Subaru 2002 Impreza Service Manual page 471

CRUISE CONTROL
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Cruise Control System
1. Cruise Control
A: OPERATION
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The cruise control system automatically controls the vehicle speed. It allows the vehicle to run
at a constant speed without need for the driver to keep the accelerator pedal depressed.
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When the driver has activated the system and made a desired speed setting, the cruise control
module compares the actual vehicle speed detected by the speed sensor (MT) or transmission
control module (AT) with the preset speed in the memory, then generates a signal according to
the difference between the two speeds.
This signal is transmitted to the actuator located in the engine compartment.
The actuator operates the throttle cam as necessary to keep the preset vehicle speed.
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