B1673 – OBD-II DTC

OBD-II DTC B1673 – Seat Driver Occupied Input Circuit Open

DTC B1673 meaning

DTC B1673 refers to a diagnostic trouble code indicating an issue with the seat driver occupied input circuit. Specifically, it signifies that the circuit is open, meaning there is a break in the electrical connection that prevents the system from detecting whether the driver’s seat is occupied. This code is often associated with the airbag system and seat occupancy sensors.

DTC B1673 symptoms

Common symptoms associated with DTC B1673 may include:

• Airbag warning light illuminated on the dashboard
• Inconsistent or non-functional seat occupancy detection
• Potential issues with airbag deployment in the event of a collision
• Other related warning lights may also be triggered

DTC B1673 causes

Several factors can lead to the occurrence of DTC B1673, including:

• Faulty seat occupancy sensor
• Damaged or frayed wiring in the seat occupancy circuit
• Loose or corroded connectors
• Issues with the airbag control module
• Faulty seat belt buckle switch

DTC B1673 seriousness

DTC B1673 is considered serious because it can affect the functionality of the airbag system. If the system cannot determine whether the driver’s seat is occupied, it may not deploy the airbag in the event of a crash, increasing the risk of injury. It is important to address this issue promptly to ensure passenger safety.

How to diagnose DTC B1673

To diagnose DTC B1673, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1673 code.
2. Inspect the seat occupancy sensor and its wiring for visible damage.
3. Check all connectors related to the seat occupancy circuit for corrosion or looseness.
4. Test the seat occupancy sensor with a multimeter to ensure it is functioning correctly.
5. Examine the airbag control module for any additional codes or issues.

How to fix DTC B1673 step-by-step instructions

To fix DTC B1673, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety while working on the electrical system.
2. Inspect and repair any damaged wiring or connectors in the seat occupancy circuit.
3. If the seat occupancy sensor is faulty, replace it with a new one.
4. Reconnect all connectors securely and ensure there is no corrosion.
5. Reconnect the vehicle’s battery.
6. Clear the DTC using an OBD-II scanner and test drive the vehicle to see if the code returns.

How to erase DTC B1673

To erase DTC B1673, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the option to clear or erase trouble codes on the scanner.
4. Select the option to erase the DTCs.
5. Disconnect the scanner and turn off the ignition.
6. Start the vehicle and monitor for any reoccurrence of the code.

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