why does my Volkswagen Golf MK7 (2015-2019) airbag light stay on

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, basic hand tools (screwdrivers, socket set).
• Ensure the vehicle is parked on a flat surface and the ignition is turned off.
• Disconnect the negative battery terminal to prevent accidental deployment of airbags.

2. Retrieve and Analyze Codes

• Connect the OBD-II scanner to the vehicle’s diagnostic port.
• Turn the ignition to the "On" position (do not start the engine).
• Retrieve and note any DTCs related to the airbag system.
• Research the codes to determine the specific issues indicated.

3. Inspect Wiring and Connectors

• Remove any necessary panels to access airbag wiring and connectors.
• Visually inspect all connectors for corrosion, damage, or loose connections.
• Use a multimeter to test for continuity in airbag wiring.

4. Address Specific Faults

• If the seat occupancy sensor is faulty, replace it according to the manufacturer’s specifications.
• If wiring issues are found, repair or replace damaged sections as needed.
• If the airbag control module is faulty, replace it following proper procedures (ensure to program the new module if necessary).

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any stored fault codes in the airbag system.
• Turn the ignition on and check if the airbag light remains illuminated.