B1705 – Seat Driver Recline Rearward Switch Circuit Failure

The ODBII code B1705 indicates a malfunction in the driver seat recline rearward switch circuit, suggesting a failure in the electrical system or the switch itself that controls the rearward reclining function of the driver’s seat.

The severity of ODBII code B1705 is generally considered moderate.

Common Causes For: B1704 Seat Driver Recline Forward Switch Circuit Short To Ground

• Faulty driver recline switch
• Damaged wiring or connectors
• Short circuit in the circuit
• Open circuit in the circuit
• Faulty seat control module
• Corrosion in connectors
• Poor ground connection

Common misdiagnosis for B1705 Seat Driver Recline Rearward Switch Circuit Failure

• Faulty seat switch
• Wiring issues or shorts
• Faulty seat control module
• Malfunctioning power seat motor
• Issues with the vehicle’s body control module (BCM)
• Problems with the vehicle’s electrical system or battery
• Incorrectly diagnosed as a problem with the seat track or frame

Common Troubleshooting Steps

The OBD-II code B1705 indicates a problem with the driver seat recline rearward switch circuit. This code is specific to the seat control system and can be triggered by various issues. Here are some common troubleshooting steps to diagnose and potentially resolve the issue:

• Check for Additional Codes: Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are multiple issues.
• Inspect the Seat Switch: **Visual Inspection: Check the driver seat recline switch for any visible damage, wear, or corrosion.
• **Functionality Test: Test the switch to ensure it is functioning properly. You can do this by using a multimeter to check for continuity when the switch is activated.
• Examine Wiring and Connectors: **Wiring Inspection: Inspect the wiring harness connected to the seat switch for any signs of damage, fraying, or short circuits.
• **Connector Check: Ensure that all connectors are securely attached and free of corrosion or dirt.
• Test the Seat Motor: If the switch appears to be functioning correctly, test the seat recline motor. You can do this by applying direct power to the motor to see if it operates.
• If the motor does not work when powered directly, it may need to be replaced.
• Check for Ground Issues: Ensure that the ground connections for the seat control system are secure and free of corrosion. A poor ground can cause circuit failures.
• Inspect the Body Control Module (BCM): The BCM may be responsible for controlling the seat functions. Check for any faults or issues with the BCM that could be affecting the seat recline switch circuit.
• Look for Short Circuits: Use a multimeter to check for short circuits in the wiring. A short can cause the circuit to fail and trigger the B1705 code.
• Clear the Code and Test Drive: After performing the above checks and repairs, clear the trouble code using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult Repair Manual: If the issue persists, consult the vehicle’s repair manual for specific diagnostic procedures related to the seat control system.
• Seek Professional Help: If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic or technician who has experience with automotive electrical systems. By following these troubleshooting steps, you should be able to identify and potentially resolve the issue related to the B1705 code.