Circuit Description
WARNING: This page is about a different car, the 2003 Lexus ES 300 and 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
Multiplex Communication System (MPX) body ECU senses, by the unlock warning switch, that the key is in the key cylinder. Because of this, the MPX body ECU will unlock all the doors immediately after locking them if a door has been locked while the key is in the key cylinder. For circuit identification, see Fig 1.