my Toyota RAV4 is showing a B1234 code what does it mean

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety while working on the airbag system.
• Wait at least 15 minutes for the system to discharge.

2. Inspect and Repair Wiring

• Tools Required: Multimeter, wire connectors, electrical tape
• Inspect the wiring harness connected to the occupant classification system for any signs of wear or damage.
• If damaged, cut the affected wires and splice in new wire of the same gauge using proper connectors.
• Secure all connections with electrical tape to prevent further issues.

3. Replace Occupant Classification Sensor

• Tools Required: Socket set, torque wrench
• Remove the passenger seat by unbolting it from the floor using a socket set.
• Disconnect the wiring harness from the occupant classification sensor beneath the seat.
• Remove the old sensor and install the new one, ensuring it is properly aligned.
• Reconnect the wiring harness and reattach the seat, tightening bolts to the manufacturer’s specified torque.

4. Reset Airbag System

• Reconnect the negative terminal on the battery.
• Use an OBD-II scanner to clear the B1234 code from the system.
• Perform a self-test of the airbag system to ensure that it is functioning correctly and that the warning light is off.