Testing O2 sensor

09-25-2003, 09:48 PM

yal

Benz-smart

Join Date: Oct 1999

Location: New York, Long Island

Posts: 2,707

Testing O2 sensor

I found the following quote in an old thread by Barrie. What does he mean by "shorting the input"?

Quote:

Testing Sensor Element: measure the output voltage of the sensor ceramic (black wire) under full-rich conditions; create this condition by shorting the input to the ECU (green wire). Specified tolerance is 0.45 - 1.0 VDC. Mine measured 0.48, suggesting that the ceramic element is getting weak.

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