why does my Tesla Model S Original (2012-2020) airbag light stay on

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and ensure it is powered off.
• Disconnect the negative battery terminal to prevent accidental deployment of airbags.

2. Scan and Identify Fault Codes

• Connect the OBD-II scanner to the vehicle’s diagnostic port.
• Retrieve and document any error codes related to the airbag system.
• If codes are present, note specific codes related to sensors, wiring, or the airbag control module.

3. Inspect Wiring and Connectors

• Visually inspect the airbag wiring harness and connectors for any damage.
• Ensure that all connections are secure and free from corrosion.
• If any damage is noted, repair or replace the affected wiring or connectors.

4. Test Airbag Sensors

• Check the seat occupancy sensors by activating them according to the manufacturer’s specifications.
• Use a multimeter to test for continuity and resistance in the sensor circuits.
• Replace any faulty sensors as indicated by diagnostic results.

5. Replace Airbag Control Module (if necessary)

• If the airbag control module is found to be faulty based on error codes:
  • Remove the module from its mounting location.
  • Disconnect all electrical connectors.
  • Install the new airbag control module and reconnect all connectors.
  • Secure the module in place.

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any stored error codes.
• Conduct a system check to ensure the airbag light is no longer illuminated.