MBE 900 ENGINE 2007 OPERATOR'S GUIDE The engine will only operate at reduced rpm until the battery voltage reaches a point where the MCM will no longer function and the engine shuts down. Stop Engine Override Switch This feature allows the operator to override the automatic stop engine sequence. This is done by pressing the Stop Engine Override Switch every 15 to 20 seconds to prevent engine shutdown from occurring. Should the AWL (Check Engine) come on for any reason, the vehicle can still be operated and the driver can proceed to the required destination. This condition should be reported to an authorized Detroit Diesel distributor or dealer. NOTE:
The Stop Engine Override Switch and the Diagnostic Request Switch are the same. NOTICE: NOTE: Holding down the Stop Engine Override Switch will not prevent the engine shutdown sequence. You must continue to reset the automatic shutdown system by pressing the Stop Engine Override Switch at intervals of approximately 15 to 20 seconds. When the RSL (Stop Engine) comes on, the computer has detected a major malfunction in the engine that requires immediate attention. It is the operator's responsibility to shut down the engine to avoid serious damage. The engine can be configured to give a warning only, to ramp down (reduce power) or to shut down.
Ramp down will reduce engine rpm to a pre-determined speed, but will not shut down the engine. With the 30-second shutdown option, the engine will begin a 30-second, stepped power-down sequence until it shuts down completely. It takes 30 seconds from the time the automatic shutdown sequence begins until engine shutdown. Therefore, the operator must press the override switch just prior to engine shutdown and continue to do so until the vehicle can be brought to a stop in a safe location. A “Stop Engine Override” can be procured in case the vehicle is to operate in a critical location. All information subject to change without notice. (Rev.
04/08) 47 DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION