SHERCO 2012 SE 250i-R, Shop Manual, Page: 42 / 55

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SHERCO diagnostic tools
Your Sherco 250i/300i/450i/510i is equipped with a Magneti Marelli fuel injection system. This
system consists of a computer (ECU), an injector body, a fuel pump and various sensors (air
pressure, air temperature, engine temperature and butterfly position sensor). To perform the
diagnosis you must install the Sherco Vehicle Diagnostic Scan Tool Software (VDSTS).
SHERCO reference R471. This software does not change the fuel injection map. This is only a
diagnostic tool.
Num Designation Emplacement
1 Housing ECU+ atmospheric pressure sensor Above the engine under the main frame.
The sensor is built into the ECU box.
2 Butterfly position sensor (TPS) On the right side of the injector body
3 Air temperature sensor At the top and back of the air box
4 Water temperature sensor At the rear of the cylinder head
5 Engine speed sensor Upper Ignition crankcase
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