Multiplex Control Systems: Description
WARNING:
Deactivate air bag system before performing any service operation. See AIR BAG RESTRAINT SYSTEMS
article. DO NOT apply electrical power to any component on steering column without first deactivating air bag system. Air bag may deploy.
NOTE:
Multiplex control system may be referred to as Simplified Wiring System (SWS).
Multiplex control system uses Electronic Time Alarm Control System (ETACS) ECU, front-ECU and column-ECU to process signal data to control on/off operation of electrical loads in order to transmit and receive multiplex data. See Fig 1.