2005 JAGUAR S TYPE airbag

JAGUARS-TYPEOccupant Protection
34
D.501.1474
SIDE AIRBAGS the pressure vessel to inflate the airbag. The
airbag is a top mounted assembly and deploys in
an upwards direction, climbing the windshield
before folding downwards. After deployment, the
bag deflates through two vents.
The airbag deployment door is an integral part of
the top fascia moulding. The airbag module is
bolted to the underside of the fascia via a steel
deployment chute and is also bolted to two
brackets on the tubular cross car beam which
supports the fascia assembly.
Note:The module is not handed. To access the
airbag module, the complete fascia assembly must
be removed.
Side Airbag
Side airbags are incorporated into the driver and
front passenger seat squabs and are similar to
those fitted to the XJ Series, using compressed
argon to provide the inflation gas. The bag has a
capacity of 19 litres and provides protection to
both the head and chest regions.
The side airbag module is fixed to the outer seat
frame and is located within a fabric deployment
pocket. The pocket is stitched to the seat cover
seam and when the module is triggered, this
length of seam bursts to provide the deployment
exit for the airbag.
D.501.1474
If a damaged seat cover is to be replaced, the side
airbag module must be removed and re-located in
the deployment pocket of the new seat cover.
The complete seat must be replaced if the airbag
has been deployed.

JAGUARS-TYPEOccupant Protection
35
SRS Operation
J.501.940
AIRBAG SYSTEM (LHD) The Supplementary Restraints System (SRS)
provides impact sensing, control of deployment
and fault diagnosis of the control module, airbags,
pretensioners and associated circuits. Most of
these functions are carried out by the Restraints
Control Module (RCM).A front impact triggers the driver and passenger
airbags and both pre-tensioners provided the
impact is above a set threshold as detected by the
two longitudinal sensors in the RCM.
When a side impact occurs, the lateral safing
sensor in the RCM must also agree with an impact
Data Link
ConnectorPCM
VEMSBack-up
Warning
SounderAirbag
Warning
Lamp
Passenger
Airbag Driver
Airbag
RCM
Side Impact
Sensor
Passenger
Side Airbag
Front
Seat Belt
Pre-tensioner Side Impact
Sensor
Driver
Side Airbag
Front
Seat Belt
Pre-tensionerInstrument Pack
J.501.940

JAGUARS-TYPE
D.418.233
Occupant Protection
36
Restraints Control Module (RCM)
The RCM:
¥ Houses the electro-mechanical safing sensor
and electronic discrimination sensor which
detect a frontal impact.
¥ Houses the electronic safing sensor to detect
a side impact.
¥ Identifies severity and direction of impact
and makes decision on deployment of airbags
and pre-tensioners.
¥ Provides firing signals to all airbags and pre-
tensioners.
¥ Performs on board testing of the airbag and
pretensioner firing circuits, warning indicator
circuits and module status (Side Impact
Sensor performs its own internal checks).
¥ Stores fault codes in non-volatile memory.
¥ Drives the airbag warning lamp on the
instrument pack: if the warning lamp is
faulty (fault code recorded) an audible
warning tone is sounded.
¥ In the event of an impact, sends a signal to
the vehicle emergency message system
(VEMS) and the PCM to indicate that a crash
has occurred.
¥ Is connected to the data link connector via
the SCP data bus to enable communication
with an external PDU or scan tool.
¥ Provides temporary back-up power to operate
the airbags in the event of loss of battery
supply in an impact.
¥ In the event of an impact, records certain
data for subsequent access via the data link
connector. This data includes deceleration
information, firing delay and fault codes.
The RCM is bolted to the top of the driveshaft
tunnel below the center stack. Due to the
importance of the module being securely fixed to
the vehicle body, the ground connection is made
via the fixing bolts and is monitored by the
diagnostic system. A bad connection causes a fault
code to be generated.
Note:The torque settings are safety critical and
the figures given in the JTIS Service instructions
must be adhered to. RESTRAINTS CONTROL MODULE
D.418.233
detection signal received from either the LH or RH
Side Impact Sensor in order to deploy the
corresponding airbag.
Note:An impact at an oblique angle may cause
both frontal and side airbags to deploy, depending
on how much lateral acceleration is sensed.

