VESPA GTS 250 I.E. Workshop Manual page 167

Vespa GTS 250 I.E.
- Fuel pump
- HV coil
- Injector
The control unit is provided with a self-diagnosis
system connected to an indicator light in the in-
strument panel.
Failures are detected and restored by the diag-
nostic tester.
In any case, when the fault is no longer present,
the data storage is wiped clean after 16 cycles of
use (cold start, running at normal engine temper-
ature, stop).
The diagnostic tester is also required for adjusting
the idle mixture.
Specific tooling
020460Y Scooter diagnosis and tester
The MIU injection-ignition system carries out
checks on the rpm counter and the electric fan for
radiator cooling.
The MIU control unit has a decoder for the anti-
theft immobiliser.
The MIU control unit is connected to a diagnostic
LED on the instrument panel, that also carries out
the deterrent flashing functions.
The MIU control unit power supply is furthermore controlled by the emergency switch; that is to provide
further safety for the scooter.
Injection
INJEC - 3