how to fix B1234 code in Toyota RAV4 XA50 (2019-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to prevent accidental airbag deployment.
• Wait at least 10 minutes after disconnecting the battery before proceeding.

2. Inspect and Repair Wiring

• Tools Required: Wire cutter/stripper, soldering iron, multimeter
• Inspect the wiring harness for any damage. Repair any damaged wires by cutting out the damaged section and splicing in new wire.
• Use a multimeter to check continuity in the repaired wires to ensure proper connection.

3. Replace Faulty Airbag Sensor

• Tools Required: Socket set, torque wrench
• Locate the specific airbag sensor that triggered the B1234 code (refer to the service manual for the exact location).
• Remove the fasteners securing the sensor using the socket set.
• Disconnect the electrical connector from the sensor.
• Install the new airbag sensor by reversing the removal steps, ensuring it is torqued to the manufacturer’s specifications.

4. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any stored codes in the ECU and reset the airbag system.

5. Final Checks

• Conduct a visual inspection to ensure all connectors are properly secured.
• Start the vehicle and check that the airbag warning light is no longer illuminated.