APRILIA RSV4 RR 2017 Service Station Manual page 211

RSV4 RR-RF
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If the potentiometer signal is above the maximum threshold: a voltage of the maximum limit
stop (open valve) was detected outside the established range.
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If the potentiometer signal is under the minimum threshold: a voltage of the minimum limit
stop (closed valve) was detected outside the established range.
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If excessive duration: an excessive duration for the stopper search (potential mechanical
problem of he valve, of the motor or cables not connected) was detected.
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If research not performed: this symptom may be caused is a new instrument panel is fitted
and the stopper self-learning has not been yet performed, if the stroke between minimum
and maximum is too short or too long.
This error is indicated by lighting up in a fixed manner the general warning light.
Troubleshooting:
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If the potentiometer signal is above the maximum threshold: during the "Exhaust valve self-
learning" setting, a maximum opening limit stop voltage was detected outside the estab-
lished range. Check the correct voltage of the two cables of the valve.
•
If the potentiometer signal is under the minimum threshold: during the "Exhaust valve self-
learning" setting, a minimum opening limit stop voltage was detected outside the established
range. Check the correct voltage of the two cables of the valve.
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If excessive duration: check if the valve cables are energised: if they are not energised,
energise them; if ok, check if the mechanical rotation of the exhaust valve occur without
friction or delays: if not ok, restore the normal valve rotation; if ok, check the electrical char-
acteristics of the motor: if not ok, replace the motor; if ok, perform the check procedure for
the valve connector and for the instrument panel connector (with special attention to any
signs of oxidation): if not ok restore; if ok, replace the electric motor. Also check the state of
the cables.
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If research not performed or incorrect stroke: perform the "Exhaust valve self-learning" pro-
cedure if the stoppers learning has not yet been performed after the installation of the new
instrument panel. If the instrument panel is not new, check if the calibration of the cable is
correct and if it is correct, check that there is no obstacle to the valve rotation.
CAUTION
AFTER EACH MAINTENANCE OR CHECK OPERATION AT THE EXHAUST VALVE, PERFORM
THE "EXHAUST VALVE CABLES CLEARANCE ADJUSTMENT" PROCEDURE.
P1502 Exhaust valve engine DC error
Electrical diagnosis:
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open circuit, thermal protection, short circuit to negative, short circuit to positive or short
circuit between the two cables.
Error cause:
Electrical system
ELE SYS - 211