Gilera 633721 Workshop Manual page 244

Injection
If a service key becomes uncoded, the efficiency
of the high voltage circuit shielding must be thor-
oughly inspected: In any case it is advisable to use
resistive spark plugs.
Characteristic
MASTER key:
BROWN KEY
SERVICE key.
BLACK KEY
Checking master-box data
Connect the diagnostic tester.
Set to «ON» and select the immobilizer function.
Scroll the pages the find the data.
Specific tooling
020460Y Scooter diagnosis and tester
The information will be as follows:
- Unprogrammed control unit «OFF»
- Start-up disabled «OFF»
- Number of keys 2*
*The number denotes how many keys have been used for programming, master key included.
Resetting the circuit
1 Replacing the small cylinder
- Remove the original master key transponder and install it on the master key of the new cylinder.
- Program the system again as described above.
2 Decoder replacement
When the decoder is replaced it is necessary to program the system again.
Programming is indispensable for the engine start-up. (see System programming).
3 Control unit replacement
Programming is indispensable when the control unit is replaced to enable the engine start-up.
In this case it is sufficient to switch to "ON" using the master key.
N.B.
- THE SERVICE KEY (BLACK-COLOURED) IS NOT USED FOR PROGRAMMING.
INJEC - 244
Nexus 500 euro 3