Wake-up and Sleep Function

WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

The multiplex integrated control system has "wake-up" and "sleep" functions to decrease parasitic draw on the battery when the ignition switch is in LOCK (0) position.

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 to LOCK (0), 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 the ignition switch is turned ON (II).
The draw is reduced from 2.6 A to less than 35 mA when in the sleep mode.

NOTE: Sleep and Wake-up Mode Test (see SLEEP AND WAKE-UP MODE TEST ).