Multiplex Communication Functions

Multiplex control system reduces the number of wire harnesses by sending digital signals over shared multiplex communication lines. A CPU converts input signals from each switch to digital signals, and transmits these as serial signals. Transmitted serial signals from multiplex control units are converted to switch signals for switch operation. There are 3 dedicated communication lines between multiplex control units, from door control unit terminal No. 15 to driver's control unit 26-pin connector "B" terminal No. 23 (Brown/Yellow wire), from driver's control unit 26-pin connector "B" terminal No. 9 to passenger's control unit connector "A" terminal No. 22 (Brown/White wire), and from passenger's control unit connector "A" terminal No. 9 to driver's control unit 26-pin connector "B" terminal No. 22 (Red/Yellow wire). See WIRING DIAGRAMS  .