Conditions for Setting the DTC

WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.

The battery voltage falls below 11 volts, engine speed greater than 1,100 RPM for 15 seconds.
The battery voltage is greater 16 volts, engine speed greater than 1,100 RPM for 15 seconds.
The battery voltage differs by 2 volts on the BCM battery sense circuits for 10 seconds.