1998 JAGUAR X308 Passenger air bag

            501‐20B : Supp l
emental
 Restraint  System  
                 Specification  
                 Description  and  Operation  
                     Air Bag  Supplemental  Restraint System  (SRS)  
                 Removal and  Installation  
                     Air Bag  Control  Module (76.73.41)  
                     Driver Air  Bag  Module  (76.73.39)  
                     Passenger Air  Bag  Module  (76.73.37)  
                     Side Air  Bag  Module  (76.73.47)  
                     Side Impact  Sensor  (76.73.53)  
 
             501‐25:  Body  Repairs ‐  Genera
l  Information  
                 Description  and  Operation  
                     Body Repairs  
 
        502:  Frame  and Mounting  
 
             502‐00:  Uni ‐Body,  Subframe  and  Mounting  System  
                 Removal and  Installation  
                     Front Axle  Crossmember  
                     Front Axle  Crossmember  Front  Bushing  (60.35.24)  
                     Front Axle  Crossmember  Front  Bushing  Heat  Shield  (60.35.37)  
                     Front Axle  Crossmember  Rear  Bushing  (
60.35.26)  
                     Rear Axle  Crossmember  (64.25.16)  
                     Rear Axle  Crossmember  Bushing  (64.25.02)  
 

General Information - Terminology Glossary

Description an
d Operation

This glossary of terms is intended to cover emissions-related (to SAE J 1930) term inology, and other abbreviations that may
be used in this manual.
The required term may be looked-up in th e left-hand column, and subsequent columns give the standard acronym, unit or
abbreviation, and definition.
Te rm
(s)
Acr
ony
m /
Unit /
Abbreviation
De fi
nition
A
Accel
e
rator Pedal
AP
Af
ter Botto
m Dead
Center
ABDCEvent occurri ng after
BDC
Af
ter Top Dead CenterATDCEvent occurri ng after
TDC
Ai
rbag /
Supplementary
Restraint System
Airbag, SRSAi rbag restraint system for
dr
iver and front seat passenger
Air Cleane rACL
Air ConditioningA/C
Air Conditioning Con t
rol
Module
A/CCMModule c
ontrolling air conditioning, heating and ventilation
Air Conditioning SignalACSA
i
r conditioning compressor clutch operation is signalled to the ECM which
induces idle speed corrections to co mpensate for engine load changes
Alternating cu
rrent
ac
Ai
r Fuel R
atio
AFRN
omi
nally 14.7 parts air to one part fuel
Ampe
reASI unit of current
Ampere hourAhA current of one ampere
fl
owing for one hour
Anti-Lock Braking SystemABSS
y
stem which prevents wheel lock-up
under braking by sensing lack of
rotation of a wheel(s) and divertin g fluid pressure away from it (them)
ABS Control Mo
dule
ABS CM
ABS /
T
raction Control
Control Module
ABS / T
C CM
Atmosph
e
re
atmU
n
it of pressure (1.01325 bar)
Au
to
matic Stability
Control
ASCA form of vehicle
control
in which the ECM reduces en gine torque to control
wheel-spin
B
Baro me
tric Absolute
Pressure Sensor
BAR OSensor measuring the pressure of surr ou
nding air at any given temperature
and altitude
Bat t
ery positive voltage
B+The posi
ti
ve voltage from a battery or
any circuit connected directly to it
Before Bottom Dead
CenterBBDCEvent occurri ng before BD
C
Before Top Dead

Center
BTD
CEvent (usual ly
ignition) occurring before TDC
Blowe
rBLRDe
vice which supplies a current of air at
moderate pressure, e.g. heater or
A/C blower
Body Processor M
odule
BPMControl modu
le
for body electrical systems, e.g. interior lamps, windshield
wash / wipe control
Bott om D
ead Center
BD
CLowest poin t of piston
travel in a reciprocating engine
Brake hors
epowe
r
bhpEffecti
ve horsepower devel
oped by an
engine or motor, as measured by a
brake applied to its output shaft
Brake Mean Effective
Pres sureBME PThat p
art of the effective
pressure developed in a cyli nder that would result in
a cylinder output equal to the bhp of the engine
Brake On/ O
ff
BOOIn
dic
ates the position of the brake pedal
Br
it
ish Standard
BSStan
dar
d specification issued by the British Standards Institution
Br
it
ish Standard
Automotive
BSAu
BusTopology of a commu n
ication network
Bypass
AirBPAMechanica l
control of throttle bypass air
C
Camshaft Posit
i
on Sensor
CMPSIndi
cat
es camshaft position
Canadian Motor
V
ehicle
CMVSS

