Description & Operation: Notes

CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

CAUTION: Do not use the cruise control when driving in heavy or varying traffic, or on slippery (rainy, icy, or snow-covered) winding roads.

CAUTION: To avoid accidental cruise control engagement, keep the main switch off when not using the cruise control.

Your cruising speed can be maintained up or down grades within the limits of engine performance, although a slight speed change may occur when driving up or down the grades. On steeper hills, a greater speed change will occur, so it is better to drive without the cruise control.

When the main switch is turned on, and the set switch is pushed in with the vehicle speed within 25-124 MPH (40-200 KM/H), a signal is put out to the computer. The vehicle speed at that time is recorded in the computer memory as the set speed. The computer compares the recorded set speed with the actual vehicle speed input from the speed sensor, and controls the cruise control actuator in order to maintain the set vehicle speed.

When the actual vehicle speed is lower than the set speed, the computer lengthens the period of current flow from the computer, to the actuator, to the control valve, to the computer. The cable is pulled in the direction for opening the throttle valve and the vehicle speed increases. When the actual speed is higher than the set speed, a shorter period of current flow to the control valve returns the cable in the direction for closing the throttle valve and the vehicle speed decreases.

When the cruise control system operates, current flows from the computer to the release valve, closing the atmospheric intake port.

When there is continuity to the control valve, a vacuum is activated inside the actuator. When there is no continuity, the vacuum intake stops and the atmosphere is introduced. The actuator is controlled by changing the ratio of continuity and non-continuity to the control valve within a specified period of time.