Cumminz

Circuit DescriptionNormally, switches, accelerators, and other components are connected to the engine control module (ECM) directly through individual wires. Multiplexing allows those same components to be hard wired to an original equipment manufacturer (OEM) vehicle electronic control unit (VECU) or transmission electronic control unit (ECU) in the cab. Then component values and states from components such as sensors, accelerators, and switches can be transmitted from the OEM VECU to the Cummins® ECM over the SAE J1939 data link. Messages sent from OEM VECUs or transmission ECUs are received by the Cummins® ECM and used for controlling the engine. The Cummins®...

Circuit DescriptionThe aftertreatment diesel exhaust fluid line heater 3 is controlled by the aftertreatment diesel exhaust fluid controller, and receives power through the switch side of the diesel exhaust fluid line heater relay. Component LocationThe aftertreatment diesel exhaust fluid line heater 3 is located on the suction line between the diesel exhaust fluid tank and diesel exhaust fluid dosing unit. Conditions for Running the DiagnosticsThis diagnostic runs when the keyswitch is in the ON position and the heater is commanded on. Conditions for Setting the Fault CodesThe aftertreatment diesel exhaust fluid controller detects that the line heater voltage is above...

Circuit DescriptionThe aftertreatment diesel exhaust fluid line heater 3 is controlled by the aftertreatment diesel exhaust fluid controller, and receives power through the switch side of the diesel exhaust fluid line heater relay. Component LocationThe aftertreatment diesel exhaust fluid line heater 3 is located on the suction line between the diesel exhaust fluid tank and diesel exhaust fluid dosing unit. Conditions for Running the DiagnosticsThis diagnostic runs continuously when the keyswitch is in the ON position. Conditions for Setting the Fault CodesThe aftertreatment diesel exhaust fluid controller detects that the line heater circuit is open or shorted to ground. Action...

Circuit DescriptionThe aftertreatment diesel exhaust fluid line heater 4 is powered and controlled by the aftertreatment diesel exhaust fluid controller. Component LocationThe aftertreatment diesel exhaust fluid line heater 4 is internal to the aftertreatment diesel exhaust fluid dosing unit and can not be serviced separately. Conditions for Running the DiagnosticsThis diagnostic runs when the keyswitch is in the ON position and the heater is commanded on. Conditions for Setting the Fault CodesThe aftertreatment diesel exhaust fluid controller detects that the heater voltage is above a calibratible value. Action Taken When the Fault Code is Active-The electronic control module (ECM) illuminates...

Circuit DescriptionThe aftertreatment diesel exhaust fluid line heater 4 is powered and controlled by the aftertreatment diesel exhaust fluid controller. Component LocationThe aftertreatment diesel exhaust fluid line heater 4 is internal to the aftertreatment diesel exhaust fluid dosing unit and can not be serviced separately. Conditions for Running the DiagnosticsThis diagnostic runs continuously when the keyswitch is in the ON position. Conditions for Setting the Fault CodesThe aftertreatment diesel exhaust fluid controller detects that the heater circuit is open. Action Taken When the Fault Code is Active-The electronic control module (ECM) illuminates the amber CHECK ENGINE lamp and/or the malfunction...