2025-04-10

Service Brake HCU Electricaltronic Control Unit Kit (Remove and Install)

Correction code 3310010101 FRT 1.92 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.

2025-04-10: Added torque values for different brake calipers.

Note

This procedure is applicable to vehicles manufactured outside of North America.

Torque Specifications

Table 1. Torque Specifications: Service Brake HCU Electricaltronic Control Unit Kit (Remove and Install)
Description	Torque Value	Recommended Tools	Reuse/Replace	Notes
Bolt that attaches the steering column to the steering gear assembly	18 Nm (13.3 lbs-ft)	13 mm deep socket	Replace	1111523-00-A
Bolt that secures the A/C compressor ground strap	7 Nm (5.2 lbs-ft)	Torx T25 socket	Reuse
Bolts (x2) that attach the compressor and bracket assembly to the shock tower brace	31 Nm (22.9 lbs-ft)	15 mm deep socket	Reuse
Nuts (x4) that attach the 4-tube bundle brake pipes to the HCU Nut that attaches the master cylinder secondary pipe to the HCU Nut that attaches the master cylinder primary pipe to the HCU	18 Nm (13.3 lbs-ft)	12 mm 6-point flare nut wrench	Reuse
Bolts (x2) that attach the HCU to frame rail	10 Nm (7.4 lbs-ft)	10 mm socket	Reuse
Grommet nuts (x2) that attach the HCU to the HCU bracket	8 Nm (5.9 lbs-ft)	10 mm deep socket	Reuse

Remove

Place the vehicle on the 2-post lift.

TIp
Ensure the vehicle is not charging.
Open the LH front door and lower the LH front window.
Lock the steering wheel into position.
Remove the underhood storage unit. See Underhood Storage Unit (Remove and Replace).
Remove the LV battery. See LV Battery (Remove and Install).
Remove all the four wheels. See Wheel Assembly (Remove and Install).
Remove the front aero shield panel. See Panel - Aero Shield - Front (Remove and Replace).
Lower the vehicle to a comfortable working height and set the lift onto locks.
Remove and discard the bolt that attaches the steering column to the steering gear assembly.
TIp
Use of the following tool(s) is recommended:

13 mm deep socket
Slide the steering column upward to disconnect it from the steering gear assembly.
Position a fluid catcher underneath the front of the vehicle.
Position protective fender cover over the fan shroud.
Disconnect the HVIL connector.

Note
Pull the red tab to disengage the lock, and then pull it again to release the connector.
Disconnect the A/C compressor logic connector.
Remove the clip that attaches the harness to the HV harness bracket.
Remove the bolt that secures the A/C compressor ground strap.
TIp
Use of the following tool(s) is recommended:

Torx T25 socket
Remove the tree clip that attaches the radiator inlet hose to the A/C compressor bracket.
Remove the retaining clips (x5) that attach the A/C compressor HV harness to the shock tower support brace.

Note
Pull upward on the clips to assist with removal. Do not pull on the HV cable. Discard any damaged clip.
Remove the tree clips (x4) that attach the coolant hose to the A/C compressor bracket.
With assistance, remove the bolts (x2) that attach the compressor and bracket assembly to the shock tower brace, and then move the compressor and bracket assembly aside.
Note
Support the A/C compressor while removing the fasteners. Carefully move the compressor and bracket assembly towards the front of the vehicle.
TIp
Use of the following tool(s) is recommended:

15 mm deep socket
Disconnect the HCU connector.

Note
Release the red locking tab, then press the black release tab and rotate the lever upward to remove.
Release the HCU connector harness clip.
Place absorbent material underneath the brake lines and the brake fluid reservoir to catch any fluid lost.
Remove the nuts (x4) that attach the 4-tube bundle brake pipes to the HCU.
TIp
Use of the following tool(s) is recommended:

12 mm 6-point flare nut wrench
Release the 4-tube bundle brake pipes from the spacer.

Note
Do not bend the pipes.
Remove the nut that attaches the master cylinder secondary pipe to the HCU.
TIp
Use of the following tool(s) is recommended:

12 mm 6-point flare nut wrench
Remove the nut that attaches the master cylinder primary pipe to the HCU.
TIp
Use of the following tool(s) is recommended:

12 mm 6-point flare nut wrench
Release the clips (x2) to remove the spacer from the master cylinder brake pipes.

Note
Do not bend the pipes.
Release the master cylinder brake pipes from the clips (x2) at the rear of the HCU bracket.

Note
Do not bend the pipes.
Remove the bolts (x2) that attach the HCU to frame rail.
TIp
Use of the following tool(s) is recommended:

10 mm socket
Release the tabs (x2) to remove the HCU and bracket assembly.

Note
Negotiate the HCU around the brake lines. Take care not to damage the bracket tabs.
Loosen the grommet nuts (x2) that attach the HCU to the HCU bracket.
TIp
Use of the following tool(s) is recommended:

10 mm socket
Pry the HCU from the HCU bracket.

