Corolla Keyless Entry Failure

Sounds familiar. Had a similar gremlin with my old Saab 9-3 a few years back. Keyless entry packed it in, but the remote still worked fine. I also had an error stored. Have you checked the cable or plug connection to the door actuator (the bit that physically locks and unlocks the door)? These things can corrode or work loose.

Good shout on the door actuator connection! Where exactly is that located, and how much dismantling am I looking at to get to it? Is it part of the door switch assembly?

On the Saab, it was inside the door, connected to the locking mechanism. You'll need to remove the door card at least. I'd advise checking the connection first. Check the pins for corrosion. If that looks ok, it might be the actuator itself. But honestly, at that point, it might be worth getting a workshop to take a look. I did that, and they charged me 95€ and all works fine.

Appreciate the heads up! I had a feeling it was going to be a door-card-off job. Just wanted a bit of a steer before diving in. Solved: Cable was lose and the signal pins were corroded. Used some contact spray and now the keyless entry works again. Thanks a lot!