Tesla Model 3: HV Battery (Dual Motor) - Install

Install

1. Perform step 11 through step 26 of the penthouse air leak test on the HV battery. See Penthouse Air Leak Test. 

2. Hand-tighten the adjustable elements (x4) on the penthouse cover counter-clockwise so that they are fully engaged.

Caution:

Hand-tighten only.

3. Install a new HV battery cover gasket. See Gasket - Cover - HV Battery (Remove and Replace).
4. Install the HV battery alignment rods; 2 at the front of the vehicle and 2 at the HV battery near the penthouse.
5. With an assistant, position the HV battery underneath the vehicle.
6. Lower the vehicle to the HV battery, and with an assistant, align the holes with the alignment rods.

Note: Do not fully lower the vehicle onto the HV battery. The battery will still need to slightly move to install the bolts in the following steps.

Caution:

Make sure that the coolant hoses and HV harnesses are not caught on the alignment rods or sandwiched between the HV battery and the vehicle. 

7. Hand-tighten the LH and RH bolts (x16) that attach the HV battery to the body.

Note: Install the washers to the locations recorded earlier during removal.

8. Hand-tighten the bolts (x4) that attach the front of the HV battery to the vehicle.

9. Hand-tighten the front center bolt that attaches the HV battery to the vehicle.
10. Remove the HV battery alignment rods. 

11. Hand-tighten the bolts (x8) that attach the HV battery LH and RH support brackets to the vehicle.

12. Hand-tighten the bolts (x4) that attach the center portion of the HV battery through the HV battery center rail ski cover.

LH shown, RH similar 

13. Install and hand-tighten the smaller bolts that would attach the LH and RH shear plates to the body.

Note: Do not install the shear plates at this time.

14. Fully raise the handle on the rear drive unit HV electrical harness. 

15. Attach the HV connector lever lock onto the back of the HV electrical harness.
16. Firmly connect the HV electrical harness to the HV battery connector.

Caution:

Make sure that the harness fits the connector squarely and tightly.

17. While pressing the harness to the connector, remove the HV connector lever lock. 
18. While pressing the harness to the connector, fully lower the handle.

19. Sle the release to lock the HV electrical harness.

20. Install the nuts that attach the rear drive unit HV electrical harness bracket to the HV battery. Torque 10 Nm
21. Position the coolant drain under the rear RH se of the HV battery. 

22. Remove the plugs from the coolant outlet hose and the powertrain return hose, immediately connect the male and female fittings, and then fasten the clip.

Note: Perform a push-pull-push test on the fittings to make sure that they are secure.

23. Position the coolant drain under the rear LH se of the HV battery. 

24. Remove the plugs from the rear drive unit inverter inlet hose and the LH underse of the penthouse, immediately connect the male and female fittings, and then fasten the clip.

Note: Perform a push-pull-push test on the fittings to make sure that they are secure.

25. Remove the coolant drain container from underneath the vehicle.
26. Install the rear HV battery sk plate, but only hand-tighten the fasteners. See Sk Plate - HV Battery - Rear (Remove and Replace).
27. Open the LH rear door.

Caution:  Do not damage any components while working around this area.

28. Hand-tighten the 5th LH rear inner bolt that attaches the HV battery to the body.

Note: Lift up the rear main carpet for access.

29. Hand-tighten the 4th LH inner bolt that attaches the HV battery to the body.
30. Partially close, but do not latch, the LH rear door.
31. Open the LH front door.

Caution:  Do not damage any components while working around this area.

32. Hand-tighten the 3rd LH inner bolt that attaches the HV battery to the body.
33. Hand-tighten the LH front inner bolts (x2) that attach the HV battery to the body.
34. Partially close, but do not latch, the LH front door.
36. Open the RH rear door.

Caution:  Do not damage any components while working around this area.

36. Hand-tighten the 5th RH rear inner bolt that attaches the HV battery to the body.
37. Hand-tighten the 4th RH inner bolt that attaches the HV battery to the body, if equipped.
38. Partially close, but do not latch, the RH rear door.
39. Open the RH front door.

Caution:  Do not damage any components while working around this area.

40. Hand-tighten the 3rd RH inner bolt that attaches the HV battery to the body, if equipped.

41. Hand-tighten the RH front inner bolts (x2) that attach the HV battery to the body.
42. Partially close, but do not latch, the RH front door.
43. With an assistant, lower the vehicle onto the HV battery completely. 

