Overview - Electromechanical Parking Brake

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Fig 1: Electromechanical Parking Brake (EPB), Component Overview

Courtesy of AUDI OF AMERICA, LLC

1 -
Parking Brake Contact Switch -F321-

The switch is always illuminated so it can be found in the dark.
- Pull → Close button
- Press the → Open button. The foot brake must be operated.
- Installed location: in the center console
- Removing and installing. Refer to Parking Brake Contact Switch -F321-, REMOVING AND INSTALLING .
2 -
Light Emitting Diode (LED)
- Installed location: in the parking brake contact switch
- lights up when the parking brake is engaged
- Also indicated by the function light in the instrument cluster
  The bars in the switch turn red during dynamic deceleration greater than 7 km/h (4 mph). A audible warning signal also sounds.
3 -
EPB System Malfunction Indicator (Yellow)
- If the parking brake malfunctions, a yellow symbol and the indicator Parking brake! appears in the instrument cluster display.
4 -
Electromechanical Parking Brake Function Lights

The lamp is red
- Clamping force display
- Indicator light comes on when parking brake is closed and ignition is on.
- After switching off ignition, indicator light stays on for about 20 seconds.
- If the parking brake is closed with ignition off, the indicator light comes on for about 20 seconds.
- The indicator light must go out when the parking brake is released.
  The lamp blinks red
  
  If the indicator lamp blinks red continuously after engaging the parking brake, it may be due to the following:
  - the braking force from the parking brake is not sufficient to prevent the vehicle from rolling.
  - the brake temperature is too high.
  If the indicator lamp is blinking red, another method must be used to prevent the vehicle from rolling.
  
  The lamp is green
- Function light with Audi Hold Assist activated
  Additional yellow lamp
- If the parking brake malfunctions, a yellow symbol and the indicator Parking brake! appears in the instrument cluster display.
5 -
Electrical Parking Brake Actuator with Brake Caliper
- Removing and installing. Refer to Left Parking Brake Motor -V282- /Right Parking Brake Motor -V283-, REMOVING AND INSTALLING .
6 -
Electromechanical Parking Brake Control Module -J540-
- Installed location: in the right rear side panel behind the side trim
- Removing and installing. Refer to Electromechanical Parking Brake Control Module -J540-, REMOVING AND INSTALLING .
- 9 Nm
7 -
Electrical Parking Brake Actuator with Brake Caliper
- Removing and installing. Refer to Left Parking Brake Motor -V282- /Right Parking Brake Motor -V283-, REMOVING AND INSTALLING .
8 -
Acoustic Signal
- Warning if it is operated while driving greater than 7 km/h (4 mph).
- Warning when a malfunction is detected in the system.