warning light JAGUAR X308 1998 2.G Workshop Manual

General Infor
mation - Gene
ral Service Information
Description an
d Operation
Safety Notice


Appropri
ate service me
thods and proper repair procedures are essential for the safe, reliable operation of all motor vehicles,
as well as the safety of the person do ing the work. This manual provides genera l directions for accomplishing service and
repair work with tested, effect ive, techniques. Following them will help assure reliability.
There are numerous variations in procedures, techniques, tools, and parts for servicing vehicles, as well as in the skill of the
person doing the work. This manual cannot possibly anticipate all such variations and provide advice or cautions as to each.
Accordingly, anyone who depart s from the instructions provided in the manua l must first establish that neither personal
safety nor vehicle integrity is compromised from choices of methods, tools or parts.
Notes, Ca
utions and Warnings
Throughout
this manual, important inform
ation is highlighted by the use of notes, cautions and warnings. NOTES give
additional information on a topic or proc edure, CAUTIONS are given to prevent da mage to the vehicle, and WARNINGS are
given to prevent personal injury.

Worksh
op Manual Organization
This
manual incorporates descript
ive, diagnostic, and repair information to help trained Jaguar technicians complete service
and rectification procedures. The informat ion can be accessed by choosing the appropriate five digit section number. For
example, Section 412-03 covers air conditioning , which is part of the Climate Control System.
The manual is organized into groups covering generic aspects of the vehicle systems; the first digit of the section
number represents a group se lected from the following:
1. General Information.
2. Chassis.
3. Powertrain.
4. Electrical.
5. Body and Paint.
Each of the groups comprises sections re lating to specific areas of the vehicle.
The second and third digits of the section number indicate the vehicle system.
The last two digits of the se ction number define the system covered, more specifically.
Each section comprises one or more of the following sub-sections:
Specification

Ensure spring
upper se
at is correctly positioned in turret.
Engage tool dowel in turret slo
t.
R
o
tate adjuster of Special Tool 204-111 to lightly tension
spring.

17 . Ins
tall guide pins ( supplied with Special Tool 204-111) in
spring pan/wishbone bolt locations.

18 . WARNING: WHE
N ROTATING TOOL ADJUSTER, ENSURE
THAT TOOL STEM DOES NOT TU RN AND DISTURB POSITION OF
DOWEL IN SUSPENSION TURRET.
Install spring pan to wishbone securing bolts.
Ro t
ate tool adjuster to gradua
lly increase spring tension.
Pr
ogressively install but do no
t tighten spring pan securing
bolts.
Tigh ten spring pan
bolts to 70-90Nm.
Ensure spri
ng
lower seat is co
rrectly positioned in spring
pan.

19 . WARNING: WHE
N ROTATING TOOL ADJUSTER, ENSURE
THAT TOOL STEM DOES NOT TU RN AND DISTURB POSITION OF
DOWEL IN SUSPENSION TURRET.
Remove Special Tool 204-111 from suspension.
Rotat
e adjuster of Special Tool to release tension on
spring.
R otate
tool stem to release dowel from turret.
With
draw tool and adaptor
.assembly.
20
. Lower vehi
cle to working heig
ht and support on stands.
21. Install wheel speed sensor.
Positi
on wheel speed sensor on vertical link.

2. Ins
tall Special Tool 204-111 and spring assembly in suspension

turret.
P
osition spring assembly and Special Tool in suspension
turret.
Ensure spri
ng upper rubber se
at is correctly positioned
and fully seated.
Engage tool
dowel in turret slot.

3. Position spr
ing pan on lower wishbone.
Ro

tate adjuster of Special Tool to lightly tension spring.
Al

ign spring pan with lower wishbone bolt locations.

4. Inst
all suitable guide pins in
spring pan/wishbone bolt
locations.
5. WARNING: WHEN ROTATING TOOL ADJUSTER, ENSURE
THAT TOOL STEM DOES NOT TU RN AND DISTURB POSITION OF
DOWEL IN SUSPENSION TURRET.
Install spring pan to wishbone securing bolts.

2. Ins
tall Special Tool 204-111 and spring assembly in suspension

turret.
P
osition spring assembly and Special Tool in suspension
turret.
Ensure spri
ng upper rubber se
at is correctly positioned
and fully seated.
Engage tool
dowel in turret slot.

3. Position spr
ing pan on lower wishbone.
R

otate adjuster of Special Tool 204-111 to lightly tension
spring.

4. Install guide pins ( su
pplied wi
th Special Tool 204-111) in
spring pan/wishbone bolt locations.
5. WARNING: WHEN ROTATING TOOL ADJUSTER, ENSURE
THAT TOOL STEM DOES NOT TU RN AND DISTURB POSITION OF
DOWEL IN SUSPENSION TURRET.
Install spring pan to wishbone securing bolts.

