Circuit Description
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
This DTC is output when communication from the airbag ECU is interrupted for10 sec. or more. In this case, possible causes are communication interruption from the airbag ECU, a failure in the bus buffer ECU or a break of the harness between the bus buffer ECU and the telephone ECU (Mayday ECU).