Driver Door Module Wake-Up/Sleep States

The driver door module, which is the power mode master, is responsible for sending a power mode message on the SBI and Class 2 data line to other systems. When the power mode message is sent, other systems respond to this message by entering a power-up state and sending a State of Health Code (SOH) code message. This SOH message indicates they are able to communicate information between other systems.

The driver door module is able to control or perform all of the driver door module functions in the wake-up state. The driver door module enters the sleep state when active control or monitoring of system functions has stopped, and the driver door module has become idle again. The driver door module must detect certain wake-up inputs before entering the wake-up state and monitors these inputs during the sleep state. The driver door module is able to detect switch transitions that cause the two wake-up states, activated or deactivated. Multiple switch wake-ups are need in order to sense both the insertion and the removal of the ignition key.

The driver door module will enter a wake-up state if any of the following wake-up inputs are detected:
^ Any activity on the serial data line
^ Hatch ajar switch
^ Hatch release switch
^ Door ajar switch
^ Key-in-ignition switch
^ Monitored load relay
^ Park/fog/headlights are on
^ The driver door module experiences a battery disconnect and reconnect condition.
^ The ignition is turned ON.

The driver door module will enter a sleep state when all of the following conditions exist:
^ No activity exists on the serial data line.
^ The ignition switch is OFF.
^ No outputs are commanded.
^ No delay timers are actively counting.
^ No wake-up inputs are present.

If all these conditions are met the driver door module will enter a low power or sleep condition. This condition would indicate the driver door module, which is the power mode master of the vehicle, must have sent a message to the other systems on the serial data line to stop broadcasting their state of health message.