1994 JAGUAR XJ6 service

XJ6 - XJI 2
Vehicle Service Manual
Published by Produd Development & Publications Jaguar Cars Limited
Publication Part Number - JJM 10 04 12 / 50

Introduction
FOREWORD
This Vehicle Service Manual (VSM) is Dart
-
of a
set of service literature which covers -. diagnosis and rectification of problems associated with all areas of the X300 family of vehicles.
It is designed to be read in conjunction with other manuals, namely the various Unit Service Manuals (USM) (as
applicable to the particular vehicle under diagnosis/ repair) and the X300 Electrical Diagnostic Manual (EDM); see list
below.
It should be noted that its scope is limited to those areas that are unique to the family, e.g. Remove & Refit procedures
for Body Components, Engine, Transmission etcetera, Fuel, Emissions & Engine Management systems, and so on.
Fault Diagnosis and repair procedures (together
with Technical Data, Recommended Lubricants, Capacities etcetera) for major assemblies such as engines, automatic and manual transmissions, are covered in the separate Unit Service
Manuals.
The Unit Service Manuals are notvehicle
-specific, but are designed to be read in conjunction with this VSM, and, where so equipped, with other Jaguar Vehicle Service Manuals for new models launched subsequent to the X300 family.
The X300 Electrical Diagnostic Manual is the final part of the 'set' of service documentation. This manual
is
family-specific, and is designed to aid theTechnician to isolate electrical faults and to correct them. It covers all aspects
of electrical fault diagnosis, including:
OBD
II Codes and emission control system related fault diagnosis / rectification.
Circuit Diagrams
Component (Relays, fuse boxes, control modules etcetera) Location
/ Harness Diagrams I Ground Locations
Connector Locations.
Service Manuals Required
The Manuals required to service the X300 family of vehicles are as follows:
X300 Vehicle Service Manual
X300 Electrical Diagnostic Manual
Unit Service Manuals:
AJ16 Engine Service Manual
VI2 Engine Service Manual ZF AutomaticTransmissions Service Manual (ZF supplies transmissions for 3.2 liter and 4.0 liter normally aspirated
versions) Powertrain Automatic Transmissions Service Manual (The Powertrain name succeeds that of Hydra
-Matic.
Powertrain are suppliers of the 4L 80 E transmission as fitted to 4.0 litre supercharged and 6.0 litre versions)
Each
of the X3Okpecific manuals is divided into Sections which adopt the same title and number where relevant, i.e. Section 5.1 of both the VSM and the EDM cover Fuel, Emission Control & Engine Management System (AJ16). An
over
-all contents list showing each section title and number together with its page-edge locator is given in this section
and in the introduction to the EDM.
The VSM (not applicable to the EDM) also contains Appendices which cover specialized areas such as the current
vehicle specification, routine maintenance schedule etc. These are carried at the rear of this Manual, and have their
own contents page within this section.
INDEX
rapid location of information. The entries are set out as per the following example: @ This manual carries a comprehensive index at the rear, which is designed to save the Technician time by permitting
CLIMATE CONTROL SYSTEMS. Section 14.
See also Electrical Diagnostic Manual
Clutch
Description: Sect. 7.7 - 10
Fault diagnosis: Sect 7.1 - 11
In the example the heading in upper case lettering is to a section title, and it refers to the section number, 14, and also to the EDM as electrical diagnostic information will be found in that manual's section 14. The entry for clutch tells us that the relevant description will be found on page 10 of Section 7.1 of this manual, and
that fault diagnosis procedures start on page 11. In this case there is no reference to the EDM as electrical diagnosis does not apply to this area.
GLOSSARY OF TERMS
This Section contains a Glossary of general and emissions-related terminology (commencing on page 5).
X300 VSM 1 Issue 1 August 1994

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

(if applicable) term(s) (or Eng- lish Equivalent)
I R
Radio Data System
Random Access Memory
I rear wheel drive
relay
relay module
reservoir
return
revolutions per minute
right
-hand
right
-hand drive vehicle
I rocker panel
I roof lining
RDS
RAM
ROM RWD
RM
RES
RTN
RPM
RH
RHD
local traffic information service which
automatically breaks
in to whichever station
is being received. Also programmable to
lock onto the strongest available frequency
for a given nationally available radio station,
regardless ofthe geographical location of the
receiver
fast access memory store which is accessible
for entry or extraction of data
fast access memory
in which data is fixed and
mav not be entered or extracted
an (usually) electro
-mechanical device in which connections in one circuit are opened
or closed by changes
in another circuit
a module containing two or more relays
container, usually for oils, coolants or
hydraulic fluids
a dedicated sensor ground circuit
shaft
-speed of a device, usually an engine or
motor
I
X300 VSM Issue 1 August 1994 22

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

GLOSSARY Of
Term(s) Abbreviation Definition Previously used (if applicable) term(s) (or Eng- lish Eauivalent)
U
undercoating
unitized construction
Unit Service Manual
V
valve
valve lifter
vapor Vehicle Condition Monitor
Vehicle Emission Control
Information Label
Vehicle Service Manual
Vehicle Speed Sensor
Vehicle Identification Number
Viscositv Index
volatile
Voltage Regulator VCM
VECl Label
VSM
vss
VI N
VI
VR Service
Manual which pertains
to a major
'unit' (e.g. transmission, engine) fitted to a
Jaguar vehicle (see also Vehicle Service
Manual and Electrical Diagnostic Manual)
a device
by which the flow of liquid, gas,
vacuum or loose materials may be started,
stopped or regulated by a movable part
which opens, shuts or partially obstructs one
or more passageways or ports.
A 'Valve' is
also the movable part of such a device
in an OHC engine, the plunger fitted between
valve stem and cam lobe
instrument panel display which warns of
faults
Service Manual which pertains to a specific
family of Jaguar vehicles (see
also Unit
Service Manual and Electrical Diagnostic
Manual).
sensor which provides vehicle speed
information
number assigned to the vehicle
by the
manufacturer, primarily
for licensing and
identification purposes
(1) vaporizing at room temperature (liquid) (2) not permanent (memory)
device which regulates the variable output
voltaae of a aenerator underseal
unitary
construc
-
tion
tappet, bucket
vapour
road speed sen
- sor
Issue 1 August 1994 27 X300 VSM

0 2.1 JACKING AND LIFTING
2.1.1. Safety Precautions
The following safety precautions must be observed when
raising the vehicle to perform service operations:
0 Whenever possible use a ramp or a pit in preference
to a jack, when working beneath a vehicle.
0 Never rely on a jack to support a vehicle; use axle
stands or blocks under the vehicle jacking points to
provide rigid support.
0 When working beneath a vehicle, chock the wheels in
addition to applying the handbrake.
0 Ensure that the vehicle is standing on firm, level
ground before using the jack
0 Check that any lifting equipment used has adequate
capacity for the load being lifted and is in full working
order.
2.1.2 Jacking Points
The jack provided in the vehicle toolkit engages with jacking
points situated below the body side members, in front of the
rear wheels (Fig.
1) and behind the front wheels (Fig. 2).
Fig. 1
Fig. 2
Fig. 3
2.1.3 WheeLFree L i#t
Use of a wheel-free lift is recommended for maintenance operations. Support the vehicle using lifting pads at the four
jacking points (Fig. 3).
issue 1 August 1994 X300 VSM 1