PIAGGIO 500 cc Service Manual page 197

Disconnect the TPS connector.
Check the continuity between the connector
terminals and related pins on
the control unit side.
Light blue-green-22 = 0 Ω (continuity)
Brown-yellow-1 = 0 Ω (continuity)
Orange-light blue-11 = 0 Ω (continuity)
YES
Check the earthing isolation of the
three circuit wires.
22-23 = Ω infinity (>1MΩ)
1-23 = Ω infinity (>1MΩ)
11-23 = Ω infinity (>1MΩ)
YES
Connect the special tool 020481Y to
the control unit.
Set ignition to "ON" with switch in position "RUN"
and side stand raised.
Reset or replace the fuel injection harness.
Reset or replace the fuel injection harness.
Fuel injection
NO
NO
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