Engine Protection—Warning and Shutdown
The driver should be familiar with the vehicle warning system in order to bring the vehicle to a safe stop if the engine malfunctions. If the driver doesn't understand how the warning system works, an engine shutdown could occur.
The engine will begin a warning and shutdown process if the engine coolant temperature, coolant level, engine oil pressure, or exhaust aftertreatment system (ATS) reach preset levels. On some engines, the engine will also begin the warning and shutdown process when the engine oil temperature or the intake air temperature reach preset levels. Detroit Diesel engines will begin the warning and shutdown process if water is detected in the fuel.
See the engine manufacturer's operation manual for specific details for your vehicle.
See Greenhouse Gas Emissions and Fuel Consumption Standards for the warning and shutdown modes associated with the ATS.
Electronic engine protection is programmable as an option, and can be specified as one of the following modes: DERATE and SHUTDOWN (factory default), WARNING, or OFF.
Warning: When the STOP engine or CHECK engine lamp illuminates, most engines are programmed to shut down automatically within 30 seconds. The driver must immediately move the vehicle to a safe location at the side of the road to prevent causing a hazardous situation that could cause bodily injury, property damage, or severe damage to the engine.
In DERATE and SHUTDOWN mode, the red STOP engine lamp will illuminate when the problem is serious enough to reduce power or speed. See Fig.. Engine power will ramp down, then the engine will shut down if the problem continues while in derate mode. The driver has 30 or 60 seconds (depending on the critical fault type) after the STOP engine lamp illuminates to move the vehicle safely off the road. If the vehicle cannot be moved to a safe location within that time, turn the ignition switch to OFF for at least five seconds, then restart the engine. Repeat this action until the vehicle is safely off the road.
Do not operate the vehicle further until the problem causing the shutdown has been corrected.
-
Malfunction Indicator Lamp (MIL)
-
CHECK Engine Lamp
-
STOP Engine Lamp
Fig. 1, Engine Warning Lamps
Some vehicles may have a shutdown-override switch, which can be used to momentarily override the shutdown sequence. This switch resets the shutdown timer, restoring power to the level before the derate for another 30 or 60 seconds (depending on the critical fault type). The switch must be pressed again after five seconds to obtain a subsequent override.
In WARNING mode, the amber CHECK engine lamp will flash and a buzzer will sound. The engine electronics log the event for diagnostic purposes. The CHECK engine lamp will go out if the problem stops.
In OFF mode, the individual sensor indicator lamps will illuminate if a problem exists, but no shutdown action will be started and the event will not be recorded.