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ENGINE 273 MPFI
LAMBDA (OXYGEN) SENSOR
Working Principle:
The sensor consists of an insulating tube made up of
a special ceramic material (catalyst) which is to be
heated by heater supply. It is placed into the exhaust
manifold. When heated above 350 °C, it delivers an
output signal between +100 mv (lean exhaust gas)
and +80 mv (rich exhaust gas).
The output signal (air to fuel ratio signal) of this sensor
is given to the ECU (as a function of varying air/fuel
ratio) for adjusting the injection pulse duration to
achieve the ideal air-fuel ratio.
Installation Details:
Installation angle must be maintained.
Tightening Torque: 40 - 60 Nm
Storage Conditions:
Storage Temperature: -40°C to +100°C. The technical
development of the sensor is aligned to a service life
of 1, 60,000 Km and a maximum life time of 10 years.
Pin Details:
Signal
ECU Connector Color
Pin No. Pin No.
Power Supply
-
1
White
(UBRMain Relay)
UpstreamOxygen
14
2
White
Heater
Oxygen Sensor(-)
31
3
Gray
Oxygen Sensor(+)
43
4
Black
Pin Configuration:
Type
LSF 4.2
Location:
Fitted between exhaust manifold and catalytic con-
vertor.