Land Rover Discovery Owners & Service Manuals

Land Rover Discovery: Parking Brake and Actuation / Description and Operation

Land Rover Discovery (2009–2016) Service Manual / Chassis / Chassis-Brake-System / Parking Brake and Actuation / Description and Operation



Right Hand Drive (RHD) illustration shown, Left Hand Drive (LHD) illustration similar

Parking brake and actuation description and operation

  1. Integrated Anti-lock Brake System (ABS) control module and Hydraulic Control Unit (HCU)
  2. Instrument Cluster (IC)
  3. Right Electric Park Brake (EPB) actuator
  4. Left EPB actuator
  5. EPB switch


The Electric Park Brake (EPB) is an electrically actuated system that operates the calipers on the rear brakes. The system consists of:

  • An EPB switch
  • Two EPB actuators
  • Clutch pedal position sensor (manual transmission vehicles only)
  • Two warning indicators
  • Anti-lock Brake System (ABS) control module

The EPB is controlled by the ABS control module, which uses the EPB actuators to apply and release the rear disc brakes. Operation of the EPB is initiated by the EPB switch and software within the ABS control module. The EPB has the following operating modes:

  • Static apply/release
  • Ignition off apply (manual transmission vehicles only)
  • Drive away release
  • Automatic transmission apply/release
  • High temperature re-clamp
  • Driver exit warning
  • Dynamic apply
  • Roll away re-clamp

Signals from other vehicle systems for operation of the EPB are transmitted to the ABS control module on the High Speed (HS) Controller Area Network (CAN) chassis systems bus and the HS CAN powertrain systems bus.


Electric park brake switch

Electric park brake switch

  1. Release park brake
  2. Apply park brake

The resistive ladder type switch has four hardwired connections with the ABS control module, consisting of two apply circuits and two release circuits. This enables the ABS control module to perform a plausibility check on each switch selection.

The park brake is manually applied and released using the EPB switch, which is located in the floor console, behind the selector lever. Pulling the switch lever upwards applies the park brake. Pushing the switch lever down releases the park brake.



  1. Brake caliper
  2. Spindle
  3. Seal
  4. EPB actuator
  5. Screws
  6. Output shaft

The EPB actuators are electro-mechanical positioning units attached to the calipers of the rear brakes. Each actuator incorporates a reversible Electric motor driving an output shaft via a worm drive gear.

The output shaft of the EPB actuator is engaged in the splined end of a spindle, which is inside the caliper piston and screwed into a ball screw drive. Operation of the Electric motor turns the spindle and produces linear movement of the ball screw drive, to apply a target clamp load to the brake pads.


 Clutch Pedal Position Sensor (Manual Ransmission Vehicles Only)

The clutch pedal position sensor provides the ABS control module with a continuous measure of clutch pedal position. The clutch pedal position sensor is attached to the clutch master cylinder. The

 Parking Brake and Actuation - Operation

Operation When the park brake is applied with the EPB switch, the ABS control module uses the wheel speed inputs to determine when to use the static and dynamic modes of operation. It uses the static

 Parking Brake and Actuation / Diagnosis and Testing

PRINCIPLES OF OPERATION For a detailed description of the Parking Brake, refer to the relevant Description and Operation section in the workshop manual. REFER to: Parking Brake (206-05 Parking Brake a


 Telematics Control Module (TCU)

Battery cover Battery pack Battery tray Electrical connector GPS antenna connector GSM antenna connector Telematics Control Module The TCU is located in the right rear corner of the luggage compartment, behind the trim panel. For security reasons the TCU is located in a position that is

 Third Row Seat Cushion Cover (G1808262) / Removal and Installation

REMOVAL NOTES: Some variation in the illustrations may occur, but the essential information is always correct. Removal steps in this procedure may contain installation details. Refer to: Third Row Seat (501-10, Removal and Installation). INSTALLATION NOTES: Make sure that new hog ri

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