2004 JAGUAR XJ maintenance

7-14 Maintenance
Battery Warning Signs
There are two labels on the battery
(see illustration above) depicting a
number of warning signs. The warning
signs are as follows:
Label A
No smoking, no naked
flames, no sparks (Red)
Keep away from children
(Red)
Shield eyes (Blue)
Note operating
instructions (Blue)
Battery acid (Yellow)
Explosive gas (Yellow)
Label B
DANGER/POISON
SHIELD EYES EXPLOSIVE
GASES can cause
blindness or injury
NO
•SPARKS
•FLAMES
•SMOKING

Maintenance 7 - 15
Check/Top Up Battery
Electrolyte
In normal climates this must be carried
out at least once a year. In hot weather/
climates the electrolyte level must be
checked at least every three months.
Fold the luggage compartment floor panel
forwards (see page 6 - 4).
Unscrew the six cell plugs. Check that the
electrolyte is level wi th the plastic level
indicator ( A). If necessary, top up with
distilled water but do not overfill.
If illumination is required, use a hand-
held flashlight to in spect the electrolyte
level.
Refit the six cell plugs and refit the
battery cover.
Battery Charging
!WARNING:
1. Batteries produce combustible gas (hydrogen) when being charged.
The battery must be removed
from the vehicle before charging
commences.
2. Never charge or boost a frozen battery.
To disconnect the battery, refer to
Battery lead disconnection on
page 7 - 16.
When charging the battery ensure that
the charge voltage is the same as the
nominal voltage of the battery.
Switch off the charge r before connecting
or disconnecting terminal connections to
avoid sparks and short circuits.
Ensure that the charger positive (+) lead
is connected to the positive (+) terminal
of the battery and the negative (–) lead is
connected to the nega tive (–) terminal of
the battery.
Do not remove or loosen any of the cell
plugs when charging the battery.
Check and, if necessary, top up the
electrolyte level when the battery is fully
charged.
SULFURIC ACID can
cause blindness or severe
burns
FLUSH EYES
IMMEDIATELY WITH
WATER
GET MEDICAL HELP FAST
General warning on the label:
KEEP OUT OF THE REACH OF
CHILDREN
DO NOT TIP
KEEP VENT CAPS TIGHT AND LEVEL

7-16 Maintenance
Battery lead disconnection
Caution:
1. Under no circumstances should a battery be discon nected whilst
the ignition circuit is live,
as permanent damage to the
instrument cluster may occur.
2. Disconnect the negative lead (earth terminal) first.
Fold the luggage compartment floor panel
forwards (see page 6 - 4).
Slacken the negative lead pinch bolt and
disconnect the negative (–) battery lead.
Slacken the positive lead pinch bolt and
disconnect the positive (+) battery lead. Battery lead connection
Note:
Upon battery reconnection the
security system will be armed. Opening
any protected entry will sound the alarm.
Make sure that a key or key transmitter is
available.
Caution: Do not overtighten the
pinch bolts.
Clean the battery posts and coat the post
bases with petroleum jelly.
Connect the positive (+) lead, tighten the
pinch bolt and clip the positive terminal
cover on the battery. Connect the
negative (–) lead and tighten the pinch
bolt.
After the battery ha s been reconnected
and the ignition swit ch is turned to
position ‘II’, the message centre display,
if fitted, will initially show an erroneous
reading i.e.––––––. Thiswill remain
until after the bulb check sequence, when
the correct recorded mileage will be
displayed. This is a normal function of the
instrument cluster.
After battery reconnection
After reconnecting the battery:
• Reset the electric parkbrake; refer to Parkbrake on page 4 - 34. • Reset the electrically operated
windows anti-trap function; refer to
Window Anti-trap Protection on
page 4 - 30.
• The trip computer will lose all recorded trip data and all trip
functions will be reset to zero.
The vehicle total odometer reading is
retained.
• If the battery is disconnected for more than 72 hours the radio preset
channels will need to be reset.
• Where fitted, the TV preset channels may need to be reset. Refer to the
Jaguar Touch-screen Handbook.
• Reset the clock to the correct time.
The engine electronic control system
adapts to certain characteristics of the
vehicle. These adaptations are lost if the
battery is disconnected.
On reconnection, therefore, some slightly
abnormal drive symptoms may occur and
the vehicle may need to be driven
10 miles (16 kilometres) or more while
the control system re-adapts.

