12 Volt Battery Deterioration Detection
The PCM receives information which are the 12 volt battery internal resistance, temperature, current, and voltage via the F-CAN from the gauge control module. The PCM detects the 12 volt battery deterioration condition based on the received information. If the PCM determines that the 12 volt battery is deteriorated, it disables the auto idle stop.
After replacing the 12 volt battery, reset the 12 volt battery internal resistance value by the 12 volt battery internal resistance reset procedure.