2026-01-07

Vehicle HV Disablement Procedure (Test/Adjust)

Correction code 17010000 FRT 0.36 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 Precautions for safe and healthy working practices.

  • 2026-01-07: Added more detail and acceptable current range for current measurement step.
  • 2025-12-04: Added note not to remove HV leather gloves if procedure that requires isolation involves handling HV components.
  • 2025-03-24: Added warning for regional tooling regulations.
  • 2024-06-05: Added warning to measure the specified order of locations for high voltage.
Warning IconA warning icon, calling your attention to a possibly risky situation
Warning
This procedure verifies that high voltage power is no longer available to high voltage components (A/C compressor, inverters, etc). Perform this procedure before servicing high voltage components.
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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.
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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 IconA warning icon, calling your attention to a possibly risky situation
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.
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Warning
All repair and operating instructions should be reviewed and understood before working on Tesla vehicles, associated components, or associated repair equipment.
Warning IconA warning icon, calling your attention to a possibly risky situation
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 always use caution.
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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.
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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.
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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.
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Warning
Make sure that the insulation meter and leads are capable of handling at least 1000 VDC.
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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.
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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.
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Warning
When using test equipment, make sure that all cables are connected before turning equipment on or otherwise initiating use.
Warning IconA warning icon, calling your attention to a possibly risky situation
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.
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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 glove and safety information.

  • 1076921-00-B, Insulation Multimeter, Fluke 1507
  • 1130480-00-A, Test Probes, Slim, Fluke TP38

Disable

  1. Raise and support the vehicle. See Raise Vehicle - 2 Post Lift.
  2. Remove the rear underhood apron. See Underhood Apron - Rear (Remove and Install).
  3. Disconnect MV power. See Disconnect MV Power (Modify).
  4. Verify the operation of the multimeter.
    Informational PurposesAn informational icon, calling your attention
    Note
    Set multimeter to DC voltage. Confirm multimeter is properly measuring voltage by testing MV battery. Touch lightly and do not damage terminals.
  5. Remove the mid aeroshield. See Skid Plate - Rear (Remove and Install).
  6. Remove all items from pockets and ensure that you are not wearing metal items.
  7. 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.
  8. Put on HV insulating gloves and leather over gloves.
  9. Power on the current clamp meter and set it to measure DC amps ("Adc"). Zero out the meter.
  10. Install a current clamp to a single cable on the RDU HV harness. If the meter measures within the range of -0.5 A to 0.5 A, proceed to the next step.
    Informational PurposesAn informational icon, calling your attention
    Note
    Make sure that the meter is facing the correct direction as shown.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    If the meter measures outside the range of -0.5 A to 0.5 A, do not proceed to the next step. In this case, start vehicle electrical isolation again to make sure that all was properly shut down. Escalate for assistance as required.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    DO NOT DISCONNECT any HV harnesses when the current measurement is outside of the acceptable range.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    Wear PPE (HV gloves, safety glasses) when working on high voltage components.
  11. Disconnect the RDU harness from the HV header.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    Make sure to wear PPE (HV gloves, safety glasses) when working on high voltage component.
    Informational PurposesAn informational icon, calling your attention
    Note
    Release locking tab and rotate the release lever up to disengage the connector. Release the harness clip. Do not force the release lever up.
    Informational PurposesAn informational icon, calling your attention
    Note
    Make sure the alignment tabs on the RDU header are not damaged.
  12. Use the insulation multimeter to measure for HV according to the sequence of locations specified below.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    If voltage is greater than 10 V, the pack contactors are not open or are welded. Stop work and reach out to Service Engineering.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    Wear appropriate PPE (HV gloves, safety glasses) when working on high voltage components.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    In order to limit potential exposure to high voltage, measure for high voltage in the order specified below.
    1. B+ to ground
    2. B- to ground
    3. B+ to B-
    Figure 1. B+ to Ground
    Figure 2. B- to Ground
    Figure 3. B+ to B-
  13. Return to the procedure that required the vehicle to be electrically isolated.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    Follow all safety instructions and PPE requirements of the procedure that required the vehicle to be electrically isolated. Do not remove the HV gloves if the procedure requires you to handle high voltage cables, busbars, or fittings.

Reenable

  1. Connect the RDU connector to the HV header.
    Informational PurposesAn informational icon, calling your attention
    Note
    Verify that the lever is in the upright (open) position. Carefully seat the connector, then fully close the lever and verify that the red tab is locked.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    Be careful not to damage any pins.
  2. Remove leather over gloves and HV insulating gloves.
  3. Install the mid aeroshield. See Skid Plate - Rear (Remove and Install).
  4. Reconnect MV power. See Disconnect MV Power (Modify).
  5. Install the rear underhood apron. See Underhood Apron - Rear (Remove and Install).
  6. Remove the vehicle from the lift. See Raise Vehicle - 2 Post Lift.