Testing Heated Oxygen Sensor ?

Heated Oxygen Sensor
OPERATION
TESTING

 Details are as follows :----

Operation

The heated oxygen sensor supplies the PCM with a signal which indicates a rich or lean condition during engine operation. The input information assists the computer in determining the proper air/fuel ratio. A low voltage signal from the sensor indicates too much oxygen in the exhaust (lean condition) and a high voltage signal indicates too little oxygen in the exhaust (rich condition).

The sensors are threaded into the dual converter Y-pipe. Heated oxygen sensors are used on all models to allow the engine to reach the closed loop state faster.

Heated oxygen sensors are located in the dual converter Y-pipe both before and after the catalyst.

Testing

1. Disconnect the HO2S.
2. Measure the resistance between PWR and GND terminals of the sensor. Resistance should be approximately 6 ohms at 68°F (20°C). If resistance is not within specification, the sensor's heater element is faulty.
3. With the HO2S connected and engine running, measure the voltage with a Digital Volt-Ohmmeter (DVOM) between terminals HO2S and SIG RTN (GND) of the oxygen sensor connector. Voltage should fluctuate between 0.01-1.1 volts. If voltage fluctuation is slow or voltage is not within specification, the sensor may be faulty.

This will help.

Thanks.

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Car repair guide?

http://technoanswers.blogspot.in/2012/03/car-repair-guide.html