1998 JAGUAR X308 fuse

irri
tation and dermatitis. In addition, used engine oil contains potentially harmful contaminants which may cause skin
cancer. Washing facilities and adequate means of skin protection should be provided.
Observe these recommendations:
Wear pro t
ective clothing and impe
rvious gloves when necessary.
Do not put oily
rags in pockets. Avoid contaminat
ing clothes, particularly underwear, with oil.
Overal
ls must be cleaned re
gularly; discard oil impregna ted clothing and footwear wh ich cannot be washed or
cleaned.
Fi rst
Aid treatment should be obtained
immediately for open cuts or wounds.
Use barrier
creams, applying before each work period, to en
able easier removal of dirty oil and grease from the skin.
Wa
sh with soap and water to ensure th
at all oil is removed (skin cleaner and a nail brush will help). The use of
preparations containing lanolin will help to replace the natural skin oils which have been removed.
Do
not use petrol, kerosene, gas oil, th
inners or solvents for washing skin.
If
skin disorders develop, obtain medical advice immediately.
Wh
ere prac
ticable, degrease components prior to handling.
W
h
ere there is a risk of fluids coming into contact with th
e eyes, suitable eye protection should be worn - goggles or
face shield. An eye wash facility should be provided.
Ensure that a
dequate ventilation is provided when volatile degreasing agents are being used.
E
n
vironmental Protection
In so
m
e countries it is illegal to pour used oil onto the ground
, down sewers or drains, or into water courses. The burning of
used engine oil in small space heaters or boilers is not reco mmended unless emission control equipment is fitted. Dispose of
used oil through authorized waste disposal contractors, to licensed waste disposal sites or to the waste oil reclamation
trade. If in doubt, contact the Local Authority for advice on disposal facilities.
On-Board Diagnostics (OBD)
Ve
hicles use programmed electronic control systems to prov
ide engine management and emission regulation, automatic
transmission operation and anti -lock braking control. These control systems ha ve an integral On-Board Diagnostics (OBD)
facility for use in conjunction with either Jaguar diagnostic equipment or a scan t ool which is capable of retrieving DTCs,
PIDs and performing active commands.
The OBD information in this manual provid es diagnostic and rectification procedures for emission related electrical and
mechanical systems. The informat ion is intended to facilitate fault diagnosis and the subsequent rectification of vehicles
without recourse to the portab le diagnostic unit (PDU).
OBD related information can be fo und in the following sections:
General Information

Engine M

anagement System
Auto

matic Transmission
Anti-lock Br

aking System
Where appropriate a section comprises the following sub-sections:
Description and Operation
A ge
neral illustration and parts list to help the identi
fication of the particular system or component.
A b
rief description of the system operating characteristics and monitoring procedure
accompanied by a component
illustration.
Addi ti
onal information, where appropriat
e, is provided in the form of component calibrations, characteristics and
cross sectional views.
A localized circui
t diagram is included to provide circuit iden
tification and details of connectors, splices, fuses, wire
gauge and colors. See Circuit Diagrams.
Diagnosis and Testing (dedicated to fault analysis and rectification)
Recommended special tools. Symptom chart; a ch
art contai
ning all relevant Diagnostic Trouble Code s (DTC), their possible causes and an
indication of the appropriate test.
Sp
ecific pinpoint test(s), de
signed so that fault diagnosis can be carr ied out in a logical and efficient manner.

Meter (measurement)m
Me
tric (screw thread, e.g.

M8)
M
MicrofaradMFDUni t
of electrical capacitance, one millionth of a farad
Mi
ll
imeter
mm
Mi
ll
imeter of mercury
mm
Hg
Mill
isecond
ms
Min
i
mum
mi
n.
Min u
te
minut
e
Model YearMY
ModuleMSelf
contained group of electrical/electronic components which is designed as
a single replaceable unit
Modulating signalMDA sh
ift process signal to the TCM on SC vehicles
Motorized In
-Car
AspiratorMIAD e
vice which constantly samples cabi
n temperature by passing air over a
sensor, and communicates with the A/ CCM to modify A/C system performance
to suit
Mult i Prot
ocol Adaptor
MPAAn i
n
terpreter for the various data
languages present on a vehicle
N
Nati
onal Institute of
Occupational Safety and
Health (US)
NIO S
H
Ne
wto
n
NSI unit of force. 1
N = 0.224
8 pounds force
Ne
wto
n meter
NmSI unit of torque. Must not be
co
nfused with nm (nanometer)
Ni
tr
ous Oxide
NO
xCompounds of nit rogen and oxygen fo rmed at high temperatures. Major
sourc
e of exhaust-gas air pollution
No
n
-Volatile Random
Access Memory
NVR A
M
R
A
M which retains memory even
if power supply is interrupted
Normal
ly aspirated
F
u
eling system using intake air at atmo
spheric pressure; not supercharged or
turbocharged
N ormal
ly Closed
NC
N
o
rmally Open
NO
No
r
th American
Specification
NASVehicles f or sal
e in the USA and Canadian markets
Nu
mbe
r
No
.
O
Oc
cupational Safety and
Health Administration
(US)
OS H
A
O
n
-Board Diagnostic
OB
DA system that moni
tors some or all co
mputer input and output control signals.
Signal(s) outside the pre-de termined limits imply a fault in the system or a
related system
O n
-Board Refueling
Vapor Recovery
OR V
R
O
riginal
Equipment
Manufacturer
OE M
Outp
ut
O/
PAn electrical o u
tput signal from a controlling device
Ou
ts
ide diameter
o.
d
ia
O
xides of
nitrogen
NO
x
Oxygen senso
r
O2
SA s
ensor which detects oxygen content in the exhaust gases
P
Parameter Identifi
erPIDAn in
dex number referring to a parame
ter within a module without knowledge
of its storage location
Park N e
utral Position
PN
P
Park N e
utral Position
Switch
PN PSIndic
ates the selected non-drive modes of the (automatic) transmission
Part numberpart no.
Portable Diag
nostic Un
it
PD
UCompre hen
sive electrical diagnosis system specific to Jaguar vehicles
Posi
ti
on
po
s'n
Power As si
sted Steering
PASHydraul
i
c pump-assisted steering system
Power Steer
i
ng Pressure
PSP
Programmable Elect
r
onic
Control Units System
PECU SProcess whereb y
a common ECM is progra
mmed on the production line to suit
the market requirements of a particular vehicle
Programmable Read-O
nly

