Rendezvous FWD V6-3.4L VIN E (2005)
their subsystems can support all operator requirements. If the engine run flag serial data is False, indicating that the engine is not running, the modules
fail-safe to OFF-AWAKE. In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to
both local inputs and serial data inputs from other modules on the vehicle.
DISCRETE IGNITION SIGNALS
Those modules that have discrete ignition signal inputs also remain in the state dictated by the last valid PMM message received on the serial data
circuits. They then check the state of their discrete ignition input to determine the current valid state. If the discrete ignition input is active, B+, the
modules will fail-safe to the RUN power mode. If the discrete ignition input is not active, open or 0 voltage, the modules will fail-safe to
OFF-AWAKE. In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to both local
inputs and serial data inputs from other modules on the vehicle.
ELECTRICAL POWER MANAGEMENT
The body control module (BCM) provides the following electrical power management functions. Some power management functions are controlled by
working with other systems through the class 2 serial data link:
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Retained accessory power (RAP)-Refer to Retained Accessory Power (RAP) Description and Operation for further information.
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Load shed and idle boost actions-Refer to Load Shed System Description and Operation in Starting and Charging for further information.
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Inadvertent lighting control for battery run-down protection-Refer to Exterior Lighting Systems Description and Operation and Interior Lighting
Systems Description and Operation in Lighting Systems for further information.
