Jaguar XJ (2008 year). Service manual — part 61

245

Battery

R

!

WARNING:

The cell plugs and vent pipe must be in
place at all times when the battery is
connected to the vehicle. Ensure that
the vent pipe is clear of obstructions
and not kinked. Failure to do so may
cause a pressure build up in the
battery, resulting in an explosion.

!

WARNING:

Do not expose the battery to a naked
flame or spark as the battery produces
explosive, flammable gas.

!

WARNING:

Never jump start (boost) or charge, a
frozen battery. Doing so can result in
an explosion.

!

WARNING:

Remove all metal jewellery before
working on, or near, the battery, and
never allow metal tools or vehicle
components to come into contact with
the battery terminals. Metal objects
can cause sparks, and/or short
circuits, resulting in an explosion.

!

WARNING:

Do not allow the battery posts or
terminals to come into contact with
your skin. They contain lead, and lead
compounds which are toxic. Always
wash your hands thoroughly after
handling the battery.

Caution: Do not allow battery
electrolyte to come into contact with
fabrics or painted surfaces. If battery
electrolyte comes into contact with any
surface, the surface should be washed
down immediately with copious
amounts of clean water. Battery
electrolyte is both corrosive and toxic,
and can damage a wide range of
materials if left.

The exterior of the battery should be
occasionally wiped clean to remove any
dirt or grease.

If a new battery is to be fitted, it must be
the same type as the original.

The use of unapproved batteries is not
recommended and could invalidate the
vehicle warranty.

Note:

The service life of the battery is dependent
on its condition of charge. It must always
be sufficiently charged for the battery to
last an optimum length of time.

GENERATOR

To prevent damage to the generator, do
not run the engine while the battery or any
of the charging circuit cables are
disconnected.

The generator has polarity-sensitive
components that will be irreparably
damaged if subjected to incorrect
polarity. Ensure that the battery earth lead
is always connected to the battery
negative terminal.

Battery

246

L

BATTERY LEAD
DISCONNECTION AND
RECONNECTION

Battery lead disconnection

Caution: Under no circumstances
should a battery be disconnected
whilst the ignition circuit is live, as
permanent damage to the instrument
panel may occur.

Caution: Disconnect the negative lead
(earth terminal) first.

Fold the luggage compartment floor panel
forwards.

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 over-tighten the pinch
bolts.

Clean the battery posts and coat the post
bases with petroleum jelly.

Ensure the vent tube is connected and
free from kink or damage.

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 has been reconnected
and the ignition switch is turned to
position II, the message centre display
will initially show an erroneous reading i.e.
- - - - - -. This will remain until after the
bulb check sequence, when the correct
recorded distance will be displayed. This
is a normal function of the instrument
panel.

After battery reconnection

After reconnecting the battery:
• Reset the Electric Parking Brake

(EPB); see page 148.

• Reset the electrically operated

windows anti-trap function; see page
102.

• 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.

• The radio will not operate until the

correct security code has been
re-entered. Refer to the audio
systems handbook or the
touch-screen display handbook.

• If the battery is disconnected for more

than 72 hours the radio preset
channels will need to be reset.

E86401

247

Battery

R

• Where fitted, the TV preset channels

may need to be reset. Refer to the
touch-screen display 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 16
kilometres (10 miles) or more while the
control system re-adapts.

BATTERY CHARGING

!

WARNING:

Ensure that the charger used is of the
correct type and rating for the battery.
Using an unsuitable charger may
damage the battery, and could cause
the battery to explode.

!

WARNING:

Batteries produce combustible gas
(hydrogen) when being charged. The
battery must be removed from the
vehicle before charging commences.

!

WARNING:

Never charge or boost a frozen battery.

!

WARNING:

Always charge the battery in a well
ventilated area away from any naked
flames, sparks or other ignition
sources. During charging the battery
can produce a highly explosive and
flammable gas.

Caution: The battery must be
disconnected and removed from the
vehicle before charging. Failure to do
so could result in damage to the
vehicle's electrical system.

Caution: Always follow the instructions
supplied with the battery charger.
Failure to do so may result in damage
to the battery.

To disconnect the battery, refer to Battery
lead disconnection on page 246.

When charging the battery ensure that the
charge voltage is the same as the nominal
voltage of the battery.

Switch off the charger 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 negative (–) terminal of
the battery.

Do not remove or loosen any of the cell
plugs when charging the battery.

Wiper Blades

248

L

Wiper Blades

WINDSHIELD WIPER BLADES

Inspect and clean

Lift the wiper blades clear of the
windshield and wipe the blades with a
clean, soft cloth moistened with water to
which a mild liquid detergent has been
added.

Use Jaguar Screen Clean Paste to
remove contamination from the
windshield 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 Dealer
for advice.

To ensure that the windshield remains
smear-free, the washer system should be
operated whenever the wipers are used,
even when it is raining.

BLADE REPLACEMENT

As the windshield washer jets are
mounted on the wiper arms, it is
recommended that the wiper blades are
changed by a Jaguar Dealer.

Caution: Only fit the correct length and
type of wiper blade. Failure to do so
may cause damage to the wiper
system, it may also affect the operation
of the rain sensor.

Note: The windshield washer jets and
headlamp washer jets are not adjustable.