VESPA 946 E4 EMEA 2021 Manual page 206

Injection
TO INDICATE THE RELAY OF THE DESIRED FUNCTION,
REFER TO THE PIN-CABLE COLOUR RELATIONSHIP
WITH THE ATTACHED ELECTRIC SYSTEM DIAGRAM.
Check the power supply line of the injection load
relay energising coil: after switching to "ON", make
sure there is battery voltage, for 2 seconds, be-
tween the Orange-Blue cable and Black-Purple
cable of the solenoid base. Otherwise check the
continuity of the Orange-Blue cable between the
fuse-box and the relay base and of the Black-Pur-
ple cable between pin 22 of the control unit and the
relay base.
N.B.
CONTINUITY TESTS MUST BE CARRIED OUT WITH THE
COMPONENTS DISCONNECTED. (RELAYS, CONTROL
UNIT, FUSES ETC.).
Check the presence of fixed voltage between the
Red-White cable of the relay base and ground.
Otherwise, check the continuity of the Red-White
cable between the fuse-box (No. 02 10 A) and the
relay base.
N.B.
CONTINUITY TESTS MUST BE CARRIED OUT WITH THE
COMPONENTS DISCONNECTED. (RELAYS, CONTROL
UNIT, FUSES ETC.).
See also
Fuses
Check, on switching to "ON", that there is battery
voltage, for about two seconds, to the Black-Green
cable of the pump connector and ground with
pump connector disconnected. Otherwise, check
the continuity of the Black-Green cable between
the pump connector and the relay base.
Check the efficiency of the ground line of the fuel
pump by measuring the continuity between the
pump connector black cable, system side, and the
ground.
Specific tooling
020331Y Digital multimeter
INJEC - 206
Vespa 946 E4-E5 EMEA-USA-ASIA (2021-)