1998 JAGUAR X308 vin

All the above fi
gures
are at "showroom" height. (See ride height section above).
Tires must be infl
ated
to normal pressure.
For additional informat ion, refer to Section 204
-04
Wheels and Tires
.
Wh
eel Alignment - Rear Camber

All the above figu res
are at "s
howroom" height. See vehicle ride height section above.
Tires must be infl
ated
to normal pressure.
For additional informat ion, refer to Section 204
-04
Wheels and Tires
.
W
h
eel Alignment - Rear Toe

All the above figu res
are at "s
howroom" height. See vehicle ride height section above.
Tires must be infl
ated
to normal pressure.
For additional informat ion, refer to Section 204
-04
Wheels and Tires
.


1 998 to
2003.5
VIN - 812317 to F59525
Units
Cambe r

Left
Hand
Rig
h
t Hand
Bal
a
nce (RH - LH)
Min MaxMin MaxMinMax
All MarketsDe
grees
/Minutes
-
1
° 12'
-0
° 06'-1° 12'-0
° 06'
-1
°
00
+1
°
00
De
ci
mal Degrees
-1.
2
0°
-0
.1
0°
-1.
2
0°
-0.
1
0°
-1.
0
0°
+1
.00
°
1
998 to
2003.5
VIN - 812317 to F59525
Units
To e

Left
Hand
Rig
h
t Hand
To
t
al Toe
Thr
u
st Angle
MinMaxMinMaxMin MaxMin Max
All MarketsDe
grees
/Minutes
+0
°
05'
+0
° 15'+0°
05'
+0
° 15'0°
10'
+0
° 30'-0° 05'+0 °
05'
De
ci
mal Degrees
+0
.08
°
+0
.25
°
+0
.08
°
+0
.25
°
0.
17
°
+0
.50
°
-0.
0
8°
+0
.08
°

Suspension System - General Information - Front Camber and Caster
Adjust
ment
Gen
eral Procedures
• NOTE: Before any work is commenced, th e vehicle must be checked to establish that it conforms to the Jaguar original
specification, e.g. wheels, ti res, tire pressures, etc.
• NOTE: The vehicle must be unladen and the fuel tank full when measuring suspension geometry.

1.
Road test the vehicle to establish the exact nature of the
complaint, e.g. pulling to one side, wander.
2. Measure the suspension geometry, fill in the 'Suspension
Geometry Record Form', and co ntact Jaguar Technical Support
for assistance.
3. Technical Support will give advice on the course of action to be
taken to rectify the problem.
4. Each lower wishbone pivots on and is secured to the front
crossbeam by two fulcrum bolts. A circular eccentric flange
formed under the hexagonal head of each fulcrum bolt, has
raised graduation marks to indicate radial position. A washer
with a 'D' shaped hole locates on a flat on the threaded section
of each bolt. This ensures that the washer rotates with the bolt,
maintaining an eccentric position corresponding with the
flanged head. The outer face of the washer is punch marked,
ensuring correct instal lation with the chamfered face inwards.
This permits the washer to rotate freely in the crossbeam cam
reaction plate during a djustm ent. Each fulcrum bolt and
washer are secured by a self locking nut.
On rotation of the bolt, lateral movement of the eccentric flange
and washer is restricted by the cam plate faces, forcing the bolt
shank to move laterally in the crossbeam slots. Lateral
movement of the bolt shank re sults in corresponding inward
and outward movement of th e wishbone arm, effecting
adjustment of wh eel alignment.
Rotation of the front fulcrum bolt principally adjusts wheel
caster angle, with a small amount of camber angle change.
Adjustment of the rear fulcrum bo lt mainly alters wheel camber
angle with a small amount of caster angle change.
On vehicles with VIN up to 833124, fulcrum bolt eccentric
flanges have raised graduation marks representing 15 degree
increments of bolt rotati on from 0 to 90 degrees.
On vehicles with VIN from 833125, the fulcrum bolt graduation
marks represent bolt shank ho rizontal movement in 1mm
increments from 0 to 3mm.
The upper wishbone and fulcrum shaft are not adjustable and
play no part in steering geometry adjustment.

