Editing Vehicle security system (section)

===Elise S2 After March 02===

Elise models built from approx. March '02, are fitted with a Cobra 8185 engine electronic
immobiliser meeting Thatcham category 2 requirements, but for enhanced theft and vandal
protection, the car can be specified with a Thatcham 1 category Cobra 8186 upgraded alarm
which includes cockpit intrusion sensing and a self powered siren.

Online User guide http://auto.manualsonline.com/manuals/mfg/cobra_electronics/8186.html

Immobiliser (8185 & 8186): In order to provide a measure of automatic vehicle security,
independent of any driver initiative, both 8185 and 8186 systems will ‘passively’ immobilise
the engine’s cranking and running circuits after the first occurring of the following
approximate time delays:

i) Four minutes after switching off the ignition.

ii) One minute after switching off the ignition and opening either door.

8186 Alarm System: As an optional upgrade, the Elise may be specified factory built with a Cobra 8186 vehicle security system which incorporates the following features:

- Ingress protection using sensing switches on both doors, both front body access panels, and the engine cover.

- Selectable cockpit intrusion sensing using a microwave sensor.

- Automatic (passive) engine immobilisation to prevent the engine from being started.

- Self powered siren to maintain protection if the vehicle battery is disconnected.

- '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.

- Personal protection by remote activation of siren.

The alarm will be triggered by any of the following actions:

- Opening a door, engine lid or front access panel;

- Movement detected within the cockpit;

- Energising the ignition circuit ('hot wiring');

- Interruption of the vehicle battery power supply.

The transmitter fobs are the same as used on Cobra 6422 (see above). 
Replacement transmitters are purchased un-coded, and are programmed to the car by the owner using a Personal Identification Number (PIN) supplied with the alarm.