2025-10-15

Contactors - HV Battery - Pair (Remove and Replace)

Correction code 1630012122 FRT 1.14 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 ServiceManualFeedback@tesla.com. NOTE: See Personal Protection to make sure wearing proper PPE when performing the below procedure.NOTE: See Ergonomic Precautionsfor safe and healthy working practices.

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Warning
This procedure is a DRAFT. Although it has been validated, Warnings and Cautions might be missing. Follow safety requirements and use extreme caution when working on or near High Voltage systems and components.
  • 2025-10-15: Released new procedure.
  1. Open all four doors
  2. Lower all four windows
  3. Move LH front seat forward
  4. Move RH front seat forward
  5. Open hood
  6. Remove rear underhood apron
    Informational PurposesAn informational icon, calling your attention
    Note
    14x clips
  7. Power off vehicle from center display
    Informational PurposesAn informational icon, calling your attention
    Note
    Via Controls > Safety > Power Off, Select Power Off button at warning dialogue box
  8. Disconnect LV battery and first responder loop
    Informational PurposesAn informational icon, calling your attention
    Note
    2x connectors, Release green locking tab, Press black tab then pull black connector lock outwards to release connection, Release red lock tab on FRL, Allow 2 minutes for all electrical circuits to fully discharge
  9. Release 2nd row seat cushion and disconnect harness connectors
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    Note
    2x clips, 2x connectors, Press tabs backward then pull front edge up
  10. Verify operation of multimeter
    Informational PurposesAn informational icon, calling your attention
    Note
    Set multimeter to DC voltage, Confirm multimeter is properly measuring voltage by testing the 16v battery
  11. Remove all items from pockets and ensure not wearing metal items
  12. Inspect HV insulating gloves
    Informational PurposesAn informational icon, calling your attention
    Note
    Check gloves for damage prior to use, Refer to service document TN-15-92-003, for information on inspecting HV gloves. https://service.teslamotors.com/documents?model=&keys=TN-15-92-003&vehicle_system=&sort_by=field_date_submitted&sort_order=DESC
  13. Put on HV insulating gloves and leather over gloves
    Informational PurposesAn informational icon, calling your attention
    Note
    Make sure to wear electrical protective gloves any time Hioki tester is used
  14. Remove bolts securing ancillary bay probe lid cover from ancillary bay cover
    Informational PurposesAn informational icon, calling your attention
    Note
    2x bolts, EP10 5-Lobe, 6 Nm, Discard after removal
  15. Remove ancillary bay probe lid cover from ancillary bay cover
  16. Verify no high voltage
    Informational PurposesAn informational icon, calling your attention
    Note
    Make sure to wear PPE (HV gloves, safety glasses) when working on high voltage component, Measure B+ to Ground, B- to Ground, B+ to B-, If voltage is greater than 10V, Pack contactors are not open or welded, Stop work and reach out to Service Engineering
  17. Inspect ancillary bay probe lid cover gasket then position onto ancillary bay cover
    Informational PurposesAn informational icon, calling your attention
    Note
    Confirm no visual damage present, Wipe ancillary bay with IPA to clean surface, Allow to 1 minute dry time
  18. Install bolts securing ancillary bay probe lid cover to ancillary bay cover
    Informational PurposesAn informational icon, calling your attention
    Note
    2x bolts, EP10 5-Lobe, 6 Nm, Install new bolts
  19. Remove HV insulating gloves
  20. Disconnect HVC logic connector and install logic cap
    Informational PurposesAn informational icon, calling your attention
    Note
    1x connector, 1x cap, Release locking tab then push the handle downward to release connector
  21. Remove bolts securing ancillary bay cover to HVC
    Informational PurposesAn informational icon, calling your attention
    Note
    3x bolts, E10, 5 Nm + 30 degrees
  22. Remove bolts securing ancillary bay cover to HV battery
    Informational PurposesAn informational icon, calling your attention
    Note
    18x bolts, E10 5-Lobe, 8 Nm, Use E10 5-Lobe socket without magnet, The fasteners are captive and will stay attached to the ancillary bay cover
  23. Inspect HV insulating gloves
    Informational PurposesAn informational icon, calling your attention
    Note
    Check gloves for damage prior to use, Refer to service document TN-15-92-003 R1, for information on inspecting HV gloves. https://service.teslamotors.com/protected-doc/ServiceBulletins/External/TN/TN-15-92-003_High_Voltage_Awareness_Care_Points_R4.pdf
