VESPA GTS Super 125 i.e. Service Station Manual page 75

Vespa GTS Super 125 i.e.
Remove the connector support bracket shown in
the photograph and disconnect the connector from
the control unit. Check the following conditions:
With the key switch set to OFF:
• there is battery voltage between terminals 6-26
and terminal 6-frame earth (fixed power supply). If
there is no voltage check that fuse 4 and its cable
are in working order.
With the key switch set to ON:
• there is battery voltage between terminals 5-26
and terminal 5-chassis ground (fixed power sup-
ply). If there is no voltage, check the ignition key
contacts, that fuse 2 and its cable are in working
order.
•
There is continuity between terminals
12-18 and 12-19 with the emergency
cut-out switch in the RUN position. If
there is no continuity, check the con-
tacts of the latter.
If no faults are found, replace the control unit.
THE FOLLOWING INFORMATION REFER TO THE VERSION EQUIPPED WITH MIU G3 ECU.
The electronic ignition system is controlled by the control unit with the integrated Immobilizer system.
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 transponder in the key
block. This allows the driver clear operation without having to do anything other than just turning the
key. The Immobilizer system consists of the following components:
- Control unit
- Immobilizer antenna
- master and service keys with built-in transponder
- H.V. coil
Electrical system
ELE SYS - 75