Gilera Nexus 500 Workshop Manual page 274

Injection
1 electronic control unit
2 Valve position sensor
3 Air temperature sensor
4 Fluid temperature sensor
The sucked air temperature sensor is installed in
the bottom side of the throttle body on the filter box
side.
The sensor is an NTC and has the same functional
layout as the coolant temperature sensor.
This signal is used to optimise the engine perform-
ance. Anyway, this data is less important than the
coolant temperature signal.
A failure of this circuit causes the control unit to
turn on the injection warning light and activate the
safety control, thereby ensuring the engine oper-
ation.
To check the sensor and related circuit, proceed
as follows:
1 - Connect the diagnostic tester.
Select the function "ERRORS" in the menu.
Check whether there are any indications regarding
the sucked air temperature sensor.
YES go to 3 NO go to 2
Specific tooling
020460Y Scooter diagnosis and tester
2 - The EMS system has received no indications of temperatures out of the range of possible values.
If you suspect a wrong temperature indication, proceed to perform the following check.
3 - Before checking the sensor and the relevant circuit, wait until the engine has cooled down and the
scooter has set to the working area temperature.
YES go to 4
4 - Set the switch to "ON" with switch to "RUN" and side stand raised. On the diagnostic tester, select
the «PARAMETERS» menu.
YES go to 5
5 - Check the following values:
coolant temperature
sucked air temperature
INJEC - 82
CIRCUIT LAYOUT
Specification
Nexus 500
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