Cruise Control (appearance will vary) A cruise control system is used to control and maintain a consistent vehicle speed with the help of an electronic throttle or vacuum actuator which is connected to the engine throttle (older models).
Throttle Actuator An electronic throttle actuator is controlled by the main computer which has recorded the desired setting from the driver.
Vehicle Speed Sensor VSS When the brake or clutch pedal is used the cruise control is released allowing the driver to slow the vehicle, using the resume button will cause the vehicle to return to the last recorded set speed (MPH).
Push Brake Pedal Down Helpful Information A laser or radar control system is known as an autonomous cruise control, or adaptive cruise control which sets the distance between cars. When the distance setting is compromised the vehicle speed is automatically decreased, then holds an alternative speed until the distance increases. A warning light is illuminated on the dash to alert the driver and is used to avoid collisions. History A cruise control system is also known by alternative names such as auto-cruise and speed control. A mechanical engineer by the name of Ralph Teetor in 1945, invented the Speedostat, which is a version of the modern cruise control system. The idea was conceptualized when Ralph observed a rotating drive shaft. Having knowledge of electronics he devised a counter and throttle actuator which was connected to the engine, throttle position was varied by the vacuum actuator. These first cruise control systems consisted of a control unit, drive shaft, control switch, brake cutoff switch, vacuum servo, wiring harness and vacuum lines. Common Problems
- Brake pedal cutoff switch can become maladjusted causing the cruise control not to engage.