Keyless entry not working

[Podchick]

I have a 2007 yaris with keyless entry and this also means it has a start button rather than you putting your keys in the ignition. This weekend the fob has completely stopped working even though the battery is relatively new and the red light comes on. I think it needs reprogramming and while I've seen lots of posts with instructions on how to do this, they all involve putting the keys on the ignition. This isn't possible for me but I'd rather avoid having to tow my car to the garage to sort this out so if anyone knows how to reprogramme the fob for this type of yaris I'd be eternally gratefully grateful!