1994 JAGUAR XJ6 change time

A master index of numbered operations has bee? compiled for universal application to all vehicles manufactured by
Jaguar Cars Ltd.
Each operation described in this manual is allocated
a numberfromthe master indexand cross-refers with an identical
number in the Service Repair Operation Times Manual. The number consists of six digits arranged in three pairs.
Each operation is described in the sequence necessary to complete the operation in the minimum time, as specified
in the Manual of Repair Operation Times.
SERVICE TOOLS
Where non-standard service tools (i.e. tools which are not generally available hand tools) are required to complete an
operation, the number and an illustration of that tool is given in the preliminary pages of the Section concerned.
TORQUE TIGHTENING SPEClFKATlONS
Torque tightening specifications are given in tabular form in the preliminary pages of the relevant Section.
REPAIRS AND REPLACEMENTS
When service parts are required, it is essential that only genuine Jaguar / Daimler replacements are used.
Attention is drawn to the following points concerning repairs and the fitting of replacement parts and accessories:
0 Safety features embodied in the vehicle may be impaired if other than genuine parts are fitted. In certain
territories, legislation prohibits the fitting of parts which are not produced to the vehicle manufacturer's
specification.
0 Torque wrench setting figures given in this Manual must be strictly adhered to.
0 Locking devices, where specified, must be fitted. If the efficiency of a locking device is impaired during removal it must be renewed.
0 Owners purchasing accessories while travelling abroad should ensure that the accessory and its fitted location
on the vehicle conforms to mandatory requirements existing in their country of origin.
0 The vehicle warranty may be invalidated by the fitting of other than genuine Jaguar / Daimler parts. All Jaguar
/Daimler replacements have the full backing of the factory warranty.
0 Jaguar / Daimler dealers are obliged to supply only genuine service parts.
REFERENCES
References to the left or right-hand side of the vehicle are made as if viewing from the driver's seat.
SPECIFICATION
Purchasers are advised that the specification details set out in this Manual apply to a range of vehicles and not to any
specific one. For the specification of a particular vehicle, purchasers should consult their dealer.
The Manufacturers reserve the right to vary their specifications, with or without notice, and
at such times and in such
manner as they thinkfit. Major as well as minorchanges may be involved in accordance with the Manufacturer's policy
of continuous improvement.
Whilst every effort is made to ensure the accuracy
ofthe particulars contained in this Manual, neither the Manufacturer
nor the Dealer, by whom this Manual is supplied, shall in any circumstances be held liable for any inaccuracy or the
consequences thereof.
COPYRIGHT
Copyright.@ Jaguar Cars Lid. 1994
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any
form, electronic, mechanical, photocopying, recording or other means, without prior written permission of Jaguar
Cars Ltd., Service Department, Browns Lane, Coventry,
CV5 9DR, England.
X300 VSM Issue 1 August 1994 2

Introduction c
GLOSSARY OF TERMS
Term(s) Abbreviation Definition Previously used (if applicable) term(s) (or Eng- lish Equivalent)
0
EGRT Sensor
EGR Vacuum Regulator
1 Read-only memory
I Electronic Engine Control
kronic Secondary Air Injection
Engine Control Module
Engine Coolant Level
ECT Sensor
Engine Speed
Engine Speed Sensor
1 Evaporative Emission Control
Va Ive
Exhaust Gas Recirculation
Solenoid Vacuum Valve
Exhaust Gas Recirculation
Temperature Sensor
Exhaust Gas Recirculation Valve
Extreme Pressure EGR
EGRT EVR
EVP
EDM
EEPROM EPROM EEC
EAlR
ECM ECL
ECT
ECTS
RPM
EPA
EVAP
EVAPP EGRS
EGRT Sensor
EGRV EP System
which reduces
NOx emissions by
adding exhaust gases to the incoming
fuel/air charae
Sensing EGR function based on temperature
change.
controls EGR flow by changing vacuum to
the EGR valve
an EGR system that directly monitors EGR
valve position to control EGR flow
Manual which deals with the diagnosis of
electrical faults (see also Vehicle Service
Manual and Unit Service Manual)
a system that provides electronic control of
enaine electronics
a pump
-driven system for providing
secondarv air usina an electric air Dump
thermistor which provides engine coolant
temperature signal to the PCME to trigger
enrichment circuits which increase injector
'on' time for cold start and warm-up
sensor fitted on flywheel of
VI2 engine;
provides engine speed information
system designed to prevent fuel vapor from
escaping into the atmosphere. Typically
includes a charcoal filled canister to absorb
fuel
vaoor
additives to drive axle lubricants. Designed
to protect the spiral bevel gears from wear
induced by their
slidingholling action EGR
EEPROM,
EPPROM
EPROM ECU
engine coolant level indicator
Coolant temp.
sensor, ECT
revlmin. RPM
purge valve
EGR solenoid
valve
EGR temperature
sensor
X300 VSM issue 1 August 1994 13

