PIAGGIO 2005 XEVO 400ie, Руководство по ремонту

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- Make sure the seal rims on the coupling surfaces
between the manifold-throttle body and manifold-
head are in good condition.
CAUTION
IF AIR GETS IN IT CAN JEOPARDISE THE OPERATION OF
THE INJECTION SYSTEM, ESPECIALLY WHEN THE EN-
GINE IS IDLING.
- Make sure the throttle valve and related conduit
are clean.
- Make sure the supplementary air channel man-
aged by the Stepper motor is clean.
N.B.
IF THE THROTTLE BODY IS REPLACED RESET THE TPS.
Throttle body
after checking the material under warranty, several throttle bodies are replaced incorrectly because the
valve was dirty. Dirt deposited in the valve, mainly on the inlet manifold side, can be easily removed.
Once clean, the throttle body has and air flow equivalent to the original one. The throttle valve gets dirty
at variable periods according to the type of use given to the scooter, ambient conditions and the idle
speed set-up. The beginning of this problem can be easily detected because the idle speed gradually
decreases. An accurate diagnosis can be performed with the appropriate tools. The parameter situation,
with engine temperature at 90° minimum, can be the following:
Standard Throttle body dirty
Engine revs 1500±5 < 1400
Ignition advance 5°÷7° 10°
Throttle valve opening 5.24° 5.24°
The "rpm sensor" warning can be displayed on the error menu, in a stored status. This occurs only if
the engine stops several times with the key switch turned to « ON ».
Specific tooling
020680Y Diagnosis Tool
XEVO 400ie
Injection
INJEC - 193