Paccar

Reason:Aftertreatment Diesel Exhaust Fluid Line Heater 1 Circuit – Voltage below normal, or shorted to low source. Low signal voltage detected at the diesel exhaust fluid line heater 1 circuit. Effect:Possible reduced engine performance. Circuit Description:The aftertreatment diesel exhaust fluid line heaters are used to defrost and/or prevent freezing of the diesel exhaust fluid lines. Component Location:The aftertreatment diesel exhaust fluid line heater 1 is located on the supply line between the diesel exhaust fluid dosing unit and the diesel exhaust fluid dosing valve. Conditions for Running the Diagnostics:This diagnostic runs when the keyswitch is in the ON position and...

Reason:Aftertreatment SCR Intake Temperature – Data Valid But Above Normal Operational Range – Most Severe Level. The SCR intake temperature sensor reading has exceeded the maximum engine protection temperature limit. Effect:Progressive power and/or speed derate increasing in severity from time of alert. If the Engine Protection Shutdown feature is enabled, the engine will shut down 30 seconds after the red STOP lamps starts flashing. Circuit Description:The aftertreatment SCR (selective catalytic reduction) temperature sensor module is a smart device that communicates with the engine control module via the J1939 data link. The aftertreatment SCR temperature sensor module performs its own internal...

Reason:Injector Solenoid Driver Cylinder 5 Circuit – Current Below Normal or Open Circuit. Current detected a injector 5 when voltage is turned OFF. Effect:Possible reduced engine performance Circuit Description:The injector solenoid valves control fueling quantity and injection timing. The engine control module (ECM) energizes the solenoid by closing a high-side and a low-side switch. Each injector circuit has a dedicated low side switch that completes the circuit path to ground inside the ECM. Component Location:The engine harness connects the ECM to the pass-through connector(s) that are located in the rocker housing. Internal injector harnesses are located under the valve cover...

Reason:Aftertreatment SCR Intake Temperature – Data Valid But Above Normal Operating Range – Moderately Severe Level. The SCR intake temperature sensor reading has exceeded the maximum temperature limit. Effect:Progressive power and/or speed derate increasing in severity from time of alert. If the Engine Protection Shutdown feature is enabled, the engine will shut down 30 seconds after the red STOP lamps starts flashing. Circuit Description:The aftertreatment SCR (selective catalytic reduction) temperature sensor module is a smart device that communicates with the engine control module via the J1939 data link. The aftertreatment SCR temperature sensor module performs its own internal diagnostics and...

Reason:Aftertreatment SCR Intake Temperature – Data Valid But Above Normal Operating Range – Moderately Severe Level. The SCR intake temperature sensor reading has exceeded the maximum temperature limit. Effect:Progressive power and/or speed derate increasing in severity from time of alert. If the Engine Protection Shutdown feature is enabled, the engine will shut down 30 seconds after the red STOP lamps starts flashing. Circuit Description:The aftertreatment SCR (selective catalytic reduction) temperature sensor module is a smart device that communicates with the engine control module via the J1939 data link. The aftertreatment SCR temperature sensor module performs its own internal diagnostics and...