2010 JAGUAR XFR temperature

Wheels and Tires - Wheels and Tires - Overview
Description and Operation

OVERVIEW Published: 25-May-2012

A number of alloy wheel designs are available ranging from 17 to 20 inch in diameter. A Tire Pressure Monitoring System
(TPMS) is used to monitor the air pressure in each tire and inform the driver if the pressure falls below predetermined
thresholds.

All wheels are of cast construction in aluminum alloy with the choice of wheel design dependant on the vehicle trim level and
engine derivative.

On normally aspirated petrol models and all diesel models a 4J X 18 inch temporary spare wheel is supplied as standard,
supercharged petrol models are supplied with a 4Jx19 inch temporary spare wheel. In some major European markets an Instant
Mobility System is offered as an alternative to the spare wheel. The Instant Mobility System is capable of providing a
temporary repair and tire inflation to a puncture of up to 6mm in diameter in the tread area of the tire. A puncture in the tire
wall cannot be repaired using the system.
The vehicle jack and accessories are stored in the spare wheel-well in the luggage compartment.

Tire Changing

WARNINGS:


Tires must be inflated to the recommended pressures when the tires are cold (ambient temperature) only. Refer to label
on the 'B' pillar for recommended tire pressures. If the tires have been subjected to use or exposed to direct sunlight, move
the vehicle into a shaded position and allow the tires to cool before checking or adjusting the pressures.


Valve stem seal, washer nut, valve core and cap should be replaced at every tire change. Valve stem seal, washer and
nut must be replaced if the valve retention nut is loosened. Sensor units and nuts must be fitted using correct torque figures
and associated profile. Damage to the vehicle and consequently injury to the vehicle's occupants may result if these
instructions are not adhered to.


NOTE: The TPMS valve should be serviced using the suitable service kit, each time the tyre is dismounted, to ensure an
air tight seal. Attention should be made to the detail of fitting this kit.

Vehicles fitted with TPMS can be visually identified by an external metal locknut and valve of the tire pressure sensor on the
road wheels. Vehicles without TPMS will have rubber tire valve.
www.JagDocs.com

7 Initiators 8 TPMS module 9 Instrument cluster


Tire Pressure Monitoring System (TPMS) System Operation

The controlling software for the Tire Pressure Monitoring System (TPMS) is located within a Tire Pressure Monitoring System
Module. The software detects the following:

When the tire pressure is below the recommended low pressure value - under inflated tire.
The location of the tire on the vehicle that is below the recommended pressure.
Malfunction warning.

The TPMS system comprises:

Tire pressure monitoring system module located below the right-hand front seat.
Tire pressure receiver located near the gear shifter within the floor console.
Two front initiators positioned forward of the wheels and behind the fender splash shields.
Two rear initiators positioned rearward of the wheels and assembled on dedicated brackets located behind the fender
splash shields.
Four sensors, each sensor is integral with a tire valve and located within the tire; the space saver spare wheel is not
fitted with a sensor.

The four initiators are hard wired to the TPMS module. The initiators transmit 125 KHz Low Frequency (LF) signals to the tire
pressure sensors which respond by modifying the mode status within the Radio Frequency (RF) transmission. The 315 or 433
MHz RF signals are detected by the tire pressure receiver which is connected directly to the TPMS module. The received RF
signals from the tire pressure sensors are passed to the TPMS module and contain identification, pressure, temperature and
acceleration information for each wheel and tire.

The TPMS module communicates with the instrument cluster via the medium speed CAN bus to provide the driver with
appropriate warnings. The TPMS module also indicates status or failure of the TPMS or components.

Tire Location and Identification

The TPMS can identify the position of the wheels on the vehicle and assign a received tire pressure sensor identification to a
specific position on the vehicle, for example front left, front right, rear left and rear right. This feature is required because of
the different pressure targets and threshold that could exist between the front and rear tires.

The wheel location is performed automatically by the TPMS module using an 'auto-location' function. This function is fully
automatic and requires no input from the driver. The TPMS module automatically re-learns the position of the wheels on the
vehicle if the tire pressure sensors are replaced or the wheel positions on the vehicle are changed.
The TPMS software can automatically detect, under all operating conditions, the following:
one or more new tire pressure sensors have been fitted
one or more tire pressure sensors have stopped transmitting
TPMS module can reject identifications from tire pressure sensors which do not belong to the vehicle
two 'running' wheels on the vehicle have changed positions.

If a new tire pressure sensor is fitted on any 'running' wheel, the module can learn the new sensor identification automatically
through the tire learn and location process.

