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 14 and PIN 2 of the sensor should be restored. If the engine 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 = 0, replace the sensor;
if resistance is correct, it means that the pink/black 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
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
ambient. It does not require an external supply
source but, in order to work properly, it should
reach a high operating temperature: that is why
there is a heating circuit inside.
Level in electrical circuit diagram:
Oxygen sen-
sor
Location:
•
sensor: exhaust pipe
•
Connector: near the probe
Electrical characteristics:
Heater circuit: 12 -14
Ω
at 20 °C (68 °F)
Pin-out:
Stelvio 1200 NTX MY11
Electrical system
ELE SYS - 113
Summary of Contents for Stelvio 1200 MY11 2011
Page 1: ...SERVICE STATION MANUAL B043090 Stelvio 1200 NTX MY11 ...
Page 4: ......
Page 6: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Page 54: ...INDEX OF TOPICS SPECIAL TOOLS S TOOLS ...
Page 61: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Page 72: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Page 133: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Page 146: ...INDEX OF TOPICS ENGINE ENG ...
Page 147: ...Gearbox Diagram key 1 Ball bearing Stelvio 1200 NTX MY11 Engine ENG 147 ...
Page 255: ...INDEX OF TOPICS POWER SUPPLY P SUPP ...
Page 267: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Page 295: ...INDEX OF TOPICS CHASSIS CHAS ...
Page 326: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Page 356: ...INDEX OF TOPICS BODYWORK BODYW ...