BMW 3 ELECTICAL SYSTEM Bedienungshandbuch PDF herunterladen (Seite 33)

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Index Data Technology Repairs Car care Controls Overview

Electronic vehicle immobilizer

The key to security

Your BMW is equipped with a passive

anti-theft system. This electronic immo-

bilization system is designed to reduce

the susceptibility of the vehicle to theft

by making it impossible to start the

engine using any means other than the

special keys furnished with the vehicle.

Your BMW center can cancel the elec-

tronic system authorization for individual

keys (in the event of loss, for instance). A

deactivated key can no longer be used

to start the engine.

463de042

How the electronics work

At the heart of this system is an elec-

tronic chip that is integrated into the

key. The lock mechanism itself is actu-

ally a dual-function device, simulta-

neously serving as a communications

interface designed to allow the security

system to maintain a continuous stream

of variable, vehicle-specific signals with

the electronic circuitry in the key. The

system will not release the ignition, fuel

injection and starter unless it recog-

nizes an "authorized" key.

Force applied to the key can dam-

age the integrated electronic cir-

cuitry. A damaged key can no longer be

used to start the engine.<

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BMW 3 ELECTICAL SYSTEM Bedienungshandbuch Seite 33