VESPA GTS Super 125 i.e. Service Station Manual page 128

Injection
Terminals setup
1. Injection warning light
2. incomplete
3. incomplete
4. (-) lambda probe
5. (+) live battery
6. (+) battery
7. Immobilizer aerial
8. Electric fan remote control
9. Water temperature sensor
10.incomplete
11.(+) lambda probe
12.Engine stop switch
13.(+) engine rpm sensor
14.(-) fuel injector
15.(-) engine rpm sensor
16.Diagnostics socket output
17.Immobilizer LED
18.Pin short-circuited with pin 26
19.(-) low-beam automatic ignition
20.(-) injection load remote control
21.incomplete
22.(-) HV coil
23.incomplete
24.Start up enabling
25.incomplete
INJEC - 128
Vespa GTS Super 125 i.e.