B1730 – Seat Driver Rear Down Switch Circuit Open

The ODBII code B1730 indicates a malfunction in the driver rear seat down switch circuit, specifically that the circuit is open, meaning there is a break in the electrical connection preventing the switch from functioning properly.

The severity of ODBII code B1730 is generally considered moderate.

Common Causes For: B1729 Seat Driver Rear Down Switch Circuit Failure

• Faulty driver rear down switch
• Open circuit or broken wiring
• Poor electrical connections
• Faulty seat control module
• Corroded connectors
• Blown fuse related to the seat system
• Malfunctioning power seat motor

Common misdiagnosis for B1730 Seat Driver Rear Down Switch Circuit Open

• Faulty seat switch
• Wiring issues
• Faulty seat module
• Malfunctioning power seat motor
• Issues with the body control module (BCM)
• Poor ground connections
• Incorrectly installed or damaged seat assembly

Common Troubleshooting Steps

When dealing with an OBD-II code B1730, which indicates a “Seat Driver Rear Down Switch Circuit Open,” you can follow these common troubleshooting steps:

• Check the Vehicle’s Manual: Refer to the vehicle’s service manual for specific information regarding the seat switch circuit and wiring diagrams.
• Visual Inspection:
• Inspect the wiring and connectors associated with the driver seat switch. Look for any signs of damage, corrosion, or loose connections.
• Check the seat harness for any fraying or broken wires.
• Test the Switch:
• Use a multimeter to test the seat switch for continuity. If the switch is faulty, it may need to be replaced.
• If the switch is a momentary switch, ensure it is functioning correctly when pressed.
• Check for Ground:
• Ensure that the ground connection for the seat switch circuit is intact. A poor ground can cause an open circuit.
• Inspect the Seat Module:
• If your vehicle has a seat control module, check for any faults in the module itself. This may require specialized diagnostic equipment.
• Ensure that the module is receiving power and is properly connected.
• Scan for Additional Codes:
• Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues.
• Clear the Code:
• After performing the above checks and repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult a Professional:
• If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with automotive electrical systems. By following these steps, you should be able to identify and resolve the issue related to the B1730 code.