The tire-learn and location process is ready to commence when the vehicle has been stationary or traveling at less than 12
mph (20 km/h) for 15 minutes. This is known as 'parking mode'. The learn/locate process requires the vehicle to be driven at
speeds of more than 12 mph (20 km/h) for 15 minutes. If the vehicle speed reduces to below 12 mph (20 km/h), the learn
process timer is suspended until the vehicle speed increases to more than 12 mph (20 km/h), after which time the timer is
resumed. If the vehicle speed remains below 12 mph (20 km/h) for more than 15 minutes, the timer is set to zero and process
starts again.

Low Pressure Monitoring

The tire low pressure sensor transmits by RF (315 MHz or 433 MHz depending on market) signal. These signals contain data
which corresponds to tire low pressure sensor identification, tire pressure, tire temperature, acceleration and tire low pressure
sensor mode.

Each time the vehicle is driven, the tire pressure monitoring system module activates each LF antenna in turn. The
corresponding tire low pressure sensor detects the LF signal and responds by modifying the mode status within the RF
transmission.

The system enters 'parking mode' after the vehicle speed has been less than 20 km/h (12.5 miles/h) for 12 minutes. In parking
mode the tire low pressure sensors transmit a coded signal to the tire pressure monitoring system module once every 13
hours. If the tire pressure decreases by more than 0.06 bar (1 lbf/in²) the tire low pressure sensor will transmit more often as
pressure is lost.

As each wheel responds to the LF signal from the tire pressure monitoring system module, it is assigned a position on the
vehicle and is monitored for the remainder of that drive cycle in that position.

The TPMS uses active tire pressure sensors which are located on each wheel, inside the tire cavity. The sensor incorporates the
tire valve and is secured in the wheel by a nut on the outside of the wheel. The sensor contains a Printed Circuit Board which
houses a PTC (positive temperature coefficient)sensor, a Piezo pressure sensor, a radio receiver and transmitter and a lithium
battery.

The tire pressure sensors use the PTC sensor and the Piezo sensor to periodically measure the pressure and temperature of
the air inside the tire. The data is transmitted by RF data signals at either 315 MHz or 433 MHz dependant on market
requirements.

The RF transmission from the sensor contains a unique identification code in its transmission data. This allows the TPMS to
identify the wheel on the vehicle. If the sensor is replaced on a wheel, the new sensor identification will be learnt through the
learn and location process.

The tire pressure sensor can also detect when the wheel is rotating. In order to preserve battery power, the sensor uses
different transmission rates when the wheel is stationary or moving.


NOTE: For important information regarding the removal and fitting of tire pressure sensors and associated valves, see the
Tire Changing section.

Instrument Cluster Indications



Item Description 1 Low tire pressure warning indicator 2 Message center Tire Pressure Sensor

Wheels and Tires - Wheels and Tires
Diagnosis and Testing

Principle of Operation Published: 11-May-2011

For a detailed description of the wheels and tires, refer to the relevant Description and Operation section in the workshop
manual. REFER to: (204-04 Wheels and Tires)

Wheels and Tires (Description and Operation), Wheels and Tires (Description and Operation), Wheels and Tires (Description and Operation).
Inspection and Verification


CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not
guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.

1. Verify the customer complaint. As much information as possible should be gathered from the driver to assist in
diagnosing the cause(s). Confirm which of the following two warning types (A or B) exist for the Tire Pressure
Monitoring System when the ignition status is switched from 'OFF' to 'ON'
(A) Check Tire Pressure Warnings. A low tire pressure warning will continuously illuminate the low tire
pressure warning lamp. This warning may be accompanied by a text message such as CHECK TIRE PRESSURE
(refer to owner literature). The manufacturer approved diagnostic system does NOT need to be used. Diagnostic
Trouble Codes (DTCs) are not generated with this type of warning. To extinguish this warning it is essential that,
with the ignition 'ON', all vehicle tires (including the spare) are to be set to the correct pressure as stated in the
vehicle handbook or as indicated on the placard label in the passenger/driver door aperture. It is not necessary
to drive the vehicle to clear 'check tire pressure' warnings - just changing the tire pressure causes the tire
low pressure sensor to transmit new data.
NOTES:

The tire pressures should be set by:
Using a calibrated tire pressure gauge
With 'cold' tires (vehicle parked in the ambient temperature for at least one hour, not in a garage with an
artificial ambient temperature)

If the tire pressure warning does not clear within two minutes, it is likely that the gauge is not correctly
calibrated or the tires are 'warm'. Carry out the following steps until the warning has cleared:

Increase the tire pressures by 3psi
Wait a further two minutes
When the tires are at ambient temperature and a calibrated gauge is available, reset the tire pressures
to the correct pressure.

Tire pressure adjustments are part of routine owner maintenance. Tire pressure adjustments that are
required due to a lack of owner maintenance are not to be claimed under vehicle warranty.

