Multiplex Control System: Description
Multiplex control system consists of a driver, passenger, and door multiplex control units. These 3 control units integrate independent control units using multiplex communication lines. See Fig 1 .
Driver's multiplex control unit is located behind driver's side kick panel. Passenger's multiplex control unit is located behind passenger's side kick panel. Door multiplex control unit is located in driver's door and is incorporated in power window master switch.
Multiplex control system includes a multiplex function, wake-up/sleep function, fail-safe function, and a 2-mode self-diagnostic function. Self-diagnostic Mode 1 is used to diagnose multiplex control system. Self-diagnostic Mode 2 is used to diagnose a failure in input line of each system.
Multiplex integrated control system includes engine oil pressure indicator flasher circuit, seat belt reminder circuit, and lights-on and key-in reminder circuits. Other controlled systems include dash illumination brightness control, entry illumination, rear window defogger, trunk opener, power door locks (with keyless entry), power windows (with key-off timer operation), wiper/washers (with speed respondent intermittent wiper), security alarm system and interlock system.