2004 JAGUAR XJ ECU

Roadside Emergency 6 - 17
Side repeater indicator – bulb renewal
To remove the light unit from the front wing, push the lens
towards the front of the vehicle to compress the spring clip and
then pull the rear outwards to remove the complete unit.
Twist the bulb holder anti-clockwise and pull it from the lens.
Pull the capless bulb from the holder and fit a new one of the
correct type, W5W. Fit the bulb holder to the lens and twist
clockwise to secure.
Place the inner rear of the lens unit into the recess and then
push the front of the lens inwards until it clicks into place. Number plate light – bulb renewal
Press the two lens clips inwards and remove the lens from the
vehicle.
Remove the bulb and fit a new
one of the correct type, W5W.
Refit the lens by pressing it firmly into the recess until it clicks
into place.
Front fog light – bulb renewal
It is recommended that the front fog light bulb, type H3,
is renewed by a Jaguar Retailer.

Roadside Emergency 6 - 19
Rear light assembly – bulb renewal
On the rear light assemblies, only the direction indicator,
reverse and fog bulbs are replaceable. The stop/tail lamps
consist of arrays of LED lights which can only be renewed by a
Jaguar Retailer if they fail to operate.
Ensure that the lights and ig nition switch are OFF before
removing any bulbs.
Open the trunk and secure the floor panel in the open position.
See page 6 - 4.
Rotate fastener ( A) a quarter turn and remove. Pull back the
side carpet trim to access the rear of the light assembly.
The bulb positions are:
1. Reverse light, type P21W.
2. Direction indicator, type PY21W.
3. Fog light, type P21W.
Rotate the bulb/connector and wi thdraw it from the assembly.
Remove the faulty bulb and fit a new one of the correct type,
as illustrated on the bulb holder. It is essential to fit the correct
type.
Reposition the bulb/connector and turn it to secure.
Carefully refit the side carpet trim. Fit fastener ( A) and rotate a
quarter turn.
Close the trun k floor panel.

6 - 20 Roadside Emergency
Fire Extinguisher
Many countries make it compulsory to
carry a fire extinguisher. Your Jaguar
Retailer can supply and fit one.
Mexican vehicles have a factory fitted fire
extinguisher which contains 2.2 lbs (1 kg)
of BC powder pressurised with nitrogen
to a working pressure of 180 psi (12 bar)
at 68°F (20°C).
This extinguisher can be used on liquid
fires, electrical equipment fires and, if no
explosion risk, gaseous fires.
!WARNING:
1. Do not test the fire extinguisher prior to use. Partial discharge will
render the extinguisher
inoperative.
2. Do not use the fire extinguisher closer than 8 feet (2.4 m) to the
base of a liquid fire as the force
may splatter the burning liquid to
the surrounding area. To operate the fire extinguisher:
1. Unclip and remove the extinguisher
from the bracket.
2. Put your finger through the yellow safety wedge ring ( A) and pull hard to
remove the wedge. The operating
lever will be exposed.
3. Hold the extinguisher upright and aim at the base of the fire.
4. Press the lever down firmly.
5. Release the lever to stop the flow of powder. Maintenance
Every six months:
• Remove the extinguisher from its
bracket and check that the nozzle is
clear.
• Check that the safety wedge strap ( B)
is secure.
• Check the pressure gauge on the base of the extinguisher. If the gauge is in
the red area report it to your Jaguar
Retailer immediately as the
extinguisher may not work in an
emergency.

6 - 28 Roadside Emergency
F35 ATO 10A Red Left-hand seat movement
F36 ATO 40A Orange Left-hand seat movement
F37 ATO 25A Natural Driver window
F38 ATO 15A Blue Radio head unit
F39 ATO 5A Tan Transit relay (removed before customer delivery)
F40 ATO 10A Red Security LED, yaw rate sensor
F41 ATO 20A Yellow Ignition switch
F42 ATO 10A Red FEM, REM, DDM, clock
F43 ATO 5A Tan Diagnostic connector
F44 ATO 5A Tan Brake switch
F45 ATO 10A Red Right-hand seat movement
F46 ATO 25A Natural Passenger window
F47 ATO 5A Tan Instrument pack
F48 ATO 20A Yellow Instrument pack (steering column tilt and reach)
F49 ATO 40A Orange Left-hand seat movement
Fuse No
Fuse
Type Rating
(amps) Colour
Circuit

7 - 6 Maintenance
Checking and Top Up
Check Engine Oil Level
Check the oil level regularly with the vehicle on flat, level
ground.
Refer to page 7 - 5 for dipstick and oil filler locations.
It is preferable to check the oil level after the vehicle has been
standing, that is, with th e engine completely cold.
If the engine has been started do not check the oil level until the
engine has reached normal operating temperature. Stop the
engine and wait for a minimum of 5 minutes to allow the oil to
drain back into the sump.
Remove the dipstick ( A) and wipe clean with a non-fluffy cloth.
Replace fully, then wi thdraw the dipstick. If the oil level is above
the lower of the two dots on the dipstick then no additional oil
is required.
If the oil level reaches the lower of the two dots, remove the oil
filler cap ( B) and add oil, to the quantity and specification
shown on the next page.
Refit the filler cap and hand tighten securely.
Caution: Do not use oil additives of any type. Use only
specified lubricants.

