Function Explanation (DTC Detection Outline)

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

The battery assures voltage for engine starting and while the vehicle is being driven. (Addition necessary for both domestic and overseas)
The PCM determines a dendrite malfunction by the condition in which the battery voltage value continues to be low for the specified time. In this case, the PCM determines a malfunction in a battery - related part and stores a DTC.