Maintenance 7 - 17
Windscreen Wipers
Use Jaguar Screen Clean Paste to remove
contamination from the windscreen to
ensure effective wiping or if smearing or
juddering becomes evident. A more
aggressive cleaning agent may be
required to remove stubborn
contamination. Contact a Jaguar Retailer
for advice.
To ensure that the windscreen remains
smear-free, the washer system should be
operated whenever the wipers are used,
even when it is raining.
Windscreen Wiper Blades –
Inspect and Clean
Lift the wiper blades clear of the
windscreen and wipe the blades with a
clean, soft cloth moistened with water to
which a mild liquid detergent has been
added.
Windscreen Washers
The windscreen washer jets are mounted
on the wiper arms.
Note:The windscreen washer jets and
headlight washer jets are not adjustable.

7-18 Maintenance
Tyres
Tyres of the correct type, manufacturer
and dimensions, with correct cold
inflation pressures are an integral part of
every vehicle’s design. Regular
maintenance of tyres contributes not only
to safety, but to the de signed function of
the vehicle. Road-holding, steering and
braking are especially vulnerable to
incorrectly pressurised, badly fitted or
worn tyres.
Tyres of the correct size and type, but of
different make have widely varying
characteristics. It is therefore
recommended that Jaguar approved tyres
are fitted to all wheels.
A tyre recommendation placard is placed
on the inside of the fuel filler flap, giving
information specific to the vehicle’s
wheel and tyre equipment.
Always ensure that the wheel nuts are
fully seated before finally tightening the
nuts in alternate sequence.
W, Y and Z-rated performance tyres are
optimised for driving dynamics and have
limited winter traction ability. Compared
with H-rated all-season tyres, they may
incur increased tread wear, reduced ride
comfort, and increased road noise.
Tyre Renewal
When renewing tyres, it is preferable to
fit a complete vehicle set. If either front
or rear tyres only need to be renewed,
new tyres must be fitted, as axle sets,
to replace worn ones. After new tyres
have been fitted the wheels need to be
dynamically balanced. The radial ply
tyres specified are designed to meet the
high-speed performance capability of this
vehicle (see page 8 - 7) . Do not fit tyres
with a different tread pattern, size or
speed rating.
Tyre Pressures
The recommended tyre pressures are
written on a label, inside the fuel filler
flap. These tyre pressures provide
optimum ride and handling
characteristics for all normal operating
conditions. The pressures should be
checked, and correctly set each week
with the tyres cold. Tyre temperatures
and pressures increase when running.
Deflating a warm tyre to the
recommended pressure will result in
under inflation whic h may be dangerous.
A slight natural pressure loss occurs with
time. If this exceeds 2 lbf/in² (0.14 bar,
14 kPa, 0.14 kg/cm²) per week, the cause
should be investigated and rectified.
Note: It is an offence in certain countries
to drive a vehicle with tyres that are not
inflated in accordance with the vehicle’s
proper use.

Maintenance 7 - 19
Wear
All tyres fitted as original equipment
include tread wear indicators (TWI) in
their tread pattern. When the tread has
worn to a remaining depth of 1.6 mm the
indicators appear at the surface as bars
which connect the tread pattern across
the full width of the tyre.
It is illegal, in certain countries,
to continue to use tyres after the tread
has worn to less than 1.6 mm over three
quarters of the width and the entire
circumference of the tyre.It should be noted that the properties of
many tyres alter progressively with wear.
In particular the ‘wet grip’ and
aquaplaning resistance are gradually but
substantially reduce
d. Extra care and
speed restriction should therefore be
exercised on wet roads as the effective
tread depth diminishes.
Incorrect wheel alignm ent will accelerate
tyre wear. Fins on the inner or outer
edges of the tread pattern are caused by
excessive toe-in or toe-out respectively.
As fins may also be caused by high
cornering speeds or road camber, it is
advantageous to have the cause detected
by having the wheel alignment checked.
Tyre repair
It is recommended that damaged tyres
are discarded and new tyres fitted.
They must not be repaired in view of the
high performance capability of the
vehicle. Damage
Excessive local distortion can cause the
casing of a tyre to
fracture and may lead
to premature failure. Tyres should be
examined especially for cracked walls,
exposed cords, etc. Flints and other sharp
objects must be removed from the tyre
tread; if left in they may work through the
cover. Clean off any oil or grease
contamination by using a suitable
cleaner.
Caution: Do not use paraffin
(kerosene), because this has a
detrimental effect on rubber.
Tyre use after vehicle storage
After a long period of a vehicle standing,
tyres may become locally distorted with a
flat area. This will cause an uneven ride
for a few miles until the tyres have
warmed up and the ‘flat’ rounds off.
However, to reduce the effects of
flat-spots, the tyres of a stored vehicle
may be inflated to pressures not
exceeding 60 lbf/in² (4.2 bar, 420 kPa,
4.3 kg/cm²).