JAGUARS-TYPEOccupant Protection
37
D.418.445
SIDE IMPACT SENSORSide Impact Sensor
The side impact sensors are mounted on brackets
attached to each inner sill.
The side impact sensor contains an electronic
discriminator sensor which detects side impacts
above a set threshold and signals a deployment
request to the RCM. Bag deployment only occurs
if the side safing sensor in the RCM has also
detected an impact.
The side impact sensor monitors its own internal
state, including correct ground connection, and
sends a regular ÔheartbeatÕ signal to the RCM
indicating that it is functioning correctly and is
available.
A 2 wire cable is connected between the RCM
and the side impact sensor. The cable has a dual
function, supplying power to the side impact
sensor and transmitting digital data to the RCM.
Diagnostics
The restraints control module (RCM) performs all
SRS diagnostics except those relating to the side
impact sensor internal faults and grounding faults.
When the ignition is switched on, the RCM carries
out a system Ôprove outÕ over an 8 second period
during which the airbag warning lamp on the
instrument pack is lit for the first 6 seconds.
During the prove out period all circuits connected
to the RCM are tested and also the state of the
RCM and side impact sensors (including ground
resistance and supply voltage).
If no faults are detected, the airbag warning lamp
remains off after the 8 second period.
If a fault is detected the warning lamp flashes a
two digit code five times and then remains lit until
the ignition is switched off. This is repeated on
each ignition cycle until the fault is cleared. Fault
codes are allocated a priority and if more than
one fault is stored in the RCM memory, the
highest priority fault is flashed. When this fault is
rectified, the next priority fault is indicated.
If the warning lamp itself is inoperative, the RCM
stores a fault code but no other action occurs. If a
system fault occurs when the lamp is inoperative,
a five ÔbleepÕ audible warning is sounded five
times with 5 second intervals. The audible
warning is repeated every 30 minutes and on
subsequent ignition cycles until the fault is
cleared.
If no faults are found during the system prove out
period the RCM continues to test the SRS system
during the remainder of the ignition cycle.Fault diagnosis of the side impact sensor is
normally carried out using the portable diagnostic
unit (PDU). Where the PDU is not available, the
flashing code on the airbag warning lamp indicates
the likely circuit or component fault.

JAGUARS-TYPEChassis
59
D.211.248
FRONT STEERING ARM requires a Service tool to assist removal. Low-
pressure hose connections are made using
Constant Tension (CT) clamps. Pinion hydraulic
connections are orientated with the bottom
connector low pressure with the longer nut, as
current vehicles.
The PAS fluid is for PAS only; it is not to be used
for transmissions. After manual filling, the system
must be bled using a vacuum pump to remove all
the air from the system to prevent system noises.
Fluid level is checked through a sight window on
the reservoir.
Components replaceable are complete pump,
steering rack, reservoir or hose assembly.
A non-serviceable 10-micron filter is located
within the reservoir to maintain fluid cleanliness
throughout the life of the vehicle. It is essential as
with all Jaguars that the system does not become
contaminated. Cap all ports on disassembly to
prevent contamination ingress. As with current
vehicles, the fluid and reservoir must be renewed
if any major component is replaced i.e. Rack,
pump or cooler.
The road wheels should be set straight ahead and
the steering wheel locked (using service tool
F7LC-3F732-BF) when removal and assembly of
the steering gear or intermediate shaft is required.
This is necessary to prevent damage to the air bag
clock spring within the steering upper column
assembly. The intermediate shaft can only be
assembled to its mating components in one
location. Steering wheel alignment can only be
achieved by adjustment at the tie-rods. A
dimensional check of the steering rack position
may be necessary to verify rack centre.
Steering Column
The steering column assembly is completely new
and uses no parts from previous Jaguar
assemblies:
¥ Construction of the upper column assembly is
based on the use of aluminium extrusions and
castings.
¥ A two shaft lower column assembly is used.
¥ The electronically controlled steering lock, the
steering column lock module (SCLM), is a
physically separate component from the
ignition switch which is fascia mounted.
¥ The dynamic stability control (DSC) steering
wheel position sensor is fitted to the upper
column assembly.
Steering Wheel
The steering wheel consists of a magnesium
armature with a central steel insert. The steering
column and wheel insert are splined with a flat so
that the wheel can only be fitted in one position.
Any misalignment of the steering wheel is
corrected by adjusting the tie rods. The splined
fitting also has a locking taper which requires the
use of a 2 legged puller to remove the wheel.
The steering wheel incorporates the the airbag
module, horn mechanism and the optional cruise
control and audio/phone switches.

