Jaguar XJ (2008 year). Manual - part 61

245

Battery

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!

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

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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

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• 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

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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.