System Description: Notes

The Multiplex Control System has four internal functions:

• Multiplexing (send multiples signals over shared wires)
• Wake up/sleep (runs at full power only on demand to reduce battery draw)
• Fail-safe (fixes or ignores faulty signals)
• Self-diagnosis (Mode 1 for the system, Mode 2 for input lines)

The system controls the function of the following circuits

• Engine Oil Pressure Indicator
• Seat Belt Reminder
• Lights-on Reminder
• Key-in Reminder
• Key Light Timer
• Dash Lights Brightness Control
• Entry Light Control (ignition key light and ceiling light)
• Automatic Lights-off
• Power Door Locks
• Power Window (including key-off timer operation)
• Wiper/Washer (including speed sensitive intermittent wiper)
• Security Alarm
• Interlock system
• Memory Mirror Control
• Driving Position Memory System (DPMS)
• OnStar System