Body Control Module Asleep/Wake-Up Signals

Signals that activate the BCM are known as wake-up signals. BCM is asleep when it is not controlling or monitoring the following wake-up functions:

• Any activity on serial data line.
• Hatch or door ajar switch.
• Hatch release switch.
• Key-in-ignition switch.
• Monitored load relay.
• Any exterior lighting function.
• Battery disconnection and reconnection.
• Ignition is turned on.

The BCM will enter asleep state when there is no activity on serial data line, ignition is turned off, no outputs are commanded, no delay timers are actively counting and no wake-up inputs are present.