All Doors LOCK / UNLOCK Functions do not Operate Via Master Switch, Both Front Door Key Cylinders: Description
WARNING: This page is about a different car, the 2011 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
The main body ECU (instrument panel junction block) receives switch signals from the door control switch and front door key cylinder, and activates the door lock motor on each door according to these signals.