0
Term(s) Abbreviation Definition
(if applicable)
Introduction i
Previously used term(s) (or Eng-
GLOSSARY OF TERMS
I lish Equivalent) A 3
Scan Tool
Seat Control Module
Secondary Air
Secondary Air Injection
Secondary Air Injection Bypass
..
Secondary Air -Injection Check
Valve
Secondary Air Injection
Diverter
Secondary Air Injection Magnetic
Clutch
Secondary Air Injection Pump
Secondary Air Injection Relay
Secondary Air Injection Switching
Valve
Security
& Locking Control Mod- ule
sedan
Sensor
Service Bulletin
Service Manual
Service Manual Preliminary
In-
formation Bulletin
Service Repair Operation
(number)
ST
SCM
AIR
AlRB
AI RC
AlRD
AIRPC
AlRP
AlRR
AIRS
SLCM
-
S
SE
SM
SMPlB
SRO
device that interfaces with and
communicates information on a data link
module controlling the seat motor systems
(not electric
raisejower-only seats)
air provided
to the exhaust system
system used for a period of time each time
the engine is started, unless certain
temperature criteria are met. Pumps air
directly into the exhaust system which
generates extra heat and reduces the time
taken for the catalytic converters to reach
operating temperature
vents secondary air to atmosphere
valve which prevents back
-flow of exhaust
gas to the AIR system when the system is
inoDerative
diverts secondary air to either the catalyst or
exhaust manifold
clutch mounted on the AlRP drive shaft
mechanically driven rotary vane
pump,
driven through the AIRPC
controls the injection of air into the exhaust
system
vacuum operated valve backing
-up the AlRC
module controlling the vehicle‘s security and
closure
-locking functions
passenger car having two or four doors, and
front and rear
seatsfor driver and passengers
generic name for a device that senses either
the absolute value or a change
in a physical
quantity such as temperature, pressure or
flow rate, and converts that change into an
electrical auantitv sianal
__
form of Service Bulletin specifically designed
to enable the rapid issue of temporary pages
for inclusion in the Service Manual
Number
generated by Jaguar Methods &
Techniques system which relates to the time
allowed to complete a repair operation.
Further information on the system can be
found
in the separate Jaguar Publications
(for each model range) entitled ‘Repair
Operat ion Times’. AIP,
AI,
Thermac, air injection sys-
tem
NRV, non-return
valve
air
pump clutch
AIP, air
pump
air injection relay
air switching
valve
saloon
Issue 1 August 1994 23 X300 VSM

