2010 JAGUAR XFR Engine

rear window heater switch is pressed or the engine stops.

Automatic operation during a journey is initiated when low ambient air temperatures are experienced and the vehicle has been
travelling for a set period of time above a threshold speed. In this instance, no feedback is given to the driver to inform him
the rear window heater is operational (the switch LED is not illuminated). The duration of heater operation is variable depending on the ambient air temperature, vehicle speed and the amount of time the vehicle has been travelling.

Windshield Heater (Where Fitted)

Windshield heater operation is only enabled when the engine is running. The ATC module controls operation of the windshield heater using two relays in the EJB (engine junction box). When windshield heater operation is required, the ATC module broadcasts a message to the CJB on the medium speed CAN bus. On receipt of the message, the CJB energizes the relays by providing a ground path for both relay coils. This allows a battery feed to flow across the relays to power the windshield left
and right heater elements.
There are two modes of windshield heater operation; manual and automatic.

Manual operation is activated by pressing the windshield heater switch on the integrated control panel. When the switch is
pressed, the status LED in the switch illuminates and the windshield heater elements are energized. Manual operation is discontinued when the windshield heater switch is pressed a second time, 5 minutes have elapsed (the heating phase), or the
engine stops. If manual operation is discontinued by the engine stopping, the previous heating phase is resumed if the engine
is re-started within 30 seconds.

There are two variants of automatic operation; automatic operation at the start of a journey and automatic operation during a
journey.

Automatic operation at the start of a journey is initiated if the ambient air temperature is below 5 °C (41 °F). In this instance,
the switch LED is illuminated and the heater elements are energized for 6.5 minutes. Automatic operation is discontinued if the windshield heater switch is pressed or the engine stops.

Automatic operation during a journey is initiated when low ambient air temperatures are experienced and the vehicle has been
travelling for a set period of time above a threshold speed. In this instance, no feedback is given to the driver to inform him
the windshield heater is operational (the switch LED is not illuminated) and the duration of operation is variable depending upon the ambient air temperature, vehicle speed and the amount of time the vehicle has been travelling.

Exterior Mirror Heaters

Operation of the exterior mirror heaters is fully automatic and not controllable by the driver. Exterior mirror heater operation is
determined by ambient air temperature and windshield wiper status. When ambient air temperature reaches a pre-determined
level, the ATC module broadcasts an exterior mirror heating request to the door modules over the medium speed CAN bus. On receipt of this message, the door modules provide feed and ground connections to both exterior mirror heater elements.

The amount of time the exterior mirror heaters are operational increases if the windshield wipers are switched on. This ensures
the mirrors remain mist free in damp and wet conditions, where there is an increased risk of misting.

Seat Heaters (Where Fitted)

There are four seat heater settings available; off, 1, 2 and 3, which can be selected on the home and climate control screens
of the TSD. The heat setting is relayed to the vehicle occupants through a graduated display on the TSD.

Operation of the heated seats is controlled by the ATC module. When the ATC module receives a heating request from the TSD, it broadcasts a message to the CJB over the medium speed CAN bus. The CJB then provides a hardwired 12 V supply to the three heater elements in the related front seat. The heater elements, two in the seat cushion and one in the seat squab,
are wired in series. The ATC module monitors seat temperature using a temperature sensor located in each seat cushion. The CJB provides the temperature sensors with a 5 V supply. The level of the returned voltage back to the CJB is proportional to the seat temperature. The value of the return signal is broadcast to the ATC module, over the medium speed CAN bus, which allows it to control the seat temperature to the required level. The ATC module will suspend or disable operation of the seat heaters if any of the following occur:

Battery voltage exceeds 16.5 ± 0.3 V for more than 5 seconds. Seat heating is re-enabled when battery voltage
decreases to 16.2 ± 0.3 V.
If a short or open circuit is detected.
If the seat heat temperature rises significantly above the target temperature setting.

The graduated display on the TSD remains illuminated until the seat heaters are turned off or the engine stops. If the engine
is restarted within 30 seconds the seat heater resumes the previous heating level.

bus. Temperature control for the heater element is provided by the steering wheel heater control module which receives a
temperature feedback signal from a NTC (negative temperature coefficient) thermistor located within the steering wheel.



ATC Module Component Description



The ATC module is mounted on the outboard end of the air inlet duct, behind the front passenger side of the instrument panel. The ATC module processes inputs from the TSD, the switches on the integrated control panel and the system sensors. In response to these inputs, the ATC module outputs control signals to the A/C system and the heating and ventilation system.
Two electrical connectors provide the interface between the ATC module and the vehicle wiring. The ATC module uses hardwired inputs from the system sensors, the LIN bus to communicate with the stepper motors and the medium speed CAN bus to communicate with other control modules on the vehicle.

A/C Compressor Solenoid Valve

The A/C compressor solenoid valve is integral with the A/C compressor. Operation of the solenoid valve is controlled by the ATC module using a hardwired drive current of differing values. By controlling the flow of refrigerant through the compressor, the
solenoid valve can control the A/C system pressure and the evaporator operating temperature.
Refrigerant Pressure Sensor



The refrigerant pressure sensor provides the ATC module with a pressure input from the high pressure side of the refrigerant system. The refrigerant pressure sensor is located in the refrigerant line between the condenser and the thermostatic
expansion valve.

The ATC module supplies a 5 V reference voltage to the refrigerant pressure sensor and receives a return signal voltage, between 0 V and 5 V, related to system pressure.

