LS2 V6-3.0L VIN R (2000)
Brake Switch (Cruise Control): Description and Operation
Cruise Brake Switch
The cruise brake switch disables the cruise control function when the brake pedal is pressed. If the vehicle has the cruise control option, then a cruise
brake switch can be found on the brake pedal. When the brake pedal is pressed, this switch opens, and a signal is sent to the ECM to disable the cruise.
The cruise brake switch is normally closed supplying 12 volts when the ignition is On and the brake is Off. A Scan tool should display ON when the
brake pedal is depressed and should read OFF with brake pedal released.
The cruise brake switch consists of battery voltage sent through a brake switch to the ECM. When the brake is not applied, the brake circuit sends
voltage to the ECM. As the brake is depressed (voltage is removed), the ECM will disengage the cruise function. The cruise/brake switch acts as a
redundant disable for the cruise when the brake is applied. If the ECM detects a brake circuit fault, the cruise will disable. If the cruise brake switch is
stuck closed when the vehicle has cycled two times from 0-34 mph (0-55 km/h) and vehicle speed decreases more than 2.5 mph (4 km/h) per second,
cruise will be released.