10.2 SERVICE
PROCEDURES - SAFETY RELATED
10.2.1
Airbag
The electrically activated driver's side airbag is attached to the steering wheel hub and is fed by two wires from the
column stalk assembly. Electrical input to the column stalk assembly for the airbag is provided by a dedicated harness
which is encased in a yellow sleeve. A mechanism in the stalk assembly called the 'cable reel cassette' provides conti
-
nuity from the static column to the steering wheel. The 'cable reel cassette' is driven by a tang which locates in the
steering wheel. Because the connection is by wires, and the cassette assembly is only capable of approximately five
(5) full turns,
it is critically important that initial positioning is correct, see Section 15. It is equally important that fitting of the steering wheel, connection of the column, lower shaft and steering rackshould
ONLY be made with the steering rack in the center of its travel.
WARNING: DO NOT REMOVE THE STEERING COLUMN FROM THE VEHICLE WITH THE STEERING WHEEL AT- TACHED UNLESS THE STEERING IS CENTERED AND THE COLUMN LOCK IS ENGAGED. IF THE LOCK
BARREL
IS TO BE RENEWED, 'LOCK-WIRE THE ASSEMBLY TO PREVENT ROTATION. FAILURE TO OB- SERVE THIS AND CONSEQUENT DAMAGE TO THE 'CABLE REEL CASSETTE MAY RESULT IN AN INOP- ERATIVE AIRBAG SYSTEM. SEE LABEL ON STEERING WHEEL HUB.
10.3 SERVICE PROCEDURES
10.3.1 Working Practices
It is not recommended that either the steering rack or engine driven pump assemblies are repaired in any way other
than in accordance with the repair procedures described in this manual. The fluid reservoir and filter is a disposable
assembly and no attempt should be made to clean it internally. Genuine replacement units must be fitted following
routine service or diagnostic confirmation of the failure of any component.
The importance of cleanliness cannot be over
-stressed, not only with new parts but also those which may havefailed.
In-service contamination of the hydraulic system is a major cause of failures and may be avoided with good working
practices and care. All new units and pipes must be supplied with suitable blanks in every orifice. Should a unit not
have blanks fitted, do not use
it - return it to the supplier with an appropriate reason for your action.
To help the manufacturer diagnose problems and avoid post-removal contamination; provide full details of the fault
and plug all connections as soon as they are released. All suspect units must be returned to Jaguar Cars complete
with relevant documentation.
CAUTION: It is imperative that the power steering system does not become contaminated in any way. Always de- cant fluid from afresh sealed container and clean the area around the reservoir neck both before and after topping-up. Never return drained fluid to the system.
10.3.2
Position the vehicle on a level surface with the engine sta- tionary and fluid cold. Add fluid, if required, so that the level
falls BETWEEN the marks
Fig.1.
10.3.3 System Bleed (following maintenance)
To avoid fluid aeration and possible pump damage, the in- itial fill process must be carried out with the ignition OFF.
Set the fluid level approximately 20 mm above the upper
dipstick level, and cycle the steering no less than three (3) times from lock to lock (this may be best achieved with the
front wheels off the ground). As air is expelled thefluid level
will fall, the level should be corrected. Start the engine and
further cycle thesteering until the fluid level becomes stable.
Stop the engine and finally set the level in accordance
with the fluid level check procedure.
10.3.4 Fluid Reservoir
The reservoir has an integral, non-serviceable, return-side
filter. Should any component be renewed or the system
'broken into' for any reason,
it is essential that the reservoir and the fluid are changed. Under normal operating condi- tions it is not necessary to change the fluid.
10.3.5 Hydraulic Connections
Fluid
Level Check and
Top-up
Jf7-281
Fig. 1
All hydraulic connections and surrounding areas should be scrupulously cleaned before and after work. Please note
that the steering rack valve block connections for FEED and RETURN are common in size. Ensure that the pipes are
correctly fitted, the uppermost one being the high pressure FEEDfrom the steering pump and the lower (RETURN) hav- ing a double depth hexagon tube nut.
X300 VSM 5 issue 1 August 1994

may include:
0
0
Loose or worn wheel bearings.
Loose or worn suspensions or steering components.
0 Worn or damaged drive shaft slip yoke joint.
0 Front disc rotor runout.
o Loose engine or transmission supports.
0 Driveline alignment.
0 Engine driven accessories.
Suspension Systems
11.4 DIAGNOSIS AND TESTING
' 11.4.1 Tire Wear
Tires should be inspected as abnormal or excessive wear may becaused by incorrect wheel alignment, wheelbire im- balance, or incorrect tire pressure.
1 1.4.2 vibration and Roughness
Vibration, roughness, and shimmy conditions may be caused by excessive tire or wheel runout, worn or cupped tires,
or wheel and tire unbalance.
Most of these conditions are due to irregularities in the road surface, hence driving the vehicle on different types of
road surface will often indicate the cause of the condition.
Do not automatically suspect the tires when attempting to diagnose a vibration concern as other sources of vibration
Before investigating any other vibration concerns,
a roaG &est and a customer inter\,.dw (if possible) should be carried
out. This can provide much of the information needed to find the source of vibration.
Drive the vehicle on a road that is preferably smooth and free of undulation and
if vibration is apparent note, the speed at which thevibration occurs, whattype of vibration occurs in each speed range (mechanical or audible), howthevibra- tion is affected by changes in vehicle speed , engine speed and engine torque, and the type of vibration sensitivity
(torque sensitive, vehicle speed sensitive, or speed sensitive).
Some of the condition terms used when describing sources of vibration are explained as follows:
0 Torque Sensitive
This condition can be improved or worsened by accelerating, decelerating, coasting, maintaining
a steady
vehicle speed and application of engine torque.
0 Vehicle Speed Sensitive
This means that the vibration always occurs at the same vehicle speed and is not affected by engine torque,
engine rpm, or transmission gear selection.
B
0 Engine Speed Sensitive
This means that the vibration occurs
at varying vehicle speeds when a different transmission gear is selected.
It can sometimes be isolated by increasing or decreasing engine speed with the transmission in 'NEUTRAL', or
by stall testing with the engine in gear. If the condition is enginesensitive, the condition is not related to tires.
If the road tests indicates that the vibration is related to the tires or wheels,use a 'lire Wear Diagnosis Chart' to
investigate the cause of concern. Should the road test indicate that there is tire whine, but noshake or vibration,
the noise originates from the contact between the tire and the road surface.
X300 VSM 3 Issue 1 August 1994

