it could be illegal since if you do get pulled over by cops, they might think you're trying to scam the odometer. If its just for a day or two, go for it. If not, i'd rather be safe than sorry.
the odo problem is a good point.
other than that you'll be fine--although it will still be illegal you shouldnt have a problem unless your pulled over.
odo fraud is a big offense though--more so than driving without the rest of your instrument panel.
BUT the celicas odo is electric (not analog) so if the ecu for our cars keeps that info then it wouldnt be fraud. i'm not sure how our cars odo's work but i would bet that the ecu keeps track of the mileage--not the digital display itself.
perhaps you'll be ok
actually, it's stored in the gauge cluster, not the ecu.
it's fine to drive like that other than legal reasons, and when you plug it back in, you might have a check engine light, so just reset your ecu and you'll be all good.
Are you sure that it's stored in the gauge cluster, because it would be really easy for people to committ ODO fraud if that was true.
I know that it's not stored in the ECU because people get those swapped all the time.
Anyways, I have a feeling that this thread might be closed for some certain legal reasons, but I have my cluster out now, and I was wondering the same thing because I need to buy some soldering tools, and I don't feel like puttting my cluster back in, and then taking it out again. I'm lazy.