Air Distribution and Filtering - Center Registers
Removal and Installation
Removal
Installation

1.
Remove battery cover and disconnect ground cable from battery
terminal. Refer to 86.15.19.
2. Remove passenger airbag deployment door for access. Refer to
Section 501-20.
3. Remove major gauge module veneer panel for access. Refer to
76.47.24.
4. Carefully withdraw fascia centre veneer panel.

5. Slacken and remove four screws securing centre vent assembly
to fascia.
6. Withdraw centre vent assembly for access, disconnect clock
harness multiplug, release clock retaining tangs and remove clock
from vent assembly.

7. Remove and discard the four veneer panel to fascia securing
clips.
1. Fit and fully seat new veneer panel retaining clips to fascia.
2. Fit clock to centre vent assemb ly, ensuring retaining tangs are
fully seated.
3. Position centre vent assembly at fascia and connect clock
harness multiplug.
4. Fully seat vent assembly in fascia and fit and tighten securing
screws.
5. Fit and fully seat centre veneer panel.
6. Fit major gauge module veneer panel. Refer to 76.47.24.
7. Fit passenger airbag deployment door. Refer to Section 501-20.
8. Connect ground cable to battery terminal and fit battery cover.
Refer to 86.15.15.

Body closures
Each front and rear door consists of a welded, mild steel inner frame and an outer panel. The outer panel is welded to the
waist rail and cheater of the inner frame, then bonded and clinched to fo rm the door assembly. Cosmetic PVC bead is
applied to all clinch joints. Sp onge rubber seals are mounted on the doors. Inte rnal insulation is provided by a foam water
shedder attached to the door by double-sided adhesive tape.
The door aperture B/C posts are reinforced over their full height to fully satisfy all forthcoming European and Federal side
impact legislation. The hood consists of one piece inner and outer panels clinched and bonded together, with cosmetic bead
PVC sealant applied to all clinch joints. Th e hood pivots at the front on two hinges each secured by bolts to the hood front
underside and the BIW front upper crossmem ber. Two gas struts secured to the hood by pivot pins and snap-on couplings,
support the hood in the open position. A full width insulating pad is secured by screws to the underside of the hood. A
sponge rubber tubular seal is mounted tran sversely towards the front of the hood underside. The trunk lid is of similar
construction to the hood, consisting of inner and outer pa nels clinched and bonded together and PVC bead sealed.
Incorporating a removable moulded liner and two trunk illuminati on lights, the trunk lid is supported when open, by two gas
struts, each secured to the inner wheel arch and trunk hinge by snap fittin gs. For some markets, a warning triangle is
attached to a bracket on the trunk lid underside and is retained in the open position by a rubber block.
Fascia
One-piece slush-moulded fascia on inject ion moulded armature and steel cross-rail reinforcement. Fascia support brackets
set with BIW to achieve close tolerance fit of fascia to bo dy eliminate necessity for adjustment following removal and
installation..
Fuel Filler Flap
The fuel filler comprising a hinged flap attached to the body decking panel by tw o nuts, incorporates a rubber buffer, snap-
in striker, hinge spring and fuel cap stowage magnet. The rubber fuel bowl moulding is attached via a steel armature to the
body reinforcement panel by five M5 nuts and is retained at the filler neck by a clip. The mating drain tube is fitted with an
internal filter. The fuel filler flap latch mechanism attached to the fuel bowl armatu re by two M5 nuts, includes a locking pin
and actuator which are both se rviceable items. The latch actuator operates independently from the central locking system;
it is driven directly by the se curity and locking control module. Locking of the fuel filler flap is achi eved only by operation of
the key or by the remote rf transmitter.
Seating
All front seats are equipped with electric height adjustment. In addition, both seats are available with manual or power
forward and rearward adjustment, manual or power operated headrest adjustment, 12 way electric adjustment, memory
controlled 12 way seat adjustment and integral seat heating. A side air bag module is installe d in the outboard squab wing
of each front seat. Each front seat has a non-handed, one-piece frame incorporatin g cushion and squab frames, side air bag
support bracket and seat adjuster mechanis ms. Seat switchpacks are installed on the outboard side of driver and passenger
seats and control modules are installed in the base of each seat . The standard rear seat is of fixed, bench type with full
width removable cushion. For certain mark ets, two individual rear seats are available as an option on long wheelbase
models. Both type s of rear seat are available with th ermostatically controlled heating of the cushion and sq uab. Individual
rear seats are electrically adjustable fo r squab re cline (via cushion fore and af t movement), head restraint height and
lumbar support. Separate motors provide ad justment of each seat cushion and head restraint and an electrically driven air
compressor provides variation of lumbar support. Seat adjustment is controlled via switches installed on a panel in an
extension to the centre console.Both the driver and front pass enger seat are secured to the vehicle floor at four points.
Interior Trim
The one-piece door casings are trimmed in UEV to match the seating, with wood veneer at the waistline and a carpet insert
at the front lower corner. Each casing is secured to the door inner panel by fir tree fastener s along the lower section, two
armrest fixings at the centre and veneer panel dowels and fixings at the top. The armrests which are common to front and
rear doors, are trimmed in matc hing leather or UEV according to specification. Switchpacks dedicated to driver and front or
rear passenger, are incorporated in the ar mrests. A speaker is installed in the lower section of each door and a tweeter is
incorporated behind each interior door handle escutcheon. where premium ICE is fitted, the front tweeters are installed in
the upper A posts. On each side, a graine d UEV finisher trimmed to match the head lining is secured to the 'A' post and
cantrail by fir tree fasteners locating in BIW apertures. Th e upper 'D' post finisher is trimmed and secured in the same
manner. The single piece'B' post finishers, also finished in grained matching UEV, each have a front seat belt exit aperture
and are secured to the BIW by four spring clips and two fir tree fasteners. The one-piece headlining consists of a 6mm thick
polyurethane foam membrane covered with suede effect knitted polyester. The headlining is secured to the BIW roof by
body tangs, the roof console, sun visors, combined grab handles and coat hooks, th e cantrail finishers and where fitted, the

