Diagnostic Function
WARNING: This page is about a different car, the 2018 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
ETACS-ECU sets DTC No. B1A10, B1A11, B1A12, B1A13, B1A14, B1A15, B1A16, or B1A17 when it receives low battery voltage signal from the transmitter.