Lambda Sensor - MOTO GUZZI Stelvio 1200 NTX ABS Service Station Manual

Electrical system

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:
1. Sensor signal + (black wire)
2. Sensor signal - (grey wire)
3. Heater ground connection (white)
4. Heater power supply (white)
AXONE: PARAMETERS
Lambda probe
Example value: 0 - 1000 mV
If there is a short circuit at + 5 V or above, the value read is approx. 5.000 mV. If there is a short circuit
to ground instead, the value read is equal to 0 mV and the Lambda Sensor Correction parameter shows
25%: no error is displayed, though.
Lambda sensor correction
example value: 1.00
In closed loop, the value must be close to 0 % (values not within the +10 % and -10 % range may
indicate a fault): In an open circuit, the lambda probe signal is too low. Therefore, the control unit takes
it as a lean mixture condition and will try to enrich it. The value read will be +25%.
AXONE: STATUSES
Lambda check
Example value: Open loop / Closed loop
Revente Interdite - Revendita Vietata - Resaling Forbiden - Wiederverkauf Verboten
ELE SYS - 70
Stelvio 1200 NTX ABS