Parking Brake System: Description and Operation

Electronic Parking Brake






1 - Parking Brake Contact Switch (F321)

The switch is always illuminated so it can be found in the dark.

• Pulls the close button => "set parking brake".

• Press the => open button. It is necessary to press the foot brake.

• Component location: in center console

• Removing and Installing => [ Electro-Mechanical Parking Brake Switch ] Electro-Mechanical Parking Brake Switch

2 - LED (light emitting diode)

• Component location: In the parking brake 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. 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 - Electro-mechanical 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 right brake caliper

• Removing and Installing => [ Electro-Mechanical Parking Brake Actuator ] Service and Repair

• Brake Caliper, Removing and Installing => [ Rear Brake Caliper with Brake Carrier ] Rear Brake Caliper With Brake Carrier

6 - Electro-Mechanical Parking Brake Control Module (J540)

• 9 Nm

• Component location: in the right rear side panel behind the side trim

• Removing and Installing => [ Electro-Mechanical Parking Brake Control Module J540 ] Service and Repair

7 - Electrical parking brake actuator with left brake caliper

• Removing and Installing => [ Electro-Mechanical Parking Brake Actuator ] Service and Repair

• Brake Caliper, Removing and Installing => [ Rear Brake Caliper with Brake Carrier ] Rear Brake Caliper With Brake Carrier

8 - Acoustic Signal

• Warning if it is operated while driving greater than 7 km/h.

• Warning when a malfunction is detected in the system.