how to fix B0101 code in Toyota Corolla E140 (2006-2013)

Solution

1. Preparation

• Gather tools and materials needed: OBD-II scanner, multimeter, socket set, and replacement parts if necessary.
• Disconnect the vehicle battery and wait for at least 10 minutes to ensure the airbag system is safe to work on.

2. Inspect and Repair Wiring

• Sub-steps:
  1. Remove the passenger seat to access the wiring harness underneath.
  2. Inspect the airbag connector and wiring for any frays, breaks, or corrosion.
  3. If damage is found, repair the wiring using appropriate electrical connectors and heat shrink tubing.
  4. Ensure all connections are firm and protected from moisture.

3. Replace the Weight Sensor (if necessary)

• Sub-steps:
  1. Locate the weight sensor under the passenger seat.
  2. Disconnect the sensor connector and remove the mounting bolts.
  3. Install the new weight sensor by reversing the removal steps and ensuring it is securely mounted.
  4. Reconnect the sensor's electrical connector.

4. Reassemble and Test

• Sub-steps:
  1. Reinstall the passenger seat and secure it with the appropriate bolts.
  2. Reconnect the vehicle battery.
  3. Use the OBD-II scanner to check for any remaining codes.
  4. Perform a visual inspection to ensure all components are in place.