Tesla, Inc.

Service Bulletin

SB-22-33-004
April 30, 2022

Retrofit Hydraulic Control Unit Wake-Up
Wire, Model 3 (Heat Pump, Li-Ion Battery)

Classification

Section/Group

Mobile Service

Model Year

Country/Region

Build Location

Repair Bulletin
2021 - 2022

33 - Brakes

Model

Model 3

Can Perform (where
permitted)

All

Configuration

Heat Pump, Li-Ion
Battery

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.

Repair Bulletin: This repair bulletin provides instructions on addressing a noted condition or possible customer concern regarding
the operation of Tesla vehicles. These instructions should only be performed by trained professionals.

Condition
Some Heat Pump Model 3 vehicles were built without a hydraulic control unit (HCU) wake-up wire, and in rare
circumstances, braking and stability control related alerts may appear on the instrument cluster and touchscreen
during the vehicle power-on process. Such faults can typically be corrected and the affected functionality restored with
a vehicle power cycle.

Correction
Upon customer complaint of braking and stability control alerts that clear after a vehicle power cycle, retrofit an HCU
wake-up wire.

Correction Description

Correction

Time

Retrofit HCU Wake-Up Wire, Model 3 (Heat Pump, Li-Ion Battery)

S022233004

0.45

SB-22-33-004 Not Applicable

Part Number
Parts Required 1742989-00-A
1061177-00-B

S012233004

0.00

Description

Quantity

ASY,HARN,ESP WAKE,JUMPER,M3Y
WIRE HARNESS REPAIR KIT

1
As Needed

These part numbers were current at the time of publication. Use the revisions listed or later, unless
otherwise specified in the Parts Catalog.

Special Tools 1025812-00-A
1060908-00-A
1451046-00-A
1451045-00-A

Pin Drag Kit
Soldering Iron and Heat Tool Kit
Crimp Tool
Wire cutting and stripping pliers

Shop Supplies Electrical tape

Page 1 of 12

SB-22-33-004
_

Procedure
1. Remove the underhood storage unit (refer to Service Manual procedure 15240702).
2. Lay a fender protector over the fan shroud and reinforcement beam (Figure 1).

Figure 1
3. Remove the LV battery (refer to Service Manual procedure 17011232).
4. Release the clips (x4) that attach the HV harness to the shock tower brace (Figure 2).

Figure 2
5. Remove the bolt that attaches the A/C compressor ground strap to the A/C compressor (Figure 3).

Figure 3

Page 2 of 12

SB-22-33-004
_

6. Release the clip that attaches the A/C compressor LV logic harness to the A/C compressor HV harness bracket
(Figure 4).

Figure 4
7. Pull the red tab out, and then pull the red tab again to disconnect the A/C compressor LV logic harness from the
A/C compressor connector (Figure 5).

Figure 5
8. Pull the red tab out, and then pull the red tab again to disconnect the A/C compressor HVIL connector from the
electrical harness at the LH shock tower (Figure 6).

Figure 6

Page 3 of 12

SB-22-33-004
_

9. With the help of an assistant to support the weight of the A/C compressor, remove the bolts (x3) that attach the
A/C compressor to the A/C compressor bracket (Figures 7 and 8).

Figure 7

Figure 8

10. Carefully set the compressor onto the reinforcement beam (Figure 9).
CAUTION: Do not set the compressor down on the HV connector.

Figure 9
11. Slide the red locking tab, raise the lever (Figure 10), and then remove connector X151 from the HCU (Figure 11).

Figure 10

Figure 11

12. If necessary, remove cable ties or cut tape to move connector X151 to a comfortable working position.

Page 4 of 12

SB-22-33-004
_

13. Remove the cable tie from the rear of connector X151 (Figure 12).

Figure 12
14. Release the tabs (x2) that attach the rear cover to connector X151 (Figure 13), swing the rear cover out
(Figure 14), and then remove the rear cover from the connector.

Figure 13

Figure 14

15. Unwrap and remove the electrical tape from the electrical harness for a distance of 150 mm from connector X151
(Figure 15).

