Configuration And Circuit Diagram
The basic principle of the operation of titania sensor is that, when the oxygen concentration from the exhaust emission manifold reduces (RH), the volume of O2 and the electronic concentration value will increase to make the titania element resistance reduce and, reversibly, when the oxygen concentration increases (leaner), the resistance will increase. Accordingly, the ohm value of above 100 kΩ is regarded as corresponding leaner condition and the value below 100 kΩ as richer condition.
The main point to check the oxygen sensor output function is to check the output voltage for being 0.1-0.9V and the frequency 1.1 Hz at the engine rate of 3000 RPM after full warming up.
The point of service is to check that the frequency is about 1.1 Hz while checking the output is also important.