Gilera 633721 Workshop Manual page 241

Nexus 500 euro 3
To connect the diagnostic tester, open the spark
plug inspection port and pull out the EMS Diagno-
sis socket. Remove the protection cap and con-
nect the tester terminal.
Power the diagnostic tester by connecting the ter-
minals to the battery poles, or the specific connec-
tor to the socket inside the gloves compartment.
Set the switch to "ON" and select the diagnostic
tester menu to the immobiliser function.
Scroll the pages to display the control unit data.
N.B.
AN UNPROGRAMMED SYSTEM CANNOT BE DETECTED UPON FIRST FITTING, OR IN CASE
THE DECODER AND THE CONTROL UNIT ARE REPLACED CONCURRENTLY.
The information will be as follows:
Unprogrammed control unit «ON»
Start-up disabled «ON»
Key number Zero › 250
Setting the circuit
The electronic ignition system is controlled by the control unit with the integrated Immobilizer system.
The immobilizer is an anti-theft system that allows the scooter to be operated only when it is started
with coded keys recognised by the control unit. The code is integrated into a transponder inserted into
the body of the key. This permits transparent operation for the rider who has to do no more than the
normal turn of the key. The Immobilizer system consists of the following components:
Injection
INJEC - 241