|Upstream oxygen sensor|
|Upstream oxygen sensor (1350)
Location : The oxygen sensor is located in the exhaust line, between the engine and the catalytic converter .
The hydrocarbons are compared with the reference air contained in the oxygen sensor to deduce a mixture ratio .
Role of the injection ECU according to the data received :
To determine the fuel / air mixture (richness)
The oxygen sensor informs almost continuously the ECU about the air-fuel mixture ratio .
The "rich" or "weak" mixture information is given by 0 to 1 V voltages :
Weak mixture = 0,1 Volts
Rich mixture = 0,9 Volts
A heating device placed inside the sensor enables it to rapidly reach its operating temperature ( + 300 °C) .
The sensor is equipped with a 4 way caliper connector .
Allocation of the connector channels :
Channel 1 : +12 volts supply
Channel 2 : Oxygen sensor heating control
Channel 3 : - signal
Channel 4 : + signal
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|Info||Created: 22 September 2009
Last Updated: 22 September 2009