change time JAGUAR S TYPE 2005 1.G Technical Guide Update

JAGUARS-TYPEChassis
47
Front Suspension
The independent front wheel suspension is a
double wishbone axle arrangement with
aluminium control arms. The two arms are of
different lengths, which minimises the changes in
track and camber. Inclination of the upper control
arm axis provides anti-dive front suspension
action. There are two front cross members,
known as Number 1 and Number 2.
Number 1, the forward cross member, is a steel
fabrication, non-isolated, which locates the lower
control arm front mounting, the anti-roll bar and
the cooling module.
The rear cross member, Number 2, is an
aluminium casting, non-isolated and it locates the
lower control arm rear mounting, the power
steering rack and the engine hydro-mounts.
WARNING: No attempt must be made to
weld or repair the aluminium cross
member. If it is damaged, a new one must
be installed.
Lower Control Arm
The lower control arm is an aluminium forging
and has locations for the damper and the anti-roll
bar drop link. It is mounted with one hydro-bush,
the front lower bush, and one rubber bush, both
serviceable. This is the first time that a hydraulic
bush has been fitted to a Jaguar wishbone. The
hydro-bush is tuned for refinement and helps to
J.204.402
reduce brake vibration.
Service adjustments for caster and camber can be
made to the lower control arm geometry with the
addition of cam bolts (not supplied with the
vehicle).
LOWER CONTROL ARM
J.204.402
Lower
Control Arm
Anti-roll BarAnti-roll Bar
Drop Link

JAGUARS-TYPEChassis
53
Driveline
Introduction
The driveline is a standard type with the engine
position at the front and driven rear axle. This will
be the first time that Jaguar has used in-plant
driveline balancing to improve noise, vibration
and handling. The driveline is finely balanced at
the rear driveshaft joint. The centre bearing is
laser aligned during initial factory build.
The alloy rear engine mountings have two
variants, one for automatic transmission and one
for manual transmission. They are both
serviceable items. The V6 auto is the same as the
V8 but rotated in plan by 180 degrees. The rubber
mountings are carry over concept from the
current XJ and XK Series vehicles but are not
D.307.322
DRIVELINE ARRANGEMENTinterchangeable with them. Both automatic
transmission rubber mountings are common but
with a softer unique mount for the manual V6
transmission.
In service if they are replaced, ensure that there
are buffer gaps and that they are approximately
equal. Neither will be contaminated by lubricant
or automatic transmission fluid.
Driveshaft
The S-TYPE has a two-piece welded steel tube
driveshaft with a splined centre slip joint and
locking collar, the whole being aligned with the
body centreline. The driveshaft has rubber flex
couplings and a rubber, body-mounted, centre
bearing. For safety, the front tube is collapsible.

JAGUARS-TYPEElectrical/Electronic
72
Module Communications Network
ISO9141 DIAGNOSTICS LINK
Powertrain
Control Module
ABS/TC
Control Module
Dynamic Stability
Control Module
Restraint
Control Module
Adaptive Damping
Control Module
Park Aid
Control Module
Data Link
Connector
PCM Flash Programming Link
Serial Data Link The multiplexed electrical architecture is used for
the exchange of information between control
modules, the instrument pack and the data link
connector.
Multiplexing allows more than one piece of
information to be carried along a wire. In this
way, the electronic control modules can
communicate with each other quickly and share
information. With multiplexing, just two
intertwined wires carry information to any control
module on the network. On the SCP system
hundreds of messages a second can be
transmitted; the maximum waiting time is only a
few hundred milliseconds. An additional benefit is
that the modules ÔsleepÕ when not in use,
reducing battery drain.Principles of Operation
The vehicle has two module communication
networks. The first is the Standard Corporate
Protocol (SCP - J1850 SAE standard)), which is an
unshielded twisted pair cable: data bus plus and
data bus minus. The second is the International
Standard Organization (ISO) 9141 communication
network, which is a single wire network. Both
networks can be connected to the PDU tester by
one connector: the data link connector. The data
link connector is located under the instrument
panel, between the steering column and the audio
unit.
The ISO 9141 communications network does not
permit inter-module communications. When the
PDU tester communicates to modules on the ISO
9141 communication network , the PDU must ask
for all information; the modules initiate
communications.