1998 JAGUAR X308 tow

It is a reciprocating two
-circuit pu
mp in which one brake circuit is as signed to each pump circuit.
It supplies th
e fluid pressure and vo
lume to supply the brake circuits under ABS and Traction control.
The pump is driven by an electri
c motor, with the pump
housing incorporating two lo w pressure accumulators and
damping chambers for each brake circuit.
The ac cu
mulator stores the pressure and smooths out the output pu
lses from the pump.
ABS Warning Lamp
The sys
tem will be set in a fail-safe mode if a problem is de
tected; a warning lamp on the instrument panel will notify the
driver there is a problem.
Anti-Lock Braking Sy
stem (ABS)
The AB
S components are combined with
an hydraulic booster and a tandem master cylinder to provide a two circuit braking
system. The system comprises, four wheel speed sensor s, a brake control modulator and an ABS warning lamp.
Should a wheel start to lock-up during braking a signal tr ansmitted from the wheel speed sensor to the brake control
modulator will start the hydraulic pump. The brake control modula tor will close the input valve of the line connected to the
locked-wheel to stop any increase in fluid pressure to the br ake caliper. If this fails to prevent the wheel locking, the
pressure in the caliper will be decreased by opening the return valve until th e wheel starts accelerating again. The fluid
pressure from the return va lve is directed into the low pressure accumulator, housed in the pump.
From the low pressure accumulator, fl uid is pumped through the damping cham ber to the brake master cylinder. The
pressure to the brake caliper will then be increased in small steps to maintain maximum adhesion between the tire and road
surface. This is achieved by closing the return valve, and opening the input valve and using the hydraulic pump to increase
the pressure.
Although the system senses all four wheels independently, the rear wheels are regulated as a pair. If a sensor on a rear
wheel detects a wheel decelerating rapidly, then the fluid pressure to both wheels is reduced. The fluid pressure is then
dictated by the wheel having the lowe st adhesion with the road surface.
The ABS system will be set in a fail-safe mode if a problem is detected; a warn ing lamp on the instrument panel will notify
the driver there is a problem. The brake system will still operate conventionally and with the same standard of performance
as a vehicle not equipped with ABS.
Automa tic Stability Control (ASC)

Th
e ASC utilizes the ABS sensing arrangement to provide the maximum traction force to propel the vehicle.
The ASC is switched on when the engine is started. The system can be switched off by pressing the 'ASC OFF' (the switched
is marked 'TRAC OFF' on vehicles fitted with traction control). The switch, which is situated in the center console switchpack,
lights up to warn that the system is sw itched off. An 'ASC' amber warning light flashes on the instrument panel when the
system detects a spinning wheel.
The ASC system uses engine intervention to reduce the torque delivered to the drive wheels to prevent them spinning.
Engine torque is re duced in three ways:
The
throttle is moved towards the closed position.
The ignition is retarded. F
u
el is cut-off at the cylinder injectors.
Wheel spin is detected by the wheel sp eed sensors and communicated to the AB S/TCCM. The ABS/TCCM uses information
from the controller area network (CAN) to calculate the torque that the engine should produce to stop the wheel spinning.
Torque reductions are then requested from the engine control module (ECM ) through the CAN. The throttle is then
positioned to provide the target torque, which has been calculated to prevent wheel spin. During the transient phase of
torque reduction the fuel is cut-off and th e ignition retarded Both the fuel cut-off an d ignition retard will be restored to
normal when the throttle is set to its new position.
The ASC uses a brake control modulator with six solenoid va lves: three normally open inlet valves and three normally