located behind the trunk lid badge.
Occupant Restraints
Inertia reel seat belts with electronically controlled pre-tensioners are installed at the front seats. Supplementary occupant
restraint is provided for driver and front seat passenger by front airbags, and side air bags installed in the outer wing of
each front seat. Standard inertia reel type belts are fitted to all three rear seat positions. The front seat belts are provide d
with height adjuster units which are attached one to each of the 'B' posts. Where emergency locking retractor/automatic
locking retractor seat belts are provided, the belts have two operating modes.The inertia reel mode with emergency locking
retractor is for adult passenge r use only and operates to allow the occupant some freedom of tors o movement under normal
travel conditions.. The static reel mode which prevents belt payout and must be used when a ch ild seat is installed, is
activated by fully extending the belt to engage the ratchet me chanism,.then releasing the belt. Operation of the ratchet will
then be felt and the belt w ill become locked in that position. To revert to in ertia reel (adult passenger) mode, pay the belt
back into the reel to th e fully retracted position.
Body Structure
The XJ8 sedan body is produced in monocoque standard and lo ng wheelbase form. 70% of the body panels are zinc coated
to achieve optimum corrosion protection and a further 8% are constructed in high st rength steels to provide high torsional
strength and passenger impact protection.
Doors
Each front and rear door consists of a we lded, mild steel inner frame and an outer panel. The outer panel is welded to the
waist rail and cheater of the inner frame, then bonded and clinched to fo rm the door assembly. Cosmetic PVC bead is
applied to all clinch joints
Hood
The hood consists of one piece inner an d outer panels clinched and bonded toge ther, with cosmetic bead PVC sealant
applied to all clinch joints. The hood pivo ts at the front on two hinges each secured by bolts to the hood front underside and
the BIW front upper crossmember. Two gas struts secured to the hood by pi vot pins and snap-on couplings, support the
hood in the open position.
Trunk
The trunk lid is of similar construction to the hood, consisting of inner and outer panels clinched and bonded together and
PVC bead sealed. The trunk accommodates the spare wheel, the battery, an electrical carrier containing electrical fuses,
relays and modules and where premium ICE is fitted, a compac t disc auto-changer mounted on body bracketry. Carpet
covered trims line the trunk sides and front inner panel and a po lyurethane rear finisher is secured to the rear panel by
spring clips and fir tree fasteners.
B and C Post Reinforcement

