SKS proximity functions not working

I just had new tires and TPMS sensors installed on my 2006 Prius. When they brought the car out of the bay, the fob was in the slot on the dashboard (as is normal after someone else works on it) and the car was running, so I just drove home that way. It wasn't until next day when I discovered the SKS proximity functions weren't working, for the first time in all these years (I'm the original owner of the car).

I assumed it had just been turned off via the button on the dash under the steering wheel, which is next to the Set TMPS switch. But no amount of turning it off and on has restored the proximity functions. It isn't the battery on the fob; the remote lock/unlock still works from over 30 feet away. Unfortunately, this is the only fob I still have.

Is there anything I can do short of bringing it to a dealer to try to turn the SKS proximity functions back on? It was working fine prior to the tire and TPMS sensor change. Thanks for any words of wisdom!

 

Actually, they couldn't program the new TPMS sensors at all because their tool wasn't working (they warned me in advance, so I was already expecting to have to return at some point to get that done). But there's a button under the steering wheel next to the SKS "Key" button labeled "Set" which, as I understand it, tells the TPMS system to recognize the current tire pressures as "normal". I assume they might have tried that "Set" button, and accidentally pressed the "Key" button that turns SKS proximity sensing off and on. By proximity functions I mean both unlocking the doors automatically with the fob in my pocket and starting the car, also with the fob in my pocket. Those functions have always worked in the past, and neither do now. The remaining fob I have is an original one for this car, in good physical condition and in its original case. Everything worked normally when I drove to my tire appointment, and it hasn't worked since, so there almost has to be some connection. But regardless of how it happened, I'm just trying to regain the lost functionality at this point. Thanks!

 

Oh, and I don't have access to the Toyota software, unfortunately. I was just assuming the toggle button that turns the SKS proximity functions off and on might have been pushed, but putting it in the "on" position (button out, vs. "off" which is button in) doesn't seem to help.

 

UPDATE: I have good news and unsatisfying news. The good news is it's working again. The unsatisfying bit is I'm not exactly sure why. I played some more with turning the SKS Key button off and on, and just for the heck of it, I tried toggling the button state with the car off, with it in ready mode (fob inserted in dash), and with it running (also fob in dash). I tried several permutations. Suddenly, it was working again. I have no reason to believe (based on what I've read here and elsewhere online) that any of those things should matter, and probably they didn't. Maybe the switch (button) itself needed to be pressed a number of times because something was "stuck", if that makes any sense at all. I really can't say, but of course I'm happy SKS proximity functions are working again. Thank you to all who responded!

 

Yes, as I tried to clarify when I said

Thanks!