DTC B1272: Power seat ECU communication stop: Wiring Diagram

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.

See DTC B1266, B1267: INSTRUMENT PANEL SYSTEM COMMUNICATION [| BUS MALFUNCTION (+B SHORT), INSTRUMENT PANEL SYSTEM COMMUNICATION BUS MALFUNCTION (GND SHORT) .