The control module registers the current speed from the vehicle speed sensor. It attempts to maintain this speed until a change is desired. The cancel function deactivates the system, and the coast function allows the vehicle to slow for upcoming traffic or turns. It’s like tapping the brake pedal.

How do I know if my cruise control module is bad?

Common signs include speed surges and inability to maintain speed on cruise control, as well as general engine performance issues.

What causes the cruise control to stop working?

When the fuse of for the cruise control blows, the cruise control will stop working altogether. … A vehicle’s cruise control may stop working if the vacuum actuator has stopped working or if there is damage to the vacuum hoses. The system may also fail if the cable linking the actuator to the throttle is broken.