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Home >> Saturn >> 2004 >> Vue Red Line, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Body Control System >> Description and Operation >> Body Control System Description and Operation >> Power Mode

Power Mode

The BCM monitors ignition 1 voltage circuit 339, ACC voltage circuit 743 and the engine run flag (ERF). The ERF is a serial data message from the engine controller. The BCM determines the state of the ignition switch for all modules on the serial data link.

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