve pulse width modulated (PWM) signal was...

Circuit DescriptionThe aftertreatment fuel shutoff valve is used to disable the fuel supply to the aftertreatment system. Component LocationThe aftertreatment fuel injector is installed in the exhaust system in the turbocharger adapter pipe. The aftertreatment fuel pressure sensor and aftertreatment fuel shutoff valve are installed in the shutoff valve manifold. The aftertreatment purge air actuator is located above the shutoff valve manifold. Conditions for Running the DiagnosticsThis diagnostic runs when the aftertreatment fuel shutoff valve is commanded off. Conditions for Setting the Fault CodesThe Engine Control Module (ECM) detected the aftertreatment fuel shutoff valve pulse width modulated (PWM) signal was...