Cruise Control: Description and Operation

^ To ASCD control unit terminal (5) and
Power is interrupted when:
^ the selector is placed in P or N (A/T models)
^ the clutch pedal is depressed (M/T models) or
^ the brake pedal is depressed.

Outputs
The ASCD actuator controls the throttle drum via the ASCD wire based on inputs from the ASCD control unit. The ASCD actuator consists of a vacuum motor, an air valve, and a release valve.
Power is supplied:
^ from terminal (8) of the ASCD control unit
^ to ASCD pump terminal (1).
Ground is supplied to the vacuum motor:
^ from terminal (9) of the ASCD control unit
^ to ASCD pump terminal (4)
Ground is supplied to the air valve:
^ from terminal (10) of the ASCD control unit
^ to ASCD pump terminal (2).
Ground is supplied to the release valve:
^ from terminal (14) of the ASCD control unit
^ to ASCD pump terminal (3).
When the system is activated, power is supplied:
^ from terminal (13) of the ASCD control unit
^ to combination meter terminal (8) and
^ to A/T control unit terminal (37) (A/T models).
Ground is supplied:
^ to combination meter terminal (31)
^ through body grounds (M13) and (M73)
With power and ground supplied, the CRUISE indicator illuminates.
When vehicle speed is approximately 8 kph (5 mph) below Set speed on A/T models, a signal is sent
^ from terminal (12) of the ASCD control unit
^ to A/T control unit terminal (40).
When this occurs, the A/T control unit cancels overdrive.
After vehicle speed is approximately 3 kph (2 mph) above set speed, overdrive is reactivated.