8. R
emove rotor nut.
U

sing special tool 206-066A remove rotor nut.
9. Remove vertical link and hub assembly from special tool.

10
.
CAUTION: Removing the hu b from the vertical link
damages the wheel bearing. A new wheel bearing MUST be fitted
to the vertical link.
Using a hydraulic press, remo ve hub from vertical link.
1. Place special tool on press bed.
2. Position vertical link and hub assembly into tool collets.
3. Ensure one of the disc sh ield screw-bosses is in the
center of one of the tool collets.
4. Position special tool on top of hub.
5. Operate press to remove hub from vertical link.

11
.
Using special pliers, remove an d discard the inboard circlip
from the vertical link.
12. Using special pliers, remove an d discard outboard circlip from

8. R
emove rotor nut.
Using speci

al tool remove rotor nut.
9. Remove vertical link and hub assembly from special tool.

10
.
CAUTION: Removing the hu b from the vertical link
damages the wheel bearing. A new wheel bearing MUST be fitted
to the vertical link.
Using a hydraulic press, remo ve vertical link from hub .
1. Place special tool on press bed.
2. Position vertical link and hub assembly in tool collets.
3. Ensure one of the disc sh ield screw-bosses is in the
center of one of the tool collets.
4. Position special tool on top of hub.
5. Operate press to remove vertical link from hub.

11
.
Using special pliers remove an d discard the inboard circlip
from the vertical link.

12
.
Using special pliers remove an d discard outboard circlip from
the vertical link.
13. NOTE: Ensure the vertical link is level, and the supports are
situated as near to the bearing bore as possible.

Is hard-wi
red to the instrume
nt cluster message center.
Is hard
-wired to the J1962 diagnostic connector.
Op
era
tion
Th
e
system selects the soft or
firm damper setting according to the current ro ad and driving conditions, to optimise vehicle
ride and handling.
With the vehicle stationary, the dampers are in the firm setting, but will normally switch to the soft setting when the vehicle
exceeds 8 km/h (5 mile/h); all dampers are switched simultaneously.
Sudden movement of the vehicle body, in response to road inputs, is detected by the vertical accelerometers, and the ADCM
switches the dampers to the firm setting to give improved damping of the resultant oscillations.
When cornering forces are detected by th e lateral accelerometer, the ADCM switches the dampers to the firm setting to
reduce the roll rate an d improve wheel control.
After the event has passed, the dampers revert to the soft setting.
When the footbrake is applied, the ADCM re ceives a signal and calculates the rate of vehicle deceleration. If the deceleration
rate is greater than a certain threshold, the dampers are switched to the firm setting to reduce the pitch rate and improve
wheel control.
If a system failure occurs, the ADCM grounds the output line to the instrument cluster message center, which displays a
text warning SUSPENSION FAULT and illuminates the amber warning lamp. Under fault conditions the system always fails to
the firm setting, so that the vehicle will be safe to drive un der all road and driving conditions.
Connector Pin Identity Chart for EM068

Pin
Number
Ci
rcui
t
Circuit Functi
on
1System erro
r output to instrument
cluster
2Not
used
3O/
P a
ccelerometer ground
4 to

9
Not
used
10K-
li
ne to diagnostic socket
11Ignition su
pply +12V
12Not
used
13Control signal (+ve) output
to l
eft-hand rear damper
14Control signal (+ve) output
to right-hand front damp
er
15Control signal (+ve) output
to right-hand rear
damper
16
a
nd 17
No
t
used
18Ground
19No
t
used
20Lateral
accelerometer i
nput
21Front vertical ac
celerometer in
put
22Rear vertical
acce
lerometer input
23No
t
used
24R
o
ad speed input from
instrument cluster
25Power output +5V to suppl y accelerometers
26Brake peda
l input