The driver air bag is moun
ted below the horn operat
ing pad area, adjacent to the steering wheel hub.
For air bag safety and service information, refer to Section 501
-20A Safety Belt
System
Sectio
n
501
-2
0B Supplemental
Re

straint System
.
Upper Steering Column


Motorized Upper Colu
mn Assembly

The motorized upper steering column:
Is adjustable for both til
t and reach.
Has a col

umn adjustment switch installed on
the left-hand side of the lower cowl.
W
ill automatically move to the uppermost tilt and innermost reach position, when the automatic driver entry and exit

function is selected.
Has an instrument li
ghti
ng dimmer switch installed on the left-hand side of the lower cowl.
The steering column adjustment switch:
Controls steeri
ng column reach by
movement of the switch towards an d away from the steering wheel.
Controls steeri
ng column tilt by mo
vement of the switch up and down.
Has two
rotary positions, AUTO and OFF, for selecting the
automatic entry and exit steering column tilt function.
It
em
Par
t Number
De
scription
1-Upper

cowl

2-Lower cowl
3-Ste
ering column adjustment switch
4-Di

mmer switch

o
perating. If an indicator bulb fails, the warning
lamp and ticking operate at twice the normal rate.
Sidelam
ps and Headlamps
Thes
e are controlled by rotating the end of the column switch as follows.
In the OFF position:
All
exterior lamps are switched OFF.
In the sidelamp position:
The front
sidelamps, tail, license plate and any other la
mps required by local legislation are switched ON.
The
sidelamps tell-tale lamp illuminates.
In the headlamp position, with the ignition switch in position II:
The h
eadlamps are switched ON in addition to the lamps switched on in the sidelamp position.
If the ignition is switched to the OFF position with the column switch in the headlamp position, the sidelamps, tail and
license plate lamps will stay ON, but the headlamps will switch OFF.
In the AUTO position (where fitted), with the ignition switch in position II:
Th
e sensor mounted on the back of the interior rear view
mirror monitors exterior light levels and automatically
switches the sidelamps and di pped headlamps ON and OFF.
The sensitivity level can be adjusted by turn ing the sensor control knob on the back of the interior mirror, left to decrease or
right to increase. The sensor must not be covered and the windscreen must be kept clean.
Headlamp Main Bea
m Position
Wi
th the column switch in
the headlamp position:
Movin
g the switch stalk away fro
m the steering wheel switches the headlamps to main beam.
Movin
g the switch stalk towards the steering wheel switches the headlamps to dipped beam.
The main beam tell-tale lamp illuminates when the headlamps are switched to main beam.
Ma
in Beam Flash
Wi
th the ignition switch and column switch in any position:
Pulling the

switch stalk agains
t spring pressure towards th e steering wheel illuminates the headlamps on main beam
for as long as the switch is held.
The main beam tell-tale lamp illuminates while the headlamps are illuminated.
M
essage Center Functions
T
he message center functions:
Are se

lected by the button located at the end of the lighting switch stalk.
Are se

lected in turn, by repeatedly pressing the button,
from the odometer reading, through the trip computer data
in sequence, and back to th e odometer reading again.

The wiper and washer switch i s
on the righ
t-hand side of the steering column and controls the fo llowing functions when the
ignition switch in position II.
In the OFF position:
The windscreen wiper is stationary and in the parked positio
n.
In the intermittent wipe position:
The wi per ope
rates intermittently, with
a variable time delay between wipes.
The time del
ay can be varied by rotating the column sw
itch collar, which has six positions and varies the delay
between two and 20 seconds. The collar is turned counter-clockwise to increase the delay.
In the normal speed position:
The wiper oper a
tes continuously at normal speed.
In the high speed position:
The wiper ope r
ates continuously at high speed.
Flick wipe operation:
Is obt
ained by pulling the switch
stalk towards the steering wheel.
F
e
atures a single wipe at normal speed if
the switch stalk is released immediately.
Fe
atures continuous wipe action
at normal speed while the swit ch stalk position is held.
Wash/W
ipe Operation
Th
e
wash/wipe function:
Is operat
ed by th
e button at the end of the switch stalk.
Op
erate
s the washers and wiper, while the butt
on is depressed, for up to 20 seconds.
Provides an addit
ional three sweeps of
the wiper after the button is released.
Provid
es a single drip-wipe sweep, four seconds af
ter the wash/wipe sequence has been completed.
Is disabled if the 'Washer Flu
id Low' message is di
splayed, but manual operat ion is still available.
Ite
m
De
scr
iption
1W
i
per off position
2Intermittent
wipe position
3Normal
speed wiper position
4High
speed wiper position
5Flick wipe position
6Wa
sh/wipe button
7D
e
lay adjustment collar

The was
h
/wipe button also operates the head
lamp power wash function (where fitted).
Wiper and Washer Switch

1
2.60.48.
12. Install the old bolt which secu red the crankshaft damper, to
allow the crankshaft to be rotated. Use a new bolt on final
installation.
13. The following group of instructions (until stated otherwise)
describe the procedure to rene w the bearing shells in one
connecting rod. Repeat the instructions as necessary.

