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Circuit DescriptionUnder ordinary operating conditions, the real-time clock in the electronic control module (ECM) is powered by the vehicle’s batteries. If battery power to the ECM is lost, the real-time clock will be powered by a battery in the engine harness (if equipped). Component LocationThe real-time clock battery is secured to the engine harness near the ECM. Conditions for Running the DiagnosticsThis diagnostic runs continuously when the keyswitch is in the ON position. Conditions for Setting the Fault CodesThe real-time clock in the ECM lost power. Action Taken When the Fault Code is Active-The ECM illuminates the amber CHECK ENGINE...

Circuit DescriptionThe aftertreatment outlet nitrogen oxides (NOx) sensor is a smart device and receives commands from the engine electronic control module (ECM) via the J1939 data link. The aftertreatment outlet NOx sensor performs its own internal diagnostics and reports malfunctions back to the primary ECM using the J1939 data link. The NOx sensor is permanently attached to the NOx control module. They are serviced as single component and can not be replaced individually. The aftertreatment outlet NOx sensor is used to measure the outlet NOx emissions from the engine. Component LocationThe aftertreatment outlet NOx sensor location can vary depending on...

Circuit DescriptionThe aftertreatment outlet mono-nitrogen oxides (NOx) sensor is a smart device that receives commands from the engine control module (ECM) via the J1939 data link. The aftertreatment outlet NOx sensor performs its own internal diagnostics and reports malfunctions back to the primary ECM using the J1939 data link. The NOx sensor is permanently attached to the NOx control module. They are serviced as single component and can not be replaced individually. The aftertreatment outlet NOx sensor is used to measure the outlet NOx emissions from the engine. Component LocationThe aftertreatment outlet NOx sensor location can vary, depending on engine...

Circuit DescriptionThe sensor supply 5 of the engine control module (ECM) provides a 5 volt supply for the remote accelerator, coolant level sensor, accelerator position sensor 2, and aftertreatment diesel particulate filter differential pressure sensor. Component LocationSensor supply number 5 is located in the ECM OEM harness connector and provides a 5 volt supply to various components in the OEM harness. Conditions for Running the DiagnosticsThis diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running. Conditions for Setting the Fault CodesThe ECM detects that the sensor supply 5 signal voltage is greater...

Circuit DescriptionThe sensor supply 5 of the engine control module (ECM) provides a 5 volt supply for the remote accelerator, engine coolant level sensor, the accelerator position sensor 2, the fan speed sensor (if equipped), the aftertreatment diesel exhaust fluid tank level/temperature sensor (on some engines), and the aftertreatment diesel particulate filter differential pressure sensor (if equipped). Component LocationSensor supply number 5 is located in the ECM OEM harness connector and provides a 5 volt supply to various components in the OEM harness. Conditions for Running the DiagnosticsThis diagnostic runs continuously when the keyswitch is in the ON position or...