Tesla Model 3: Car Computer (Remove and Replace)

Car Computer - Remove

SPECIAL TOOLS

Plug,Car Computer Fluid Port (1119171-00-A)

Kit, Battery Coolant Drain & Fill (1065131-00-A)

Kit, Computer Purge Adapters, Model 3 (1473522-00-A)

Kit, Svc Plug, Cooling Hose, Model 3 (1135762-00-A)

Remove

1. If "Tow Mode" is active, then disable "Tow Mode."
2. If the car computer is being removed because it needs replacement, refer to SI-18-21-001 before you begin for important information.
3. Disconnect 12V power. See 12V Power (Disconnect and Connect).
4. Remove the underhood storage unit. See Underhood Storage Unit (Remove and Replace).
5. Remove the outer HVAC plenum duct. See Duct - HVAC Plenum - Outer (Remove and Replace).
6. Place absorbent material below the car computer coolant hose connections to collect any spilled coolant.

7. Release the clips on the coolant hoses connected to the car computer, and then disconnect the coolant hoses from the car computer.
8. Plug the female fittings of the coolant hoses.
9. Connect the computer purge drain adapter to the left car computer coolant fitting, and then fasten the clip.
10. Connect the coolant cart drain hose to the left drain adapter.
11. Connect the computer purge inlet adapter to the right car computer coolant fitting, and then fasten the clip.
12. Connect the coolant cart flush hose to the right drain adapter.
13. Close the valve at the pressure regulator in the coolant cart.
14. Connect supply air to the pressure regulator.
15. Slowly open the valve at the pressure regulator and allow the coolant to drain into the waste container.
16. Start a 1-minute timer.
17. After 1 minute, close the valve at the pressure regulator.
18. Disconnect supply air from the pressure regulator
19. Disconnect the coolant cart flush hose from the right drain adapter.
20. Release the clip and disconnect the computer purge inlet adapter from the right car computer coolant fitting.
21. Disconnect the coolant cart drain hose from the left drain adapter.
22. Release the clip and disconnect the computer purge drain adapter from the left car computer coolant fitting.

23. Install the car computer fluid port plug over the car computer coolant fittings.

24. Remove and discard the nuts that attach the car computer to the body.
25. Release the clips that attach the emergency footwell speaker panel to the instrument panel.
26. Disconnect the harness from the emergency footwell speaker connector, and remove the emergency footwell speaker panel from the vehicle.
27. Remove the RH lower A-pillar trim. See Trim - A-Pillar - Lower - LH (Remove and Replace).
28. Remove the RH center console side panel carpet. See Carpet - Side Panel - Center Console - LH (Remove and Replace).
29. Remove the RH footwell duct. See Duct - Footwell - RH (Remove and Replace).

30. Remove the clips that attach the front RH carpet to the body, and then fold the front RH carpet rearwards.

31. Remove the nuts that attach the RH carpet locator bracket to the body, and then remove the bracket from the vehicle. Torque 2.5 Nm
32. Place absorbent material beneath the car computer to catch any spilled coolant.
33. Put on an antistatic wrist strap, and connect the strap to a body ground point.
34. Move the car computer inwards to allow better access to the clips and electrical connectors of the car computer.

35. Release the clips that attach the electrical harness to the car computer.

36. Disconnect the electrical harness connectors (x21) from the car computer, and then remove the computer from the vehicle.

Caution: Avoid spilling coolant on the electrical connectors.

Caution: Take care not to damage the passenger airbag harness and connectors during removal.

37. If present, release the clips (x4) that attach the car computer shroud to the car computer, and then set the shroud aside.
38. Remove the antistatic wrist strap.
39. If the car computer is defective and to be returned to MRB, make sure that:

• The car computer is fully drained of coolant.
• The coolant ports are properly and tightly plugged.
• The car computer is wrapped in several layers of paper towels before is it packed for return shipment.

Car Computer - Install

Install

1. Put on an antistatic wrist strap, and connect the strap to a body ground point.

2. If not already installed, position a car computer shroud on the car computer, and then install the clips (x4) that attach the shroud to the computer.

3. Bring the car computer to where it installs into the vehicle, and then connect the electrical harness connectors (x21) to the car computer.

Caution:  Avoid spilling coolant on the electrical connectors.

Caution: Take care not to damage the passenger airbag harness and connectors during installation.

4. Fasten the clips that attach the electrical harness to the car computer.
5. Move the car computer forward so that the mounting studs pass through the firewall.
6. Remove the antistatic wrist strap.
7. Remove the absorbent material from beneath the car computer.

8. Install new nuts (x4) to attach the car computer to the body. Torque 7.1 Nm

9. Install the RH carpet locator bracket to the body, and then install the nuts that attach the RH carpet locator bracket to the body. Torque 2.5 Nm

10. Unfold the front RH carpet forward, and then install the clips that attach the front RH carpet to the body.
11. Install the RH footwell duct. See Duct - Footwell - RH (Remove and Replace).
12. Install the RH center console side panel carpet. See Carpet - Side Panel - Center Console - LH (Remove and Replace).
13. Install the RH lower A-pillar trim. See Trim - A-Pillar - Lower - LH (Remove and Replace).
14. Bring the emergency footwell speaker panel to the vehicle, and then connect the harness to the emergency footwell speaker connector.
15. Install the emergency footwell speaker panel to the instrument panel, and then fasten the clips that attach the emergency footwell speaker panel to the instrument panel.

16. Remove the car computer fluid port plug from the car computer coolant fittings.
17. Remove the plugs from the female fittings of the coolant hoses.

18. Release the clips on the coolant hoses, connect the coolant hoses to the car computer, and then fasten the clips.
19. Remove the absorbent material from below the car computer coolant hose connections.
20. Connect 12V power. See 12V Power (Disconnect and Connect).
21. If a new car computer is being installed, refer to SI-18-21-001 for further instruction.
22. Refill the cooling system. See Cooling System (Vacuum Refill).
23. Install the outer HVAC plenum duct. See Duct - HVAC Plenum - Outer (Remove and Replace).
24. Install the underhood storage unit. See Underhood Storage Unit (Remove and Replace).