APRILIA SCARABEO 500 - 2008, Service Station Manual

Page: 259 / 324

After the pre-calibration the throttle body has an open valve with a variable angle depending on the
tolerances of the machining of the pipe and the valve itself.
The valve position sensor can also have various fitting positions. For these reasons the mVs of the
sensor with the valve at idle can vary from one throttle body to another.
To obtain the optimum carburetion, especially at small openings of the throttle valve, it is essential to
match the throttle body with the control unit following the procedure known as TPS resetting.
With this operation we inform the control unit, as a starting point, of the mV value corresponding to the
pre-calibrated position.
To reset, proceed as follows.
Connect the diagnostic tester.
Shift to « ON ».
Select the diagnostic tester functions on « THROT-
TLE POSITION AUTODETECTION ».
Make sure that the throttle valve control is in con-
tact with the stop screw.
Guaranteeing that this position will be kept, give the confirmation for the TPS reset procedure.
Reset should be performed in the following cases:
- on first fitting.
- if the injection control unit is replaced.
NOTE
THE TPS RESETTING PROCEDURE MUST NOT BE CARRIED OUT WITH A USED THROTTLE
BODY BECAUSE POSSIBLE VALVE WEAR AND STOP WEAR FOR THE MINIMUM OPENING
MAKE THE AIR FLOW DIFFERENT FROM THAT OF THE PRE-CALIBRATION.
SCARABEO 500
Injection
INJEC - 259