Thanks for replying Mark.

My Westy is a 1987.

I have been thinking about substituting a rheostat for the Temp II sender so
that I can control that variable. I could then  observe the O2 voltage as a
function of the TII voltage.  Perhaps more importantly I could observe the
drivability as a function of TII voltage.

Has anyone solved for the resistance of the TII sensor from the observed
voltage across it and correlated this with a water temperature measurement?

Joe

----- Original Message -----
From: "Mark Ingalls" <ingalls_mark@hotmail.com>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, May 01, 2001 5:07 AM
Subject: Re: Temp II voltages

>
> Hi Joe,
>
> What year van do you have?
>
> On my 85 the 02 sensor voltage sends out the default voltage signal of .5
> volts till something ( temp 2 ? )tells the ecu it is ready for closed
loop.
>
>
> Mine is obvious when it goes into closed loop, the .5 is switched to the
> real time 02 value and it cycles between .3 and .8 volt.
>
> Mark Ingalls
> 85 Gl
> 75 Bug
>
>
>
> _________________________________________________________________
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