APRILIA DORSODURO FACTORY ABS 2011 Service Station Manual page 136

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Electrical system
air temperature sensor P0110 - open circuit, shorted to positive / shorted to negative.
Error cause
•
If the circuit is open, shorted to positive: excessive voltage has been detected at PIN 63 of
the ENGINE connector. If shorted to negative: voltage equal to zero has been detected at
PIN 63 of the ENGINE connector.
Troubleshooting
•
If the circuit is open, shorted to positive: check the sensor connector and the Marelli control
unit connector. If they are OK, check sensor continuity: replace the sensor if not OK; if it is
OK, check continuity between the ENGINE connector PIN 63 and the sensor PIN 1: restore
cable harness if there is not continuity; if it is OK, reconnect the control unit connector and,
with key set to key ON, check the continuity between the sensor connector PIN 2 and the
vehicle ground connection: if it is OK, it means that the error cause is that the cable is short
circuit to positive and it is necessary to restore the cable harness between the ENGINE PIN
63 and the sensor PIN 1; check the sensor connector and the Marelli control unit connector.
If not OK, restore the cable harness. If OK, check continuity between the ENGINE connector
PIN 35 and the sensor connector PIN 2: restore the cable harness if there is not continuity.
If there is, it means that the control unit does not supply the ground connection and therefore
should be replaced.
•
If shorted to negative, check sensor correct resistance: if resistance = 0, replace the sensor;
if resistance is correct, it means that the cable has ground connection: restore the cable
harness.
NOTES No error is detected if the sensor does not work correctly or the control unit connector
or sensor terminals are rusty: then check through Navigator if the temperature indicated is
plausible in relation to the ambient temperature. Check also that the sensor electrical charac-
teristics are observed: replace the sensor if not OK; if it is OK, check the sensor connector and
the Marelli control unit connector.
Lambda sensor
LAMBDA PROBE
Function
In charge of telling the control unit whether the
mixture is lean or rich.
Operation / Operating principle
The Marelli injection control unit reads and inter-
prets a voltage generated by the difference in oxy-
gen content between the exhaust fumes and the
ELE SYS - 136
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DORSODURO FACTORY ABS