PROMRO
M with some provision for setting
the stored data after manufacture

Suspension System - General Information - Wheel Bearing Inspection
Gene
ral Procedures


1.
Dur
ing use, a small amount of surplus grease may appear
around the bearing seal, this does not indicate a failed bearing
or seal. The grease should not be removed as this will act as an
additional barrier to the ingress of water or foreign matter.
Excessive end float or bearing ru mble will indicate a failed
bearing; for maximum permissibl e end float see specification
section. Take care not to confuse suspension ball joint or upper
or lower fulcrum bu sh movement for bearing end float.
If the hub is removed for any reason, a new bearing assembly
must be installed. Never at tempt to re-use a bearing.

Vehicle Dynamic Suspension - Vehicle Dynamic Suspension
Diagn
osis and Testing
Refer to the PDU User Guide for details of diagnosing and testing the Adaptive Damping System. The PDU interrogates the
ADCM directly via the K and L lines to the J1962 diagnostic socket.
The PDU will give an indication of the integrity of each electron ic and electrical component. It will indicate, for example, that
the accelerometers are not broken, but not that they functionin g correctly when the vehicle is in motion. However, it is
exceptional for an accelero meter to function incorrectly in its dynamic mode if it is proved to be functioning when static.
Basic Checks
The accele
rometers have the following ch
aracteristics. At 0g (no movement of the body) each vertical accelerometer
outputs approximately 2.5V steady voltage; the lateral acce lerometer outputs approximately 1.5V. The voltage output due
to body movement is proportional to acceleration in the acceleration axis, up to approximately 4.5V and down to
approximately 0.5V.
Before changing any component, refer to the circuit diagrams and check the cont inuity of relevant harness circuits; in some
instances, the PDU will not different iate between a faulty component an d a damaged connection or wiring.
Check the following fuses:
En
gine compartment fuse
box, fuse F5 (10A).
Engine m
anagement fuse
box, fuse F1 (20A).
Check the following ADCM input/output lines:
Sy stem erro
r output from the ADCM
to the instrument cluster.
Vehicl
e speed output from the inst
rument cluster to the ADCM.
Foo
tbrake signal to the ADCM.
Check any relevant connections to confirm that the connection is electrically sound and that a terminal pin has not been
pushed back into the connector shell, ie. not ma king a connection to its mating pin or socket.

It e
m
Par
t
Number
De
scr
iption
1—ABS /
T
CCM
2—E
n
gine compartment fuse-box
3—TCM (supercha
r
ged)
4—ECM

5—TCM (n ormally
aspirated)
6—Left rear
w
heel speed sensor
7—Ri
ght
rear wheel speed sensor

Pinpoint tests

W
S
S circuit: short
circuit to power
WSS f
ailure
C1
175Left -hand re
ar wheel speed
sensor (WSS) circuit failure
W S
S circuit: open
circuit
WS
S circuit: short
circuit to ground
W S
S circuit: short
circuit to power
WSS f
ailure
F
or l
eft-hand rear WSS test
s. GO to Pinpoint Test E.
C1267Modulat or valv
e failure
Supply volt
ages
to valve
solenoids or sensors out of range
Fo
r power and ground tests. GO to Pinpoint Test
A.
B1342CAN co
mmunication circuit
failure
CAN :
open circuit fault