44. Torque the LH and RH bolts (x16) that attach the HV battery to the vehicle. Torque 30 Nm

45. Torque the bolts (x4) that attach the front of the HV battery to the vehicle.Torque 30 Nm

46. Torque the front center bolt that attaches the HV battery to the vehicle.Torque 10 Nm

47. Torque the bolts (x8) that attach the HV battery LH and RH support brackets to the vehicle. Torque 110 Nm

48. Tighten the bolts (x4) that attach the center portion of the HV battery through the center ski cover.Torque 34 Nm
49. Torque the fasteners that attach the rear sk plate to the vehicle. See Sk Plate - HV Battery - Rear (Remove and Replace).
50. With an assistant, raise the vehicle, and then remove the battery table from underneath the vehicle. Set the vehicle to a comfortable working height.
51. Put the support stand to support the front portion of the rear subframe.

LH shown, RH similar

52. Remove the smaller bolts (x2) and the larger bolt that are used to attach the LH shear plate to the vehicle.

LH shown, RH similar 

53. Install the LH shear plate, and then install the smaller bolts (x2) that attach the shear plate to the HV battery.Torque 30 Nm

54. Install the larger bolt that attaches the shear plate to the vehicle, and then mark the bolt with a paint pen.Torque 128 Nm

LH shown, RH similar 

55. Fasten the fir tree clips that attach the coolant hoses to the LH shear plate.
56. Repeat steps 52 through 55 for the RH shear plate.
57. Remove the support stand from underneath the rear subframe
58. Install the m aero shield panel. See Panel - Aero Shield - M (Remove and Replace).
59. Position the coolant drain under the front LH se of the HV battery. 

60. Remove the plugs from the chiller to HV battery hose and the manifold at the LH se of the vehicle, immediately connect the male and female fittings, and then fasten the clip.

Note: Perform a push-pull-push test on the fittings to make sure that they are secure.

61. Fasten the clips that attach the chiller to HV battery hose to the body.

62. Remove the plugs from the HV battery return hose at the LH se of the vehicle, immediately connect the male and female fittings, and then fasten the clip.

Note: Perform a push-pull-push test on the fittings to make sure that they are secure.

63. Position the coolant drain under the front RH se of the HV battery. 

64. Remove the plugs from the rear powertrain supply hose at the RH se of the vehicle, immediately connect the male and female fittings, and then fasten the clip.

Note: Perform a push-pull-push test on the fittings to make sure that they are secure.

65. Remove the plugs from the powertrain return hose at the RH se of the vehicle, immediately connect the male and female fittings, and then fasten the clip.

Note: Perform a push-pull-push test on the fittings to make sure that they are secure.

66. Remove the coolant drain from underneath the vehicle. 

67. Install the bolt that attaches the ground strap to the HV battery Torque 10 Nm

68. Install the clip that attaches the front drive unit ground strap to the front drive unit.

69. Install the bolt that attaches the ground strap to the front drive unit. Torque 6 Nm

70. Install the front drive unit HV harness connector special tool on the front drive unit HV harness connector.

71. Connect the front drive unit harness connector to the front drive unit.

Note: Make sure the connector is fully seated, and that the front drive unit alignment tooth makes contact with the front drive unit harness connector lever.

72. Remove the front drive unit HV harness connector special tool. 

73. Slowly latch the release handle while pressing the front drive unit HV harness connector into the front drive unit.

Note: The front drive unit alignment teeth and HV harness connector alignment teeth should be interlocked.

74. Sle the red release tab to lock the front drive unit HV harness connector.

75. Install the bolt that attaches the front drive unit HV harness to the front drive unit. Torque 10 Nm

76. Connect the A/C HV connector.

77. Connect the PTC HV electrical connector, and then install the harnesses to the bracket.
78. Install the front HV battery sk plate. See Sk Plate - HV Battery - Front (Remove and Replace).
79. Remove the bungee straps from the LH and RH wheel arch liners. 

80. Fasten the clips along the bottom edge of the LH and RH wheel arch liners.
81. Install the front aero shield panel. See Panel - Aero Shield - Front (Remove and Replace).
82. Lower the vehicle fully, and chock a wheel.
83. Remove the lift adaptors from the body, and then install the body plugs.
84. Remove the chock, and with an assistant, push the vehicle away from the lift to a stall, and then re-chock the wheel.

Caution:

Push the vehicle for a very short distance and at less than 1 MPH.

85. Open all doors. 

86. Connect the positive 12V output cable to the DCDC passthrough, install a new nut to attach the cable, and mark the nut with a green paint pen after torque. Torque 9 Nm

Caution:

Make sure that the rubber boot is not trapped under the cable lug or pinched between the cable lug and nut.

87. Replace the cover on the positive 12V output cable at the DCDC passthrough, and then press down to attach the cover.
88. Install the DCDC ground busbar. See Busbar - DCDC Ground (Remove and Replace). 

89. Install the bolts that attach the LH and RH inner 2nd row rails to the penthouse cover.Torque 24 Nm

90. Connect the charge port HV harness connector to the penthouse; use one hand to support the harness connector while the other hand latches the locking tab.

