Auxiliary Functions
Speed-sensitive power steering sub-function: The control module uses the ground speed and status signal to calculate the current required to control the speed-sensitive power steering P-valve (Y10).
Brake Assist (BAS) sub-function: The conditioned input signals are processed in the logic component and a BAS braking sequence is initiated if required (see BAS control module, function).
Wheel speed outputs: Systems which require a wheel speed signal are provided with the current wheel speed from each wheel by the ESP control module. Speed status signal output: Systems which require information on the current status of the vehicle (vehicle stationary, vehicle in motion, RPM sensor defective) are provided with the speed status signal by the ESP control module.
Indicator lamp actuation: The ESP control module receives the signals from the brake lining wear contacts and the parking brake. These signals, together with the signals for the ABS and ESP indicator and warning lamps, are passed on to the instrument cluster via a serial data line (via the CAN data line in vehicles with a CAN connection on the instrument cluster).