why is my Toyota Corolla E170 (2013-2019) showing a B0101 error code

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the vehicle's battery and wait at least 10 minutes to ensure airbag system discharges.
• Tools required: OBD-II scanner, multimeter, socket set.

2. Inspect and Repair Connections

• Sub-steps:
  1. Remove the steering wheel cover and airbag assembly using the appropriate socket and tools.
  2. Carefully disconnect the airbag harness connector, inspecting for bent pins or corrosion.
  3. Clean the connector with electrical contact cleaner and reconnect.
  4. If necessary, replace the connector with a new one if damage is found.

3. Replace Faulty Components

• Sub-steps:
  1. If testing reveals a faulty driver's airbag module, remove it by unscrewing the retaining bolts.
  2. Disconnect the module from the harness and replace it with a new module that meets OEM specifications.
  3. Reinstall the module and secure it with the bolts to the required torque (typically around 7-9 Nm).

4. Reassemble and Test

• Sub-steps:
  1. Reattach the airbag assembly and steering wheel cover, ensuring all clips are secured.
  2. Reconnect the vehicle's battery.
  3. Use the OBD-II scanner to clear error codes and check for the B0101 code or any new codes.