hydraulic
pressure.
Ihe driver should not aitempt
lo emulate
this
prccess
by'pumping'the
brake
pedal,
as modulalion
in lhis
mannerwill treal all four
wheels similarly, rather than individually
as afforded by theABS eleclrcnics.
An ABS lell lale lamp in lhe anslrument
panel
rs
provided
to
wam thal lhe
integral self diagnostic systefi has identified
a
prcblem,
and to
indicale that the anti-lock funciion
has been
turned on See
ABS iell lale lamp'.
Aril|iNnr
'
The amber
ABS tell tale in lhe instrument
panel
should
lightforabout 3seconds followlng ignition switch on,
and
then
go
out.
ll the lamp remains lit, or
comes on whilst
driving, a fault in th€anti-lock brakesystem is indicated.
The base brake system
will
conlinue
to
operate normally,
butwithout
the anti-lockfeature. Hoavy braking, or
brak-
ing on slippery surfaces may cause one ormorewheels
to lockand
resultin reduced steering response and
pos-
sible loss of control.
The carmay continueto
be driven with appropriate care
and
anticipation, butshould be checked and repaired at
the earliesl opportunity.
'
The increased conlrol that ABS
provides
should not
induce
you
to take more
risks with
your
safety. ABS will
not
prevent
a skid caused byabruptrteedng movements,
or attempting to comertoo
quickly.
.
Always maintain a saf€ tollowing distance from other
vehicles relative to the
road
surface
and weather condi-
tions.
'
ABS doos not avoid the
risk of an accident due to inap-
propriate
speed. The driver is al all times responsible
for thejudgement of sale speed,
'
The control unit of the ABS is s€t for standard
wheel
and ilre sizes.
lf non-standard wheels or tires are fiiled,
the control unit rnay mis-interpret the speed
of the cat
because of the varian! data it receives trom the
wheel
gpeed
sensors.
Fitting
non-approved
wheels or tkes
could seriously affect the
performance
oItheABS.
.
Activation of lhe AgS will vary
according
to the level
of
grip
available at the tires, On dry surfaces, activation
will occur only with a high
pedal pressure.
On slippery
surfaces,
only a low
pedal pressure
will be
n€eded,
.
On looie or uneven
surfaces, such as
gravel
or snoq a
carwith
ABs may ne€d a longerslopping dlstance- allow
a
grsaler following distance
in lhese conditions.
Hydraulic Brake Assisl
{HBA)
Hydrautic
Brcke Assist,
1s incorpo€led into the ABs to help
prcducethe minimum stopping
distancewhen eme€ency btak-
ing isdemanded.
Byconlinuous monitoring
ofthe brake
prcssure,
the
ABS control module
is abl€ lo idenlify when such an event
occurs,
and when necessary
incrcases hydmulic
pressure
up
to the anti'lock
activalion threshold, thus
producing
oplimum
controlled
btaking.
Electronic Brake Distribution
(EBD)
Thas
feature addrcsses the instability that could be caused
under heavy braking due to the tendency of the
lightly loaded
rearwheels
to lock
pt€maturely.
Eleclronic Brak€ Distribution is
incorporated into lhe ABS lo limit ihe rear brake system hydraulic
pressure prior
to any anti-lock intervention.
Electronic Differential Lock
{EDL)
lf hard acceleration is demanded in conditions oi va able
surface
grip,
orwhen comering forces lesult in a lightly loaded
inside rear wheel, thee will be a lendency for d ve torque to
overcome the
grip
available, resulling in spinning
of the
lightly
loaded wheel. When this situation is delected by theABS con-
trcller, btake
pressurc
is applied to
the spinning
wheel in order
to transfer d ve toaque to lhe opposite wheel, lhus maintaining
drjve and aiding vehicle siability.
See also'Lotus Traction Control'
(page
91).
Electronic
Stability Programme
(ESP)
Thjs fealu€ enhances vehicle
stability
in
extreme manoeuvres
typified by
accidenl avoidance att€mpts or misjudged come ng
demands, Current vehicle
behaviour is conslanlly monitored,
and compared with
a delenninalion ofdriver intent as indicated
by data
gathered
from the
driving controls. When vehicle stabilily
is
al sk, theABS is
ulilised to apply a measued braking force
to individual
wheels as necessary
in oder to help the ddver
maintaln
control of the
vehicle.
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