  24. Put on HV insulating gloves and leather over gloves
    Informational PurposesAn informational icon, calling your attention
    Note
    Make sure to wear electrical protective gloves any time Hioki tester is used
  25. Remove HVC logic cap
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    Note
    1x cap
  26. Remove ancillary bay cover from HV battery
  27. Install HVC logic cap
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    Note
    1x cap
  28. Inspect ancillary bay for any missing insulators
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    Note
    Install service insulator kit before continuing to next step, The number of bolts on newer vehicles may vary
  29. Remove bolts securing pyro disconnect to ancillary bay
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    Note
    1x insulator, patch bolts, 13mm, 9 Nm, Discard after removal
  30. Remove pyro disconnect from ancillary bay
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    Note
    1x connector from the bottom, Lift pyro disconnect straight up and out of the ancillary bay
  31. Install pyro disconnect dummy
  32. Lift HV Controller up to gain access to fuse insulator
    Informational PurposesAn informational icon, calling your attention
    Note
    Setup seatbelt to hold HVC assembly and tray in upward postition
  33. Disconnect PCS to DC bus HV connector
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    Note
    1x connector, Release locking tab then disconnect
  34. Disconnect PCS logic connector from PCS
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    Note
    1x connector
  35. Disconnect PCS LV connector from PCS
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    Note
    1x connector, Release the locking tab by pulling upward, May need plastic trim tool to help lift the connector upward
  36. Disconnect ancillary bay harness connectors from positive pack contactor
    Informational PurposesAn informational icon, calling your attention
    Note
    2x connectors
  37. Remove HV PCS to DC Bus harness clip from positive pack contactor
    Informational PurposesAn informational icon, calling your attention
    Note
    1x clip
  38. Remove HV joint insulators from positive HV switch
    Informational PurposesAn informational icon, calling your attention
    Note
    2x insulators
  39. Remove bolt securing positive pack contactor to positive busbar
    Informational PurposesAn informational icon, calling your attention
    Note
    1x patch bolt, 13mm, 9 Nm, Discard after removal
  40. Remove nut securing positive pack contactor to module 4 rear terminal
    Informational PurposesAn informational icon, calling your attention
    Note
    1x patch nut, 13mm, 9 Nm, Discard after removal
  41. Remove nuts securing positive pack contactor to ancillary bay
    Informational PurposesAn informational icon, calling your attention
    Note
    3x nuts, 10mm, 8 Nm, Use insulated magnet to retrieve the nuts after removal, The number of nuts on newer vehicles may vary
  42. Remove positive pack contactor from ancillary bay
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    Note
    2x guide pins
  43. Position positive pack contactor to ancillary bay for installation
    Informational PurposesAn informational icon, calling your attention
    Note
    2x guide pins
  44. Install nuts securing positive pack contactor to ancillary bay
    Informational PurposesAn informational icon, calling your attention
    Note
    3x nuts, 10mm, 8 Nm, Use insulated magnet as needed to position nuts onto studs, The number of nuts on newer vehicles may vary
  45. Install bolt securing positive pack contactor to positive busbar
    Informational PurposesAn informational icon, calling your attention
    Note
    1x patch bolt, 13mm. 9 Nm, Install new patch bolt, Mark after torque
  46. Install nut securing positive pack contactor to HV battery tall terminal to module 4 rear terminal
    Informational PurposesAn informational icon, calling your attention
    Note
    1x patch nut, 13mm, 9 Nm, Install new patch nut, Mark after torque
  47. Measure resistance from HV joint between HV battery positive contactor and center of HV battery positive terminal
    Informational PurposesAn informational icon, calling your attention
    Note
    1x HV joint, 110μΩ or less
  48. Perform Hioki impedance test at HV joint of positive pack contactor to DC link busbar
    Informational PurposesAn informational icon, calling your attention
    Note
    1x HV joint, The acceptable resistance is between 0.020 mΩ (20 μΩ) and 0.060 mΩ (60 μΩ), If the resistance is greater than 0.060 mΩ (60 μΩ), stop work and escalate a Toolbox session. If the resistance is less than 0.020 mΩ (20 μΩ), reposition the probes and measure again.