Comp
onent Tests
Bra
k
e Booster
1.
1. Chec k all
hoses and connections. All unused vacuum connectors should be capped. Hoses and their connections
should be correctly secured and in good condition with no holes and no collapsed areas. Inspect the valve on the
brake booster for damage.
2. 2. Check the hydraulic brake system for leaks or low fluid.
3. 3. With the transmission in PARK, stop the engine and apply the parking brake. Pump the brake pedal several times
to exhaust all vacuum in the system.
4. 4. With the engine switched off and all vacuum in the system exhausted, appl y the brake pedal and hold it down.
Start the engine. If the vacuum system is operating, the brake pedal will tend to move downward under constant
foot pressure. If no motion is felt, the vacuum booster system is not functioning.
5. 5. Remove the vacuum hose from the brake booster. Manifold vacuum should be available at the brake booster end
of the hose with the engine at idle speed and the transm ission in PARK or NEUTRAL. Make sure that all unused
vacuum outlets are correctly capped, hose connectors are correctly secured and vacuum hoses are in good
condition. When it is established that manifold vacuum is available to the brake booster, connect the vacuum hose
to the brake booster and repeat Step 3. If no downward movement of the brake pedal is felt, install a new brake
booster.
6. 6. Operate the engine for a minimum of 10 seconds at a fast idle. Stop the engine and allow the vehicle to stand for
10 minutes. Then, apply th e brake pedal with approximately 89 N ( 20lb) of force. The pedal feel (brake
application) should be the same as that noted with the engine running. If the brake pedal feels hard (no power
assist), install a new valve and then re peat the test. If the brake pedal still feels hard, in stall a new brake booster.
If the brake pedal movement feels spongy, bleed the brak e system. For additional information, refer to General
Procedures in this section.
Bra k
e Master Cylinder
Usual
l
y, the first and strongest
indicator of anything wrong in the brake syst em is a feeling through the brake pedal. In
diagnosing the condition of the brake master cylinder, check pedal feel as evidence of a brake concern. Check for brake
warning lamp illumination and the brake fluid le vel in the brake master cylinder reservoir.
Normal Conditio
ns
The fo
llowing conditions are considered norm
al and are not indications that the brake master cylinder is in need of repair.
New bra
ke systems are designed to produc
e a pedal effort that is not as hard as in the past. Complaints of light
pedal efforts should be compared to the pedal effort s of another vehicle of the same model and year.
The fl
uid level will fall with brake pad wear.
Abnormal Conditions
•

NOTE: Prior to carrying out any diag
nosis, make sure the brake system warning indicator is functional.
Changes in the brake pedal feel or brake pedal travel are in dicators that something could be wrong in the brake system. The
diagnostic procedure and techniques use brake pedal feel, warning indicator illu mination and low brake fluid level as
indicators to diagnosing brake system co ncerns. The following conditions are cons idered abnormal and indicate that the
brake master cylinder is in need of repair:
Brake ped a
l goes down fast. Th
is could be caused by an ex ternal or internal leak.
Brake pedal goes down slowly
. This could be
caused by an internal or external leak.
Brak
e pedal is low or feels spongy. This condition may be ca
used by no fluid in the brake master cylinder, reservoir

cap ven
t holes clogged or air in the hydraulic system.
Brake ped

al effort is excessive. This ma
y be caused by a bind or obstruction in the pedal/linkage, a faulty non return
valve, booster or insuffi cient booster vacuum.
R
ear brakes lock up during light pedal force. This may
be caused by damaged brake pads, an incorrectly adjusted
parking brake, a partially applied parking brake, a damaged ABS sensor or bearing failure.
Brake ped
al effort erratic. This condition could be caused by the brake booste
r or incorrectly installed brake pads.
Brake warning indicator i
s on. This may be caused
by low fluid level or float assembly damaged.
No
n Pressure Leaks
Any reduced fluid v
olume in the brake ma
ster cylinder reservoir condition may be caused by two types of none pressure
external leaks.
Type 1: An external leak may be occur at the master cylinder reservoir cap because of incorre ct positioning of gasket and
cap. Reposition cap and gasket.
Type 2: An external leak may occur at th e reservoir mounting seals. Repair such a leak by installing new seals and make
sure that the reservoir retainin g bolt is correctly installed.

Parking Brake and Actuation - P
arking Brake Control
Re
mo
val and Installation
Remov
a
l
W
A
RNING: BRAKE DUST, IF INHALED CAN DAMAGE YOUR
HEALTH. ALWAYS REMOVE BRAKE DUST USING A VACUUM
BRUSH. DO NOT USE A COMPRESSED-AIR LINE TO DISPERSE BRAKE DUST INTO THE ATMOSPHERE.
CAUTION: Replacement of nuts and bolts: Various thread-locking devices are used on nuts and bolts throughout the
vehicle. These devices restrict the number of times a nut or bolt can be used. See section 100-00 for information.
1. Position vehi cl
e on a four-post lift.
2. Release parking brake.

3. Releas
e tension on parking brake cable.
Slacken bu

t do not remove adjustment nut.

4. Releas
e parking brake cable.
Remo

ve clip.
Re
mo
ve clevis pin.
5. Remove driver seat for access . Refer to operation 76.70.01.
6. Remove trim from hand lever. Refer to operation 76.13.63.
7. Carefully reposition carpet from around hand lever for access.

8. Disconnect park ing-br
ake, warning-light switch connector.
9. Remove hand lever from vehicle.

I
nstallation

Re
move bolts.
R

emove lever.

10
.
Remove gasket.

11
.
Remove warning-light switch from lever.
R
emove screws.
Re

move switch.

1. Inst
all warning-light switch to hand lever.
Install and tigh

ten
screws to 3 Nm.
2. Install gasket to handbrake lever.

2
. Align return spring.
3. Install pivot pins.
4. Install retaining wire: bend ends of wire to secure
pivot pins.

3. Inst
all brake warning-light switch.
Inst

all switch onto locating tag.
Install and tigh

ten nut and bolt to 3Nm.
4. Install brake booster and master cylinder assembly. Refer to
operation 70.50.18.
5. Install pedal housing, brake booster and master cylinder
assembly. Refer to operation 70.35.39.
6. Bleed brake system. Refer to operation 70.25.03.
7. Install engine compartment rear cover. Refer to operation
76.11.35.
8. Connect battery ground cable. (IMPORTANT, see 86.15.19 for
further information).

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