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Re: Reorted O2 volts
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/