Seating - Seats Description and Operation
Front Seats

All front seats are equipped with electric height adjustment. In addition, both front seats are available with manual or power forward
and rearward adjustment, manual or powe r operated headrest adjustment, 12 way elec tric adjustment, memory controlled 12 way
adjustment and integral seat heating. A side air bag module is installed in the outboard squab wing of each front seat. Each se at has a
non-handed, one-piece frame incorporating cushion and squab frames , side air bag suppoort bracket and seat adjuster mechanisms.
Sear switchpacks are installed on the outboa rd side of driver and passenger seats, and control modules are installed in the bas e of each
seat. Both the driver and front passenger seat ar e secured to the vehicle floor at four points.
Rear Seats

The standard rear seat is of the fixed, bench type with full wi dth removable cushion. Two individual rear seats are fitted to certain long
wheelbase models. Both types of rear seat are available with thermostatically controlled heating of the cushion and squab. Indi vidual
rear seats are electrically adjustable for squab recline (via fore and aft moveme nt), head restraint height and lumbar support. Separate
motors provide adjustment of each seat cushion and head restraint and an electrica lly-driven air compressor provides variation of
lumbar support. Seat adjustment is controll ed via switches installed on a panel in a rear extension to the centre console.

Instrument Panel and Console - Instrument Panel
Removal and Installation
Removal
1. Turn ignition switch to position II.
2. Motor driver and front passenger seats rearward.
3. Position steering wheel in stra ight ahead position and fully
lower and extend steering column.
4. Turn ignition switch to position O.
5. Remove battery cover and disc onnect ground cable from
battery terminal. Refer to 86.15.19.
6. Remove 'J' gate finish er. Refer to 76.25.24.
7. Remove 'J' gate finisher retain ing panel. Refer to 76.25.26.
8. Remove centre console veneer panel. Refer to 76.47.26.
9. Disconnect and remove radio.
10. Remove centre console switch module. Refer to 86.80.32.
11. Remove centre console. Refer to 76.25.01.

12. Slacken and remove centre cons ole vent duct rear securing
screw and withdraw duct assemb ly from air conditioning unit
manifold.
13. WARNING: BEFORE ANY AIRBAG/SRS SERVICE IS
PERFORMED, AT LEAST ONE MINUTE MUST ELAPSE AFTER
DISCONNECTION OF THE BATTERY CABLE, TO ALLOW
DISSIPATION OF BACK-UP POWER SUPPLY ENERGY.
Remove driver airbag. Refer to 76.73.39.
14. Remove steering wheel. Refer to Section 211-04.
15. Remove steering column lo wer cowl. Refer to 76.46.03.
16. Remove steering column u pper cowl. Refer to 76.46.02.
17. Remove driver side unders cuttle. Refer to 76.46.11.
18. Remove combined windshield wiper/washer switch and
audible warning speaker assembly. Refer to 86.65.42.
19. Remove glovebox. Refer to 76.52.03.
20. Remove 'A' post lower trim pads. refer to 76.13.30.
21. Carefully withdraw driver stowage bin trim, remove bin
securing screw and remove bin from facia.

multiplug.

52. Withdraw in-car sensor from housing and remove
housing/trunk release switch assembly.

53. Remove LH vent/duct assembly from facia.
Remove two screws securing vent/duct assembly to facia
and remove assembly. Remove and discard screw
retaining plastic inserts from facia.

54. WARNING: FOLLOWING DISCONNECTION OF THE
BATTERY, A PERIOD OF AT LEAST ONE MINUTE MUST BE
ALLOWED TO ELAPSE BEFORE ANY WORK IS CARRIED OUT ON
AN AIR BAG MODULE.
Remove passenger air bag depl oyment door for access, and
remove and discard deployment d oor retaining clips from facia.
55. Remove and discard four nuts securing passenger air bag
module to facia.