Diagnostic Function
WARNING: This page is about a different car, the 2009 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
WCM sets the diagnostic trouble code No. B1A10, B1A11, B1A12, B1A13, B1A14, B1A15, B1A16, or B1A17 when it receives low battery voltage signal from the transmitter.