my Toyota Echo's trunk lock stayed in the unlock position and my trunk latch is not working what happened? How can I get in the trunk?

Latch is bad or rod that connects to the key cylinder.

The lock is in valet mode which disables the interior trunk release lever next to the driver's seat. Insert your key and turn the lock back to vertical to enable the trunk release lever and past vertical to open the trunk. Mine is a little difficult to get out of valet mode with a copied key, no issues with the original. The fold-down rear seats, if equipped also have a valet switch on the back of the seat that disables the interior pull knob.

Thanks that worked perfectly.Thanks for your help.

I bought this car very used and with no manual. A few times, because I own a few vehicles and drive several others, I’ve turned the key the wrong direction when opening the trunk. What happens, especially with a copied key, is the lock gets turned counter-clockwise or to the left and the lock goes into valet mode and the imprecise cut will not allow the cylinder to return to normal mode. Hopefully you have an original key that will allow you to turn the cylinder clockwise or right and the lock will work as well as the driver’s side release tab. This is a security feature which is cool as long as you understand it’s operation. It took me a few, "experiences" to learn this solution.