1. Code Reading:
- Connect a scan tool to the vehicle's OBD-II port.
- Turn the ignition key to the "On" position without starting the engine.
- With the scan tool, read and record any codes related to the airbag system. Common codes include:
- B1000 - SRS Control Unit Memory Backup
- B1141 - Driver Airbag Circuit Open
- B1151 - Passenger Airbag Circuit Open
- B1342 - Seat Belt Pretensioner Circuit Open
- B1620 - Airbag Deployment Circuit Open
2. Fault Inspection:
- Visually inspect the airbag system components for any obvious damage or disconnection.
- Check all wiring harnesses related to the airbag system, especially under the seats, steering column, and dashboard.
- Make sure all connectors are properly seated and free from corrosion.
3. Sensor Repair:
- If the code indicates a faulty sensor, replace the affected sensor (e.g., seat belt buckle switch, impact sensor).
- Use Lexus genuine replacement parts to ensure compatibility and safety.
4. Airbag Module Reset:
- Once you've repaired or replaced the faulty components, you may need to reset the airbag module.
- Follow the specific instructions in the vehicle repair manual or consult with a professional.
5. Warning Light Confirmation:
- After performing the repairs and resetting the airbag module, start the vehicle and check if the airbag warning light is still illuminated.
- If it remains lit, there might be a more complex issue that requires a professional diagnosis by an experienced technician.
Note: If the SRS, Airbag, or any related warning lights persist after following these steps, it's essential to seek assistance from a certified Lexus technician. Airbag systems involve safety-critical components, so proper diagnostics and repairs are crucial to ensure the proper functioning of the airbag system in the event of a collision.
