Dash Integration Module Wake-Up/Sleep States

The Dash Integration Module (DIM) is able to control or perform all DIM functions in wake-up state. DIM enters sleep state when active control or monitoring of system functions has stopped, and DIM has become idle again. DIM must detect certain wake-up inputs before entering wake-up state. DIM monitors for these inputs during sleep state, where DIM is able to detect switch transitions that cause DIM to wake-up when activated or deactivated.

Multiple switch inputs are needed in order to sense both insertion of ignition key and power mode requested. This would allow DIM to enter a sleep state when ignition key is in or out of ignition. DIM will enter a wake-up state if any of the following wake-up inputs are detected:

• Activity on serial data circuit.
• Detection of a battery disconnect and reconnect condition.
• Headlights are on.
• Ignition switch is turned to RUN position.
• Key-in-ignition switch.
• Parking lights are on.

The DIM will enter a sleep state when all of the following conditions exist:

• Ignition switch is turn to LOCK position.
• No activity exists on serial data circuit.
• No outputs are commanded.
• No delay timers are actively counting.
• No wake-up inputs are present.

If all these conditions are met, DIM will enter a low power or sleep condition. This condition indicates that DIM, which is the PMM of the vehicle, has sent an OFF-ASLEEP message to other systems on the serial data circuit.