98 OBW Auto 211K. I am on the last things that need replacing and I jumped into this one. Every few months I would get a check engine light for low voltage on the TPS. I got one off Ebay and installed. Now I am reading I should have it tuned. It actually seems fine as is right now. Looks like it should be set at .45 and .55 on the multimeter. How does one take this reading? I know key should be on and throttle closed. Where do I stick the probes?

The FSM says to check voltage at the ECU connector. I don't recall which pin it is but you may be able to find it by searching.

I always wanted to check mine TPS setting as well. Sounds like PIA to take out the ECU. I did the adjustment on SVX and its much easier.

It's actually not that hard to get to. You pull off the kick panel on the passenger floor. There might be a push clip or two under the dash holding the carpet up, or there might not be, if there is pop them out with a trim tool, then peel the carpet back far enough to uncover the 3 or 4 bolts that hold the ECU cover plate on. I think they're 10mm. Remove the cover and voila.

You might have to diconnect the wire harness from the ECU to figure out which pin is which. When you find the corect one mark it, plug it back in and either strip back a bit of insulation or stick a thin test probe into the socket with the correct wire. Connect your VOM and turn the ignition key on. Make your adjustment, put the cover back, fold the carpet back, install push clips and the kick panel. Takes 10 - 15 minutes start to finish.