Derbi Rambla 250 Manual page 169

Injection
With both the control unit and the injector discon-
nected, check the continuity of the Grey-Red cable
between pin 14 of the interface wiring and the in-
jector connector
Switch to "ON" and check there is voltage, with in-
jector disconnected and control unit connected,
between the Red-Brown cable of the injector con-
nector and the earth connection
With injector disconnected and the injector load
remote control disconnected, check the continuity
of the Red-Brown cable between the injector con-
nector and remote control base.
INJEC - 169