35. Immobilizer Aerial
Checks and inspections
Immobiliser
The electronic ignition system is controlled by the
control unit with the integrated Immobilizer sys-
tem. The immobiliser is an antitheft system which
allows the vehicle to function only if it is activated
by means of the coded keys that the control unit
recognises. The code is integrated in a transpond-
er in the key block. This allows the driver clear
operation without having to do anything other than
just turning the key. The Immobilizer system con-
sists of the following components:
- Control unit
- Immobilizer antenna
- master and service keys with built-in transponder
- HV coil
- diagnosis LED
The diagnosis led also works as a blinking light to
deter theft. This function is activated every time the
ignition switch is turned to "OFF" and it remains
active 48 hours so as not to damage the battery
charging process.
When the ignition switch is turned to "ON", it inter-
rupts the function of the immobiliser lamp and a
start enable lamp comes "ON".
The duration of the flash depends on the program-
ming of the electronic control unit
If the LED is off regardless of the position of the
ignition switch and/or the instrument panel is not
initiated, check if:
•
there is battery voltage
•
that fuse No. 1 and fuse No. 2 are in
good conditions.
Electrical system Vespa LX - S 125 3V ie 150 3V ie (2012)
ELE SYS - 78
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