14
.
Rotate the crankshaft until th e required connecting rod bolts
are accessible.
1. Remove the bolts which secure the bearing cap.
2. Note the position of the identification marks and remove the cap.
Remove the
bearing shell from the cap and note the grade

(colour coded).

15
.
Carefully move the connecting rod and piston assembly
towards the cylinder head to di sconnect it from the crankshaft.
Rotate the crankshaft slightly if necessary.

16
.
Remove the bearing shell from the connecting rod and note
the grade (colour coded). The crankpin grades are also
stamped on the cylinder block.
17. Refer to the Specification Sectio n for details of the crankpin
and bearing shell grades.
18. Clean all components and mating faces.
19. Install and align the new bearing shell to the connecting rod.

20. Apply new en
gine oil to the co
nnecting rod bearing and to the
crankpin.

21. Carefull
y move the connecting
rod and piston assembly
towards the the crankshaft and connect it to the crankpin.
Rotate the crankshaft slightly if necessary.
22. If necessary, refer to the Spec ification Section for details of
piston and connecting rod orientation.

23 . Install and alig
n the new bearin
g shell to the connecting rod
cap.
24. Apply new engine oil to the bearing shell.

25 . Install th
e cap and NEW bolts to the connecting rod.
1. Note the position of the identification marks and install the cap so that the identification marks are
adjacent to those on the connecting rod.
2. Install the new bolts whic h secure the bearing cap.
26. Tighten the bolts as follows:

Engine - Crankshaft
Rear Seal4.0L
NA V8 - AJ27/3.2 L NA V8 - AJ26
In-v
ehicle Repair
Remov

al
S
pecial Tool(s)
Crankshaft Rear Oi

l Seal Remover /
Replacer.
303 - 538
1. Open the engine compartment and fit paint protection sheets.

2. Di
sconnect the batt
ery ground cable.
R
emove the battery cover.
3. Remove the transmission. Refer to Operation 44.20. 01 in
Section 307-01A.
4. Remove the drive plate. Refer to Operation 12.53.13.

5. F
it and align the seal removal tool 303 - 538 to the crankshaft.
1. Unscrew the two nuts towards the head of each bolt to allow the bolts to fit fully into the crankshaft.
2. Unscrew the center bolt until it is below the face of the main tool and position the tool to the rear of the
crankshaft.
3. Lightly tighten the two bolts so that they fully locate in the crankshaft.

6. Hold the tool against th
e cran
kshaft and lightly and evenly
tighten the two nuts to the face of the tool; to secure the tool
and to hold it parallel to the face of the crankshaft.
7. Secure the oil seal to the tool using the three self-tapping

Engine - Crankshaft Rear Seal4.0L SC V8 - AJ26
In-vehic
le Repair
Remov
a
l
S
p
ecial Tool(s)
Crankshaft Rear Oi
l Seal R
emover /
Replacer.
303 - 538
1. Open the engine compartment and fit paint protection sheets.

2. Disc
onnect the batt
ery ground cable.
Re
move the battery cover.
3. Remove the transmission. Refer to Operation 44.20. 01 in
Section 307-01B.
4. Remove the drive plat e. Refer to Operation (SC) 12.53.13.

5. Fi
t and align the seal removal tool 303 - 538 to the crankshaft.
1. Unscrew the two nuts towards the head of each bolt to allow the bolts to fit fully into the crankshaft.
2. Unscrew the center bolt until it is below the face of the main tool and position the tool to the rear of the
crankshaft.
3. Lightly tighten the two scre ws so that they fully locate
in the crankshaft.

6. Hold the tool against th e cr
an
kshaft and lightly and evenly
tighten the two nuts to the face of the tool; to secure the tool
and to hold it parallel to the face of the crankshaft.
7. Secure the oil seal to the tool using the three self-tapping