Derbi Rambla 250 Manual page 180

Injection
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 Axone following the specific instructions.
Shift to «ON».
Press the + and - keys go to the adjustable parameters screen and select «TPS RESET» parameter.
Specific tooling
AP8140595 Axone + battery charger (230V 50Hz)
AP8202311 Axone + battery charger (110V 60Hz)
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.
INJEC - 180