thoroughly inspected: In any case it is advisable to
use resistor spark plugs.
Diagnostic codes
The Immobilizer system is tested each time the ig-
nition key is turned from «OFF» to «ON». During
this diagnosis phase a number of control unit sta-
tuses can be identified and various light codes
displayed. Regardless of the code transmitted, if
at the end of the diagnosis the LED remains off
permanently, the ignition is enabled. If, however,
the LED remains on permanently, it means the ig-
nition is inhibited:
1. Previously unused control unit - key inser-
ted: a single 2 second flash is displayed, after
which the LED remains off permanently. The keys
can be stored to memory, the vehicle can be star-
ted but with a limitation imposed on the number of
revs.
2. Previously unused control unit - transpond-
er absent or cannot be used: the LED is on
permanently. In this condition no operations are
possible including the start up of the vehicle.
3. Programmed control unit - the service key in
(normal condition of use): a single 0.7-second
flash is displayed, after which the LED remains off
steadily. The engine can be started.
4. Programmed control unit - Master key in: a
0.7-sec flash is displayed followed by the LED re-
maining off for 2 sec and then by short 0.46-sec
flashes, the same number of times as there are
keys stored in the memory including the Master
key. When the diagnosis has been completed, the
LED remains permanently OFF. The engine can
be started.
5. Programmed control unit - fault detected: a light code is displayed according to the fault detected,
after which the LED remains on steadily. The engine cannot be started. The codes that can be trans-
mitted are:
Vespa LX - S 125 3V ie 150 3V ie (2012) Electrical system
ELE SYS - 81
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