Jaguar XJ (2008 year). Manual - part 63

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Wheels and Tires

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Tire pressures during long term vehicle 
storage

To minimise the possibility and effects of 
flat spots during storage, the tires may be 
inflated to the maximum pressure 
indicated on the tire wall.

Note:  Before using the stored vehicle on 
the road again, ensure that correct tire 
pressures are restored.

TIRE PRESSURE MONITORING 
SYSTEM (TPMS)

!

WARNING:

The Tire Pressure Monitoring System 
(TPMS) is NOT a substitute for 
manually checking tire pressures. Tire 
pressures, including the spare wheel, 
should be checked regularly, when 
cold, using an accurate pressure 
gauge and inflated to the correct 
pressure. Failure to properly maintain 
your pressures could increase the risk 
of tire failure, with consequential loss 
of vehicle control and personal injury.

!

WARNING:

The TPMS cannot register damage to a 
tire. Regularly check the condition of 
your tires.

Note: 

1.  Non-approved accessories may 

interfere with the system. If this 
occurs, TIRE PRESSURE SYSTEM 
FAULT is displayed in the message 
centre.

2. Certain tires may affect the 

performance of the TPMS. Always 
replace tires in accordance with 
recommendations, see page 249.

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Wheels fitted with TPMS can be easily 
visually identified by the external metal 
lock nut and valve (1). All Jaguar 
non-TPMS wheels have a rubber valve 
fitted (2).

The TPMS monitors pressure in each tire 
including the full size spare tire 
(temporary-use spare wheels are not 
fitted with sensors and are consequently 
not monitored).

TPMS operation

The TPMS monitors pressure of the tires 
via sensors located in each wheel and a 
receiver located within the vehicle. 
Communication between sensor and 
receiver is via Radio Frequency (RF) 
signals. The tire pressure warning 
comprises a yellow telltale indicator within 
the instrument pack and an associated 
message within the message centre.

Each tire, including the spare (if provided), 
should be checked monthly when cold 
and inflated to the inflation pressure 
recommended by the vehicle 
manufacturer on the vehicle placard or 
tire inflation pressure label. (If your vehicle 
has tires of a different size than the size 
indicated on the vehicle placard or tire 
inflation pressure label, you should 
determine the proper tire inflation 
pressure for those tires.)

As an added safety feature, your vehicle 
has been equipped with a tire pressure 
monitoring system (TPMS) that 
illuminates a low tire pressure telltale 
when one or more of your tires is 
significantly under-inflated. 

Accordingly, when the low tire pressure 
telltale illuminates, you should stop and 
check your tires as soon as possible, and 
inflate them to the proper pressure. 
Driving on a significantly under-inflated 
tire causes the tire to overheat and can 
lead to tire failure. Under-inflation also 
reduces fuel efficiency and tire tread life, 
and may affect the vehicle’s handling and 
stopping ability.

1

2

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Note: Please note that the TPMS is not a 
substitute for proper tire maintenance, 
and it is the driver’s responsibility to 
maintain correct tire pressure, even if 
under-inflation has not reached the level 
to trigger illumination of the TPMS low tire 
pressure telltale.

The warning comprises the 
TPMS telltale and the amber 
priority warning indicator within 

the instrument pack and an associated 
message within the message centre, see 
page 123.

Caution: When inflating tires, care 
should be taken to avoid bending or 
damaging the TPMS valves. Always 
ensure correct alignment of the 
inflation head to the valve stem.

Your vehicle has also been equipped with 
a TPMS malfunction indicator to indicate 
when the system is not operating 
properly. 

The TPMS malfunction indicator is 
combined with the low tire pressure 
telltale. When the system detects a 
malfunction, the telltale will flash for 
approximately one minute and then 
remain continuously illuminated. This 
sequence will continue upon subsequent 
vehicle start-ups as long as the 
malfunction exists. When the malfunction 
indicator is illuminated, the system may 
not be able to detect or signal low tire 
pressure as intended. 

TPMS malfunctions may occur for a 
variety of reasons, including the 
installation of replacement or alternate 
tires or wheels on the vehicle that prevent 
the TPMS from functioning properly. 
Always check the TPMS malfunction 
telltale after replacing one or more tires or 
wheels on your vehicle to ensure that the 
replacement or alternate tires and wheels 
allow the TPMS to continue to function 
properly. 

A text message will accompany the 
system malfunction and will display TIRE 
PRESSURE SYSTEM FAULT.

Tire pressures

To correctly set the tire pressures, see 
page 249.

Spare tire pressure: The full size spare 
tire should be inflated to the highest 
pressure for the specified tire size.

Full size spare wheel and tire change

Should it be necessary to change a wheel 
and tire with the spare then the system 
will automatically recognise the change in 
wheel positions. The vehicle needs to be 
stationary for 15 minutes during the wheel 
and tire change before the system is 
ready to detect the change in positions. 
The vehicle must be driven for a minimum 
of fifteen minutes after a tire change, and 
then remain stationary for fifteen minutes 
to activate full TPMS operation. After 
driving above 25kph (18mph) any 
deflation warning will clear typically within 
5 minutes.

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If a wheel and tire needs changing

If the temporary-use spare wheel is fitted 
the system will automatically recognise 
the change in wheel positions. Then after 
approximately ten minutes of driving 
above 25 km/h (18 mph), a message TIRE 
PRESSURE SENSOR FAULT will be 
displayed accompanied by illumination of 
the warning tell-tale and the amber 
priority warning indicator.

The warning telltale will initially flash and 
will subsequently revert to continuous 
illumination. Extended use of the 
temporary-use spare wheel will produce 
an additional text message TIRE 
PRESSURE SYSTEM FAULT. 

This TPMS display sequence will be 
activated at every ignition cycle until the 
temporary-use spare wheel is replaced by 
a fully operational full size wheel and tire 
assembly.

Always replace the temporary-use wheel 
before having TPMS faults investigated. 
The fault may well be rectified with the 
fitment of a fully operational full size 
running tire in lieu of the temporary-use 
spare wheel assembly.

Tire changing

Always have your tires serviced or 
changed by a qualified engineer.

Care must be taken to avoid contact 
between the bead of the tire and the 
sensor during removal and refitting of the 
tire, otherwise the sensor may become 
damaged and or inoperable.

Caution: 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 
valve retention nut is loosened. Sensor 
units and nuts must be refitted using 
correct torque figures and associated 
profile. Damage to the vehicle may 
result if these precautions are not 
taken.

Sensors can be removed from the wheel 
by the unscrewing of the valve retention 
nut.

Replacement sensor

Should the sensor require replacing, it 
should be carried out by a Jaguar Dealer.

A replacement sensor must be fitted to a 
running wheel in order to be recognised 
by the TPMS. The vehicle needs to be 
stationary for 15 minutes during the 
sensor fitment before the system is ready 
to detect the new sensor. The vehicle 
must be driven for a minimum of fifteen 
minutes after the sensor change, and then 
remain stationary for fifteen minutes to 
activate full TPMS operation. 

If the TPMS warning for any wheel does 
not clear, even after ensuring correct 
inflation and driving for more than ten 
minutes above 25 km/h (18 mph), you 
should seek qualified assistance as soon 
as possible.