Wake-up and Sleep

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Honda Odyssey, 2003 Honda Odyssey, 2002 Honda Odyssey, 2001 Honda Odyssey, and 2000 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

The multiplex control system has "wake-up" and "sleep" functions to decrease parasitic draw on the battery when the ignition switch is OFF.

In the sleep mode, the multiplex control unit stops the functions (communication and CPU control) when it is not necessary for the system to operate.
As soon as any operation is requested (for example, door is unlocked), the related control unit in the sleep mode immediately wakes up and begins to function. This control unit also sends a wake-up signal to the other control units via the communication lines.
When the ignition switch is turned OFF, and driver's or front passenger's door is opened then closed, there is about a 10 second delay before the control units go from the wake-up mode to the sleep mode.
If any door is open, the sleep mode will not function.
If a key is in the ignition switch, the sleep mode will not function.
If one of the key cylinder switch inputs is shorted, the sleep mode will not function.