Operators Manual

Table Of Contents
Idle Shutdown Timer
This feature is an optional 1-80 minute idle shutdown system. Its purpose is to
conserve fuel by eliminating excessive idling and allowing a turbocharger cool-
down period. To activate the shutdown, the transmission must be in neutral with the
vehicle parking brakes set and the engine in idle or fast-idle mode.
Accelerating the Vehicle
Engine response versus pedal movement may feel different from the mechanical-
governed engine you were driving. The Accelerator Pedal (AP) was designed to
communicate 'percentage' foot pedal travel to the engine's Motor Control Module
(MCM). The engine will respond accordingly to the driver's demand.
Another throttle or governor characteristic you may need time to get used to is the
DDEC Limiting Speed Governor. This allows the driver to command total engine
response between idle and rated speed, such as accelerating at half throttle - an
advantage when driving under slippery conditions.
If you require wide-open throttle engine response, either accelerating or just plain
pulling hard, the throttle AP will have to be held to the floor. To obtain 100%
fueling at any speed, the AP will have to be maintained at the fully pressed
position.
Cruise Control
For added driver convenience and comfort, DDEC also features a Cruise Control
option that works just like the system in your car. It can be operated in any gear
above 1100 rpm or road speed faster than 20 mph (32 kph), up to the rated engine
speed. It also can be programmed to hold your road speed at or below the
maximum vehicle speed. The switch to energize Cruise Control is usually mounted
on the instrument panel or steering wheel.
Detroit Diesel Electronic Controls (DDEC) System
72 All information subject to change without notice.
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