Detroit Diesel Electronic Controls System Whenever the Check Engine or Stop Engine Indicator comes on, the DDEC ® system will identify the fault and store this information in its memory. If the malfunction is intermittent, the warning indicator will come on and go off as the system senses the changing engine condition. Stop Engine Override The engine shutdown feature is designed to prevent engine damage from occurring and extending the engine run time during an engine shutdown can cause engine damage. The Stop Engine Override feature allows the operator to override the automatic stop engine sequence.
Only use the Stop Engine Override during emergency situations where moving the vehicle to a safe location is critical. It should not be used for extended periods of time. DDEC®, will record the number of times the override is activated after an engine fault occurs. A Stop Engine Override is used to override the engine shutdown sequence. This override resets the 60 second (30 second for oil pressure) shutdown timer, restoring power to the level when the Stop Engine Indicator was illuminated. The Stop Engine Override switch must be recycled after five seconds to obtain a subsequent override. Continuously activating the Stop Engine Override will not prevent the engine shutdown sequence.
It takes 30 seconds from the time the automatic shutdown sequence begins until engine shutdown. Therefore, the operator must select the override just prior to engine shutdown and continue to do so until the vehicle can be brought to a stop in a safe location. Once the vehicle is in a safe location do not continue to run the engine. The operator has the responsibility to take action to avoid equipment damage. Engine Power Reduction and Shutdown During engine power reduction an engine power ramp down will reduce engine power to a predetermined value, but will not shut down the engine. With the shutdown option, the engine will begin a stepped power down sequence until it shuts down completely.
The engine should not be restarted after it has been shut down by the engine protection system, unless the problem has been located and corrected. It is the operator's responsibility to shut down the engine to avoid serious damage. Detroit Diesel Electronic Control System Features Detroit Diesel Electronic Control System Features The electronic control system called Detroit Diesel Electronic Control® (DDEC®) offers a variety of features and options designed to alert the operator of any engine, aftertreatment, and transmission (if equipped with DT12) malfunctions. Options 38 All information subject to change without notice. Copyright © 2022 DETROIT DIESEL CORPORATION DDC-SVC-MAN-0217