34 00 012 Parking brake functional check (Countryman 2017-2023, except PHEV)
Drive vehicle onto brake test stand
The parking brake control unit utilizes a plausibility check (wheel RPM comparison) to detect the brake test stand within a few seconds and switches to brake test stand mode.
The parking brake indicator light flashes slowly when brake test stand mode is activated and EMF actuators are released.
Actuate parking brake switch = application of brake pads.
The parking brake indicator light flashes quickly when brake test stand mode is activated and EMF actuators are partially locked.
Operate electromechanical parking brake-switch = test load 1.
Actuate parking brake switch again = test force 2
Actuate parking brake switch again = test force 3
The parking brake is released again when the button is actuated in the Release direction.
The parking brake indicator light is permanently activated when brake test stand mode is not detected and EMF actuators are fully locked.
The brake test stand mode is automatically terminated when the vehicle is driven off the brake test stand.
Assessment :
- The sum of both wheel braking forces needs to be equal to or greater than 16 % of the permissible gross vehicle weight of the vehicle.
- The maximum permitted brake force differential right/left must not exceed 95 % (referred to the greater brake value).