Relay Controlled Power Mode: Notes
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
The BCM uses the discrete ignition switch inputs Ignition 1, Ignition 3 and Crank to distinguish the correct power mode. Once the BCM has determined the power mode selected by the vehicle operator it will energize the Ignition relay, Run relay and RAP relay, depending on which power mode is selected.