Discrete Ignition Signal

Modules that have discrete ignition signal inputs also remain in state dictated by last valid PMM message received on serial data circuits. Modules then check state of discrete ignition input to determine current valid state. If discrete ignition input is active, battery voltage, modules will fail-safe to "RUN" power mode. If discrete ignition input is not active, open or 0 voltage, modules will fail-safe to "OFF-AWAKE". In this state modules are constantly checking for a change status message on serial data circuits and can respond to both local inputs and serial data inputs from other modules on vehicle.