Gilera 633721 Workshop Manual page 277

Nexus 500 euro 3
Connect the diagnostic tester.
Set the switch to "ON" with switch in "RUN" and
side stand raised.
Select the functions of the diagnostic tester on
«TPS RESET».
Specific tooling
020460Y Scooter diagnosis and tester
Make sure that the throttle valve with the control is
supporting the stop screw.
Guaranteeing that this position will be kept, send
a confirmation for the TPS reset procedure.
Select the "PARAMETERS" function and check
that the TPS reset "YES" is displayed.
Reset should be performed in the following cases:
- on first fitting.
- in case of replacement of the throttle body
- if the injection control unit is replaced.
N.B.
Injection
INJEC - 277