2010 JAGUAR XFR Workshop Manual

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Page 641 of 3039

JAGUAR XFR 2010 1.G Workshop Manual
8. WARNING: If the brake caliper piston seal is damaged a
new brake caliper must be installed.

CAUTION: Do not allow the brake caliper to hang on
the brake hose.

NOTE: Left-hand shown, r

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JAGUAR XFR 2010 1.G Workshop Manual
10.

11. NOTE: Left-hand shown, right-hand similar.

Special Tool(s): 303-588 Special Tool(s): 206-080 Special Tool(s): 206-081 Using the special tool

Page 643 of 3039

JAGUAR XFR 2010 1.G Workshop Manual Published: 11-May-2011
Rear Disc Brake - TDV6 3.0L Diesel /V8 5.0L Petrol/V8 S/C 5.0L Petrol - Brake
Disc Shield
Removal and Installation

Removal

WARNING: Make sure to support the vehicle wit

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JAGUAR XFR 2010 1.G Workshop Manual Parking brake module retaining bolts 4 - 35 Parking brake release actuator retaining bolts 20 15 -

Page 645 of 3039

JAGUAR XFR 2010 1.G Workshop Manual Published: 11-May-2011
Parking Brake and Actuation - Parking Brake - Component Location
Description and Operation
Component Location

Page 646 of 3039

Page 647 of 3039

JAGUAR XFR 2010 1.G Workshop Manual Published: 11-May-2011
Parking Brake and Actuation - Parking Brake - System Operation and
Component Description
Description and Operation

Control Diagram

NOTE: A = Hardwired; D = High speed C

Page 648 of 3039

JAGUAR XFR 2010 1.G Workshop Manual
7 Instrument cluster 8 Parking brake switch 9 Parking brake actuator

Static Apply System Operation

The EPB module receives a vehicle speed signal from the ABS (anti-lock brake system) modul

7 Instrument cluster 8 Parking brake switch 9 Parking brake actuator

Static Apply System Operation

The EPB module receives a vehicle speed signal from the ABS (anti-lock brake system) module on the high speed CAN bus. If the parking brake switch is pulled to the 'Apply' position and vehicle speed is less than 2 mph (3 km/h), the EPB module will
instigate its 'Static Apply' mode and drive the actuator to apply full parking brake force to the rear wheels.

The EPB module monitors the current drawn by the actuator and compares this to information held within its configuration
software to determine when full braking force has been applied.

Dynamic Apply

There are two 'Dynamic Apply' modes; low speed dynamic and high speed dynamic. The low speed dynamic mode operates at
speeds between 2 mph (3 km/h) and 20 mph (32 km/h). The high speed dynamic mode operates at speeds above 20 mph (32
km/h).

If the parking brake switch is pulled up to the 'Apply' position and vehicle speed is within the low speed dynamic range, the
EPB module drives the actuator to apply full parking brake force to the rear wheels.

If the parking brake switch is pulled up to the 'Apply' position and vehicle speed is within the high speed dynamic range, the
EPB module will apply braking force to the rear wheels at a slower rate until full braking load is reached or the switch is
released. The rate with which braking force is applied is controlled by the EPB module, which monitors both current drawn by
the actuator and positional information from the actuator hall sensor and compares this to information held within its
configuration software.

Drive Away Release

The EPB module will initiate its 'Drive Away Release' function and automatically release the parking brake if the following
conditions are detected:
The engine is running.
Drive , or reverse is selected.
Positive throttle movement is detected.

The EPB module receives messages of gear selector position and throttle angle over the high speed CAN bus from the TCM (transmission control module) and the ECM (engine control module) respectively.

Release from Park

The EPB module will initiate its 'Release from Park' function and automatically release the parking brake if the gear selector is
moved from Park to any position except Neutral.

Repairs

Before carrying out any work on the parking brake system, the Jaguar approved diagnostic system must be connected and the
'parking brake unjam' routine run. The routine can be found in the 'Vehicle Configuration' area, under the 'Set-up and
Configuration' menu. After any work has been carried out on the parking brake, the system will require resetting.

CAUTION: Do not use the 'Emergency Release' tool to allow work to be carried out on the parking brake. Work can only be
carried out on the parking brake system after the 'parking brake unjam' routine has been run.

Resetting

If the electrical supply is disconnected from the EPB module, the actuator will loose its position memory. On battery
re-connection and ignition on, 'APPLY FOOT AND PARK BRAKE' will be displayed in the instrument cluster message center
indicating the parking brake requires resetting.
Refer to: Parking Brake (206-05, Diagnosis and Testing).

Operating Voltages

The EPB module will only operate the actuator if the power supply from the battery is between 9 V and 16 V. At any voltage
within this range, the actuator is able to fully tighten and release the brake cables. If the power supply falls outside of the
range, a fault code is stored in the EPB module and can be retrieved using the Jaguar approved diagnostic system.

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