System Operation: RWU

The RWU mode is used if the ABS module cannot operate the brakes or achieve a minimum deceleration rate, but still supplies wheel speed signals to the EPB module. The wheel speed inputs allow the EPB module to adjust the clamp load on the rear brakes as necessary to produce maximum deceleration without locking the wheels. When vehicle speed decreases to 2 mph (3 km/h), the EPB module fully applies the parking brake.