Note: Verify that the charge port HV harness connector latch is not damaged and fully secured in the latched position.

91. Install the clip that attaches the charge port to HV harness connector to the LH lower C-pillar.

92. Install the harness clips, and then the bolts that attach the charge port to HV battery harness bracket at the penthouse. Torque 10 Nm

93. Install the HV cap that covers the HV harness located on the LH se of the penthouse.
94. Connect 12V power. See 12V Power (Disconnect and Connect).
95. Shift into Park to release the Electronic Parking Brake service mode, and then remove the wheel chock.
96. Connect a laptop with Toolbox to the vehicle.
97. Perform a cooling system vacuum refill. See Cooling System (Vacuum Refill).
98. Disconnect the laptop from the vehicle. 

99. Tighten the 5th LH rear inner bolt that attaches the HV battery to the body.Torque 66 Nm

Note: Lift up the rear main carpet for access.

100. Tighten the 4th LH inner bolt that attaches the HV battery to the body.Torque 66 Nm
101. Unfold the carpet back to its original position.
102. Move the driver seat fully rearwards. 

103. Tighten the 3rd LH inner HV battery bolt.Torque 66 Nm

104. Tighten the LH front inner HV battery bolts (x2) that attach the HV battery to the body.Torque 136 Nm

105. Unfold the LH front main carpet back to its original position; move the front edge down and sle back the section up to ease positioning. Install the seat electrical harness into the clip.

106. Install the clips (x3) that attach the LH front carpet to the vehicle.
107. Move the driver seat fully forwards. 

108. Tighten the 5th RH rear inner bolt that attaches the HV battery to the body. Torque 66 Nm

109. Tighten the 4th RH inner bolt that attaches the HV battery to the body, if equipped. Torque 66 Nm
110. Unfold the RH se of the rear carpet back to its original position.
111. Move the front passenger seat fully rearward. 

112. Tighten the bolt that attaches the 3rd RH inner HV battery bolt to the body, if equipped.

113. Tighten the RH front inner bolts (x2) that attach the HV battery to the body.Torque 136 Nm

114. Unfold the RH front main carpet back to its original position; move the front edge down and sle back the section up to ease positioning. Install the seat electrical harness into the clip.

115. Install the clips (x4) that attach the RH front carpet to the vehicle.
116. Move the front passenger seat fully forward. 

117. Install the clips (x4) and hook-and-loop strips that attach the rear carpet to the vehicle.

Note: The number of clips on newer vehicles might vary.

118. Install the LH lower B-pillar trim. See Trim - B-Pillar - Lower - LH (Remove and Replace).
119. Install the LH upper B-pillar trim. See Trim - B-Pillar - Upper - LH (Remove and Replace).
120. Install the LH rear sill panel trim. See Trim - Sill Panel - Rear - LH (Remove and Replace).
121. Install the LH 2nd row seat se bolster. See Bolster - Se - Seat - 2nd Row - LH (Remove and Replace).
122. Repeat step 118 through step 121 for the RH se of the vehicle.
123. Install the 2nd row lower seat cushion. See Seat Cushion - Lower - 2nd Row (Remove and Replace).
124. Install the 2nd row floor mat inse the vehicle.
125. Install the RH center console se panel carpet. See Carpet - Se Panel - Center Console - LH (Remove and Replace).
126. Install the RH front floor mat.
127. Install the front passenger footwell cover. See Cover - Footwell - Passenger (LHD) (Remove and Replace).
128. Install the RH lower A-pillar trim. See Trim - A-Pillar - Lower - LH (Remove and Replace).
129. Install the RH mdle A-pillar trim. See Trim - A-Pillar - Mdle - LH (Remove and Replace).
130. Install the RH instrument panel end cap. See End Cap - Instrument Panel - LH (Remove and Replace).
131. Install the LH center console se panel carpet. See Carpet - Se Panel - Center Console - LH (Remove and Replace).
132. Install the LH front floor mat.
133. Install the driver footwell cover. See Cover - Footwell - Driver (Remove and Replace).
134. Install the LH lower A-pillar trim. See Trim - A-Pillar - Lower - LH (Remove and Replace).
135. Install the LH mdle A-pillar trim. See Trim - A-Pillar - Mdle - LH (Remove and Replace).
136. Install the LH instrument panel end cap. See End Cap - Instrument Panel - LH (Remove and Replace).
137. Restore the driver and front passenger seats back to their original position.
138. Install the cabin intake duct. See Duct - Cabin Intake (Remove and Replace).
139. Install the rear underhood apron. See Underhood Apron - Rear (Remove and Replace).
140. Close the hood and all four doors.
141. Install the LH and RH lower rocker panel covers. See Cover - Rocker Panel - Lower - LH (Remove and Replace).

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