Tesla, Inc.

Service Bulletin

SB-20-16-002
December 22, 2023

Rewrite Shunt Resistance Value

R2

Classification

Section/Group

Mobile Service

Model Year

Country/Region

Build Location

Campaign Bulletin

2020

Model

Model 3

16 - HV Battery System

All

Configuration

Can Perform (where
permitted)

All

Fremont, Giga Shanghai

The model(s) and model year(s) listed are a general approximation of the affected VIN list. Refer to the VIN/Bulletin Tracker or Customer/Vehicle profile to determine
applicability of this bulletin for a particular vehicle.

Campaign Bulletin: This campaign bulletin addresses a known non-safety-related condition and provides recommended technical
diagnosis and repair procedures. Apply this procedure to all vehicles in the affected VIN list.

This Service Document supersedes SB-20-16-003 R1, dated May 29, 2021. This new revision, R2, updates the word
“penthouse” to “ancillary”. Each content change is marked by a vertical line in the left margin. Discard the previous
version and replace it with this one.

Condition
Certain Model 3 vehicles were configured with incorrect shunt resistance values that can affect charging capacity and
range performance.

Correction
Rewrite the shunt resistance with the correct value for the vehicle.

Correction Description

Correction

Time

SB-20-16-002 Not Applicable

S012016002

0.00

Rewrite Shunt Resistance Value

S022016002

0.15

Shop Supplies Paint pen

Procedure
CAUTION: This procedure has time-dependent steps. Read through the entire procedure to become familiar
before performing it.
NOTE: The tool to display the correct shunt resistance value for a given VIN has been integrated into step 2 of this
document.
1. Make sure that the vehicle is in Park, there is no charging cable connected, and the climate control system is
completely powered off.
2. Double-click the yellow box below to activate the tool. Type the VIN in upper case, and press the Enter key to
display the correct shunt resistance value for the vehicle.

DOUBLE-CLICK YELLOW
BOX, THEN TYPE VIN

SHUNT RESISTANCE

3. Click on this text to deactivate the tool in step 2.
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4. Record the 5-digit shunt resistance value, and have it standing by for step 9.
NOTE: For example, the shunt resistance might be 24986.
5. Connect a laptop with Toolbox 3 to the vehicle.
6. In Toolbox, select the Actions tab, type “contactors” into the search field, and click Ensure Power Off (Figure 1).

Figure 1
7. Click RUN (Figure 2).
CAUTION: After the contactors open, steps 8 and 9 must be completed within 60 seconds.

Figure 2
8. Select the Actions tab, type “shunt” into the search field, click HVP write shunt ohm (Figure 3), and then click
Run Network (Figure 4).

Figure 3

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Figure 4
9. In the window that opens, click on the line above “Submit”, type the 5-digit shunt resistance value from step 4,
click Submit (Figure 5), and then wait for the routine to successfully complete (Figure 6).
NOTE: If the routine fails, repeat from step 6.

Figure 5

Figure 6
10. Disconnect the laptop from the vehicle.
11. Remove the 2nd row lower seat cushion (refer to Service Manual procedure 13051002).
12. Use a paint pen to write: “Shunt res: , ” onto the ancillary cover.
Where:
•
•

is the 5-digit value from step 4.
is the date.

For example: “Shunt res: 24986, 05/25/2021”
13. Install the 2nd row lower seat cushion (refer to Service Manual procedure 13051002).

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For feedback on the accuracy of this document, email ServiceBulletinFeedback@tesla.com