JAGUARS-TYPEChassis
51 accelerometer is used for Dynamic Stability
control (yaw control). The rear vertical
accelerometer is fixed to the rear electronic
control module (RECM) bracket on the rear right-
hand side of the luggage compartment between
the rear wheel arch and the rear lamp pack.
Suspension Alignment
A special tool has been designed to enable correct
alignment of the suspension to the body.
Connected to a personal computer, a transducer
with a wire measuring device is fitted to a plate
attached to the Number 2 cross member.
Alignment pins are fitted to the body front and
rear to the left-hand side chassis rail and to the
rear suspension beam. Measurements are taken
from one point on the Number 2 beam. Then the
transducer is transferred to the other point on the
beam and a second set of measurements taken.
The PC then calculates if there is any
misalignment and by how much, and displays the
information on the screen. The beam(s) are then
adjusted to bring the alignment back within limits
and a further series of measurements are taken.
This process is repeated until the alignment is
correct and the beams are then tightened. A
print-out of the measurements is to be attached to
the job card as a permanent record of alignment.
Note that camber, caster and toe may be required
if any of the beams have been adjusted.
JAGUARS-TYPEChassis
55
Brakes
Brake Control Module
Brakes are controlled with a Teeves Mk 20E brake
modulator.
The anti-lock brake/traction control, control
module (ABS/TCCM) contains the integral software
for ABS and traction control, similar to current XJ
and XK Series vehicles. It is supplied as a 10 valve,
4-channel module and calibration is the same to
all powertrains. It is connected to the SCP bus for
traction control, warnings and vehicle speed.
Dynamic Stability Control
Dynamic stability control (DSC) is a new Jaguar
safety feature, which uses ABS and traction
control to control yaw movements of the vehicle.
Yaw is the rotary motion of the vehicle on its
vertical axis, a force that would cause oversteer or
oversteer or sideslip. The dynamic stability
control module (DSCM) contains the same
software as described but with the addition of IVD
software. The modulator is supplied as a 12 valve,
4-channel module calibrated for base suspension
only. The connectors differ between the two; the
10 valve unit has a 25-way with sliding cam, as
D.206.254
D.206.175
BRAKE CONTROL MODULE
BRAKE SYSTEM LAYOUT