7-20 Maintenance
United States Department of
Transportation/Uniform Tyre Quality
Grades
The following information relates to the
tyre grading system developed by the
National Highway Traffic Safety
Administration which will grade tyres by
tread wear, traction and temperature
performance.
Tread wear
The tread wear grade is a comparative
rating based on the wear rate of the tyre
when tested under controlled conditions
on a specified government test course.
For example, a tyre graded 150 would
wear one and a half (1.5) times as well on
the government course as a tyre
graded 100.
The relative performance of tyres
depends upon the actual conditions of
their use, however, and may depart
significantly from the norm due to
variations in driving habits, service
practices and differences in road
characteristics and climate. Traction – A, B, C
The traction grades, from the highest to
the lowest are ‘
A’, ‘ B’ and ‘ C’, and they
represent the tyre’s ability to stop on wet
pavements as measured under controlled
conditions on specified government test
surfaces of asphalt and concrete. A tyre
marked ‘ C’ may have poor traction
performance.
!WARNING:
The traction grade assigned to this
tyre is based on braking (straight
ahead) traction tests and does not
include cornering (turning) traction. Temperature – A, B, C
The temperature grades ‘
A’ (the highest),
‘ B ’ and ‘C ’ representing the tyre’s
resistance to the generation of heat and
its ability to dissipate heat when tested
under controlled conditions on a
specified indoor laboratory test wheel.
Sustained high temperature can cause the
material of the tyre to degenerate and
reduce tyre life, and excessive
temperature can lead to sudden tyre
failure.
The grade ‘ C’ corresponds to a level of
performance which all passenger car
tyres must meet under the Federal Motor
Vehicle Safety Standard No. 109.
Grades ‘ B’ and ‘ A’ represent higher levels
of performance on the laboratory test
wheel than the minimum required by
law.
!WARNING:
The temperature grade for this tyre is
established for a tyre that is properly
inflated and not over loaded.
Excessive speed, under-inflation or
excessive loading, either separately
or in combination, can cause heat
build-up and possible tyre failure.

Maintenance 7 - 21
Winter (Snow) Tyres
The tyres fitted as original equipment are
designed with a rubber compound, tread
pattern and width specially suited for
high speeds in normal road conditions,
but they are less suitable during extremes
of low temperatures, snow and ice.
The use of winter tyres will considerably
improve the vehicle’s handling during
these conditions.
It is recommended that only Jaguar
approved winter tyres are used (refer to
Wheels and Tyres on page 8 - 7).
!WARNING:
Do not exceed the tyre speed rating
when using winter tyres.
Tyre directional indicators must be
rotating in a clockwise direction when
viewed from the right-hand side of the
vehicle, and anti-clockwise when viewed
from the left-hand side of the vehicle.
Winter tyres must be used in vehicle sets,
that is, fitted on all four wheels.
Snow Chains
Snow chains, of the recommended type,
may only be fitted to rear wheels.
Contact your Jaguar Retailer for details
and availability of approved snow chains.
The maximum speed when using snow
chains is 30 mph (48 km/h).
Remove the snow chains immediately the
roads are clear of snow.
Ensure the fitting instructions supplied
with the snow chains are kept in a safe
place, for example, wi th this literature
pack.
Note: Dynamic Stability Control MUST
be switched OFF when using snow chains.