Air Temperature Sensor - MOTO GUZZI Stelvio 1200 NTX Service Manual

Electrical system
•
If the circuit is open, shorted to positive: check the sensor connector and the Marelli control
unit connector. If they are not OK, restore the cable harness; if OK, check the continuity of
the sensor; if it is not OK, replace the sensor; if it is OK, check continuity between PIN 5 of
the BROWN connector and PIN 2 of sensor: 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 1 and the vehicle ground connection: if there
is not continuity, restore the cable harness; if there is continuity, it means that the cause of
the error is that the cable is shorted to positive and now the cable harness between the
BROWN PIN 5 and PIN 2 of the sensor should be restored. If the air temperature sensor
error is displayed at the same time, this means that the grey cable common for both sensors
is shorted to positive.
•
If shorted to negative, check sensor correct resistance: if resistance is null, replace the sen-
sor; if resistance is correct, it means that the orange 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 Axone if the temperature indicated is plausible
in relation to the engine temperature. Check also that the sensor electrical characteristics are
observed: replace the sensor if not OK; if it is OK, check the sensor connector and the Marelli
control unit connector

Air temperature sensor

Function
It tells the control unit the intake air temperature in
order to calculate oxygen presence so as to opti-
mise the petrol quantity necessary for correct com-
bustion.
Operation / Operating principle
NTC type sensor (resistance sensor, inversely
variable with temperature).
Level in wiring diagram:Temperature sensors
Location:
•
sensor: on filter casing
•
connector: on the sensor
Electrical characteristics:
1 Resistance at -40 °C (-40 °F)
Revente Interdite - Revendita Vietata - Resaling Forbiden - Wiederverkauf Verboten
ELE SYS - 66
A
IR TEMPERATURE SENSOR RESISTANCE
Specification
STELVIO 1200 NTX
Desc./Quantity
100.950 kOhm