2026-09-10

Vehicle HV Disablement Procedure

Correction code 17010000 0.30 NOTA: Salvo diversa ed esplicita indicazione nella procedura, il codice modifica e il relativo FRT associato, riflettono tutto il lavoro richiesto per l'esecuzione di questa procedura, incluse le procedure collegate. Non cumulare i codici modifica a meno che non venga detto esplicitamente di farlo. NOTA: Consultare la Tempistica tariffe fisse per saperne di più sui tempi forfettari e su come essi vengono creati. NOTA: Consultare Protezione personale per assicurarsi di indossare i DPI adatti quando si esegue la procedura descritta di seguito. NOTA: Vedere per le pratiche di lavoro in sicurezza.

  • 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.
  • 2025-11-26: Added note to keep HV gloves on if procedure that required disablement involves touching HV components.
  • 2025-10-22: Added info in measurement table on GND point to be used for Negative (-) Lead, modified measurement sequence.
  • 2025-03-24: Added warning for regional tooling regulations.
  • 2025-01-30: Clarified B+ and B- probe step.
  • 2024-10-21: Rearranged multimeter probing images to align with HV measurement table.
  • 2024-06-05: Added warning to measure the specified order of locations for high voltage.
  • 2023-12-12: Updated voltage measurement order.
  • 2023-12-05: Updated references to other Vehicle Isolation Procedures.
  • 2023-11-08: Added/updated HV insulating glove steps.
  • 2023-08-30: Added a tip about replacing the probe to the multimeter-related step.
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.
Warning
Togliere tutti i gioielli (orologi, bracciali, anelli, collane, orecchini, medagliette, piercing, ecc.) e tutti gli oggetti (chiavi, monete, penne, matite, strumenti, dispositivi di fissaggio, ecc.) dalle tasche prima di eseguire qualsiasi procedura in presenza di alta tensione.
Warning
Se è necessario indossare occhiali da vista per eseguire in sicurezza qualsiasi procedura, assicurarsi che gli occhiali siano fissati saldamente alla testa e non possano cadere.
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

Solo i tecnici che hanno completato tutti i corsi di certificazione richiesti sono autorizzati a eseguire questa procedura. Tesla raccomanda ai tecnici di fornitori di terze parti di seguire una formazione equivalente prima di svolgere la presente procedura. Per maggiori informazioni sui requisiti dei Tecnici Tesla, o per le descrizioni degli argomenti richiesti per i tecnici di fornitori terzi, vedere i Requisiti per certificazioni HV. Ogni volta che si maneggia un raccordo, una barra di distribuzione o un cavo ad alta tensione è necessario indossare idonei dispositivi di protezione individuale (DPI) e guanti isolanti per l'alta tensione con classe di protezione minima 0 (1000 V). Per ulteriori informazioni sulla sicurezza, fare riferimento alle Note tecniche relative ai rischi dell'alta tensione TN-15-92-003, "High Voltage Awareness Care Points".

Equipment:
  • 1083188-01-B - Digital Multimeter Unit, EXTECH 355
  • 1754057-00-A - CURRENT PROBE, GEN, CLAMP, DC, 600V
  • 1140311-00-A - LEVER LOCK, HV CONNECTOR, MODEL 3
  • 1115247-01-A - Electronic Test Lead, CAT IV 1000V
  • 1130480-02-B - Slim Test Probes, CAT III 1000V

Procedure

Note
This procedure is for Non-Structural Pack 5 seat vehicles. For instructions on checking HV disablement on Non-Structural Pack 7 seat vehicles, see Vehicle HV Disablement Procedure (7-Seater). For instructions on checking HV disablement on Structural Pack 5 seat vehicles, see Vehicle HV Disablement Procedure (Structural Pack).
  1. Disconnect 12V/LV power. See 12V/LV Power (Disconnect and Connect).
  2. Set the multimeter to measure voltage, and then measure the voltage across the 12V/LV auxiliary battery terminals.
    Note
    For LV (Li-Ion) auxiliary battery: if the voltage across the battery terminals is 0, the battery may have switched off internally. Use a 12V Lead Acid battery for testing. For mobile technicians: use the 12V Lead Acid battery in the Mobile Service vehicle.
    CAUTION
    For LV (Li-Ion) auxiliary battery: 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.
    CAUTION
    For 12V (Lead Acid) auxiliary battery: if the voltage measured is less than 10 volts or greater than 14 volts, the multimeter is not measuring reliably and must not be used.
  3. Remove the rear aero shield panel. See Panel - Aero Shield - Rear (Remove and Replace).
  4. Remove the rear skid plate. See .
  5. Install the current clamp meter onto one cable of the rear drive unit HV harness.
    Note
    Make sure the meter is zeroed out and is facing the correct direction as shown.
  6. Measure the current in the HV cable.
    • If the current is within the range of -0.5 A to 0.5 A, 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.
  7. Remove the clamp meter from the cable.
  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. Disconnect the connector that attaches the rear drive unit HV cable to the HV battery.
    Note
    Release the locking tab and rotate the release lever up to disengage the connector. 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.
    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. See .
  17. Install the rear aero shield panel. See Panel - Aero Shield - Rear (Remove and Replace).
  18. Connect 12V/LV power. See 12V/LV Power (Disconnect and Connect).
  19. Return to the procedure that required the vehicle to be electrically isolated.
    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.
    Note
    If you are no longer exposed to high voltage, the HV insulating gloves may be removed.