PIAGGIO 500 cc Service Manual page 178

Fuel injection
YES
Install the connection harness between the control
unit and the fuel injection system. Tool 020481Y.
See page 9-8
Do not carry out connection with the control unit.
Disconnect the connection between the phase-
revolutions sensor and the fuel injection system.
Measure the resistance of the sensor
connecting the multimeter between
+ k k -
the terminals marked and .
Phase-revolution sensor resistance =680 Ω±15%
YES NO
Check the earthing isolation between one pole and Replace the revolutions
the shielding. sensor.
k + k
- = infinity (>1MΩ)
S
NO
YES
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