how to handle the B1234 code in my Toyota RAV4 XA40 (2013-2018)?

Solution

1. Preparation

• Tools Needed: OBD-II scanner, multimeter, socket set, wire brush or contact cleaner, torque wrench.
• Disconnect the negative battery terminal to prevent accidental airbag deployment during repairs.

2. Inspect and Repair Connections

• Sub-steps:
  1. Remove the passenger seat from the vehicle to access the airbag connector.
  2. Inspect the airbag connector for corrosion or damage; clean with a wire brush or contact cleaner if necessary.
  3. Ensure that the connector is firmly seated and not loose; reconnect if needed.
  4. Check the wiring harness for any damage and repair or replace as necessary.

3. Test the Occupancy Sensor

• Sub-steps:
  1. With the multimeter, measure the resistance across the occupancy sensor terminals.
  2. Refer to the service manual for the correct resistance values; replace the sensor if readings are outside specifications.
  3. Reinstall the passenger seat once repairs and tests are complete.

4. Reset Airbag System

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear any stored codes in the airbag control module.
  3. Perform a system check to ensure that the airbag warning light is off.