Lotus 2004 ELISE Service Notes page 306

Lotus Service Notes
Component Location
The location of the PFK alarm components is unchanged from the equivalent earlier Cobra parts; the
controller is mounted on top of the scuttle beam at the LH extreme end. Access requires removal of the fascia
top. The immobiliser is incorporated into the controller as a single unit. The siren is mounted on the front of the
radiator duct LH extension, beneath the LHF turn lamp. Accessible only after removal of the front clamshell.
The microwave sensor is fixed to the cabin rear bulkhead, requiring removal of the rear bulkhead trim panel
for access.
CDL Module; The Central Door Locking module is different on PFK cars, but is mounted in the same position
as previously, on top of the scuttle beam at the RH extreme end. Note that this unit is specific to PFK cars, and
does not require the inverter relay (on underside of scuttle beam) for inertia switch operation of the CDL.
TYRE PRESSURE MONITORING SYSTEM (TPMS) - USA ONLY
All USA Elise/Exige models from '08 model year onwards are fitted with a tyre pressure monitoring system.
A sensor incorporated into each of the tyre valves monitors the air pressure inside the tyre, and supplies an
onboard control module with this data by radio transmission. If any tyre pressure should fall below 75% of the
recommended value, an alert message is sent to the instrument panel, and the tyre pressure tell tale
will light up amber. The fuel gauge display will then be overwritten with a message to indicate which tyre is
concerned, with text such as: LF Low (left hand front tyre low pressure). This message will show for 5 seconds
before the display reverts to the fuel level bar graph, but will repeat for 5 seconds at 30 second intervals.
The TPMS incorporates self-malfunction recognition, and if a fault is detected, the tell tale will flash for one
minute and then remain constantly lit. The LCD panel will also flash 'TPMS FAULT' for 5 seconds, and repeat
at 30 second intervals; no indication of low tyre pressure will be displayed.
Tyre fitters and service technicians should be made aware that TPMS is fitted, and that the tyre valves
include pressure sensors. If the emergency tyre inflator aerosol has been used, it will be necessary to renew
the tyre valve/pressure sensor. If a fault is indicated after wheel or tyre replacement, it is likely that a sensor
has been incorrectly fitted or damaged. If a tyre valve is renewed, or is moved to a different wheel position, the
TPMS will automatically identify the new configuration.
Note that the pressure sensors are powered by integral batteries, with an average service life of 10 years.
It is recommended to renew all pressure sensors at this time interval.
WARNING 'TELL TALE' LAMPS
The instrument panel tell tales and LCD functionality have been revised for '08 M.Y. New features are
described below:
Security Tell Tale
The security function is separated from the combined security/rpm tell tale and is moved into the face of
the speedometer.
High RPM Tell Tales
Three red tell tales are incorporated into the tachometer face to warn that maximum engine speed is being
approached. Maximum transient engine speed in all gears at normal running temperature, is 8,500 rpm (7150
rpm for Elise S), at which point the engine is governed, but as the rate of rpm increase is potentially greater in
the lower gears, the tell tale trigger points are tailored to accommodate the reaction time available. As maximum
rpm is approached, the tell tales will light in the following left to right sequence:
- one red light
- two red lights
- three rapidly flashing lights
When exploiting maximum acceleration, gearchange upshifts should be made immediately the three
flashing lights appear.
NOTICE:
- A 6,000 rpm limit is imposed on a cold engine to reduce possible damage and wear from an unsympathetic
driving style.
- At normal running temperature, maximum continuous engine speed is 8,000 rpm (6,800 rpm Elise S).
- Using maximum rpm and the above tell tale facility should be restricted to occasions when maximum ac-
celeration is required. Overuse will compromise powertrain service life.
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Section MP