Re: Reorted O2 volts

[Ludis Langens <ludis@cruzers.com>]

Bob Valentine wrote:
> 
> Reading a '91 Cavalier shop manual, it says that the ECM supplies .450
> volts on the 02 sensor wire; this contradicts everything I've read since I
> thought you NEVER apply any voltage [even current limited] to the 02....

Yes, the ECM applies a tiny bit of current to the O2 sensor.  The
NatSemi LM9044 O2 amp typically applies 380 nanoAmps to the O2 signal
wire.  The O2 ground wire typically gets 65 microAmps.

-- 
Ludis Langens                               ludis (at) cruzers (dot) com
Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
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