Wireless Door Lock Control Circuit Description: General
WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
The wireless door control receiver performs the code identification process and the body ECU effects the door lock control. See Fig 1. Serial data link is provided for communication between the wireless door control receiver and the body ECU.
A key-integrated, 3-button type transmitter and a rolling code system, in which the signal configuration changes each time when a signal is transmitted by the transmitter, has been adopted.