Wake-up and Sleep Function

The multiplex integrated 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 MICU stops functioning (communication and CPU control) when it is not necessary for the system to operate.
• As soon as any operation is requested (for example, a door is unlocked), the related control unit in the sleep mode immediately wakes up and begins to function.
• When the ignition switch is turned OFF, and the driver's door is opened, then closed, there is a delay about 40 seconds before the control unit goes from the wake-up mode to the sleep mode.
• The sleep mode will not function if any door is opened or if a key is in the ignition.
• The draw is reduced from 200 mA to less than 35 mA when in the sleep mode.