Inspect Wireless Door Lock Buzzer Operation
WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
Connect the positive (+) lead from the ohmmeter to terminal 1 and the negative (-) lead to terminal 2, and measure resistance of approx. 1 k/Ohm.
If resistance is not as specified, replace the buzzer.