Install

Install the HCU into the HCU bracket.
Install the grommet nuts (x2) that attach the HCU to the HCU bracket.
8 Nm (5.9 lbs-ft)
TIp
Use of the following tool(s) is recommended:

10 mm deep socket
Secure the tabs (x2) to install the HCU and bracket assembly onto the vehicle.

Note
Negotiate the HCU around the brake lines. Align the bracket tabs with the body holes.
Install the bolts (x2) that attach the HCU to frame rail.
10 Nm (7.4 lbs-ft)
TIp
Use of the following tool(s) is recommended:

10 mm socket
Install the master cylinder brake lines to the clips (x2) at the rear of the HCU bracket.
Clip the spacer onto the master cylinder brake pipes.
Hand-tighten the nut that attaches the master cylinder primary pipe to the HCU, and then torque it.
18 Nm (13.3 lbs-ft)
TIp
Use of the following tool(s) is recommended:

12 mm 6-point flare nut wrench
Hand-tighten the nut that attaches the master cylinder secondary pipe to the HCU, and then torque it.
18 Nm (13.3 lbs-ft)
TIp
Use of the following tool(s) is recommended:

12 mm 6-point flare nut wrench
Clip the 4-tube bundle brake pipes onto the spacer.
Install the nuts (x4) that attach the 4-tube bundle brake pipes to the HCU.
18 Nm (13.3 lbs-ft)
Note
Clean the lines with brake cleaner before mating as needed.
TIp
Use of the following tool(s) is recommended:

12 mm 6-point flare nut wrench
Secure the HCU harness clip to the HCU bracket.
Connect the HCU connector.

Note
Rotate the lever downward, and then secure the red locking tab.
With assistance, install the bolts (x2) that attach the compressor and bracket assembly to the shock tower brace.
31 Nm (22.9 lbs-ft)
TIp
Use of the following tool(s) is recommended:

15 mm deep socket
Install the tree clips (x4) that attach the coolant hose to the A/C compressor bracket.
Install the retaining clips (x5) that attach the A/C compressor HV harness to the shock tower brace.

Note
Visually inspect the clips and replace any damaged clip.
Install the tree clip that attaches the radiator inlet hose to they A/C compressor bracket.
Install the bolt that secures the A/C compressor ground strap.
7 Nm (5.2 lbs-ft)
TIp
Use of the following tool(s) is recommended:

Torx T25 socket
Install the clip that attaches the harness to the HV harness bracket.
Connect the A/C compressor logic connector.
Connect the HVIL connector.
Install the LV battery. See LV Battery (Remove and Install).
Remove the protective fender cover over the fan shroud.
Remove the fluid catcher from underneath the vehicle.
Slide the steering column downward to connect it to the steering gear assembly.

Note
Ensure the intermediate shaft is aligned and fully seated.
Install a new bolt that attaches the steering column to the steering gear assembly.
18 Nm (13.3 lbs-ft)
TIp
Use of the following tool(s) is recommended:

13 mm deep socket
Locally connect a laptop with Toolbox 3 to the vehicle. See Toolbox 3 (Connect and Disconnect).
Clean the area around the brake fluid reservoir breather cap and remove the cap.
Add clean brake fluid to the full level in the bleeder reservoir.
Add clean brake fluid to the MAX level in the reservoir.
Install the pressure bleeder adapter onto the vehicle brake reservoir.
Connect power supply to the bleeder tool, and then turn the bleeder tool on.
Set the brake bleed reservoir pressure to 30 PSI, and then attach the brake bleed reservoir to the brake bleed adapter.
Bleed the inner valve of the LH front caliper.
1. Remove the LH front caliper inner bleed valve cover, and then install the fluid catcher.
2. Open the inner bleed valve and watch the fluid as it flows out of the caliper.
3. In Toolbox, click on the Actions/Autodiag tab, and then search for "Bleed FL".
4. Click PROC_ESP_FRONT-L-REAR-R_BRAKE-BLEEDvia Toolbox: (link), click Run and allow the routine to complete.
5. Close the bleed valve when the pump stops.
6. Make sure that the reservoir does not go empty, or that the catch bottle does not overfill.
7. Repeat step 33.b through step 33.f until clean fluid without bubbles flows out of the caliper.
8. Remove the fluid catcher, and then torque the LH front caliper bleed valve and install the valve cap.
  Mando brake calipers
  
