Function Explanation (DTC Detection Outline)

The current sensor detects the battery condition and sends the battery condition signal to the PCM. The PCM receives the battery condition signal from the current sensor and controls the battery. If the current sensor malfunctions, the battery is constantly charged because battery control is lost, which could cause the fuel economy to worsen.
The current sensor performs self-diagnosis on the battery voltage, battery fluid temperature and internal circuit, and if the PCM receives a malfunction signal from the current sensor, it stores a DTC.