Lotus Traction Control & Limited Slip Differential - Lotus ELISE 2007 Owner's Handbook Manual

Lotus Traction Control & Limited Slip Differential (if fitted)
Options available for the Elise and Exige models include
Traction Control alone, and Traction Control with a Limited Slip
Differential.
Lotus Traction Control (LTC) is a software programme within
the engine electronic control unit (ECU) which uses inputs from
the wheel speed sensors to determine the degree of wheelspin
occurring, and when necessary, modulate fuel injector delivery
to control engine power output until grip is restored. This feature
can improve vehicle stability in some extreme conditions of use,
especially where variable surface grip prevails, or when maximum
vehicle performance is being exploited.
Cars fitted with the optional Limited Slip Differential (LSD) are
also equipped with Lotus Traction Control. The LSD is a device
incorporated into the final drive unit which limits the speed dif-
ferential between the two rear wheels by mechanically distributing
the applied torque in accordance with the available grip at each
tyre. This feature can enhance vehicle performance in certain
types of off-road or closed venue competition, and help maintain
mobility in mud, snow or sand. The electronic LTC then acts to
stabilise high speed vehicle behaviour under high cornering loads
or extreme manoeuvres.
If the traction control tell tale in the instrument panel is seen
to flicker, this is an indication that the LTC has been triggered and
electronic intervention is taking place; the tractive limit has been
reached and driving style should be modified accordingly.
WARNING: The enhanced vehicle control that these fea-
tures provide should not induce any relaxation of caution
or vigilance by the driver. Physical limits of cornering and
braking still apply, and excessive speed may result in loss of
control and an accident. The driver is at all times responsible
for the judgement of appropriate speed.
Traction Control 'Off' Button: In certain unusual circumstances,
such as loose surfaces, deep snow or when 'rocking' the vehicle
free from mud, it may be desirable temporarily to switch off the
LTC. An LTC 'off' button is provided on the gear lever shroud,
and should, with the ignition switched on, be held pressed for
2 seconds. The button tell tale will light up amber to confirm
system de-activation.
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