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ENGINE 1.3L QUADRAJET (90 PS)
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Lambda Sensor :
The Quadrajet 90 PS BS4 engine is fitted with Lambda sensor before closed coupled catalytic
converter.
Component Details :
The purpose of lambda Sensor is to maintain the NOx and PM particles. It strongly reduces the
variations of NOx and PM emissions in the entire life of a car.
Component Location :
Operational Description :
This sensor is having two porous platinum electrodes. The outer electrode surface is exposed to the
exhaust gases and is coated in a porous ceramic with the inner-coated surface exposed to fresh air. This
sensor produces a voltage when there is a difference in oxygen content between the two electrodes.
This signal is then sent to the ECU, which adjusts the mixture accordingly. The voltage range is
normally:
0.2 volts when there is a lean mixture
0.8 volts when there is a rich mixture.
Connection Description :
Lambda sensor K40 sends signals to pins 44, 45 and 47 of connector V of ECU while pin 46
supplies a reference earth. The coil is supplied by the line of fuse 15A and receives an earth signal from
pin 12 of connector V of control unit ECU.