my Toyota Highlander XU70 (2020-Present) shows a B0074 code what does it mean

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, and basic hand tools.
• Disconnect the vehicle battery to prevent accidental airbag deployment during repairs.
• Allow the vehicle to sit for a minimum of 10 minutes to ensure all systems are powered down.

2. Inspect and Repair Wiring

• Sub-step 1: Remove the passenger seat from the vehicle by unscrewing the bolts securing it to the floor.
• Sub-step 2: Carefully disconnect the wiring harness from the seat and inspect for any frayed wires or poor connections.
• Sub-step 3: Repair any damaged wiring using appropriate electrical connectors and heat shrink tubing.
• Sub-step 4: Reconnect the wiring harness securely.

3. Replace Occupant Classification Sensor

• Sub-step 1: If the sensor is found to be faulty, remove the old occupant classification sensor following the manufacturer’s specified procedure.
• Sub-step 2: Install the new occupant classification sensor, ensuring it is correctly positioned and secured.
• Sub-step 3: Reconnect the wiring harness to the new sensor.

4. Reinstall Passenger Seat

• Sub-step 1: Place the passenger seat back in position and secure it with bolts, tightening them to the manufacturer’s specified torque values.
• Sub-step 2: Reconnect the battery and ensure all electrical systems are functioning.

5. Clear Codes and Test

• Sub-step 1: Use the OBD-II scanner to clear the B0074 code and any related codes.
• Sub-step 2: Start the vehicle and monitor the airbag system to ensure no warning lights are present.