2026-09-23

LV Battery - Recover (Restore)

Correction code 170100080.06 NOTE: Unless otherwise explicitly stated in the procedure, the correction code and its associated FRT reflect all of the work required to perform this procedure, including the linked procedures. Do not stack correction codes unless explicitly told to do so. NOTE: See Flat Rate Times to learn more about FRTs and how they are created. NOTE: See Personal Protection to make sure proper PPE is worn when performing the below procedure.

  • 2026-09-22: Updated the "Close MOSFET" touchscreen process and added a closeout routine step.
  • 2025-05-15: Fully revised procedure.

LV Battery Recover

Note
The LV battery won't recover unless the HV system is healthy and supporting the vehicle. Make sure that the HV system is functioning correctly before attempting to recover the LV battery.
  1. Enable Service Mode. See Service Mode (Enable and Disable).
  2. Make sure that no external power source is connected to the jump post.
  3. Make sure that the high voltage system is supporting the low voltage system. On the touchscreen, touch Service Mode > Low Voltage > Power Distribution and make sure that the PCS DCDC Support Status indicates Active.
  4. Make sure that the LV battery is properly connected. On the touchscreen, touch Service Mode > Low Voltage > Power Distribution and make sure that the Li-ion LV Battery ECPA (Electrical Connector Position Assurance) status indicates Closed.
  5. Confirm that the Li-ion LV battery MOSFET status is Closed. On the touchscreen, touch Service Mode > Low Voltage > Power Distribution and make sure that the Li-ion LV Battery MOSFET status indicates Closed (Green).
    Figure 1. Li-ion LV Battery MOSFET status Closed
  6. If the MOSFET status is Open (Orange), the LV battery has not auto-recovered and the following alert(s) will be present:
    • VCBATT_a478_LVBMS_MOSFET_Open
    Figure 2. Li-ion LV Battery MOSFET status Open
  7. On the touchscreen, touch Close MOSFET > Run, and allow the routine to complete.
  8. If the previous step does not successfully recover the battery, proceed with using the Tesla LV Li-ion battery charger to recover the LV battery, and then repeat this procedure.
  9. Exit Service Mode. See Service Mode (Enable and Disable).