System Description

DESCRIPTION
The speed control system is electrically controlled and vacuum operated. The control lever on the steering column incorporates a slide switch which has three positions: Off/On, Resume/Accel and Set/Decel. The Set button is located at the end of the three position slide switch. The system is designed to operate at speeds exceeding 35 MPH.

OPERATION
The engine controller monitors critical input and output circuits within the speed control system, making sure they are operating correctly. If a problem is sensed by the controller often enough to be considered a malfunction, it is stored in the controller memory in the form of a diagnostic trouble code message. These messages are short descriptions of a defective condition that exists or of a certain circuit experiencing a malfunction. If the problem is repaired or ceases to occur, the controller will cancel the message after 50 ignition key On/Off cycles.

To engage the speed control when desired speed is achieved, depress and release the Set button to engage the system. Speed will be maintained at this level. Moving the slide switch from Off to On position while vehicle is in motion establishes memory without system engagement.

To disengage speed control, a normal brake application or soft tap on the brake pedal will disengage system without erasing speed memory. Moving the slide switch to Off position also disengages the system, but will erase the speed memory.