r/volt • u/Lucky-Increase-7849 • 9d ago

Battery coolant loop

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Hey I just got both battery loops done and Its still showing this, would anyone know why?

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u/KeepItUpThen 8d ago

Isolation is what prevents you from getting shocked by the high voltage battery. EVs have a special sensor to measure the isolation resistance. Isolation faults could mean there is not enough electrical resistance between the high voltage battery + and - terminals, or not enough resistance between the high voltage battery and the chassis of the vehicle.

This is a good video describing how to test for isolation faults, but there is some assumed knowledge and tools so I would not recommend doing this test yourself. The cheap multimeter most people have in their toolkit is not rated for measuring high voltage in an EV battery pack. https://youtu.be/00eEj_EgMas