(B) System Fault Warnings. When a system fault is detected, the low tire pressure warning lamp will flash for
approximately 75 seconds prior to being continuously illuminated. Visually inspect for obvious signs of damage
and system integrity. Check for the presence of tire low pressure sensors on all four wheels (note: a tire low
pressure sensor has a metal valve stem rather than a rubber one).
2. Check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.

NOTE: If the tester fails to communicate with the Tire Pressure Monitoring System module, the following actions are
recommended:

Remove the Tire Pressure Monitoring System power supply fuse, inspect and re-install (if intact). Test to see if
communications have been re-established.

Remove the Tire Pressure Monitoring System ignition fuse (if applicable), inspect and re-install (if intact). Test to see if
communications have been re-established.
With ignition status set to 'ON', refer to the electrical circuit diagrams and check Tire Pressure Monitoring System
module for power, ignition and ground supplies .
Carry out CAN network integrity test using the manufacturer approved diagnostic system.

DTC Index


CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part
number 3548-1358-00

NOTES:


If the control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the
Warranty Policy and Procedures manual (section B1.2), or determine if any prior approval programme is in operation, prior to
the installation of a new module/component.


Generic scan tools may not read the codes listed, or may read only five digit codes. If this is the case, match the five
digits from the scan tool to the first five digits of the seven digit code listed to identify the fault (the last two digits give extra
information read by the manufacturer-approved diagnostic system).


When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal places,
and with an up-to-date calibration certificate. When testing resistance, always take the resistance of the DMM leads into
account.


Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.


If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may be the
cause. Always check for loose connections and corroded terminals.

DTC Description Possible Cause Action C1A56-31
Left Front Tire Pressure
Sensor and Transmitter
Assembly-no signal
Missing, incompatible or
defective tire low pressure
sensor or radio frequency
receiver GO to Pinpoint Test F. C1A56-68
Left Front Tire Pressure
Sensor and Transmitter
Assembly-event information
Information only - vehicle
exposed to extreme
temperature environment
and/or tire low pressure
sensor low battery voltage
event No action required. C1A56-91
Left Front Tire Pressure
Sensor and Transmitter
Assembly-parametric
Tire low pressure sensor
has reported out of range
information for pressure,
temperature or acceleration Replace defective tire low pressure sensor. Refer to
the relevant section of the workshop manual. C1A56-93
Left Front Tire Pressure
Sensor and Transmitter
Assembly-no operation
No tire low pressure sensor
can be localized at this
position due to an initiator
or tire low pressure sensor
malfunction GO to Pinpoint Test G. C1A57-11
Left Front Initiator-circuit
short to ground
Left front initiator circuit is
short to ground GO to Pinpoint Test B. Refer to Pinpoint test B1 C1A57-12
Left Front Initiator-circuit
short to battery
Left front initiator circuit is
short to power GO to Pinpoint Test B. Go to Pinpoint test B2 C1A57-13
Left Front Initiator-circuit
open
Left front initiator circuit
open GO to Pinpoint Test B. Go to Pinpoint test B9 C1A58-31
Right Front Tire Pressure
Sensor and Transmitter
Assembly-no signal
Missing, incompatible or
defective tire low pressure
sensor or radio frequency
receiver GO to Pinpoint Test F. C1A58-68
Right Front Tire Pressure
Sensor and Transmitter
Assembly-event information
Information only - vehicle
exposed to extreme
temperature environment
and/or tire low pressure
sensor low battery voltage
event No action required.

DTC Description Possible Cause Action C1A58-91
Right Front Tire Pressure
Sensor and Transmitter
Assembly-parametric
Tire low pressure sensor
has reported out of range
information for pressure,
temperature or acceleration Replace defective tire low pressure sensor. refer to
the relevant section of the workshop manual. C1A58-93
Right Front Tire Pressure
Sensor and Transmitter
Assembly-no operation
No tire low pressure sensor
can be localized at this
position due to an initiator
or tire low pressure sensor
malfunction GO to Pinpoint Test G. C1A59-11
Right Front Initiator-circuit
short to ground
Right front initiator circuit
is short to ground GO to Pinpoint Test C. Go to Pinpoint test C1 C1A59-12
Right Front Initiator-circuit
short to battery
Right front initiator circuit
is short to power GO to Pinpoint Test C. Go to Pinpoint test C2 C1A59-13
Right Front Initiator-circuit
open
Right front initiator circuit
open GO to Pinpoint Test C. Go to Pinpoint test C9 C1A60-31
Left Rear Tire Pressure
Sensor and Transmitter
Assembly-no signal
Missing, incompatible or
defective tire low pressure
sensor or radio frequency
receiver GO to Pinpoint Test F. C1A60-68
Left Rear Tire Pressure
Sensor and Transmitter
Assembly-event information
Information only - vehicle
exposed to extreme
temperature environment
and/or tire low pressure
sensor low battery voltage
event No action required. C1A60-91
Left Rear Tire Pressure
Sensor and Transmitter
Assembly-parametric
Tire low pressure sensor
has reported out of range
information for pressure,
temperature or acceleration Replace defective tire low pressure sensor, refer to
the relevant section of the workshop manual. C1A60-93
Left Rear Tire Pressure
Sensor and Transmitter
Assembly-no operation
No tire low pressure sensor
can be localized at this
position due to an initiator
or tire low pressure sensor
malfunction GO to Pinpoint Test G. C1A61-11
Left Rear Initiator-circuit
short to ground
Left rear initiator circuit
short to ground GO to Pinpoint Test D. Go to Pinpoint test D1 C1A61-12
Left Rear Initiator-circuit
short to battery
Left rear initiator circuit
short to power GO to Pinpoint Test D. Go to Pinpoint test D2 C1A61-13
Left Rear Initiator-circuit
open
Left rear initiator circuit
open GO to Pinpoint Test D. Go to Pinpoint test D9 C1A62-31
Right Rear Tire Pressure
Sensor and Transmitter
Assembly-no signal
Missing, incompatible or
defective tire low pressure
sensor or radio frequency
receiver GO to Pinpoint Test F. C1A62-68
Right Rear Tire Pressure
Sensor and Transmitter
Assembly-event information
Information only - vehicle
exposed to extreme
temperature environment
and/or tire low pressure
sensor low battery voltage
event No action required. www.JagDocs.com

