Gilera 633721 Workshop Manual page 209

Nexus 500 euro 3
4 - Switch in «ON» position Emergency switch on
«RUN».
Side stand up Wait more than 5 seconds.
15 - 23 = battery voltage
YES go to 5 NO go to 6
5 - Check the CPU connector. Check the electronic
control unit.
6 - Check the continuity between pin 15 of the ECU
and pin 17 of the connector 20 input connector of
the instrument panel.
The injection ECU manages the negative of the light. The light must go off after the initial check. The
light goes on again when the ECU self-diagnosis detects a fault. When the fault disappears the light
goes back off, however, the related operating tests need to be carried out. The light can go on whether
the engine is able to run or not.
Self-diagnosis system
The injection control unit is provided with an auto-diagnosis function.
When a failure is detected, the control unit:
- turns on the injection telltale light (only when it is current).
- enables the engine management check according to the data entered in the control unit (where pos-
sible).
- stores the failure (always).
In the event of intermittent failures, the indicator follows the failure trend and storage remains active.
Stored data are automatically deleted when the failure does not occur for over 16 usage cycles of the
scooter (heating - use - cooling). The battery disconnection does not delete stored data.
Injection
INJEC - 209