GHG17 DD Medium Duty Operators Manual Detroit Diesel Electronic Control System Features Changing the Idle Speed The idle speed range of the DD Platform engine is 600 to 900 rpm if the parameters in the CPC are set to the default range. Change the idle speed as follows: 1. Turn the cruise control switch to the ON position. 2. To increase the idle speed, push the RSM/ACC switch until the idle reaches the desired rpm. 3. To decrease the idle speed, push the SET/CST switch until the idle reaches the desired rpm. Stop Engine Override Option The Stop Engine Override Option is used for a momentary override.
The electronic engine control system will record the number of times the override is activated after an engine fault occurs. Engine Brake The engine brake is enabled by a dash-mounted ON/OFF Switch with a separate intensity switch to select (HI/MED/LO or, in some cases HI/LO) braking power. CAUTION: LOSS OF VEHICLE CONTROL To avoid injury from loss of vehicle control, do not activate the Engine Brake system under the following conditions: On wet or slippery pavement, unless the vehicle is equipped with ABS (anti-lock braking system) and you have had prior experience driving under these conditions. When driving without a trailer (bobtailing) or pulling an empty trailer.
If the tractor drive wheels begin to lock or there is fishtail motion after the Engine Brake is activated, deactivate the brake system immediately if this occurs. NOTICE: Do not attempt to "double clutch" the transmission while the engine brake system is turned on. Shifting gears without pressing the clutch or using the engine brake to reduce engine rpm may result in serious powertrain damage. The engine brake will only operate when the accelerator pedal is fully released. Disengaging the clutch will prevent the engine brake from operating. All information subject to change without notice. 35 DDC-SVC-MAN-0192 Copyright © 2017 DETROIT DIESEL CORPORATION