Wake-Up & Sleep Functions
WARNING: This page is about a different car, the 1998 Honda Prelude. However, it is still accessible from the selected car via links, so may be relevant.
To decrease parasitic draw on battery when ignition is off, wake-up and sleep modes are used. In sleep mode, multiplex control unit stops communication and CPU control functions when system operation is not needed. When any monitored system or switch operates, such as a door being unlocked, the related multiplex control unit will change from sleep function to wake-up function. A wake-up signal is then sent to other multiplex control units. When ignition switch is turned off, there is a 10-second delay before sleep mode begins. Sleep mode will not begin if any door is open.