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Excessive "anal"-lyzing without an understanding of how something actually works is an equation for frustration. I'd take the thing to a competent mechanic if I were you.

If you're going to just swap parts you might as well jack up the radiator cap. Is the sensor cross counting and if so at what average voltage? Can you drive the signal to min and max? Does it test OK off the car? Heater check out? Wiring back to the ECU good? Those things will either fix it or...

Turn the key on and ground the wire. The fans should come on. If they do that wire is supposed to connect to the single terminal sending unit on the *radiator* side of the T stat housing but if there's more than one terminal on it, it's not the correct one. Somebody will come along and put our...

Condenser fan. Assuming that's the right sender it connects to where it is now.

I did but after the guy who brought it back from the dead asked a question that was answered in the first and only post I decided to move on...

That's true because of the combo switch on the ground side but the other problem is there's no filaments in HID...

If you're asking about the sending unit the specs are in the manual.

>>the voltage going to the ecu from the hac is 3.04. does that sound about right for 6500 ft elevation<< As per the manual (you have one right?) it should be 3.6 vdc @ 750 torr, 2.8 vdc @ 540 torr, and 1.2 vdc @150 torr. Torr is mmhg with 0 msl being 760.

Huh. What part of "just plug it in" wasn't clear?

Just plug it in but why is your EGR missing? Someday the truth about all that will come out. Until then it makes for wonderful entertainment...

http://www.cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=076 Looking at that is it not obvious why they don't?

I could 'splain some things but instead here's an idea: why don't fix the code and see what happens. I mean, you're going to fix it anyway right?

The AC Amplifier needs to be gone.

In the interest of accuracy a couple of things: 1) Code 31 will not be related to a fault in the air temp sensor circuit. 2) Unless the associated electronics were also removed deleting AC components will not prevent a 51.

That feeling would be wrong. Try again. And stop focusing on resistance. The ECU doesn't deal in it.

This place never ceases to amaze me.

Don't feel bad. A lot of people have been doing it for a long time. Why I don't know.

Not that you're the only one who does it but, as I've said before, there is no "t" in Dexron...

The EGR doesn't work (what stops it from working) 1) when the engine is cold (vsv) 2) at idle (ported vacuum) 3 above about 4300 rpm (vsv) That said I r cornfuzed about how you can have a leak (one that beeps no less) between two parts that aren't connected...

Well, the box has to sink the injectors somehow. Point is our PCM does has drivers. It's been a long time since I was inside one so I don't remember whether they're FET, BJT, or even IGBT technology but I'm guessing MOSFET. Perhaps 3p will chime in to settle the matter.