The ATC module uses the signal from the pressure sensor to protect the refrigerant system from extremes of pressure. The ATC module transmits the A/C pressure, along with the compressor drive current value, to the instrument cluster on the medium speed CAN bus. These signals are broadcast to the ECM on the high speed CAN bus to allow it to calculate the torque being applied to the engine by the compressor. www.JagDocs.com

7 ECT (engine coolant temperature) sensor 8 Ambient temperature sensor 9 Electric booster heater 10 Face/Feet distribution stepper motor 11 RH (right-hand) temperature blend stepper motor 12 LH (left-hand) temperature blend stepper motor 13 Windshield (defrost) distribution stepper motor 14 ATC (automatic temperature control) module 15 150 A megafuse

General System Operation

Operation of the electric booster heater is controlled by the ATC module, which communicates with the micro-controller in the booster heater using the LIN bus. The temperature requested by the ATC module is based on:
The ambient air temperature.
The engine coolant temperature.
The temperatures selected on the integrated control panel.

The blower must be running for the electric booster heater to operate.
If electrical load management is in force, electric booster heater performance is reduced. For additional information, refer to:
Electronic Engine Controls (303-14A, Description and Operation),
Electronic Engine Controls (303-14B Electronic Engine Controls - V6 3.0L Petrol, Description and Operation), Electronic Engine Controls (303-14C, Description and Operation).



Electric Booster Heater Component Description



The electric booster heater is installed in the heater assembly, on the downstream side of the heater core. It consists of
ceramic coated thermistor elements, rated at 1.25 kW, and a micro-controller. Electrical power for the booster heater is
supplied by the BJB via a 150 A megafuse installed under the RH front seat.

3.
lose.















4. NOTE: Clamp the coolant hose to minimize coolant














5. Lower the vehicle.

6. Remove the coolant expansion tank pressure cap.

7. Fill the cooling system up to the MAX mark on the coolant expansion
tank using a fifty percent mixture of Jaguar Premium Cooling System
Fluid or equivalent, meeting Jaguar specification WSS M97B44-D and
fifty percent water.

8. Install the coolant expansion tank pressure cap.

9. Start and run the engine.

10. Set the heating system to MAX heat, the blower motor to MAX speed
and the air distribution to the instrument panel registers.


11. CAUTION: Observe the engine temperature gauge. If the engine
starts to over-heat switch off immediately and allow to cool. Failure to
follow this instruction may cause damage to the vehicle

Allow the engine to run until hot air is emitted from the instrument
panel registers, while observing the engine temperature gauge.

12. Switch the engine off.

13. Allow the engine to cool.

14. WARNINGS:


Never remove the coolant expansion tank cap under any
circumstances while the engine is operating. Failure to follow this
instruction may result in personal injury.


To avoid having scalding hot coolant or steam blowing out of the
cooling system, use extreme care when removing the coolant pressure
cap from a hot cooling system. Wait until the engine has cooled, then
wrap a thick cloth around the coolant pressure cap and turn it slowly
until the pressure begins to release. Step back while the pressure is
released from the system. When certain all the pressure has been
released (still with a cloth) turn and remove the coolant pressure cap
from the coolant expansion tank. Failure to follow these instructions may
result in personal injury.
Release the cooling system pressure.

15. Fill the cooling system up to the MAX mark on the coolant expansion
tank using a fifty percent mixture of Jaguar Premium Cooling System
Fluid or equivalent, meeting Jaguar specification WSS M97B44-D and
fifty percent water.

16. Install the coolant expansion tank pressure cap.

17. Raise the vehicle.

18. Check all coolant hoses for visible signs of coolant leaks.

19. Install the air deflector.

Refer to: Air Deflector (501-02, Removal and Installation).
www.JagDocs.com

A/C compressor retaining bolts 25 18 - A/C compressor manifold and tube retaining bolt 9 - 80 A/C condenser core retaining studs 5 - 48 A/C condenser core supply and return lines retaining nuts 8 - 71 Power steering oil cooler retaining nuts 7 - 62 A/C desiccant bag retaining screw (vehicles fitted with petrol engines) 22 16 - A/C desiccant bag retaining screw (vehicles fitted with diesel engines) 4 - 37 A/C pressure cutoff switch 8 - 71

Acts as an interface for the passive anti-theft system.
Refer to: Anti-Theft - Active (419-01A Anti-Theft - Active, Description and Operation).
Two analogue gauges are located in the instrument cluster; the speedometer and the tachometer. The speedometer is located
on the LH (left-hand) side of the instrument cluster. The tachometer is located on the RH (right-hand) side of the instrument
cluster

and displays engine speeds up to 7000 Revolutions Per Minute (RPM) for the supercharged engine, 8000 RPM for the naturally
aspirated engines and 6000 RPM for diesel variants.

The message center is a LCD located in a central position in the cluster. The message center displays system status information including fuel quantity remaining. www.JagDocs.com

Published: 11-May-2011
Instrument Cluster - Instrument Cluster - System Operation and Component Description
Description and Operation

Control Diagram

NOTE: A = Hardwired; D = High speed CAN (controller area network) bus; N = Medium speed CAN bus; O = LIN (local interconnect network) bus



Item Description 1 Battery 2 BJB (battery junction box) 3 EJB (engine junction box) 4 CJB (central junction box) 5 Sun load sensor (alarm LED (light emitting diode))