1994 JAGUAR XJ6 ABS

GLOSSARY OF TERMS
Introduction
This glossary of terms is intended to cover both general and emissions-related (to SAE J 1930) terminology. It is in- tended to enable the user to ascertain the meaning of standardized terms and acronyms used throughout the Manual.
The required term may be looked-up in the left-hand column, and subsequent columns give the standard abbreviation
or acronym, definitions and previously used terms, as applicable.
As this Manual is a world
-wide publication, and must comply with certain Society of Automotive Engineers Standards, it has been necessary to adopt the terminology etc. demanded by that Standard.
Term(s) Abbreviation Definition Previously used
(if applicable) term(s) (or Eng- lish Eauivalent)
A
throttle pedal
accelerator Dedal AP
AI= measurement across the spanner flats of a
across flats
nut or bolt head
adaptor
AC.
aircon
adapter
after bottom dead center
after
too dead center event
occurring after BDC
event occurring after TDC
ABDC
ATDC ACL
AIC
ACS
Air
Cleaner
Air Conditioning
Air Conditioning Signal air conditioning
compressor clutch
operation is signalled to the PCM which
induces idle speed corrections to
compensate for engine load changes
module controlling air conditioning, heating
and ventilation
wing or similar, designed to obtain some
effect from the flow of air over
it
electrical current whose flow alternates in
direction, in a sinusoidal waveform
NCCM Air Conditioning Control Module
airfoil aerofoil
alternating current ac
aluminium
aluminum
Ambient temperature Temperature
of the air surrounding an object
SI unit of current AmDere A Amp Amp. hour -~ 1 Ampere flowing for one hour
system, usually ele&o&ally controlled (but ~- __. .. . Ampere hour
Anti
-Lock Braking System Ah
ABS can be mechanically) which prevents wheel
lock
-up under braking by sensing lack of
rotation of a wheel(s) and diverting fluid
pressure away from
it (them). Originally Anti-Blockier System (Bosch).
ABS control module
ABS
/ traction control control
module ABS
CM
ABS I TC CM
aerial
antenna (plural, antennae or
antennas)
analog
Analoa Volt-Ohm meter analogue
AVOM unit of pressure
(1.01325 bar)
atmospheres
automatic transmission atm
auto,
auto gearbox
drive shaft
axle shaft shaft
transmitting power to the rear wheel
hubs
.-
Issue 1 August 1994 X300 VSM 7

Terrn(s1 Abbreviation Definition Previously used (if applicable) term(s) (or Eng- lish Eauivalentl
5
Babbitt metal
backlight
back
-up lamp
balk ring
t
battery positive Voltage B+
Barometric Absolute Pressure BARO
Sensor
base Idle
base timing
battery
before bottom dead center BBDC
before top dead center BTDC
blower BLR
Body Processor Module BPM
British Standards BS
I British Standards Automotive BSAu
brake horsepower
brake mean effective pressure BMEP
brake
ontoff BOO
brake rotor
I bottom dead center BDC
bypass air BPA
bumper guard
I
bushing I
rotating component of manual transmission
which prevents premature engagement of
gears
The positive Voltage from
a battery or any
circuit connected directly to it.
sensor measuring the pressure of
surrounding air at any given temperature
and altitude
Idle
rpm determined by the throttle lever
being hard
-set on the throttle body with the
IAC solenoid disconnected
Spark advance in degrees before top dead
center of the base engine without any control
from the PCM
Electrical storage device producing DC
Voltage by means of electrochemical
reaction
event occurring before BDC
event (usually ignition) occurring before TDC
Device which supplies a current of air at
moderate pressure, e.g. heater or
AJC blower
Control module for body electrical systems,
e.g. interior lamps, windshield wash wipe
control etc..
standard specification issued by the British
Standards Institution
effective horsepower developed by an
engine or motor, as measured by a brake
applied to its output shaft
that part of the effective pressure developed
in a cylinder that would result in a cylinder
output equal to the bhp of the engine
indicates the position of the brake pedal
process of bedding
-in the internal working
surfaces of e.g. an engine by avoiding excess
build
-up of heat
lowest point of piston travel in a
reciprocating engine
mechanical control of throttle bypass air
cylindrical plain bearing white
metal
backlight,
rear screen reversing lamp
baulk ring
B+,
+ve, VSS
BARO, APS
CCM (Central
Control Module).
CPU
brake disc
running
-in
overrider bush
Issue 1 August 1994 8 X300 VSM

