DTC B1269/69: Theft Deterrent Ecu Communication Stopped: DTC Detecting Condition
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
DTC B1269/69 is detected when communication between theft deterrent ECU and body control ECU has stopped for more than 10 seconds.