Maintenance 7 - 9
Check Brake Fluid Reservoir
Refer to page 7 - 5 for brake fluid reservoir
location. The brake fluid reservoir is
concealed by a lift-out cover.
To remove the lift-out cover, pull the two
clips on the rear edge of the cover
towards the front of the car, and lift the
cover out.
Caution:
1. While handling brake fluid, take extreme care; brake fluid must not
contact the vehicle paintwork.
2. Always use fresh, clean fluid from a new container. Never introduce
used brake fluid into the system. The fluid is visible through the
translucent casing of the reservoir and
must be maintained at the ‘MAX’ mark.
!WARNING:
The fluid level will drop as the brake
pads wear. If the le vel is very low
report the loss of fluid to the nearest
Jaguar Retailer. Do not drive the
vehicle until the cause is rectified.
If necessary, top up as follows:
Before removing the cap, clean the
reservoir and cap thoroughly with a non-
fluffy cloth to ensure that no foreign
matter enters the reservoir.
Unscrew the filler cap and top up to the
‘MAX’ level using brake fluid to
specification Jaguar Super DOT 4
(ESA-M6C25-A) .
Refit the filler cap securely.
To avoid contamination should any brake
fluid be spilt, replace the cap on the
reservoir before cleaning the spilt fluid
from the vehicle. Hydraulic fluid
The brake hydraulic fluid in the master
cylinder and brake operating system uses
non-mineral polyglycol based brake fluid
with a minimum standard of JAGUAR
SUPER DOT 4. ONLY FLUID OF THIS
TYPE AND STANDARD MAY BE USED.
!WARNING:
1. Contamination of the brake system fluid by as little as
1 per cent will cause rapid
deterioration of t he system seals.
Ensure that the brake fluid
reservoir cap is securely fitted.
2. Do not allow brake fluid to make contact with skin or eyes. If this
happens, rinse the affected area
immediately with plenty of water.
3. Brake fluid is toxic and flammable. Be sure to observe all warnings
indicated on the brake fluid
container.

Maintenance 7 - 11
Check Coolant Level
Refer to page 7 - 5 for coolant header tank
location.
The coolant level MAX and MIN
indicators are located inside the reservoir
and are only visible when looking into the
filler neck with the cap removed. Check
the level only when the engine is cold.
The coolant level shou ld be between the
MAX and MIN indicators. If persistent
coolant loss is noticed, have a Jaguar
Retailer investigate the cause
immediately.
!WARNING:
Do not remove the coolant header
tank filler/pressure cap while the
engine is hot. If the cap must be
removed, protect the hands against
escaping steam and slowly turn the
cap anti-clockwise until the steam
starts to escape. Leave the cap in this
position until the pressure is
released, and then remove the cap.
Topping up
!WARNING:
Do not allow anti-freeze to make
contact with skin or eyes. If this
happens, rinse the affected area
immediately with plenty of water.
Caution: Anti-freeze will damage
paintwork. Avoid spillage.
Top up with a mixture of 50% water and
50% anti-freeze until the coolant is
between the MAX and MIN indicators
inside the header tank. Use anti-freeze to
specification WSS M97B44, coloured
orange, Extended Life Coolant.
Refit the filler cap and hand-tighten
securely until the ratchet operates. Engine anti-freeze
When used at the correct concentration,
anti-freeze not only protects the engine
from frost damage in winter, it also
provides all year round protection against
internal corrosion.
The cooling system should always be
topped up or refilled with the specified
anti-freeze at the correct concentration.
This 50/50% mixture gives frost
protection for temperatures down to
–40°F (–40°C).
Do not mix any other anti-freeze with
that specified; inferior quality anti-freeze
may be ineffective in maintaining
adequate frost and corrosion protection
to the cooling system.
The coolant solution
may remain in the
cooling system for five years or
156,000 miles (250,000 km) after which
the system should be drained, flushed
and refilled.
Engine block heater
For further information consult your
Jaguar Retailer.
Caution: The fitting of an engine
block heater does not eliminate the
need for anti-freeze under freezing
conditions.

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.