Do t
he disc brake caliper pistons
and pins bind, leak or stick?
Yes INSTALL new calipers as necessary. TE ST the system for normal operation.
No GO to C4
.
C4: INSPECT BR
AKE DISCS
Check the brake discs fo

r excess
ive damage, thickness variatio n or runout. For additional
information, refer to General Procedures in this section.
1
D
oes excessive damage or runout exist?
Yes INSTALL new brake discs and brak e pads as necessary. TEST the system for normal operation.
No GO to C5
.
C5: INSPECT THE FRONT HU
B AND WHEEL BEARING ASSEMBLY
Check the fr

ont hub and wheel bearing assembly.
For additional information, refer toSection 204
-00

Su

spension System
- General
Information
. 1
Are th

e wheel bearings OK?
Yes GO to C6
.
No

INSTALL new wheel bearings. For additional inform ation, refer toSection 204
-01
Front Suspension
.
TEST the system
for normal operation.
C

6: CHECK SUSPENSION BUSHES AND BALL JOINTS.
Chec

k all suspension bu
shes and ball joints.
1
Are th
e suspension bushes and ball joints OK?
Yes Vehicle is OK.
No INSTALL new front suspension bushes and ball joints as required. For additional information, refer
toSection 204
-01
Front Suspension
. INSTALL n
ew rear suspension bush
es and ball joints as required.
For additional informat ion, refer toSection 204
-0
2 Rear Suspension
.
P

INPOINT TEST D : THE PEDAL FEELS SPONGY
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
D

1: CHECK FOR SPONGY PEDAL (ENGINE OFF)
Check f

or a firm brake pedal.
1
Is th

e brake pedal effort an
d brake pedal travel normal?
Yes Vehicle is OK.
No GO to D2
.
D2:
CHECK BRAKE PEDAL RESERVE (ENGINE OFF)
Pump th

e brake pedal 10 times and
hold on the final application.
1
Does th
e brake pedal feel fi
rm on final application?
Yes GO to D3
.
No

BLEED the brake system. For additional information, re fer to General Procedures in this section. TEST
the system for normal operation.
D3:
CHECK BRAKE PEDAL RESERVE (ENGINE ON)
Engine is

idle.
1
Apply the brake pedal ligh

tl
y three or four times.
2
W
ait 15 seconds for the vacuum to recover.
3
Push down on

the brake pedal until it stops moving
downward or an increased resistance to the brake
pedal travel occurs.
4
Hol
d the brake pedal in the applied position while increasing the engine speed to 2000 revs/min.
5
Re

lease the accelerator pedal.
6
Does th

e brake pedal move downward as
the engine speed returns to idle?
Yes GO to D4
.
No

CHECK the vacuum to brake booster. For additional information, refer toSection 206
-0
7 Power Brake
Actuation.

D4: CHECK
BRAKE FLUID LEVEL
Check the brake master cyli
nd
er reservoir fluid level.
1
Is the fl
ui
d level OK?
Yes BLEED the brake system. For additional information, re fer to General Procedures in this section. TEST
the system for normal operation.
No CHECK brake master cylinder reservoir sealing points. For additional information, refer to Brake
Master Cylinder in this section. ADD fluid and BL EED the brake system. For additional information,
refer to General Procedures in this section. TEST the system for normal operation. REPEAT road test if
necessary.
P I
NPOINT TEST E : THE
PEDAL GOES DOWN FAST
TES
T
CONDITIONS
D E
TAILS/RESULTS/ACTIONS
E1
:
ROAD TEST VEHICLE
Road test and apply th
e brake peda
l.
1
Is th
e brake pedal ef
fort an
d brake pedal travel normal?
Yes Vehicle is OK.
No GO to E2
.
E2: CHECK BRAK
E FLUID LEVEL
Check the brake master cyli
nd
er reservoir fluid level.
1
Is
t
he fluid level within specification?
Yes GO to E3
.
No
CH
ECK the brake master cylinder reservoir sealing po
ints. For additional information, refer to Brake
Master Cylinder Component Test in this section. ADD fluid and BLEED brake system. For additional
information, refer to General Proc edures in this section. TEST the system for normal operation.
REPEAT road test if necessary.
E3 : CHECK BRAK
E PEDAL TRAVEL-PRESSURIZE SYSTEM
Pump th
e brake pedal rapidly (f
ive times).
1
Does th
e brake pedal trav
el build up and then hold?
Yes BLEED the brake system. For additional information, re fer to General Procedures in this section. TEST
the system for normal oper ation. REPEAT road test.
No GO to E4
.
E4: CHECK FOR
BRAKE SYSTEM LEAKS
Chec
k for e
xternal brake system leaks. For additional information, refer to Master Cylinder in this
section.
1
Are le aks foun
d?
Yes REPAIR as necessary, ADD fluid and BLEED brake syst em. For additional information, refer to General
Procedures in this section. TEST the system for normal operation. REPEAT road test.
No System is OK.
PINPOINT TEST
F : THE PEDAL GOES DOWN SLOWLY
TES
T
CONDITIONS
DE
TAILS/RESULTS/ACTIONS
F1
:
ROAD TEST VEHICLE - CHECK BRAKE PEDAL OPERATION
Chec
k
if the condition occurs duri
ng actual stopping application by applying the brake pedal while
the vehicle is moving.
1
Doe s
the condition occur when the vehicle is moving?
Yes GO to F2
.
No
GO to F
3
.
F2:
CHECK
FOR BRAKE SYSTEM LEAKS
Chec
k for e
xternal brake system leaks. For additional information, refer to Master Cylinder in this
section.
1

