2025-02-03

Vehicle HV Disablement Procedure (Test/Adjust)

Correction code 17010000 0.24 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.

  • 2025-01-30: Clarified B+ and B- probe step.
  • 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 (PTC heater, 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.
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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.
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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.
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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
Make sure that the multimeter and leads are capable of handling at least 500V DC.
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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.
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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 IconA warning icon, calling your attention to a possibly risky situation
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.

  • 1076921-00-A FLUKE DIGITAL MULTIMETER 1587
  • 1059330-00-B Skt, 1/4in Dr, 5-Lobe Torx Plus External
  • 1130480-02-A Slim Test Probes

Procedure

  1. Disconnect LV power. See LV Battery - Li-lon (Disconnect and Connect) (Modify).
  2. Set the multimeter to measure voltage, and then measure the voltage across the LV auxiliary battery terminals.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    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.
  3. Remove the 2nd row lower seat cushion. See Seat Cushion - 2nd Row (Remove and Replace).
  4. Remove all jewelry and empty your pockets before continuing this procedure.
  5. Put on HV insulating gloves, leather outer gloves, and safety glasses before continuing this procedure.
  6. Remove the HV probe cover. See Probe Lid - Ancillary Bay Cover (Remove and Replace).
  7. Use the multimeter to probe the voltages.
    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.
    Measurement Order

    Component Test

    B+

    Probe opening, closer to HV DC connector)

    B-

    Probe opening, closer to HV Processor Logic connector)

    GND

    Measured Voltage less than 10 V

    Measured Voltage 10 V or more
    1

    HV

    Positive (+) Lead

    Negative (-) Lead

    Pass

    Fail

    Perform a HV battery contactor seize check. See HV Battery Contactor Seize Check (Test/Adjust).
    2

    HV battery negative contactor

    Positive (+) Lead

    Negative (-) Lead

    Pass

    Fail

    HV battery negative contactor might be seized. See HV Battery Contactor Seize Check (Test/Adjust).
    3

    HV battery positive contactor

    Positive (+) Lead

    Negative (-) Lead

    Pass

    Fail

    HV battery positive contactor might be seized. See HV Battery Contactor Seize Check (Test/Adjust).
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • Electrical Protective Gloves
    • Slim Test Probes - 1130480-02-A
    • Fluke 1587 - 1076921-00-A
    Figure 1. B+ to Ground measurement
    Figure 2. B- to Ground measurement
    Figure 3. B+ to B- measurement
  8. Install the HV probe cover. See Probe Lid - Ancillary Bay Cover (Remove and Replace).
  9. Return to the procedure that required the vehicle to be electrically isolated.