APRILIA TUONO V4 R 2010 Service Station Manual page 201

TUONO V4 R
Exhaust butterfly valve
•
Indefinite/in research/activation with key ON/ in operation/stopped for detected malfunction/
research of zero position.
NOTE: If there is no problem, it appears: in operation
DIAGNOSIS INSTRUMENT: ELECTRICAL ERRORS
Exhaust butterfly valve stop research P0191
•
potentiometer signal above maximum threshold/potentiometer signal below minimum
threshold/excessive time/research not carried out or wrong stroke.
Error cause
•
If potentiometer signal is above maximum threshold: voltage of the maximum end of stroke
position (open valve) outside the foreseen field has been detected. If potentiometer signal
is below maximum threshold: voltage of the minimum end of stroke position (closed valve)
outside the foreseen field has been detected. If time is excessive: excessive time for stop
search has been detected (possible mechanical problem of the valve, of the motor or cables
not connected). If research has not been carried out or wrong stroke: this symptom may be
caused when a new instrument panel is installed and the stop self-acquisition procedure is
not carried out or if the stop between minimum and maximum is too short or too long.
Troubleshooting
•
If potentiometer signal is above maximum threshold: during adjustment "Exhaust butterfly
valve self-acquisition", voltage of maximum opening end of stroke outside the foreseen field
is detected. Check correct tensioning of the two valve cables.
•
If potentiometer signal is below maximum threshold: during adjustment "Exhaust butterfly
valve self-acquisition", voltage of minimum opening end of stroke outside the foreseen field
is detected. Check correct tensioning of the two valve cables.
•
If time is excessive: check that the valve cables are in voltage: if they are not in voltage, fix
them; if they are OK, check that mechanical rotation of the exhaust butterfly valve is without
friction or deceleration: if they are not OK, restore normal valve rotation; if they are OK, check
motor electrical characteristics: if they are not OK, replace the motor; if they are OK, check
valve connector and instrument panel connector (with special attention to possible oxida-
tion): if they are not OK, restore; if they are OK, replace the electrical motor. Or also free
cables.
•
If research has not been carried out or wrong stroke: adjust "Exhaust butterfly valve self-
acquisition" if the stop self-acquisition procedure has not been carried out after installation
of new instrument panel. If the instrument panel is not new, check correct calibration of the
cables and if correct, check that there is not an obstacle for correct rotation of the valve.
Exhaust valve engine P0192
Electrical system
ELE SYS - 201