Tesla BMS_a079 Due to Battery Deep Discharge

When the BMS_a079 alert is triggered, verify deep discharge status by checking the pack voltage via the Service Mode interface. A deep discharge state is confirmed if the total pack voltage is significantly below the nominal operating threshold, often caused by extended vehicle storage without a trickle charge or high parasitic drain. Inspect the battery management logs for 'Under-Voltage' fault flags which indicate that individual cell groups have dropped below the safe chemical threshold for normal charging operations.

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