PIAGGIO MP3 400 i.e., Service Manual, Page: 75 / 394

Diagnostic code - 3 flashes
The three-flash code indicates a system where the
control unit does not recognise the key. Turn the
switch to ON using several keys: if the error code
is repeated even with the Master key, replace the
control unit. If this is not the case, perform a re-
programming.
Battery recharge circuit
The recharge system is provided with a three-phase alternator with permanent magneto flywheel.
The alternator is directly connected to the voltage regulator.
This, in its turn, is connected directly to the ground and the battery positive terminal passing through
the 30A protective fuse.
The three- phase generator provides good recharge power and at low revs, a good compromise is
achieved between generated power and idle stability.
Stator check
Stator winding check-up
WARNING
THE CHECK-UP CAN BE MADE WITH THE STATOR PROPERLY INSTALLED.
1 Remove the right side panel.
2) Disconnect the connector between stator and regulator with the three yellow cables as shown in the
photograph.
3) Measure the resistance between each of the yellow terminals and the other two.
Electric characteristic
Resistance:
0.2 - 1
Ω
MP3 400 i.e.
Electrical system
ELE SYS - 23