how to fix B0101 code for airbag in Toyota Corolla E210 (2019-2024)?

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, wiring repair kit.
• Disconnect the negative battery terminal and wait at least 10 minutes to ensure airbag system capacitors are discharged.

2. Inspect and Repair Wiring

• Visually inspect the wiring harness leading to the driver's airbag for damage or disconnection.
• If damage is found, use the wiring repair kit to splice or replace the damaged section. Ensure proper insulation of repaired wires.
• Reconnect any loose connectors, ensuring a secure fit.

3. Replace Driver's Airbag Module (if necessary)

• Tools Required: Socket set, torque wrench.
• Remove the driver's side airbag module by unscrewing the securing bolts using a socket set.
• Disconnect the airbag connector carefully, avoiding any pin damage.
• Install a new airbag module by connecting the harness and securing it with bolts to the specified torque (usually around 7.5 Nm).

4. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any stored codes.
• Start the vehicle and verify that the airbag warning light is off and that the B0101 code does not return.