2025-03-12

High Voltage Ancillary Harness (Remove and Install)

Correction code 4450010202 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 LaborTimeFeedback@tesla.com. NOTE: See Personal Protection to make sure wearing proper PPE when performing the below procedure.

Remove

  1. Perform the vehicle HV disablement procedure. See Vehicle HV Disablement Procedure.
  2. Remove the rear HV battery skid plate. See High Voltage Battery Assembly - Skid Plate - Rear (Remove and Replace).
  3. Position a coolant drain container underneath the RH rear of the HV battery.
  4. Disconnect the RH coolant hose from the rear of HV battery, and plug the ends of fittings as soon as possible to avoid coolant loss.
  5. Remove the coolant drain container from underneath the RH rear of the HV battery.
  6. Disconnect the AC HV harness connector from the right rear of HV battery.
    Informational PurposesAn informational icon, calling your attention
    Note
    Release the red tab before releasing the black locking lever.
  7. Remove the front HV battery skid plate. See Front Skid Plate (Remove and Replace).
  8. Disconnect the AC compressor HV harness connector.
    Informational PurposesAn informational icon, calling your attention
    Note
    Disengage the red locking tab by pulling it away from the connector, then depress the orange tab and pull the connector outward, and then depress the green tab to release the connector.
  9. Remove the clips (x2) that attach the ancillary harness bracket to the front of HV battery.
  10. Remove the ancillary harness downwards from below the HV battery and manifold tube.
  11. With assistance, remove the bolts (x6) that attach the center ski cover to the HV battery.
    Informational PurposesAn informational icon, calling your attention
    Note
    The bolts at both ends are short bolts and the bolts in the middle are long.
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • External Torx Plus EP14
  12. Remove the upper cap covers from both FDU and RDU sides of the center ski cover. See Bracket - High Voltage - Ski - Top (Remove and Replace).
  13. Remove the HV ancillary harness.

Install

  1. Position the ancillary harness onto the HV battery center ski.
    Informational PurposesAn informational icon, calling your attention
    Note
    Ensure that the installation direction is consistent with the arrow direction on the center ski cover.
    Informational PurposesAn informational icon, calling your attention
    Note
    Use zip ties as the starting point for wiring.
  2. Install the upper cap covers to both FDU and RDU sides of the center ski cover. See Bracket - High Voltage - Ski - Top (Remove and Replace).
  3. With assistance, install the bolts (x6) that attach the center ski cover to the HV battery.
    34 Nm (25.1 lbs-ft)
    Informational PurposesAn informational icon, calling your attention
    Note
    The bolts at both ends are short bolts and the bolts in the middle are long.
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • External Torx Plus EP14
  4. Route the ancillary harness upwards from below the HV battery and manifold tube.
  5. Install the clips (x2) that attach the ancillary harness bracket to the front of HV battery.
  6. Connect the AC compressor HV harness connector.
    Informational PurposesAn informational icon, calling your attention
    Note
    After the connector is seated and there is an audible click, push the red locking tab to double-lock the connector.
  7. Install the front HV battery skid plate. See Front Skid Plate (Remove and Replace).
  8. Connect the AC HV harness connector to the right rear of HV battery.
    Informational PurposesAn informational icon, calling your attention
    Note
    Hold the connector level with header and secure with even upward force. Rotate the lever arm and secure locking tab. Verify that the latch is fully secured and not damaged.
  9. Remove the plugs on the ends of fittings, and then connect the RH coolant hose to the rear of HV battery.
    Informational PurposesAn informational icon, calling your attention
    Note
    Perform a push-pull-push test to make sure that the hose is fully secured.
    Informational PurposesAn informational icon, calling your attention
    Note
    Coolant loss greater than 1L requires vacuum fill.
  10. Install the rear HV battery skid plate. See High Voltage Battery Assembly - Skid Plate - Rear (Remove and Replace).
  11. Install the 2nd row seat cushion. See 2nd Row Seat Cushion (Remove and Replace).
  12. Connect the LV battery power. See LV Power (Disconnect and Connect).
  13. Refill the cooling system. See Cooling System (Partial Refill And Bleed) (Modify).
  14. Install the HEPA filter assembly. See Hepa Filter (Remove and Replace).