High Temperature Re-Clamp
After heavy use of the brakes the disc temperatures can be extremely high. At high brake disc temperatures, if the vehicle is stationary and the park brake is applied, the ABS control module automatically re-applies the park brake as the brake discs cool down. A temperature model in the ABS control module software calculates the brake disc temperature from brake application force, the time the brake force is applied and vehicle speed.
High temperature re-clamp occurs at brake disc temperatures of 250°C (482°F) and above, or at any temperature when parked on a 20% slope or steeper. Depending on the temperature and tilt angle up to three re-clamps can occur, at varying time intervals, in the 10 minutes following the initial application of the park brake. To limit the number of re-clamps, the ignition status as well as the current tilt angle of the vehicle is considered.