  49. Install ancillary bay harness clip to positive pack contactor
    Informational PurposesAn informational icon, calling your attention
    Note
    1x clip
  50. Connect ancillary bay harness connectors to positive pack contactor
    Informational PurposesAn informational icon, calling your attention
    Note
    2x connectors
  51. Connect PCS LV connector to PCS
    Informational PurposesAn informational icon, calling your attention
    Note
    1x connector, Push connector downward then push the locking tab downward to install connector, Make sure the connector is fully seated
  52. Connect PCS logic connector to PCS
    Informational PurposesAn informational icon, calling your attention
    Note
    1x connector
  53. Connect PCS to DC bus HV connector
    Informational PurposesAn informational icon, calling your attention
    Note
    1x connector, Connect then secure locking tab
  54. Lower HV Controller back into place
  55. Remove harness clip from FC contactor cover
    Informational PurposesAn informational icon, calling your attention
    Note
    1x clip
  56. Disconnect ancillary bay harness connectors from negative pack contactor
    Informational PurposesAn informational icon, calling your attention
    Note
    2x connectors
  57. Remove HV joint insulators from negative pack contactor
    Informational PurposesAn informational icon, calling your attention
    Note
    2x insulators
  58. Remove bolt securing negative pack contactor to DC link busbar joint
    Informational PurposesAn informational icon, calling your attention
    Note
    1x patch bolt, 13mm, 9 Nm, Discard after removal
  59. Remove nut securing negative pack contactor to HV battery tall silicon terminal
    Informational PurposesAn informational icon, calling your attention
    Note
    1x patch nut, 13mm, 9 Nm, Discard after removal
  60. Remove nuts securing negative pack contactor to penthouse
    Informational PurposesAn informational icon, calling your attention
    Note
    3x nuts, 10mm, 8 Nm, Use insulated magnet to retrieve the nuts after removal, The number of nuts on newer vehicles may vary
  61. Remove negative pack contactor from penthouse
    Informational PurposesAn informational icon, calling your attention
    Note
    2x guide pins
  62. Position negative pack contactor to penthouse for installation
    Informational PurposesAn informational icon, calling your attention
    Note
    Align the 2x guide pins
  63. Install nuts securing negative pack contactor to penthouse
    Informational PurposesAn informational icon, calling your attention
    Note
    3x nuts, 10mm, 8 Nm, Use insulated magnet as needed to position nuts onto studs, The number of nuts on newer vehicles may vary, Mark after torque
  64. Install bolt securing negative pack contactor to DC link busbar joint
    Informational PurposesAn informational icon, calling your attention
    Note
    1x patch bolt, 13mm, 9 Nm, Install new patch bolt, Mark after torque
  65. Install nut securing negative pack contactor to HV battery tall terminal
    Informational PurposesAn informational icon, calling your attention
    Note
    1x patch nut, 13mm, 9 Nm, Install new patch nut, Mark after torque
  66. Perform Hioki impedance test at HV joint of negative pack contactor to negative DC link busbar
    Informational PurposesAn informational icon, calling your attention
    Note
    1x HV joint, The acceptable resistance is between 0.020 mΩ (20 μΩ) and 0.060 mΩ (60 μΩ), If the resistance is greater than 0.060 mΩ (60 μΩ), stop work and escalate a Toolbox session. If the resistance is less than 0.020 mΩ (20 μΩ), reposition the probes and measure again.
