Wireless Door Lock Buzzer
WARNING: This page is about a different car, the 2003 Lexus IS 300 and 2002 Lexus IS 300. 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 approximately 1 kΩ. See CONNECTOR IDENTIFICATION . If the resistance is not as specified, replace the buzzer.