PIAGGIO MP3 400 i.e. Service Manual page 230

Injection
With wiring disconnected from the control unit and
connected to the system, check that the sensor
resistance between pins 13 - 15 is between 100
and 150 Ohm at an engine temperature of approx-
imately 20°
Disconnect the fuel pipe connector. Start up the engine and wait for it to stop. With the wiring connected
to the control unit and system try to start up the engine and check that the voltage between pins 13 and
15 is around 2.8 V
With the interface cable harness disconnected
from the control unit, check continuity between pin
13 and the red cable of the rpm sensor connector
and between pin 15 and the brown cable of the rpm
sensor connector
With the interface cable harness disconnected
from the control unit and the rpm sensor connector
disconnected, check that the red and brown cables
(pin 13 - 15) are isolated from each other and in-
sulated from the ground lead.
Specific tooling
020481Y Control unit interface wiring
020331Y Digital multimeter
INJEC - 34
MP3 400 i.e.