  67. Perform Hioki impedance test at negative pack contactor to module 1 rear terminal
    Informational PurposesAn informational icon, calling your attention
    Note
    1x HV joint, 110μΩ or less
  68. Install HV joint insulators to negative pack contactor
    Informational PurposesAn informational icon, calling your attention
    Note
    2x insulators
  69. Connect ancillary bay harness connectors to negative pack contactor
    Informational PurposesAn informational icon, calling your attention
    Note
    2x connectors
  70. Install ancillary bay harness clip around negative pack contactor area
    Informational PurposesAn informational icon, calling your attention
    Note
    1x clip
  71. Remove pyro disconnect dummy
  72. Clean mating surfaces
    Informational PurposesAn informational icon, calling your attention
    Note
    Allow to 1 minute dry time,Use an IPA wipe to clean the HV mating surfaces of the shunt, busbar, and the pyrotechnic battery disconnect
  73. Set multimeter to "LoZ" (low impedance) mode
  74. Measure voltage between busbar and shunt
    Informational PurposesAn informational icon, calling your attention
    Note
    While still measuring the voltage, have an assistant position the pyrotechnic battery disconnect into the HV battery for installation. Make sure to align the pins of the connector with the new pyrotechnic battery disconnect, and then press the pyrotechnic battery disconnect down onto the busbars
  75. Position pyro disconnect to ancillary bay for installation
    Informational PurposesAn informational icon, calling your attention
    Note
    1x connector, Make sure to align the 2 pins with pyro disconnect, The pyro disconnect can only be installed one way
  76. Install bolts securing pyro disconnect to ancillary bay
    Informational PurposesAn informational icon, calling your attention
    Note
    2x patch bolts, 13mm, 9 Nm
  77. Measure resistance from module 2 busbar to pyro disconnect
    Informational PurposesAn informational icon, calling your attention
    Note
    1x HV joint, 60μΩ or less, Perform zero adjust to Hioki meter prior to testing
  78. Measure resistance from pyro disconnect to shunt
    Informational PurposesAn informational icon, calling your attention
    Note
    1x HV joint, 45μΩ or less, Perform zero adjust to Hioki meter prior to testing
  79. Remove service insulator kit
  80. Inspect ancillary bay walls for damage
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    Note
    Any dent or depression in the seal that causes it to not be flat will result in a leak, and cannot be reused, Any paint that comes off the ancillary bay wall, whether or not it sticks to the seal, will require enclosure leak test when reassembled, It can still be reused
  81. Inspect ancillary bay cover seal to confirm it has no visual damage
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    Note
    Image up close for clarity, Delaminated and torn seals cannot be reused
  82. Wipe ancillary bay cover with IPA to clean surface
    Informational PurposesAn informational icon, calling your attention
    Note
    Allow to 1 minute dry time
  83. Position ancillary bay cover to HV battery for installation
    Informational PurposesAn informational icon, calling your attention
    Note
    Ensure all accessible insulators are present, wearing Electrical Protective Gloves is not necessary once all HV components are covered.
  84. Remove HV insulating gloves
  85. Install bolts securing ancillary bay cover to HV battery
    Informational PurposesAn informational icon, calling your attention
    Note
    18x bolts, E10 5-Lobe, 8 Nm, Use E10 5-Lobe socket without magnet, Fasteners are captive, Follow torque sequence per image
  86. Install bolts securing ancillary bay cover to HVC
    Informational PurposesAn informational icon, calling your attention
    Note
    3x bolts, E10, 5 Nm + 30 degrees
  87. Remove logic cap and connect HVC logic connector
    Informational PurposesAn informational icon, calling your attention
    Note
    1x connector, 1x cap, Align connector then pull the handle to locking position get connector fully seated
  88. Connect 2nd row seat harness and secure cushion
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    Note
    2x clips, 2x connectors, Insert buckles through holes, Slide rear inward then align front clips, Perform push-pull-push test
  89. Connect first responder loop and LV battery
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    Note
    2x connectors, Secure FRL first, Seat LV battery connection and push black connector lock inwards to secure, Engage green locking tab when fully seated
  90. Install rear underhood apron
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    Note
    14x clips, Hold rear wall of frunk to keep from flexing while engaging front clips
  91. Close hood
  92. Move RH front seat to original position
  93. Move LH front seat to original position
  94. Raise all four windows
  95. Close all four doors