The complaint is a fob that locks but will not unlock. The cell usually fitted is a CR2032 in most smart keys, or a CR2016 in many older remote-head and flip keys, and the key is a smart key, flip key, or remote-head key. People who searched toyota key fob locks but will not unlock still have one rule to follow. The printed stamp on the old cell wins over a photo of a different year.
Name what a fob that locks but will not unlock looks like
A fob that locks but will not unlock shows up as this: Lock works. Unlock does not.
On a case of a fob that locks but will not unlock, start with the cell you can see, not a new fob story.
The a fob that locks but will not unlock complaint still uses a CR2032 in most smart keys, or a CR2016 in many older remote-head and flip keys.
Check the likely cause of a fob that locks but will not unlock
The usual cause when you see a fob that locks but will not unlock is one contact or one button pad, not a completely dead cell.
A direct check for a fob that locks but will not unlock: Reseat the cell and test both buttons from outside.
The printed stamp on the old cell wins over a photo of a different year. That rule still holds while you chase a fob that locks but will not unlock.
Rule out the wrong fault for a fob that locks but will not unlock
A fob that locks but will not unlock is not this: A dead cell usually kills every button, not one direction.
A battery-only swap does not require programming.
A never-paired extra fob is a dealer or licensed locksmith job. Stop there.
The 12-volt battery under the hood is a different part from the coin that runs a fob that locks but will not unlock.
Decide when to stop on a fob that locks but will not unlock
Stop here for a fob that locks but will not unlock: If one direction stays dead with a known-good cell, the pad or the fob is the fault. Stop.
CR2450, A23, and LIR2032 do not fix a fob that locks but will not unlock.
Almost every fob with a fob that locks but will not unlock still takes one cell.
Plus stays the flat branded face unless the shell mark says otherwise while you reseat the cell for a fob that locks but will not unlock.
Read beside a fob that locks but will not unlock
While you sort a fob that locks but will not unlock, read notes for What Battery Does a Toyota Key Fob Take.
While you sort a fob that locks but will not unlock, read How to Replace a Toyota Key Fob Battery.
While you sort a fob that locks but will not unlock, read the page Toyota Key Fob Not Working After Battery Change.
While you sort a fob that locks but will not unlock, read the write-up on Toyota Polarity.
While you sort a fob that locks but will not unlock, read notes for Start a Toyota with a Dead Key Fob.
Questions answered only with the facts above
What usually causes a fob that locks but will not unlock?
one contact or one button pad, not a completely dead cell.
What should a driver not blame for a fob that locks but will not unlock?
A dead cell usually kills every button, not one direction.
When should work on a fob that locks but will not unlock stop?
If one direction stays dead with a known-good cell, the pad or the fob is the fault. Stop.