B1651 – OBD-II DTC

OBD-II DTC B1651 – Seat Driver Recline Backward Circuit Failure

DTC B1651 meaning

DTC B1651 refers to a diagnostic trouble code indicating a failure in the seat driver recline backward circuit. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components and systems for faults. The specific issue relates to the electrical circuit responsible for controlling the backward recline function of the driver’s seat.

DTC B1651 symptoms

Common symptoms associated with DTC B1651 may include:

• The driver’s seat recline function not working when attempting to adjust it backward.
• Intermittent or complete failure of the seat adjustment controls.
• Warning lights or messages on the dashboard related to seat adjustments.
• Other seat functions may still operate normally, indicating a localized issue.

DTC B1651 causes

Several potential causes for DTC B1651 include:

• Faulty seat recline motor or actuator.
• Damaged or frayed wiring in the seat adjustment circuit.
• Corroded or loose electrical connectors.
• Malfunctioning seat control switch.
• Issues with the vehicle’s body control module (BCM) or other related control modules.

DTC B1651 seriousness

The seriousness of DTC B1651 can vary. While it may not affect the vehicle’s overall drivability, it can impact driver comfort and safety. A non-functioning seat recline may lead to improper seating position, which can affect visibility and control of the vehicle. It is advisable to address this issue promptly to ensure optimal driving conditions.

How to diagnose DTC B1651

To diagnose DTC B1651, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1651 code.
2. Inspect the seat adjustment switch for any visible damage or wear.
3. Check the wiring and connectors in the seat recline circuit for signs of damage or corrosion.
4. Test the seat recline motor for functionality using a multimeter.
5. Examine the body control module for any fault codes or issues that may affect the seat adjustment system.

How to fix DTC B1651 step-by-step instructions

To fix DTC B1651, follow these step-by-step instructions:

1. Clear the DTC using an OBD-II scanner and test the seat recline function.
2. If the code returns, inspect the seat adjustment switch and replace it if faulty.
3. Repair or replace any damaged wiring or connectors in the seat recline circuit.
4. Test and replace the seat recline motor if it is not functioning properly.
5. Recheck the body control module for any updates or reprogramming needs.
6. After repairs, clear the DTC again and perform a final test of the seat recline function.

How to erase DTC B1651

To erase DTC B1651, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the vehicle’s ignition without starting the engine.
3. Navigate to the DTC menu on the scanner and select the option to clear or erase codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the code does not return.

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