Jaguar XJ (X350). Manual — part 1280

Battery Disconnect and Connect

WARNING: Batteries produce explosive gases which may cause personal injury.

Do not expose the battery to a naked flame. When charging or working near a battery
wear protective clothing and eye protectors. Always provide adequate ventilation.
Failure to follow these instructions may result in personal injury.

WARNING: Batteries contain sulphuric acid, avoid contact with skin, eyes and

clothing. Shield your eyes when working near the battery to protect against possible
contact of the acid solution. In case of contact with the skin or eyes, flush immediately
for a minimum of fifteen minutes and seek prompt medical attention. if swallowed call a
physician immediately. Failure to follow these instructions may result in personal
injury.

WARNING: Audio unit key code saving devices must not be used when working

on supplementary restraint systems or fuel systems. When using these devices the
vehicle electrical system is still live but with a reduced current flow. Failure to follow
this instruction may result in personal injury.

WARNING: The backup power supply energy must be depleted before any

supplementary restraint system repairs are carried out. To deplete the backup supply
energy, first disconnect the battery negative cable, then disconnect the battery positive
cable and wait one minute to avoid accidental deployment and personal injury. Failure
to follow this instruction may result in personal injury.

CAUTION: Make sure the engine is not running before disconnecting the battery

negative cable to avoid damage to the electrical system.

NOTE:

Before disconnecting the battery make sure that no data is required from the engine
control module (ECM), as battery cable disconnection will erase any fault codes and
idle/drive values held in the keep alive memory (KAM). It is not necessary to disconnect
or remove electronic control modules.

NOTE:

When the battery is disconnected all previous climate control assembly settings and fault
codes will be lost. It is necessary to record any settings or fault codes before battery
disconnection to prevent customer complaint.

NOTE:

This procedure should be used to disconnect the battery while carrying out repairs that

refer to the battery being disconnected.

1. Obtain and record the audio unit keycode and preset radio frequencies.


2. Remove the fire extinguisher.

3. Remove the luggage compartment floor covering.

4. Remove the spare wheel cover.

•

Remove the spare wheel cover retaining clamp.

5. Disconnect the battery ground cable.

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Description and installation

Battery and Cables

Item Part Number

Description

1

—

Battery positive cable

2

—

Battery negative cable

3

—

Battery tray

4

—

Battery

The batteries fitted are 12 volts (DC) 90Ah 680CCA on the petrol variants and 12 volts (DC)
95Ah 800CCA on the diesel variant.

The battery cables consist of heavy duty negative and positive cables with crimped eyelets.
They are bolted to the battery clamp distributor poles which are of dissimilar size to avoid
reverse connection.

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