10/04/2024 11:23:34

12V/LV Battery (Remove and Replace)

2024-04-10: Added a Note to perform the recovery of the LV battery per Toolbox article prior to its replacement.
2024-01-19: Updated instructions for different types of Li-Ion battery.
2023-12-04: Updated configuration steps for different types of Li-Ion battery.
2023-10-04: Updated configuration steps for lead acid battery to become a separate activity (correction code 91022407) to be added to the service visit.
2023-09-07: Updated lead-acid procedure with guidance for changing lead-acid battery types.
2023-09-06: Updated Li-Ion Battery procedures according to the latest procedure input.

Correction Codes and FRTs

Model Y with Lead Acid Battery: 17011202, 0.18
Model Y with Li-Ion Battery: 17011232, 0.18

NOTE: Unless otherwise explicitly stated in the procedure, the above correction code and 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. To provide feedback on FRT values, email LaborTimeFeedback@tesla.com. NOTE: See Personal Protection to make sure wearing proper PPE when performing the below procedure.

Torque Specifications

Table 1. Torque Specifications: 12V/LV Battery (Remove and Replace)
Description	Torque Value	Recommended Tools	Reuse/Replace	Notes
(Lead acid) positive/negative cable to the battery terminal	6 Nm (4.4 lbs-ft)	10 mm deep socket ¼ in std ratchet 4 in extension	Reuse
(Li-Ion) bolts that attach the LV battery to the bracket	6 Nm (4.4 lbs-ft)	8 mm socket ¼ in std ratchet 4 in extension	Reuse	Early production vehicles have M6 bolts with 10 mm bolt head. Torque those to 10 Nm

Remove Lead Acid Battery

Note

If replacing a Clarios (Varta) 12V battery with an AtlasBX 12V battery, or vice-versa, make sure the vehicle is running software version 2023.32 or newer. Update the vehicle software if necessary; see Software Update.

Remove the rear underhood apron. See Underhood Apron - Rear (Remove and Replace).
Disconnect 12V power. See 12V/LV Power (Disconnect and Connect).
Disconnect the vent tube hose from the LH side of the battery.
Remove the cover for the 12V positive terminal.
Loosen the nut that attaches the positive lead to the battery, and then remove the lead from the battery.
6 Nm (4.4 lbs-ft)
Tip: Use of the following tool(s) is recommended:
- 10 mm deep socket
- ¼ in std ratchet
- 4 in extension
Remove the 12V battery strap. See Strap - 12V Battery (Remove and Replace).
Remove the battery from the vehicle.
Write the last 6 digits of the vehicle VIN clearly onto the removed battery so that it can be identified if later needed.

Remove Li-Ion Battery

Note

The Li-Ion LV battery may not need to be replaced. Attempt to recover the LV battery first before determining that the LV battery needs replacement. Refer to Toolbox article 6249900 for more information.

Remove the HEPA filter. See Assembly - Filter - HEPA (Remove and Replace).
Power off the vehicle from the center display.
Disconnect the LV battery connector from the LV battery: release the green locking tab, press the black connector (if applicable, on 16V battery), pull the black connector lock outwards to release the connector, and then pull up to disconnect the connector.
Disconnect the first responder loop.
Wait 2 minutes for the electrical system to fully discharge.
Remove the bolts (x3) that attach the LV battery to the vehicle.

Note
Early production vehicles may be equipped with M6 bolts (torque 10 Nm), later production vehicles are equipped with M8 bolts (torque 6 Nm).
Remove the LV battery from the vehicle.

Install Lead Acid Battery

Installation procedure is the reverse of removal, except for the following:

CAUTION

Before installing the new 12V battery, make sure that the new battery's Open Circuit Voltage (OCV) is above 12.6V. If the OCV is between 12.4V and 12.6V, recharge the new battery. Any battery below 12.4V must be discarded.

If replacing a Clarios (Varta) 12V battery with an AtlasBX 12V battery, or vice-versa, update the vehicle configuration.
Note
The configuration update can only be performed on vehicles with vehicle software version 2023.32 and newer.
Note
If a configuration update is required, separately add Correction Code 91022407 (Vehicle Configuration Update) to the Service Visit.
1. Unlock the vehicle gateway. See Gateway (Unlock).
2. In the Service Mode menu, go to Low Voltage > Power Distribution > Change Battery Type.
3. Select the type of battery that was installed, and then touch Change Battery Type to Selected.
4. Read the prompt, touch Run, and allow the routine to complete.

Install Li-Ion Battery

Install the bolts (x3) that attach the LV battery to the vehicle.
5 Nm (3.7 lbs-ft)

Note
Early production vehicles may be equipped with M6 bolts (torque 10 Nm), later production vehicles are equipped with M8 bolts (torque 6 Nm).
Connect the first responder loop.
Connect the LV battery connector to the LV battery: insert the connector, then push the black connector lock inwards to engage the connector, and then seat the green locking tab after lock is fully secured.

Note
If the vehicle does not power up after the LV battery is connected, power up the vehicle with an approved external power supply.
Enter Service Mode. See Service Mode.
Unlock vehicle gateway. See Gateway (Unlock).
On the vehicle touchscreen, touch Low Voltage > Power Distribution > Battery Icon > Learn New Battery, and click Run to start the routine.

CAUTION
Vehicle software must be FW 2023.44 or later version.

Note
Once the routine is completed, the Mosfet and ECPA will be Closed.
Only if the replacement battery is CATL_LI_ION: reinstall the vehicle software. See Software Reinstall - Touchscreen.

Note
You can read the battery configuration via service UI > Low Voltage > Power Distribution > Li-Ion LV battery > Config.
Install the HEPA filter. See Assembly - Filter - HEPA (Remove and Replace).