Location
Shown on vehicle with code J6C (Multimedia cockpit, interactive) |
A10b | Electronic brake system control unit (EBS) |
W42.25-A017-81
The electronic brake system control unit is installed in the electronics compartment at the top on the front passenger side.
Task
The electronic brake system control unit is the central component of the electronic brake system (EBS) and has the following tasks:
Recording the driver's brake request via the electrical signals of the brake value sensor (B17).
Calculate the specified brake pressures of the individual axles or the semi-trailer/trailer depending on the sensor data and taking into account the brake force distribution and wear harmonization.
Actuation of the following components with the corresponding electrical signals to apply the specified brake pressures:
Front axle modulator (A20)
Rear axle modulator (A21)
Left front axle ABS solenoid valve (Y1)
Right front axle ABS solenoid valve (Y2)
Trailer control valve, WABCO (Y6)
Evaluate the feedback from the brake components during the entire brake application and readjust the brake pressure if necessary.
Control the ABS or ASR interventions.
Communication with other systems/control units in the vehicle via the frame CAN (CAN 3).
Actuation of electronically braked trailers via the ISO-11992 interface of the ABS trailer socket, 7-pin (X103.7).
Actuation of the air admission 3/2-way valve (Y5) or of the ASR solenoid valve 2 (Y5a) for ASR suppression of the leading axle/trailing axle for 3-axle vehicles.
Control the function of the hill holder.
Performing system diagnosis.
Storing system errors for diagnosis.
Reporting major faults via the display section in the instrument cluster control unit (ICUC) (A1) on vehicles with code J6A (Classic cockpit) or in the instrument cluster screen (ICS) control unit (A153) on vehicles with code J6B (Multimedia cockpit) or code J6C (Multimedia cockpit, interactive).