why does my Toyota Highlander Third Generation (2014-2019) airbag light stay on

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface with the ignition off.
• Disconnect the negative terminal of the battery to prevent accidental airbag deployment.

2. Read and Clear Codes

• Connect the OBD-II scanner to the vehicle's diagnostic port.
• Retrieve and document any airbag-related trouble codes.
• Clear the codes and check if the airbag light remains off after restarting the vehicle.

3. Inspect Wiring and Connectors

• Reconnect the battery temporarily.
• Inspect the wiring harness under the seats and around the airbag control module.
• Look for frayed wires, corrosion, or loose connectors.
• Repair or replace any damaged wiring or connectors.

4. Check Seatbelt Sensors

• Locate the seatbelt sensors in the front seats.
• Disconnect the sensor connectors and inspect for corrosion or damage.
• Test the sensors with a multimeter for proper resistance.
• Replace any faulty seatbelt sensors.

5. Inspect Airbag Control Module

• If issues persist, remove the airbag control module from its mounting location.
• Inspect for physical damage or corrosion on the module connectors.
• Replace the airbag control module if it is found to be faulty.

6. Reconnect and Test

• Reconnect the battery's negative terminal.
• Perform a test drive to check if the airbag light remains off.
• Re-scan the OBD-II system to ensure that no new codes appear.