Tesla, Inc.
Service Bulletin

Rewrite Shunt Resistance Hex Value

SB-20-16-002
March 04, 2020
Classification

Section/Group

Mobile Service

Campaign Bulletin

16 - HV Battery System

Can Perform
(where permitted)

Model Year

Model

Country/Region

Version

2020

Model 3

All

All

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.

Condition
Certain Model 3 vehicles were configured with incorrect shunt resistance hex 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 Hex Value

S022016002

0.15

Shop Supplies Paint pen

Procedure
CAUTION: This procedure has time-dependent steps. Reread through the entire procedure to become familiar
before performing it.
NOTE: The tool to display the correct shunt resistance hex 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 hex value for the vehicle.

DOUBLE-CLICK YELLOW
BOX, THEN TYPE VIN

SHUNT RESISTANCE IN HEX

3. Click on this text to deactivate the tool in step 2.
4. Record the entire shunt resistance hex value, including the leading zeros, and have it standing by for step 9.
5. Connect a laptop with Toolbox to the vehicle.
Page 1 of 4

SB-20-16-002
_

6. In Toolbox, select the Actions/Autodiag 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, 9,10, and 11 must be completed within 60 seconds.

Figure 2

8. Select the Actions/Autodiag tab, type “shunt” into the search field, and click HVP write shunt ohm (Figure 3).

Figure 3

Page 2 of 4

SB-20-16-002
_

9. Click on the line above “Run Network”, type the entire shunt resistance hex value from step 4, and then click Run
Network (Figure 4).

Figure 4
10. Select the prod environment (Figure 5).
NOTE: It is not necessary to connect the 12V float charger in this situation, because the vehicle will be on 12V
auxiliary power for only one minute. The contactors are open, and the HVC low voltage connector is connected.

Figure 5
11. Click RUN (Figure 6), and wait for the routine to successfully complete.
NOTE: If the routine fails, repeat from step 6.

Figure 6
12. Disconnect the laptop from the vehicle.
13. Remove the 2nd row lower seat cushion (refer to Service Manual procedure 13051002).

Page 3 of 4

SB-20-16-002
_

14. Use a paint pen to write: “Shunt res: hex, ” onto the penthouse cover.
Where:


is the entire value from step 4.



is the date.

For example, “Shunt res: 00005F85 hex, 02/21/2020”
15. Install the 2nd row lower seat cushion (refer to Service Manual procedure 13051002).

Page 4 of 4

SB-20-16-002
For feedback on the accuracy of this document, email ServiceBulletinFeedback@tesla.com