PIAGGIO 633929(IT) Service Station Manual page 211

MP3 125
With interface wiring disconnected from the control
unit, check the continuity between pin 34 and the
brown cable of the tilt locking gripper sensor con-
nector on the system side.
Check the continuity of the connector black cable
and an earth point on the chassis
Also check that the flexible transmission control
lever activates the limit stop switch properly.
TONE WHEEL SENSOR
1: Right tone wheel
2: Left tone wheel
Suspensions
SUSP - 39