what does error code B1242 mean for Toyota Tacoma N300 (2016-Present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery (negative terminal) to ensure safety while working on the airbag system.

2. Inspect Wiring and Connectors

• Tools Required: Multimeter, socket set
• Visually inspect the wiring harness leading to the passenger seat occupancy sensor for fraying or disconnections.
• Disconnect the connector from the occupancy sensor and clean it with electrical contact cleaner.
• Reconnect the connector securely.

3. Replace the Occupant Classification Sensor

• Tools Required: Socket set, torque wrench
• Remove the passenger seat from the vehicle by unbolting it from the floor using the socket set.
• Disconnect the wiring harness from the seat and remove the seat from the cabin.
• Access the occupancy sensor located in the seat cushion or under the seat cover.
• Replace the sensor with a new OEM part to ensure compatibility.
• Reinstall the seat by connecting the wiring harness and bolting it back into place, tightening bolts to the manufacturer’s specified torque.

4. Reconnect Battery and Test System

• Reconnect the negative battery terminal.
• Clear the B1242 error code using an OBD-II scanner.
• Start the vehicle and monitor the airbag warning light for proper operation.
• Check that the passenger airbag indicator shows the correct status when the seat is occupied.