DTC Description Possible Cause Action C1A62-91
Right Rear Tire Pressure
Sensor and Transmitter
Assembly-parametric
Tire low pressure sensor
has reported out of range
information for pressure,
temperature or acceleration Replace defective tire low pressure sensor, refer to
the relevant section of the workshop manual. C1A62-93
Right Rear Tire Pressure
Sensor and Transmitter
Assembly-no operation
No tire low pressure sensor
can be localized at this
position due to an initiator
or tire low pressure sensor
malfunction GO to Pinpoint Test G. C1A63-11
Right Rear Initiator-circuit
short to ground
Right rear initiator circuit
short to ground GO to Pinpoint Test E. Go to Pinpoint test E1 C1A63-12
Right Rear Initiator-circuit
short to battery
Right rear initiator circuit
short to power GO to Pinpoint Test E. Go to Pinpoint test E2 C1A63-13
Right Rear Initiator-circuit
open
Right rear initiator circuit
open GO to Pinpoint Test E. Go to Pinpoint test E9 C1A64-68
Spare Wheel Tire Pressure
Sensor and Transmitter
Assembly-event information
Information only - vehicle
exposed to extreme
temperature environment
and/or tire low pressure
sensor low battery voltage
event No action required. C1A64-91
Spare Wheel Tire Pressure
Sensor and Transmitter
Assembly-parametric
Tire low pressure sensor
has reported out of range
information for pressure,
temperature or acceleration Replace defective tire low pressure sensor, refer to
the relevant section of the workshop manual. C1A64-93
Spare Wheel Tire Pressure
Sensor and Transmitter
Assembly-no operation
Missing, incompatible or
defective tire low pressure
sensor or radio frequency
receiver GO to Pinpoint Test H. C1D19-11
External Receiver Data
Line-circuit short to ground
Tire pressure monitoring
system radio frequency
receiver or data line circuit
is short to ground GO to Pinpoint Test A. C1D19-12
External Receiver Data
Line-circuit short to battery
Tire pressure monitoring
system radio frequency
receiver or data line circuit
is short to power GO to Pinpoint Test I. C1D19-87
External Receiver Data
Line-missing message
Radio Frequency reception
blocked
Tire pressure monitoring
system radio frequency
receiver faulty
Tire pressure monitoring
system radio frequency
receiver or data line
circuits open circuit
Missing, incompatible or
defective tire low pressure
sensors GO to Pinpoint Test J. U0010-88
Medium Speed CAN
Communication Bus-bus off
CAN bus fault Carry out CAN network integrity tests. Refer to the
electrical wiring diagrams and check CAN network for
short, open circuit. U0140-00
Lost communication with
body control module-no sub
type information
CAN bus fault
Central Junction Box fault Refer to the electrical wiring diagrams and check
Central Junction Box power and ground supplies for
short, open circuit. Carry out CAN network integrity
tests.

Published: 11-May-2011
Vehicle Dynamic Suspension - Vehicle Dynamic Suspension V8 5.0L Petrol/V8 S/C 5.0L Petrol - System Operation and Component Description
Description and Operation

Control Diagram

NOTE: A = Hardwired; D = High speed CAN (controller area network) bus



Item Description 1 Battery 2 BJB (battery junction box) (Megafuse (250 A) 3 AJB (auxiliary junction box) 4 CJB (central junction box) 5 ATC (automatic temperature control) module 6 Fuse 36 (10 A) - from delayed power-off relay