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Home/Cars/Tesla/Model S/Plaid/Refresh (2021-present)/why does my Tesla Model S Original (2012-2020) airbag light stay on

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

Tesla Model S Plaid/Refresh (2021-present)

Severity: highDifficulty: medium2-4 hours
3 min read
540 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix the airbag light issue on Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Component
Electrical
Repair Time
2-4 hours

Safety Warnings

  • ⚠Always disconnect the battery before working on the airbag system to avoid accidental deployment.
  • ⚠Allow the vehicle to sit for at least 10 minutes after disconnecting the battery before proceeding with repairs.

Symptoms

  • •Airbag warning light continuously illuminated on the dashboard
  • •Possible warning messages displayed on the screen related to the airbag system
  • •Lack of deployment during crash simulations (if tested)
  • •Other electrical system warnings may also be present
  • •Unusual behavior in other safety systems, like traction control or stability control

Diagnostic Steps

  1. 1Scan the vehicle's onboard diagnostic system using an OBD-II scanner to retrieve any error codes related to the airbag system.
  2. 2Inspect the airbag system components visually, including connectors and wiring harnesses under the seats and dashboard for damage or disconnection.
  3. 3Check the vehicle's 12V battery voltage and state of charge; low voltage can affect the airbag system functionality.
  4. 4Review the airbag control module for fault codes and perform a reset if necessary.
  5. 5Inspect for any recent repairs, modifications, or accidents that may have affected the airbag system.

Solution

Solution

1. Preparation

  • Gather required tools and parts.
  • Disconnect the vehicle's 12V battery to ensure safety while working on the airbag system.
  • Wait at least 10 minutes before proceeding to allow capacitors within the airbag system to discharge.

2. Inspect and Repair Wiring

  • Tools Required: Wire stripper, crimping tool, heat shrink tubing.
  • Visually inspect the wiring harness for any signs of wear, fraying, or disconnection, especially around the seatbelt and seat connection points.
  • Repair any damaged wiring by cutting out the damaged section, stripping the ends, and using appropriate connectors to splice in new wire. Ensure connections are secure and insulated with heat shrink tubing.

3. Replace Faulty Components

  • Parts Required: Airbag module or connectors (if identified as faulty).
  • If any components have been identified as faulty during diagnosis, replace them with OEM parts.
  • Follow manufacturer guidelines for installation, ensuring all connectors click into place securely.

4. Reset Airbag Control Module

  • Tools Required: OBD-II scanner capable of resetting airbag codes.
  • Reconnect the vehicle's 12V battery.
  • Use the OBD-II scanner to clear any fault codes from the airbag control module.
  • Verify that the airbag warning light turns off after the reset.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Wire stripper
  • Crimping tool
  • Heat shrink tubing
  • Torque wrench

Parts Required

  • Airbag module or connectors (if identified as faulty)
  • Electrical connectors or wiring harness (if damaged)

Additional Information

Component

Electrical

Repair Time

2-4 hours

Difficulty

medium

Severity

high

Tools

5 items

Parts

2 items

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