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:
Lambda sen-
sor
Location:
•
Sensor: on the exhaust conducts
•
Connector: near the probe
Electrical characteristics:
Heater circuit: 12 -14
Ω
at 20 °C (68 °F)
Pin-out:
1. Sensor (black wire)
2. Sensor signal - (grey wire)
3. Heater ground connection (white)
4. Heater power supply (white)
NAVIGATOR: PARAMETERS
Lambda sensor
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 sensor 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%.
NAVIGATOR: ELECTRICAL ERRORS
Left lambda sensor P0130
- Shorted to positive.
Norge GT 8v
Electrical system
ELE SYS - 113
Revente Interdite - Revendita Vietata - Resaling Forbiden - Wiederverkauf Verboten