how to fix B1101 code in Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, torque wrench.
• Ensure the vehicle is parked on a level surface with the ignition off.
• Disconnect the negative battery terminal to prevent accidental airbag deployment.

2. Inspect and Repair Wiring

• Remove the seat from the vehicle:
  1. Disconnect the battery as mentioned.
  2. Unbolt the seat from the floor using the socket set.
  3. Carefully lift the seat out, being cautious of any connected wiring.
• Inspect the wiring harness under the seat:
  1. Check for frayed or damaged wires.
  2. Ensure all connections to the seat occupancy sensor are secure.
• Repair or replace any damaged wiring as necessary.

3. Seat Occupancy Sensor Testing

• Locate the seat occupancy sensor, usually embedded in the seat cushion.
• Use a multimeter to check the sensor:
  1. Disconnect the sensor's connector.
  2. Measure the resistance across the sensor terminals.
  3. Compare the reading to the manufacturer’s specifications (usually found in the service manual).
• Replace the seat occupancy sensor if the resistance is out of spec.

4. Reassemble and Reconnect

• Reinstall the seat in the vehicle:
  1. Position the seat back into place and bolt it down with the torque wrench to the manufacturer's specified torque.
  2. Reconnect all wiring harnesses securely.
• Reconnect the negative battery terminal.

5. Final Testing

• Use the OBD-II scanner to clear the B1101 code.
• Start the vehicle and check if the airbag warning light remains off.
• Conduct a test drive to ensure the airbag system operates correctly.