Lotus Elise S1 Service Notes page 403

I Lotus Service Notes
Section JH
MN.12 - COBRA 6422 VEHICLE SECURITY ALARM (U.K. option)
The optional upgraded vehicle alarm system on U.K. market cars was updated from a Cobra 6019HF to
a Cobra 6422 based system from the following change point:
VIN; W 1947 (October'97); plus W 1938
The 6422 system meets Thatcham 'Category One' standards pertinent to the U.K. insurance industry and
operates in much the same way as the previous, 6019HF system (which also qualified for category one), but
significant differences include:
New, ergonomic, transmitter key;
Deletion of override switch on siren housing;
Facility to programme new transmitter keys. Special note should be taken of the potential for
inadvertent transmitter code wiping, possible when using the touch key (which is only required in case of
transmitter key loss or failure). Code wiped transmitters may be subsequently re-programmed by the owner -
see later.
The following instructions for use are based on those provided in the Owner's Handbook:
Upgraded Vehicle Security Alarm (if fitted)
In order to provide an exceptional level of theft and vandal protection, the Lotus Elise may be factory
fitted with a vehicle security alarm incorporating a Cobra 6422 system. Features include:
Ingress protection using sensing switches on both doors, front bonnet and engine lid.
Selectable cockpit intrusion sensing using a hyperfrequency radar sensor.
Automatic (passive) engine immobilisation to prevent the engine from being started.
Self powered siren to maintain protection if the vehicle power supply is interrupted.
'Dynamic coding' of the transmitter keys; Each time the transmitters are used, the operating frequency is
randomly changed to guard against the possibility of code copying.
Transmitter Keys
Two transmitter keys are provided with the car, together with two electronic touch keys. The transmitter
key is used to arm and disarm the alarm and to deselect the intrusion sensor. The touch key is provided as a
safety back up in case of transmitter key failure (e.g. flat battery), and should be kept separate (i.e. not on the
same keyring), but readily available. Note that misunderstood use of the touch key can result in the transmitter
key codes being wiped (see later).
Arming the Alarm
Remove the ignition key, close and lock both doors, and check that the engine lid and front bonnet are
shut. The roof may be either raised or stowed. Press once, the larger of the two buttons on the transmitter key.
This command will be acknowledged by:
Two flashes of the hazard warning lamps;
Flashing of the alarm tell tale in the instrument pod.
Check that these indications occur. If not, press the button a second time, as the first press may have
switched off the passive immobilisation (see later).
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