CAN:
short circuit to
ground
CAN :
short circuit to
power
Fo
r CAN tests. GO to Pinpoint Test
F.
B1676Supply volt
age out of range
Supply voltage:
too
low
Supply volt age:
too
high
Check fo
r DTCs indicating a charging system fault.
Rectify as necesssary.
PI
NPOINT TEST A : MODULE
POWER AND GROUND SUPPLIES
TES
T
CONDITIONS
D E
TAILS/RESULTS/ACTIONS
A
1
: CHECK THE POWER SUPPLY FUSES
Make sure the igniti
on is turned off. 1
Chec
k fuses 04, 16 and 18 of the engine compartment junction box.
2
Are th
e fus
es in good condition?
Yes GO to A2
.
No
Install a new f
use as
necessary. Check the syst em for normal operation. If the fuse fails again,
check the circuit for a short circuit to ground. Refer to the electrical guides.
A2: CHECK THE PERMANENT
POWER SUPPLY (1) TO THE MODULE
Disc

onnect the ABS module connector, LF27.
1
Measure the voltage between LF
2
7, pin 09 (NR) and ground.
2
Is the vol
t
age greater than 10 volts?
Yes GO to A3
.
No Re
pair the circuit between the engine compartment
junction box, fuse 16, and LF27 pin 09. Refer to
the electrical guides. Clear the DTC, check for normal operation.
A3: CHECK THE PERMANENT
POWER SUPPLY (2) TO THE MODULE
Meas
ure t
he voltage between LF27, pin 25 (NW) and ground.
1
Is the vol
t
age greater than 10 volts?
Yes GO to A4
.
No
Re
pair the circuit between the engine compartment ju
nction box, fuse 18, and LF27 pin 25. Refer to
the electrical guides. Clear the DTC, check for normal operation.
A4: CHECK
THE IGNITION POWER SUPPLY TO THE MODULE
Make sure the ignition is on. 1
Measure the
voltage between LF 2
7, pin 20 (WU) and ground.
2
Is the vol
t
age greater than 10 volts?
Yes GO to A5
.
No Re
pair the circuit between the engine compartment ju
nction box, fuse 04, and LF27 pin 20. Refer to
the electrical guides. Clear the DTC, check for normal operation.
A5: CHECK
THE GROUND SUPPLY TO THE MODULE

Steering System - General Inform
ation - Steering System
D
iagnosis and Testing
I

nspection and Verification
1.
1. Verify t
he customer concern by driving the vehicle.
2. 2. Visually inspect for obvious signs of mechanical or electrical damage.
Mec
hanical Inspection Chart
Electrical Inspection Chart
Mechanical Checks
Incorrect
tire pressure, loose whee
l nuts, incorrect wheel alignment
Loose ti
e-rods
Loose dam

per and spring assemblies or ball joint
Loose s

teering column shaft universal joints
Loose pinc

h bolts on steering column shaft
Loose steeri

ng gear assembly
Check f

or external damage to the steering gear.
- Damaged tie-rods
-
CAUTION: If a steering gear assemb ly is returned under warranty with leaking seals, but there is also
damage to the steering gear boot/boots the steering gear warranty will be invalid. This is due to the steering
gear seals being damaged due to fore ign materials entering the steering gear boot and damaging the steering
gear seals thereafter.
Damaged steering gear boot
Damaged accessory driv
e belt
Bin

ding or misaligned steering co
lumn, pump or steering gear
Incorrect fluid
level
Hose leaks o

r line restrictions
Hose fou

ling bodywork
El

ectrical Checks/Tests
Make sure all

connectors are in plac
e (steering gear Servotronic solenoid and steering control module (SCM) - if
applicable)
Make su
re all the fuses are in place and not blown
D

ISCONNECT the steering gear transducer
and the steering should become heavy
TEST e
lectrical values:
- Power Supply to the SCM = 12 Volts
- Steering gear transducer resist ance 7.0 to 7.5 Ohms is normal
(
limits: less than 5 Ohms and greater than 9 Ohms would

be declared unacceptable)

- Steeri
ng gear transducer voltage = 6 Volts
- Steering gear transducer cu rrent = 840 mA at 0 mph reducing to 0 mA at maximum speed

The fluid reservo
ir:
Is lo

cated in the engine compartment, mounted on the engine compartment fuse box bracket.
Incorporates

a 10 micron, li
fetime, integral filter.
Has a cap
acity of 0.4 liter.
Has a dipsti

ck incorporated into the filler cap for checking the fluid level.
A new reservoir must be fitted if the steering rack, pump or fluid cooler are renewed.
Fluid C
ooler

P
arts List
The fluid cooler:
Is
resiliently mounted on th
e front body cross member.
Coo
ls the fluid before it is
returned to the reservoir.
Is
of the wire-bound tube type.
Has i

ntegral hoses.
Supply and Return Hoses a

nd Pipework
The supply and return h
oses and
pipework deliver fluid at high pressure from the pump to th e steering rack assembly. The
fluid is then returned to th e reservoir through the cooler tube. The high pressure supply hose contains two cable-type
attenuators, one at each end, to reduce nois e. The return pipe is clipped to the steering rack housing by a resilient
mounting.
It
em
Par
t Number
De
scription
1—Fl

uid reservoir
2—Supply line
3—R

eturn line
4—Fi

ller cap
It

em
Par
t Number
De
scription
1—Front body cross member
2—F

luid cooler
3—Inte

gral hoses
4—Cooler m

ounting


P
arts List