Figure 15

Page 5 of 12

SB-22-33-004
_

16. Use a pick to slide the large locking tab of connector X151 from “CLOSE” to “OPEN” (Figure 16).

Figure 16
17. Use the tool from the pin drag kit to release the lock for terminal 28 of connector X151 (Figure 17), and at the
same time, remove the white wire from receptacle 28 (Figure 18).

Figure 17

Figure 18

18. Cut the terminal from the white wire, and then wrap the wire end with yellow tape (Figure 19).

Figure 19

Page 6 of 12

SB-22-33-004
_

19. Use the tool from the pin drag kit to release the lock for terminal 25 of connector X151 (Figure 20), and at the
same time, remove the yellow wire from receptacle 25 (Figure 21).

Figure 20

Figure 21

20. Cut the yellow power terminal wire 100 mm from the end (Figure 22), and then discard the end.

Figure 22
21. Slide the shrink tubing over both wires of the jumper, to the middle of the jumper (Figure 23).

Barrel
crimp

Figure 23

Page 7 of 12

SB-22-33-004
_

22. Make a butt splice repair to attach the yellow power terminal wire to the barrel crimp of the jumper (Figures 24, 25,
and 26).
NOTE: Refer to SI-17-17-002,’Electrical Harness Repair’ for instructions how to make this repair.

Figure 24 – Crimp wire and
solder barrel crimp

Figure 25 – Slide shrink tubing over
barrel crimp and heat

Figure 26 – Wrap with yellow
tape to complete

23. Insert the smaller terminal of the jumper into receptacle 28 (Figure 27) and the larger terminal of the jumper into
receptacle 25 (Figure 28).

Figure 27

Figure 28

24. Perform a Push-Pull-Push check on each wire to make sure the wires are secure in the connector (Figure 29).

Figure 29

Page 8 of 12

SB-22-33-004
_

25. Use a pick to slide the large locking tab of connector X151 from “OPEN” to “CLOSE” (Figure 30).

Figure 30
26. Bundle the white wire and excess jumper wire neatly into the electrical harness with yellow tape (Figure 31), and
then wrap the harness with anti-abrasion tape (Figure 32).

Figure 31

Figure 32

27. Attach the rear cover to connector X151, and then swing the rear cover close (Figure 33), engaging the tabs (x2)
(Figure 34).

Figure 33

Figure 34

Page 9 of 12

SB-22-33-004
_

28. Fasten a small cable tie to the rear of connector X151 to secure the rear cover (Figure 35), and then trim the tie.

Figure 35
29. Attach connector X151 to the HCU (Figure 36), lower the lever, and then slide the red locking tab (Figure 37).

Figure 36

Figure 37

30. With the help of an assistant to support the weight of the A/C compressor, install the bolts (x3) that attach the A/C
compressor to the A/C compressor bracket (Figures 38 and 39) (torque 9 Nm).

Figure 38

Figure 39

Page 10 of 12

SB-22-33-004
_

31. Connect the A/C compressor HVIL connector to the electrical harness at the LH shock tower, and then push the
red tab in to lock the connector (Figure 40).

Figure 40
32. Connect the A/C compressor LV logic harness to the A/C compressor connector, and then push the red tab in to
lock the connector (Figure 41).

Figure 41
33. Fasten the clip that attaches the A/C compressor LV logic harness to the A/C compressor HV harness bracket
(Figure 42).

Figure 42

Page 11 of 12

SB-22-33-004
_

34. Install the bolt that attaches the A/C compressor ground strap to the A/C compressor (Figure 43) (torque 7 Nm).

Figure 43
35. Fasten the clips (x4) that attach the HV harness to the shock tower brace (Figure 44).

Figure 44
36. Install the LV battery (refer to Service Manual procedure 17011232).
37. Remove the fender protector from the fan shroud and reinforcement beam (Figure 45).

Figure 45
38. Install the underhood storage unit (refer to Service Manual procedure 15240702).

Page 12 of 12

SB-22-33-004
For feedback on the accuracy of this document, email ServiceBulletinFeedback@tesla.com