15/12/2023 01:28:29

Vehicle Electrical Isolation Procedure

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.

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

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

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 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.

1083188-00-B FLUKE DIGITAL MULTIMETER 115
1130480-00-A Test Probes, Slim, Fluke TP38

Procedure

Note

This procedure is for Non-Structural Pack 5 seat vehicles. For instructions on checking isolation on Non-Structural Pack 7 seat vehicles, see Vehicle Isolation Procedure (7-Seater). For instructions on checking isolation on Structural Pack 5 seat vehicles, see Vehicle Electrical Isolation Procedure (Structural Pack).

Disconnect 12V/LV power. See 12V/LV Power (Disconnect and Connect).
Remove the 2nd row lower seat cushion. See Seat Cushion - Lower - 2nd Row (Remove and Replace).
Set the multimeter to measure voltage, and then measure the 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.
Remove all items from pockets and ensure not wearing metal items.
Inspect HV insulating gloves.

Note
Check gloves for damage prior to use, Refer to service document TN-15-92-003 R1, for information on inspecting HV gloves.
Put on HV insulating gloves, leather outer gloves, and safety glasses.

Warning
Continue to wear the gloves until instructed to remove them.
Remove the HV probe cover. See Cover - HV Probe - HV Battery (Remove and Replace).

Use the multimeter to probe the voltages.


Component Test	B+ (LH probe opening)	B- (RH probe opening)	GND	Measured Voltage Less Than 10 V	Measured Voltage 10 V Or More
HV battery positive contactor	Positive (+) Lead		Negative (-) Lead	Pass	Fail HV battery positive contactor might be seized. See HV Battery Contactor Seize Check.
HV battery negative contactor		Positive (+) Lead	Negative (-) Lead	Pass	Fail HV battery negative contactor might be seized. See HV Battery Contactor Seize Check.
HV	Positive (+) Lead	Negative (-) Lead		Pass	Fail Perform a HV battery contactor seize check. See HV Battery Contactor Seize Check.

Tip: Use of the following tool(s) is recommended:

Electrical Protective Gloves
Slim Test Probes - 1130480-02-A
Fluke 1587 - 1076921-00-A

Install the HV probe cover. See Cover - HV Probe - HV Battery (Remove and Replace).
Install the 2nd row lower seat cushion. See Seat Cushion - Lower - 2nd Row (Remove and Replace).
Return to the procedure that required the vehicle to be electrically isolated.

Note
If you are no longer exposed to high voltage, the HV insulating gloves may be removed.