EBD

Electronic Brake Distribution
Specialized software stored in the ABS control module -J104-, called Electronic Brake Distribution (EBD), assumes the function of the brake pressure regulator.

The signal sent to the instrument cluster when ABS fails is pulsed if the EBD function remains operational in emergency mode. The instrument cluster distinguishes between no signal, a pulsed signal, and a steady signal. The ABS/EDL indicator lamp and the red symbol for"Brake system malfunction" will light up accordingly.





1. Terminal 15
2. Signal for controlling the ABS/EDL indicator lamp and the red "brake system malfunction" symbol.
3. Voltage supply for the ABS/EDL indicator lamp.
4. Voltage supply for the red "brake system malfunction" symbol.
A. In interval "A" (with "ignition on") a self-test of the ABS/EDL indicator lamp is carry out for two seconds using signal "2" (lamp lights up). During this interval, the instrument cluster suppresses the red "brake system malfunction" symbol.
B. Signal "2" is not available in interval "B". The ABS/EDL indicator lamp and the red "brake system malfunction" symbol do not light.
C. In interval "C", the On Board Diagnostic recognized a DTC, which did not deactivate the EBD. Signal "2" is pulsed. Only the ABS/EDL indicator lamp comes on.
D. In interval "D", the On Board Diagnostic recognized a DTC, which did deactivate the EBD. Signal "2" is steady. Both the ABS/EDL indicator lamp and the red "brake system malfunction" symbol light up.

The red "brake system malfunction" symbol indicates the EBD is deactivated. The vehicle is only allowed to be driven under restricted conditions; "Road test vehicle".

For additional information about EBD indicator lamp control, see: "Overview of warning lamp functions"; The vehicle version as relates to EBD can be recognized by checking the note column under "Check control module version".