Parking Brake System: Service and Repair

Electromechanical Parking Brake Assembly Overview






1 - Parking Brake Contact Switch (F321)

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

• Pull the close button

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

• Component location: In center console.

• Removing and installing, refer to => [ Parking Brake Contact Switch ] Parking Brake Contact 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 - 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 => [ Electromechanical Parking Brake Motor ] Service and Repair.

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

• Component location: In the right rear side panel behind the side trim.

• Removing and installing, refer to => [ Electromechanical Parking Brake Control Module ] Service and Repair.

• 9 Nm

7 - Electrical Parking Brake Actuator with Brake Caliper

• Removing and installing, refer to => [ Electromechanical Parking Brake Motor ] Service and Repair.

8 - Acoustic Signal

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

• Warning when a malfunction is detected in the system.