Circuit Description
WARNING: This page is about a different car, the 2004 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
The door key lock and unlock switch is built in the door key cylinder. When the key is turned to the lock position, terminals 4 (LH) and 3 (RH) of the switch are grounded. When the key is turned to the unlock position, terminals 3 (LH) and 4 (RH) of the switch are grounded.