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

- .. I lish Equivalent)
M
Malfunction Indicator Lamp MIL
Manifold Absolute Pressure MAP
Manifold Absolute Pressure Sen
- MAPS
sor
Manifold Surface Temperature MST
manual transmission,
M/T transmission
Mass Air Flow MAF
Mass Air Flow Sensor MAFS
maximum max.
metal inert gas MIG ~
meters (measurement) m
metric
(screw thread, e.g. M8) M
MFD I Microfarad
millimeters mm
millimeters
of mercury mmHg
minimum min.
minute minute
Model Year MY
Module
M
mold
Motorized In
-Car Aspirator MIA
muffler
multiport fuel injection MFI a required
on
-board indicator to alert the
driver of an emission related malfunction
absolute pressure of the intake manifold air
sensor located in the PCM and ported to the
intake manifold
transmission which is manually, externally
controlled
system which provides information on the
mass flow rate of the intake air to the engine
hot
-wire sensor which monitors air flow into
the intake manifold for fueling and ignition
control
electric welding system in which a stream of
inert gas
shielbs~the electrode, preventing
oxidation
unit of electrical capacitance, one millionth of
a farad
self contained group of electrical/electronic
components which is designed as a single
replaceable unit
device which constantly samples cabin
temperature by passing air over a sensor,
and communicates with the
NCCM to modify
NC system performance to suit
device which causes exhaust gas flow to
expand and thereby reduce its pressure and
hence its noise fuelling failure
gearbox
air flow meter
metres
min.
mould
motorized aspi
-
rator
silencer ~~
X300 VSM 19 Issue 1 August 1994

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

i Introduction
GLOSSARY OF TERMS
0 [if applicable)
ss
Term(s) term(s) (or Eng-
lish Equivalent)
part of the shift mechanism of a manual selectorfork
transmission, mounted on the shift rail, and
relaying movement in the shift lever to the
sleeve coupling which moves gears in and
out of engagement
rail which carries the shift fork
controls shifting in an automatic
transmission
part engine, usually the cylinder block, short engine
crankshaft
I connecting rod I piston
assemblv. suDDlied as a reconditioned unit selector
rod
shift
fork
an undesirable connection between a
(usually electrical) circuit and any other point
in
-line engine which is mounted in the
vehicle at an angle from the perpendicular, as
AJ6
shift rail
shift
solenoid
inclined engine
short
block
SRCM
SIG RTN
short circuit
sun roof
sun roof control
module
slant engine
buffer block, usually of a rubber compound,
which fits between the axle and the body unit,
and absorbs any excess travel
device consisting of an electrical coil which,
when energized, produces a magnetic field
in
a plunger which is pulled to a central
position. A solenoid may be used as an
actuator
in a valve or switch
SAE
sliding roof
sliding roof control module
ci rcl
ip
bump stop
signal return
sc
snap ring
ing brake
brake lamp
sulphur,
-ic
an intake system which utilizes a
snubber
SCB
SRS
Society of Automotive Engineers
solenoid
supercharger (mechanically driven device
that pressurizes intake air, thereby increasing
density of charge air and the consequent
power output from a given displacement)
airbag restraint system for driver and front
splash
guard
speed
Speed Control Control Module
square centimeters
stabilizer bar
standard
station wagon
stop lamp
sulfur, sulfuric
supercharger
- - __. . . . ... - . Supercharger Bypass
Supplementary Restraint System Abbreviation
I Definition 1 Previously used
I mud flap
I the
magnitude of velocity (regardless of I I direction)
SCCM
I Module controlling Speed Control System I Cruise Control
cm2
std
1 seat passenger
SP I supply port of valve I
0
0
0
Issue 1 August 1994 24 X300 VSM

