System Inhibits
The auto stop/start inhibit monitoring of the battery is performed by the Body Control Module/Gateway Module (BCM/GWM) assembly. If the battery voltage is too low to support an auto stop/start, then the BCM/GWM assembly will suspend auto stop/start.
The BCM/GWM assembly monitors the battery and the Voltage Quality Module (VQM). Any fault found will cause the BCM/GWM assembly to inhibit auto stop/start and the BCM/GWM assembly will record a Diagnostic Trouble Code (DTC).