  10 Nm (7.4 lbs-ft)
  
  Hitachi brake calipers
  
  12 Nm (8.8 lbs-ft)
  
  Brembo brake calipers
  
  18.5 Nm (13.6 lbs-ft)
  TIp
  Use of the following tool(s) is recommended:
  
  11 mm socket
Bleed the inner valve of the RH front caliper.
1. Remove the RH front caliper inner bleed valve cover, and then install the fluid catcher.
2. Open the inner bleed valve and watch the fluid as it flows out of the caliper.
3. In Toolbox, click on the Actions/Autodiag tab, and then search for "Bleed RH".
4. Click PROC_ESP_FRONT-R-REAR-L_BRAKE-BLEEDvia Toolbox: (link), click Run and allow the routine to complete.
5. Close the bleed valve when the pump stops.
6. Make sure that the reservoir does not go empty, or that the catch bottle does not overfill.
7. Repeat step 34.b through step 34.f until clean fluid without bubbles flows out of the caliper.
8. Remove the fluid catcher, and then torque the RH front caliper bleed valve and install the valve cap.
  Mando brake calipers
  
  10 Nm (7.4 lbs-ft)
  
  Hitachi brake calipers
  
  12 Nm (8.8 lbs-ft)
  
  Brembo brake calipers
  
  18.5 Nm (13.6 lbs-ft)
  TIp
  Use of the following tool(s) is recommended:
  
  11 mm socket
Bleed the RH rear caliper.
1. Remove the RH rear caliper bleed valve cover, and then install the fluid catcher.
2. Open the bleed valve and watch the fluid as it flows out of the caliper.
3. In Toolbox, click on the Actions/Autodiag tab, and then search for "Bleed".
4. Click PROC_ESP_FRONT-L-REAR-R_BRAKE-BLEEDvia Toolbox: (link), click Run and allow the routine to complete.
5. Close the bleed valve when the pump stops.
6. Make sure that the reservoir does not go empty, or that the catch bottle does not overfill.
7. Repeat step 35.b through step 35.f until clean fluid without bubbles flows out of the caliper.
8. Remove the fluid catcher, and then torque the RH rear caliper bleed valve and install the valve cap.
  10 Nm (7.4 lbs-ft)
  TIp
  Use of the following tool(s) is recommended:
  
  11 mm socket
Bleed the LH rear caliper.
1. Remove the LH rear caliper bleed valve cover, and then install the fluid catcher.
2. Open the bleed valve and watch the fluid as it flows out of the caliper.
3. In Toolbox, click on the Actions/Autodiag tab, and then search for "Bleed".
4. Click PROC_ESP_FRONT-R-REAR-L_BRAKE-BLEEDvia Toolbox: (link), click Run and allow the routine to complete.
5. Close the bleed valve when the pump stops.
6. Make sure that the reservoir does not go empty, or that the catch bottle does not overfill.
7. Repeat step 36.b through step 36.f until clean fluid without bubbles flows out of the caliper.
8. Remove the fluid catcher, and then torque the LH rear caliper bleed valve and install the valve cap.
  10 Nm (7.4 lbs-ft)
  TIp
  Use of the following tool(s) is recommended:
  
  11 mm socket
Turn off and remove the pressure brake bleeder kit from the vehicle.
Check the brake fluid level and top off as necessary.
Install the service brake reservoir cap.
Remove the absorbent material from underneath the brake booster assembly and the reservoir area.
Perform the following routine using Service Mode or Toolbox (see 0005 - Service Modes):
1. TEST-SELF_BRAKE_X_DPB-ESP-CORNER-STIFFNESS-TEST
  via Toolbox: (link)via Service Mode Plus:
  chassis ➜ DPB Post Replacement ➜ Corner Stiffness Test
  chassis ➜ ESP Post Replacement ➜ Corner Stiffness Test
  Note
  
  If the test fails due to leakage, identify and address the root cause of the leak.
  If the test fails due to stiffness, perform a brake fluid bleed procedure on the failed caliper.
  If the test still fails after completing the brake fluid bleed procedure on the failed caliper, proceed with the Advanced Bosch Brake Fluid Bleed/Flush (Maintenance) Procedure.
2. TEST-SELF_DPB_LEAKAGE-AND-AIR-MONITORINGvia Toolbox: (link)
  
  Note
  If the routine fails, perform Advanced Bosch Brake Fluid Bleed/Flush (Maintenance).
  
  Note
  To perform this routine via the touchscreen: Chassis > Procedures > DPB Post Replacement > Leakage and Air Monitoring Test
Press the brake pedal several times to verify proper feel and action.
Exit Service Mode or disconnect the laptop if applicable (see 0005 - Service Modes).
Install the front aero shield panel. See Panel - Aero Shield - Front (Remove and Replace).
Install all the four wheels. See Wheel Assembly (Remove and Install).
Install the underhood storage unit. See Underhood Storage Unit (Remove and Replace).
Install the HEPA filter assembly. See Hepa Filter (Remove and Replace).
Remove the steering wheel holder.
Raise the LH front window and close the LH front door.
Remove the vehicle from the lift.
Perform a road test to make sure there is proper pedal feel and brake performance.

Note
Add test drive correction code 00040100 as a separate activity to the Service Visit.

Service Brake HCU Electricaltronic Control Unit Kit (Remove and Install)

Torque Specifications

Remove

Install

Figure 1

Figure 2

Figure 3