APRILIA Tuono V4 1100 Factory 2021 Manual page 100

Electrical system
•
If open circuit: a too low current consumption was detected at PIN1/PIN10 of the instrument
panel connector.
•
If thermal protection: anomaly at the instrument panel.
•
If short circuit to negative: voltage equal to zero has been detected.
•
If short circuit to positive or short circuit between the two cables: excessive voltage has been
detected.
This error is indicated by flashing the general warning light and by lighting up in a fixed manner the MI
warning light.
Troubleshooting:
•
If open circuit: may be due to loose cables, in which case make sure that the cables are
stretched: if they are not, stretch them; if the cables are ok, perform the check procedure fro
the valve connector and for the instrument panel connector: if not ok restore; if ok, check
the continuity of the Brown/Green and Black/Red cables: if not ok, restore the wiring harness;
if ok, check the electrical characteristics of the engine and replace it, if necessary.
•
If thermal protection: replace the instrument panel.
•
If short circuit to negative: disconnect the valve connector and check with the key ON if there
is ground continuity at PIN 3 of the connector: if there is ground, disconnect the instrument
panel connector as well and if there is still ground, restore the Brown/Green cable and if
there is not, replace the instrument panel; if there is no ground, with key ON, check if there
is ground continuity at the connector PIN 2: if there is ground, disconnect the instrument
panel connector as well and if there is still ground, restore the Black/Red cable and if there
is not, replace the instrument panel; if there is no ground, check if PIN 3 or PIN 2 on the
motor have ground continuity: if they do, replace the motor.
•
If short circuit to positive or short circuit between the two cables: disconnect the instrument
panel connector and check with key ON if there is voltage on PIN 3 or PIN 2 of the connector:
if there is, restore the wiring harness; if there isn't, with key OFF and disconnecting the
exhaust connector as well, check if the two cables are insulated one from the other: if they
are not insulated, restore the wiring harness; if they are insulated, there is probably a short
circuit to positive that may be inside the motor or the instrument panel: it will be necessary
to try to replace one of the two components to identify which one of them is faulty.
P1503 Exhaust valve potentiometer
Electrical diagnosis:
•
short circuit to positive / short circuit to negative, open circuit.
Error cause:
•
Short-circuit to positive: excessive voltage has been detected on PIN 11 of the instrument
panel.
•
If short circuit to negative, open circuit: low voltage has been detected.
This error is indicated by lighting up in a fixed manner the MI warning light.
ELE SYS - 100
Tuono V4 1100 Factory