Cruise Control Operation; Speed Control Switches; Setting Cruise Control - Mack Granite GU Series Operator's Handbook Manual

CRUISE CONTROL OPERATION

Note: Effective August 2008, a change was made to the vehicle software which
requires the vehicle operator to press and release the brake pedal after the engine
has been started. If the brake pedal is not depressed after starting the engine, cruise
control will not function.

Speed Control Switches

Resume/Set Switch — Allows the driver to set and resume cruise control.
Note: In most cases, the Speed Control switch must be in the ON position in order
to use the Resume/Set switch. However, when the Initial Set Using Resume Switch
feature is enabled, cruise control can be activated using the Resume/Set switch.
The Resume/Set switch also functions as the Accel/Decel switch. Usually the
Resume position (press the top) corresponds to an increase in engine speed
(Accel) and the Set position (press the bottom) corresponds to a decrease in
engine speed (Decel).
Note: Under specific circumstances this switch can also be used to activate cruise
control. For details concerning the Initial Set Using Resume Switch feature, refer to
the V-MAC Support Software User's Guide.
Speed Control Switch — Activates the cruise control system.

Setting Cruise Control

1. Press and release the brake pedal after engine has been started.
2. Engage the clutch (if equipped).
3. Move the Speed Control switch to the ON position.
4. Increase engine speed using the accelerator pedal.
5. At the desired speed, press and release the Resume/Set switch. This
speed is now programmed and will be automatically maintained.
Note: To increase the engine speed, press and hold the Accel switch until the desired
speed is attained, or press the accelerator pedal until the desired speed is attained
and then press and release the Set switch.
OPERATION 149