Only Wireless Control Function is Inoperative: Description
WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
The signal from the transmitter is input to the theft warning ECU through the RDA line. The status of the RDA and RSSI lines are diagnosed by the theft warning ECU. If the wireless door lock control system fails, check for DTCs to confirm if the cause is the RDA and/or RSSI line.