PIAGGIO 2005 XEVO 400ie, Руководство по ремонту

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Throttle valve opening sensor
Throttle position sensor (t.p.s.)
Electric characteristic
TERMINALS: 1 - 22
CONDITIONS : Switch set to "ON"
STANDARD : 5 V
TERMINALS: 11 - 22
CONDITIONS : Opening the throttle gradually
STANDARD : Volt= Progressive increase
CIRCUIT LAYOUT
Specification Desc./Quantity
1 Electronic control unit
2 Valve position sensor
3 Fluid temperature sensor
4 Air temperature sensor
The throttle valve position sensor is not removable
and is installed on the throttle body.
This sensor receives a 5-V power supply from the
control unit and transmit a gradually increasing
voltage to the same, with an increase of the throttle
valve opening. The control unit converts this volt-
age at an angular position of the valve.
The engine rpm and the throttle valve position are
the two basic signals for the engine management.
A failure of this circuit causes the switching on of
the injection telltale light and the tripping of the
safeties. In these conditions, the engine works,
even though not in an optimum way, always safe-
guarding the catalytic converter integrity.
The throttle valve position signal is especially im-
portant at the small valve openings. These areas
are also where the sensor works more frequently,
and therefore they require more frequent checks
after a high number of kilometres run.
To check the sensor and related circuit, proceed
as follows:
1 - Connect the diagnostic tester.
Set the switch to " ON " with switch to " RUN " and
side stand raised.
Injection
XEVO 400ie
INJEC - 246