Climate Control Systems
14.3 CLIMATECONTROL PANEL
12 13 14 15 16
Fig. 1 Control layout (see key listing below)
The following description of the various control panel functions is provided as a brief over
-view to assist in function
checking. Further information concerning the control panel to component interface may be found in the fault finding
procedures (this section) or the Electronic Diagnostic Manual (EDM).
Iynfe: The system may be activated by any one of four commands. a) AUTO button item 1 1; b) DEFROST button item 12; c) NC button item 10; d) OFF switch item 1.
1. Combined push for OFF and rotary FAN SPEED control. The speed of the two fans is changed by clockwise (to
increase) or anti-clockwise rotation of the knob. Operation of the control, (push) OFF or (rotate) FAN over-rides
the AUTO selection and cancels the 'AUTO' display.
2. RECIRCULATE AIR push-on / push-off button and state lamp, used to prevent outside air being drawn into the
cabin. There are two modes:
a) Press and immediate release; provides timed recirculation of five
(5) minutes. b) Press and hold for two (2) seconds; 'latches' the mode until operator over-ride.
3. Temperature scale SELECTOR for Celsius or Fahrenheit.
4. FANS SPEED display bar graph.
5. TEMPERATURE numeric display for demand and exterior.
6. Selected temperature SCALE temperature numeric display.
7. EXTERIOR temperature option display.
Issue 1 August 1994 4 X300 VSM

IT Electrical
15.2.8 Odometer
With the ignition 'OFF' the odometer is permanently dis-
played but not illuminated. With the ignition 'ON' the odo- meter is displayed and also illuminated.
Trip information or driver information messages may be dis
-
played instead of the 'ODO'. By pressing the 'ODO' button
once or twice the trip and driver information messages can
be deleted and the
'ODO rdisplayed.
W. The odometer value is not stored within the LCD
module.
15.2.9 Trip Computev
This provides information on the vehicle's speed, fuel usage
and distance traveled
all of which are calculated by a micro
processor.
The controls, part of the fascia switch assembly, are located
on the right
-hand side pod positioned to the right-hand side
of the steering column.
I
/
J86-192L
Fig. 1
15.2.10 Driver Information Messages
Two fault messages, FLUID - AIRBAG are displayed via the LCD in conjunction with relevant warning lamps.
If an
airbag fault exists or the brake fluid is low, a message will automatically be displayed on the LCD and the relevant
warning lights illuminated. Should both faults exist at the same time, each message is displayed alternatively for ap
- proximately 2 seconds.
Messages may becancelled
by pressing the 'ODO button which allowsthe LCD to return to its last displayed message.
The warning lamps will not be extinguished. If the fault is not repaired the message(s) and the warning lamp(s) will
be redisplayed when the ignition is switched on.
15.2.11 /llumination
Warning indicator lamp illumination is controlled by a microprocessor located inside the instrument panel.
The seven right
-hand warning indicators are primary warning lamps illuminating 'RED and the seven left-hand warn-
ing indicators are secondary warning lamps illuminating 'AMBER'
The eight lower lamps are
a mixture of status and warning lamps.
With the ignition
'OFF' the LCD is not illuminated.
With ignition
'ON' and side lights 'OFF' the LCD is illuminated at maximum brightness.
With the ignition on and side lights
'OFF' the LCD is dimmed as are the gauges.
The long
life type bulbs are enclosed by orange and brown coloured bulb holders which must never be interchanged.
Replacement bulbs must always be of the same colour.
CAUTIQN: Always dwonnect the battery ground lead before commencing with any instrument rsimwal procedure.
15.2.12 General Repair Notes
0 After lens removal do not rest instrument panel face down as this causes damage to the delicate gauge needles.
Avoid scratching the gauge faces and ensure cleanliness when handling the panel.
0 To minimize the risk of damage and contamination to the instrument panel, all repairs must be carried out in a non - static and dust -free environment. Avoid touching connector pins and pcb components to minimize
risk of static damage.
0 The instrument panel has two different types of bulb holders each of which must be located correctly when
changing the bulbs.
Issue 1 August 1994 10 X300 VSM