Yes

Vehicle is OK.
No GO to J2
.
J
2: CHECK BRAKE FLUID LEVEL
Check the brake master cyli

nder reservoir fluid level.
1
Is the fl

uid level OK?
Yes GO to J3
.
No

CHECK brake master cylinder reservoir sealing points. For additional information, refer to Brake
Master Cylinder in this section. ADD brake fl uid and BLEED the brake system. For additional
information, refer to General Proc edures in this section. TEST the system for normal operation.
REPEAT road test if necessary.
J
3: CHECK BRAKE PEDAL RESERVE
Engine is

idle.
1
Apply the brake pedal ligh

tl
y three or four times.
2
W
ait 15 seconds for the vacuum to replenish.
3
Push down on

the brake pedal until it stops moving
downward or an increased resistance to the brake
pedal travel occurs.
4
Hol
d the brake pedal in the applied position while increasing the engine speed to 2000 revs/min.
5
Re

lease the accelerator pedal.
6
Does th

e brake pedal move downward as
the engine speed returns to idle?
Yes GO to J4
.
No

CHECK the vacuum to the brake booster. Fo r additional information, refer toSection 206
-0
7 Power
Brake Ac

tuation
.
J

4: CHECK THE FRONT HUB AND BEARING ASSEMBLY
Check the fr

ont hub and bearing assembly. Fo
r additional information, refer toSection 204
-01
Front
Suspe

nsion
. 1
Are th

e front wheel bearings loose?
Yes INSTALL a new front wheel bearin g if damaged. For additional information, refer toSection 204
-01

F

ront Suspension
. TEST
the system for normal operation.
No CHECK the front brake discs for thickness variances. For additional information, refer to General
Procedures in this section.
PINPO
INT TEST K : SLOW OR INCOMPLETE BRAKE PEDAL RETURN
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
K1: C

HECK FOR BRAKE PEDAL RETURN
Ru

n the engine at fast idle while
making several brake applications.
1
Pull the
brake pedal rearward with approximately 44.5 N (10lb) force.
2
Relea

se the brake pedal and measure
the distance to the toe board.
3
Make a hard brake
application.
4
Relea

se the brake pedal and measure the brake
pedal to toe board distance. The brake pedal
should return to its original position.
5
Does th
e brake pedal return
to its original position?
Yes Vehicle is OK.
No GO to K2
.
K
2: CHECK FOR BRAKE PEDAL BINDING
Check the brake pedal to make
s
ure it is operating freely.
1
Is th

e brake pedal operating freely?
Yes INSTALL a new brake booster. For addi tional information, refer toSection 206
-0
7 Power Brake
Actuation. TEST

the system for normal operation.
No REPAIR or INSTALL new brake pedal. TE ST the system for normal operation.