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section
P 8
102 1098/1098S - M.Y. 2007 - edition 00
Electric system
8 - Immobilizer and transponder
The Immobilizer allows the vehicle to be started only if the rider uses the special ignition key which sends the identification code
to a decoder housed in the instrument panel. The transmission-receiving system is composed of a TRANSPONDER housed in
the ignition key heads and an antenna in the vicinity of the ignition switch.
Keys with transponder
The two black keys have the following characteristics:
- they contain the secret code used for programming the immobilizer and allowing the engine to be started;
- the key grip (which contains the electronic circuit for transmission of the secret code) can be removed and fitted to a different
blade if the motorcycle locks and ignition lock are changed;
The transponder is fitted inside the key grip and consists of a power supply circuit, a ROM (Read-Only Memory) and a
transmission circuit. The transponder is supplied with power by the magnetic field generated by the antenna which is enabled as
soon as the instrument panel is switched on. Since the transponder is very compact and needs no external battery power supply,
it is moulded permanently into the key grip.
Warning
The circuits in the key grips are not shockproof and may therefore be damaged by violent impact.
Immobiliser antenna
The antenna consists of a plastic-coated copper coil connected to a cable that is terminated with a connector.
The antenna (A) is fitted onto the cover (B) of the ignition lock, which is specifically modified for the purpose to create a seat in
which the antenna is inserted and engaged.
A
B
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