ESP function: EBD
The two brake circuits are split diagonally. One circuit supplies the left-front and right-rear brakes with appropriate hydraulic pressure, the other supplies the right-front and left-rear.
Matched software in the ABS Control Module (w/EDL) -J104-, Electronic Brake Distribution (EBD) carries out the function of the mechanical/hydraulic brake pressure regulator.
The signal sent to the instrument cluster when the ABS fails is pulsed, if the EBD function continues in emergency mode. The instrument cluster distinguishes between no signal, a pulsed signal, and a steady signal. The ABS/EDS indicator light and the red symbol for "Brake system malfunction" light accordingly.
- Terminal 15
- Signal for controlling the ABS/EDL indicator light and the red brake warning symbol
- Voltage supply for the ABS/EDL indicator light
- Voltage supply for the red brake warning symbol
- In interval "A" (with "ignition on(" a self-test of the ABS/EDL indicator light is carried out for two seconds using signal "2" (light lights up). During this interval, the instrument cluster suppresses the red brake warning symbol.
- Signal "2" is not available in interval "B." The ABS/EDL indicator light and the red brake warning symbol do not light.
- 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 light comes on.
- In interval "D", the On Board Diagnostic recognized a DTC, which did deactivate the EBD. Signal "2" is steady. The ABS/EDL indicator light and the red brake warning symbol light.
The red brake warning symbol indicates the EBD is deactivated. The vehicle is only allowed to be driven under restricted conditions. Test Drive the vehicle, see TEST DRIVE .
For additional information about EBD indicator light control, see: "Indicator light functions, overview". See INDICATOR LIGHT FUNCTIONS, OVERVIEW .