Cumminz

Circuit DescriptionThe aftertreatment diesel exhaust fluid temperature sensor is used by the electronic control module (ECM) to monitor the temperature of the aftertreatment diesel exhaust fluid inside the diesel exhaust fluid tank. The ECM monitors the voltage on the signal pin and converts this to a temperature value. Component LocationThe aftertreatment diesel exhaust fluid temperature sensor is located in the diesel exhaust fluid tank. Location of the tank and temperature sensor is OEM dependent. Refer to the OEM service manual for more information. Conditions for Running the DiagnosticsThis diagnostic runs at initial key on and continuously when the keyswitch is...

Circuit DescriptionThe aftertreatment diesel exhaust fluid temperature sensor is used by the electronic control module (ECM) to monitor the temperature of the aftertreatment diesel exhaust fluid inside the diesel exhaust fluid tank. The ECM monitors the voltage on the signal pin and converts this to a temperature value. Component LocationThe aftertreatment diesel exhaust fluid temperature sensor is located in the diesel exhaust fluid tank. Location of the tank and temperature sensor is OEM dependent. Refer to the OEM service manual for more information. Conditions for Running the DiagnosticsThis diagnostic runs at initial key on and continuously when the keyswitch is...

Circuit DescriptionThe aftertreatment diesel exhaust fluid dosing unit communicates to the primary engine electronic control module (ECM) through the J1939 data link network. The aftertreatment diesel exhaust fluid dosing unit precisely measures the amount of aftertreatment diesel exhaust fluid to be injected into the aftertreatment system. The aftertreatment diesel exhaust fluid dosing unit has three primary cycles. A priming cycle at initial key on makes sure that aftertreatment diesel exhaust fluid is available at the aftertreatment diesel exhaust fluid dosing unit. During the dosing cycle, aftertreatment diesel exhaust fluid is being delivered to the aftertreatment dosing valve. A purge cycle...

Circuit DescriptionFor an air assisted SCR aftertreatment system, the aftertreatment diesel exhaust fluid dosing unit requires air pressure from the OEM air tanks. The diesel exhaust fluid dosing unit precisely measures the amount of diesel exhaust fluid (DEF or Urea) to be injected into the aftertreatment system. The diesel exhaust fluid dosing unit has three primary cycles. A priming cycle at initial engine start makes sure that diesel exhaust fluid is available at the diesel exhaust fluid dosing unit. During the dosing cycle, the diesel exhaust fluid is being delivered to the aftertreatment nozzle. A purge cycle occurs when the...

Circuit DescriptionThe diesel exhaust fluid dosing unit input lines are responsible for transporting diesel exhaust fluid between the dosing unit, dosing valve, and diesel exhaust fluid tank. Component LocationThere are three diesel exhaust fluid lines. One line is between the dosing unit and dosing valve, and the other two lines are between the dosing unit and diesel exhaust fluid tank. These lines can be partially hidden from view by the SCR system and other vehicle components. Line routing will vary, based on aftertreatment architecture and OEM. Conditions for Running the DiagnosticsThis diagnostic runs when the SCR system is trying to...