Circuit Description
WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
The telephone transceiver transmits signals to the telephone ECU assy (Mayday ECU) and receives the signals from the LEXUS link center. It is located under the under back panel, which is on the right side of the luggage room.