Smart Key stopped working, Wiring problem?

Today my smart key just stopped working on all the doors, but my FOB buttons work. Pushed the KEY button under the steering wheel on and off but it smart key still didn't work. Then... about 30 minutes later after driving home, the smart key system was up and running again.

I'm kind of thinking there is perhaps a loose wire in the dash. Sometimes I hear a faint knock in the dash (like a loose wire hitting something) when I'm driving. I have no idea where it is coming from.

Another reason I think this: sometimes I get a red triangle and the MFD just says "problem" but then it goes away after about 15 seconds and an icon shows up. (seems like this is just the HID leveling sensor gone bad)

Does anyone have an idea where to look? Does anyone know the wiring for the SKS? maybe I can find out what the problem is. Otherwise I have to take it to Toyota so they can vacuum my wallet

[I did do a search.]

 

12 volt was changed, and key fob battery is fine. Was changed less than 6 months prior.

 

By 12 volt was changed.. I meant it was changed about 3 months ago with no problem. And there was no interference with the key. It was in my pocket and not near a phone. And I tried it on all three doors.

 

I'm positive its not the battery. Its a newly manufactured optima. All other electronics of the car are working correctly and have had no issues.

 

Obviously, I used a spectrum analyzer. Doesn't everyone carry that wherever he or she drives? I don't know why you're so hung up on this. Also, am I somehow not answering your questions to your level of satisfaction?

I was in an enclosed garage, with no other cars around me. My cellphone was in neither of my pockets. I tried to use SKS on all three doors: driver, passenger, and the hatch.

I've also been in this garage before and used SKS with no issues. Now if someone could follow up with my question which was how the SKS wiring might be connected, maybe I could find out the issue.

 

If it appeases you, I can park in the same spot and re-test my SKS to see if it works or not. That is the only solution I can offer to you without a spectrum analyzer.

 

Thank you for your kind apology, although it would be less irritating if I were asked the correct questions to begin with. It is not fair to assume that posters will meet all of your expectations for information.

I am an engineer and a scientist as well. Keep in mind that you posted that I did not answer some of your questions, although your previous post was not in the form of a question.

ps. I am not trying to berate you, but as a person of intellect, I'm sure you can understand why I responded the way did, when somehow it was insinuated that I was not answering a question that was never asked.

 

Thanks for the info. I will let you all know if my batteries are failing.

 

I went back to the garage and re-parked in the same area. Same issue occurred. So good news, it looks like it's just a interference problem as qbee suggested.

As to your questions, 1: yes, 2: no, 3: no, 4: no i was not at home and I do not carry 2 fobs with me at all times, 5 was already answered in the first post.

 

Well I was on the 2nd underground level, but I seemed to be parked next to a utility room that was humming. Perhaps there is some sort of large electric motor running inside for utility purposes. I re-parked about 70 feet away and the issue was solved