-5 Driveshafts & Final Drive
0
Fixing
11. TORQUE TIGHTENING SPECIFICATIONS
Tightening Torque
(Nm)
'A' frame to differential 85 - 115
'A' frame to wide mountina bracket 72 - 98
ABS sensor to hub carrier
Axle shaft hub nut
* See repair operations 47.10.01 and 64.15.14 & 15 this don
8- 10
304 - 336 *
Axle shaft to output flange
Bush,
'A' frame lower mounting to body
81 -99
80
- 100
Centre drive shaft bearing to crossmember 19 - 27
Crossmember to bodv 19 - 27
Differential nose to wide mounting bracket - 34 - 46
Issue 1 August 1994 iv X300 VSM
Differential strut to bodv 85 - 95
Drive shaft to auto-gearbox flange
Drive shaft flexible coupling to pinion flange 33 - 45
71
-83
Exhaust joint 'Olive'
Exhaust joint 'Torca clamp' -. 14-18
60
- 80
Exhaust mounting to wide mounting bracket
Final drive unit to wide mounting bracket at differential 'nose'
Hub carrier fulcrum 22-88
34
- 46
80
- 100 ___
Lower shock absorber bolt
Mounting bracket
('A' frame) to body (inner)
Mountina bracket
('A' frame) to bodv (outer)
- 80- 100
40 - 50
80 - 100
Oil drain plug __ 26 - 34
Oil filler DIU~ 20 - 26
Output shaft housing to differential case
Pendulum assembly to differential
Pinion drive flange nut
* See repair operation 5120.01 this section
Road wheel -Alloy
Road wheel - Steel
Upper link to differential
Rear
mounting bracket to differential
52 - 58
160
- 200
Minimum 135 *
85 - 105
88 - 102
68
-82
72
- 98 ~~~~~
Upper
link to wide mounting bracket & 'A' frame
Wide mounting bracket to
'A' frame
85-115
85
-115
Wishbone pivot nut
Wishbone tie to differential stud 80 - 100
85 - 105

Driveshafts & Final Drive
9.8 FINAL DRWE UNIT RENEW
SRO 51.25.13
. Disconnect vehicle battery ground lead.
. Support the vehicle at the rear and remove the rear road
wheels.
Disconnect brake pad wear sensor multi-plug at RH hub
carrier and remove tie straps from wishbone. Release
ABS speed sensors at
RH and LH hub carriers and remove
tie straps from wishbones.
. Remove rear brake calipers, see Section 12, and support
at bump stop. Disconnect main handbrake cable at com- pensator, short cables at joining piece and remove com- pensator.
. Remove fixings, FLEXIBLE coupling to differential DRIVE FLANGE.
CAUTIW: Under no circumstances must the flexible
coupling (or itsfixings) be loosened or removed
from the drive shaft flange.
. Remove fixings center bearing to crossmember (1 Fig. 1) and push drive shaft rear section forward to disengage
from pinion spigot. Fig. 1
w: Take account of any shims located between the center bearing and the crossmember.
. Release fixings and remove, over axle exhaust pipe mounting from wide mounting bracket.
. Support the rear suspension assembly from below and remove fixings from RH and LH sides in the following order:
1. Shock absorber to body upper fixings.
2. Differential strut to body (1 Fig. 2).
3. 'A' frame bush (2 Fig. 2).
4. Lower mounting bracket assembly to body (3 Fig. 2).
. Carefully lower the unit clear of the vehicle and place in a safe working location.
. Release handbrake cable to wide mounting bracket clips.
. Disconnect RH and LH axle shafts from differential couplings, note camber shim and discard fixings.
. Remove wishbone pivot bolt, washers and remove wisbone / hub / axle shaft assembly RH and LH.
issue 1 August 1994 6 X300 VSM