Static Apply
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The parking brake control module receives a vehicle speed signal from the ABS module on the high speed CAN bus. If the parking brake switch is pulled to the 'Apply' position and vehicle speed is less than 2 mph (3 km/h), the control module will instigate its 'Static Apply' mode and drive the actuator to apply full parking brake force to the rear wheels.
The parking brake control module monitors the current drawn by the actuator and compares this to information held within its configuration software to determine when full braking force has been applied.