Specifications

the sensor; if it is not OK, replace the sensor; if it is OK, check continuity between PIN 14
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 Axone if the temperature indicated is plausible
in relation to the ambient 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
Lambda sensor
Function
It tells the control unit whether combustion 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 wiring diagram:Lambda Probe
Location:
•
Sensor: exhaust pipe
•
Connector: near the probe
Electrical characteristics:
Heater circuit: 12 -14 Ω at 20 °C (68 °F)
Pin-out:
Electrical system GRISO 8V - 1200
ELE SYS - 64
Revente Interdite - Revendita Vietata - Resaling Forbiden - Wiederverkauf Verboten