At 01:59 PM 9/26/2008, Jim Felder wrote:
>I'm about to take the car out for an errand. I'll disconnect the O2
>sensor and check the Temp II when I get back and it's warmed up. I
>just put a new Temp II in this morning, BTW.
>
>What's the procedure for testing it?

One lead should be ~0v (ground), the other should be ? couple volts ?
at room temp, maybe a tenth or so at running temp.  As I said, if
both leads zero you're not getting the pullup from the ECU; if both
leads ? 5v ? then open ground; if one zero and t'other +5 then open
sender.  Resistance btw (disconnected) sender terminals should match
the chart in Bentley.

If the ECU is seeing a continuous high voltage it will believe the
engine is dead cold and act accordingly.

--
David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage," '85 GL "Poor Relation"