20/05/2024 02:54:44

Shunt - HV Battery (Non-Structural Pack) (Remove and Replace)

16303602 1.20 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.

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Warning

Only technicians who have been trained in High Voltage Awareness and have completed all required certification courses (if applicable) are permitted to perform this procedure. Proper personal protective equipment (PPE) and insulating HV gloves with a minimum rating of class 0 (1000V) must be worn at all times a high voltage cable, busbar, or fitting is handled. Refer to Tech Note TN-15-92-003, High Voltage Awareness Care Points for additional safety information.

Torque Specifications

Table 1. Torque Specifications: Shunt - HV Battery (Non-Structural Pack) (Remove and Replace)
Description Torque Value Recommended Tools Reuse/Replace Notes
Bolt that attaches the shunt assembly to the ancillary bay
9 Nm (6.6 lbs-ft)
  • Insulated tools:
    • 13 mm socket
    • 2 in extension
 Replace

Remove

  1. Remove the RH 2nd row seat back. See Seat Back - 2nd Row - RH (Remove and Replace).
  2. Remove the LH 2nd row seat back. See Seat Back - 2nd Row - LH (Remove and Replace).
  3. Remove the rear underhood apron. See Underhood Apron - Rear (Remove and Replace).
  4. Disconnect 12V power. See 12V/LV Power (Disconnect and Connect).
  5. Perform the vehicle electrical isolation procedure. See Vehicle HV Disablement Procedure.
  6. Remove the ancillary bay cover. See Cover - Ancillary Bay (Remove and Replace).
  7. Remove the pyrotechnic battery disconnect. See Pyrotechnic Battery Disconnect (Remove and Replace).
  8. Remove the shunt insulator. See Insulator - Shunt - HV Battery (Remove and Replace).
  9. Remove and discard the bolt that attaches the shunt assembly to the ancillary bay.
    Tip: Use of the following tool(s) is recommended:
    • Insulated tools:
      • 13 mm socket
      • 2 in extension
  10. Remove the shunt from the vehicle.

Install

  1. Perform a zero adjust of the Hioki resistance meter in preparation to measure resistances later in this procedure. See Resistance Meter (Zero Adjust).
  2. Record the 5-digit shunt resistance as printed at the bottom of the part number label of the new shunt, and then convert the resistance value to hexadecimal.
    Informational PurposesAn informational icon, calling your attention
    Note
    The resistance is in the range of 20000 to 30000 nano Ohms. For example, "R:25819nΩ" is a resistance of 25819 nano Ohms, so record "25819".
    Informational PurposesAn informational icon, calling your attention
    Note
    Skip this step if installing the original shunt.
  3. Use an IPA wipe to clean the HV mating surfaces of the shunt, busbar, and the pyrotechnic battery disconnect.
  4. Install the shunt to the busbar, and then install and hand-tighten a new bolt to attach the shunt to the busbar.
  5. Measure the voltage across the pyrotechnic battery disconnect mount points, and then install the pyrotechnic battery disconnect. See Pyrotechnic Battery Disconnect (Remove and Replace).
  6. Torque the bolt that attaches the shunt assembly to the ancillary bay.
    9 Nm (6.6 lbs-ft)
    Tip: Use of the following tool(s) is recommended:
    • Insulated tools:
      • 13 mm socket
      • 2 in extension
  7. Install the shunt insulator. See Insulator - Shunt - HV Battery (Remove and Replace).
  8. Use the Hioki resistance meter to measure the resistance of the HV joint between the shunt and the adjacent busbar.
    Informational PurposesAn informational icon, calling your attention
    Note
    The maximum acceptable resistance is 0.045 mΩ (45 μΩ). If the resistance is above this value, escalate a Toolbox session, as appropriate.
  9. Install the ancillary bay cover. See Cover - Ancillary Bay (Remove and Replace).
  10. Install the LH 2nd row seat back. See Seat Back - 2nd Row - LH (Remove and Replace).
  11. Install the RH 2nd row seat back. See Seat Back - 2nd Row - RH (Remove and Replace).
  12. Install the 2nd row lower seat cushion. See Seat Cushion - Lower - 2nd Row (Remove and Replace).
  13. Connect 12V power. See 12V/LV Power (Disconnect and Connect).
  14. Skip step 15 through step 19 if installing the original shunt.
  15. Connect an LV maintainer. See LV Maintainer (Connect and Disconnect).
  16. Connect the laptop with Toolbox 3 to the vehicle.
  17. In Toolbox, select the Actions/Autodiag tab, type "HVP write shunt ohm" into the search field, and then click HVP write shunt ohm, type the shunt resistance value in hexadecimal format from step 2, then click Run Network, and allow the routine to complete.
    Informational PurposesAn informational icon, calling your attention
    Note
    If the routine fails, repeat from step 17.
  18. Disconnect the laptop from the vehicle.
  19. Disconnect an LV maintainer. See LV Maintainer (Connect and Disconnect).
  20. Install the rear underhood apron. See Underhood Apron - Rear (Remove and Replace).