Circuit/System Description
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
The battery energy control module (BECM) monitors to detect a fault with the contactor.
The Link Voltage is the voltage on the 36 volt cable between the SGCM and the BECM, Pack voltage is the sum of all module voltages. refer to Hybrid Energy Storage Schematics for detailed information.