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

Solution

1. Preparation

• Gather required tools and parts.
• Disconnect the vehicle battery and allow at least 10 minutes for any residual voltage to dissipate.

Tools Required:

• OBD-II scanner
• Socket set
• Multimeter
• Torx screwdriver
• Wiring harness repair kit (if needed)

2. Inspect and Repair Wiring

• Remove the seat cushions and inspect the wiring harness and connectors under the seats.
• Repair any damaged wires using a wiring harness repair kit or replace the connectors if corroded.
• Ensure all connectors are securely attached and free from moisture.

3. Replace Faulty Components

• If diagnostic codes indicate a faulty airbag control module, remove the old module:

  1. Disconnect battery again for safety.
  2. Remove screws securing the module.
  3. Disconnect the wiring harness.
  4. Install the new module and reconnect all wiring securely.

• In case of faulty seatbelt pre-tensioners, follow the same steps to remove and replace.

4. Reconnect Battery and Reset System

• Reconnect the battery.
• Use the OBD-II scanner to clear any error codes and reset the airbag light.
• Perform a system check to ensure all components are functioning correctly.