2026-09-18

Vehicle HV Disablement Procedure

Correction code 17010000 FRT 0.48 NOTE: Unless otherwise explicitly stated in the procedure, the correction code and its associated 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. NOTE: See Personal Protection to make sure you are wearing proper PPE when performing the procedure below. NOTE: See Ergonomic Precautions for safe and healthy working practices.

  • 2026-09-10: Updated the procedure to use the amp clamp and voltage measurement method at the rear drive unit cables from underneath the vehicle.
  • 2025-12-04: Added note not to remove HV leather gloves if procedure that requires isolation involves handling HV components.
  • 2025-10-22: Updated measurement table.
  • 2025-03-24: Added warning for regional tooling regulations and updated B+ and B- descriptions.
Warning
This procedure verifies that high voltage power is no longer available to high voltage components (PTC heater, A/C compressor, inverters, etc). Perform this procedure before servicing high voltage components.
Warning
Remove all jewelry (watches, bracelets, rings, necklaces, earrings, ID tags, piercings, etc.) from your person, and all objects (keys, coins, pens, pencils, tools, fasteners, etc.) from your pockets before performing any procedure that exposes you to high voltage.
Warning
If corrective eyewear is necessary to safely perform any procedure, make sure that the eyewear is securely restrained to the head and cannot fall off.
Warning
Always wear High Voltage (HV) gloves and safety glasses when handling any high voltage component, including test equipment. Before each use, test gloves using an authorized glove tester and verify that the testing date on the gloves has not expired.
Warning
All repair and operating instructions should be reviewed and understood before working on Tesla vehicles, associated components, or associated repair equipment.
Warning
Assume that high voltage is present at all times when working on a Tesla vehicle, associated high voltage components, or associated high voltage test equipment until proven otherwise. Be aware that energy states can change during testing, so err on the side of caution.
Warning
Always have an electrical safety hook in the area when working with HV components. Electrical safety hooks are used to remove an injured person from a live high voltage circuit without risking additional injury.
Warning
Use a high voltage digital multimeter to check for the presence of high voltage on both sides of the connector every time a high voltage connector is disconnected.
Warning
In certain regions, a Voltage Absence Tester (VAT) is required for this procedure, and the use of a multimeter is not allowed. Always adhere to local or regional tooling regulations.
Warning
Make sure that the multimeter and leads are capable of handling at least 500V DC.
Warning
Obey all instructions when using test equipment or servicing a Tesla vehicle or associated high voltage components. If repair instructions are not clear or if there are any questions about how to use the test equipment, escalate a Toolbox session before proceeding.
Warning
If any test equipment fails to operate as expected, do not attempt to diagnose or repair the vehicle. Follow the appropriate lock out – tag out procedure for the equipment, notify your manager.
Warning
When using test equipment, make sure that all cables are connected before turning equipment on or otherwise initiating use.
Warning
High voltage is present on battery recovery chargers whenever the HV LEDs are lit. However, indicators and LEDs can fail. Do not assume that if an LED is not lit no high voltage is present. Assume high voltage is present at all times until proven otherwise by use of a multimeter.
Warning

Only technicians who have completed all required certification courses are permitted to perform this procedure. Tesla recommends third party service provider technicians undergo equivalent training before performing this procedure. For more information on Tesla Technician requirements, or descriptions of the subject matter for third parties, see HV Certification Requirements. 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.

Equipment:
  • 1076921-00-B INSULATION MULTIMETER FLUKE 1507
  • 1059330-00-B Skt, 1/4in Dr, 5-Lobe Torx Plus External
  • 1130480-02-B Slim Test Probes

Procedure

  1. Open all four doors and lower all four windows.
  2. Disconnect the LV power. See LV Power (Disconnect and Connect) (Modify).
  3. Set the multimeter to DC voltage and confirm it is properly measuring voltage by measuring the voltage across the LV auxiliary battery terminals.
    CAUTION
    If the voltage across the battery terminals is less than 13 volts or greater than 16 volts, the multimeter is not measuring reliably and must not be used.
  4. Remove the rear aero shield. See Aero Shield - Rear (Remove and Replace).
  5. Remove the rear skid plate from the HV battery. See Skid Plate - Rear (Remove and Replace).
  6. Install the current clamp meter onto one cable of the rear drive unit HV harness.
    Note
    Make sure the meter is facing the correct direction as shown.
  7. Measure the current at the rear drive unit HV harness.
    • If the current is within the range of -0.5 A to 0.5 A, remove the clamp from the harness and continue to the next step.
    • If the current is outside the range of -0.5 A to 0.5 A, for example -0.8 A or 1.3 A, re-perform the vehicle electrical isolation again to make sure that all was properly shut down. If the measurement is still outside the range of -0.5 A to 0.5 A, escalate for assistance.
    Warning
    DO NOT DISCONNECT any HV harness when the current measurement is outside the range of -0.5 A to 0.5 A.
  8. Remove the nut that attaches the rear drive unit HV cable bracket to the HV battery.
    Note
    The number of the fasteners may vary.
    Tip
    Use of the following tool(s) is recommended:
    • 10 mm socket
  9. Remove all jewelry and empty your pockets before continuing this procedure.
  10. Inspect and put on HV insulating gloves, leather outer gloves, and safety glasses before continuing this procedure.
  11. Release the locking tab and rotate the release lever up to disengage the connector that attaches the rear drive unit HV cable to the HV battery.
    Note
    Do not force the release lever up. Ensure the alignment tabs on the rear drive unit header are not damaged
  12. Use the high voltage multimeter with CAT III probes to verify that no high voltage is present at the rear drive unit HV header.
    Warning
    In order to limit potential exposure to high voltage, measure for high voltage in the order specified below.
    Measure the following voltages:
    1. B+ to ground
    2. B- to ground
    3. B+ to B-
    Warning
    If any voltage is greater than 10V, the contactors are closed or welded. Escalate to Service Engineering.
  13. Make sure the connector lock is 90 degrees from the connector, and then connect the connector that attaches the rear drive unit HV cable to the HV battery.
    Note
    Use one hand to support the connector while the other latching the locking tab. Once installed, verify that the latch is not damaged and is fully secured in the latched position.
  14. Remove the leather over gloves and the HV insulating gloves.
  15. Install the nut that attaches the rear drive unit HV cable bracket to the HV battery.
    10 Nm (7.4 lbs-ft)
    Note
    The number of the fasteners may vary.
    Tip
    Use of the following tool(s) is recommended:
    • 10 mm socket
  16. Install the rear skid plate from the HV battery. See Skid Plate - Rear (Remove and Replace).
  17. Install the rear aero shield. See Aero Shield - Rear (Remove and Replace).
  18. Connect the LV power. See LV Power (Disconnect and Connect) (Modify).
    Warning
    DO NOT perform this step if the electrical isolation was required by another procedure. Return to that procedure after the vehicle is electrically isolated.
  19. Raise all four windows and close all four doors.