Mirage L4-1468cc 1.5L SOHC 12 Valve (1996)
Oxygen Sensor: Description and Operation
DESCRIPTION
The heated oxygen sensor functions to detect the concentration of oxygen in the exhaust gas; it converts those data to voltage, and inputs the
resulting signals to the engine control module.
If the air/fuel mixture ratio is richer than the theoretical air/fuel mixture ratio (i.e., if the concentration of oxygen in the exhaust gas is sparse), a
voltage of approximately 1v is output; if the air/fuel mixture ratio is leaner than the theoretical air/fuel mixture ratio (i.e., if the concentration is
dense), a voltage of approximately O V is output.
The engine control module, based upon those signals, regulates the amount of fuel injection so that the air/fuel mixture ratio becomes the
theoretical air/fuel mixture ratio.
OPERATION
Battery power supply is applied, by way of the MFI relay, to the heated oxygen sensor heater. As a result, the sensor element is heated by the
heater, so that the heated oxygen sensor shows excellent response even if the temperature of the exhaust gas is low.