JAGUARS-TYPEElectrical/Electronic
76Air Conditioning Control Module (A/CCM)
The A/CCM is connected to the SCP
communication network. The A/CCM controls
automatic climate functions that maintain the
vehicle at a constant temperature setting.
Instrument Pack
The instrument pack is connected to the SCP
communication network. The instrument pack
displays information received on the SCP
including speedometer, odometer, fuel, and
message center warnings. The instrument pack
also controls the passive anti-theft system (PATS).
General Electronic Control Module (GECM)
The GECM is connected to the SCP
communication network. This module is located
behind the LH ÔAÕ post trim panel below the
fascia. The GECM controls many of the bodysystems, being directly linked to the interior
lighting, wiper and security systems. It is a support
module for other systems including exterior
lighting, locking, remote entry, mirrors
(passenger), seat/mirror/steering column memory
recall and windows.
Rear Electronic Control Module (RECM)
The RECM is connected to the SCP
communication network. This module is located in
the passenger side luggage compartment behind
the trim panel. The RECM controls the
locking/unlocking of the front passenger and rear
doors and provides power control of the fuel
pump.
Powertrain Control Module (PCM)
The PCM is connected to the SCP communication
network. For the location of this module see the S-
TYPE Powertrain Technical Guide The PCM
controls the engine performance, electronic
ignition, emission controls, speed control,
transmission and on board diagnostics.
Steering Column Lock Module (SCLM)
The SCLM is connected to the SCP communication
network. The module is an integrated unit
containing the steering column lock and lock drive
and is controlled remotely from the separate
ignition barrel.
Restraints Control Module (RCM)
The RCM is connected to the ISO 9141
communication network. The RCM controls the
deployment of the air bags based on sensor
inputs.
Vehicle Emergency Control Module (VECM)
The VECM is connected to the SCP
communication network. The module allows a
user to request emergency assistance (police,
ambulance, fire, wrecker) or directions to a
desired location at the touch of a button. Also, if
any of the vehicleÕs airbags are deployed while the
VEMS system is powered ON, the system
automatically issues a call for emergency
assistance.
Voice Activation Control Module (VACM)
The VACM is connected to the SCP
communication network. This module is located in
the driver side luggage compartment behind the
trim panel. The VACM controls and processes all
D.418.229
GENERAL ELECTRONIC CONTROL MODULE (GECM)
Inertia Switch
Secondary
Junction Box
General Electronic
Control Module

JAGUARS-TYPEElectrical/Electronic
95
Instrumentation and Controls
1. Instruments pack
2. Wipers/washers and headlamp power
wash switches,
3. Trip computer switches,
4. Hazard warning switch,
5. Audio system control panel,
6. Cassette stowage, telephone presenter or
navigation display,
7. Climate control panel,
8. Ashtray and cigar lighter,
9. Traction control or dynamic stability
control switch,
10. Sports mode switch,
11. Front seat heater switches,
12. Coin tray,
13. Cruise control switches,
14. Horn and driverÕs airbag,
15. Audio switches,
16. Dimmer switch,
17. Bonnet release lever,
18. Headlamp levelling switch,
19. Fuel filler flap release switch,
20. Luggage compartment release switch,
21. Exterior lighting switch,
22. Direction indicators and main beam
switches,
1
7
8
9 10 11 12 13 19
16 17 18 20 21 22
142
3
45
6
15
Instrument Pack
Vehicle instrumentation is installed on the
instrument pack on the fascia. The calibration of
the odometer and speedometer, the language of
the message center and the composition of the
indicator lamps are tailored to suit the destination
market. The instrument pack acts as a system
monitor for the audible and visual warnings.When the ignition switch is turned to position II,
the following visual warnings (telltales) are
illuminated for three seconds to provide a bulb
prove out function:
¥ ABS telltale
¥ Airbag telltale (six seconds prove out)
¥ Catalyst over temperature telltale (Japan only)
¥ Charging system telltale

JAGUARS-TYPEElectrical/Electronic
96
JOL.002
1. Engine temperature gauge
2. Direction indicators
3. Tachometer
4. Front fog lamps on
5. Traction control/DSC warning light
6. Main beam on
7. Rear fog lamps on
8. Speedometer
9. Fuel gauge
10. Overspeed Warning (Middle East markets
only)
11. Airbag system warning light
12. Seat belt warning light - driverÕs seat belt not
fastened13. Anti-lock braking system warning light
14. Brake warning light
15. Message center warning light - primary
warning
16. Message center display - displays odometer,
trip, status/warning messages
17. Message center amber warning light -
secondary warning
18. Check engine warning light
19. Charge indicator warning light - high or low
battery voltage or faulty generator
20. Low oil pressure warning light
21. High engine temperature warning light INSTRUMENT PACK
126 5 4
3
109 8 7
112
13 12 18 20 19 1416 15 17 21
¥ Low brake fluid / Park brake telltale
¥ Fail safe cooling / Engine overtemperature
telltale
¥ Check engine telltale
The driver warning chime provides the driver with
an audible warning for the ignition on, key in
ignition, all doors open and the headlamps on,
hood open, trunk open, lamps on and safety belt
not engaged. A chime will sound every one
second when a fault in the air bag circuit is
detected.
The driver is also provided with a visual message
or warning displayed in the information message
center.