Car Finder Function
WARNING: This page is about a different car, the 2002 Lexus GS 430 and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
When the lock switch on the transmitter is pressed with all the doors locked, the body ECU No. 1 receives the signal and the hazard light flashes once through communication control of the body ECU and door ECU etc.