Oxygen Sensor - SSANGYONG Y200 Manual

1F1-70 M162 ENGINE CONTROLS
The oxygen sensor is unique among the engine control
sensors because is acts like a battery and is able to
generate its own low voltage signal. It is located the
exhaust system and monitors the amount of oxygen in
the exhaust stream and provides feedback to the
Engine Control Module (ECM).
The electrically heated oxygen sensor warms up quickly
and remains hot, even at idle when the exhaust manifold
may cool down.
The ECM applies a reference voltage of 450 mv to the
oxygen sensor, the ECM compares this reference
voltage with the voltage generated by oxygen sensor.
The amount of voltage the oxygen sensor generates is
proportionate to the difference between the amount of
oxygen in the outside air and the exhaust gases. The
atmosphere contains about 21% oxygen. The exhaust
from a rich air/fuel ratio contains almost no oxygen.
With a large difference between the amounts of oxygen
containing the two surface, the sensor generates less
voltage.

OXYGEN SENSOR

When the exhaust gas is rich (below 14.7:1), the voltage
output is high, above450mv. When the exhaust gas is
lean (above 14.7:1 air/fuel ratio), the sensor's voltage
output is low, below 450 mv.
The ECM uses oxygen sensor information for:
•
Open loop / closed loop criteria
•
Ideal air / fuel ratio
YAD1F570
YAD1F580
SSANGYONG Y200