The OBD-II trouble code B1655 – Seat Driver Rear Up Circuit Failure – is a specific diagnostic code related to the electrical system controlling the driver’s rear seat adjustment mechanism. When this code appears, it indicates that there is a malfunction or interruption in the circuit responsible for moving the driver’s rear seat upward, which can affect comfort and proper seat positioning. This issue is typically linked to the vehicle’s seat control module and wiring harness. If you’ve encountered this code or are experiencing problems with your driver’s rear seat adjustments, keep scrolling! In this article, you’ll find practical guidance on how to identify the symptoms, understand the possible causes, and explore effective solutions to get your seat functioning smoothly again.

What symptoms might indicate the B1655 error?

When this issue occurs, drivers may notice specific symptoms related to the rear seat adjustment. These signs can affect comfort and indicate a problem with the seat mechanism.

  • 1. Seat adjustment failure: The rear seat on the driver’s side does not move up or down when controls are used
  • 2. Unusual noises: Clicking or grinding sounds coming from the rear seat area during adjustment attempts
  • 3. Seat position stuck: The seat remains in one position and does not respond to control inputs
  • 4. Warning light activation: Dashboard warning indicator related to the seat system may illuminate
  • 5. Intermittent functionality: Seat adjustment works sporadically or only after repeated attempts

      • Common reasons that can lead to error code B1655

      This error code often indicates an issue within the electrical system of the seat. Identifying the root cause can help in efficiently resolving the malfunction.

      • 1. Wiring Harness Damage: Broken or frayed wires causing interrupted electrical flow to the seat motor.
      • 2. Faulty Seat Motor: The motor responsible for moving the seat fails due to wear or internal damage.
      • 3. Poor Electrical Connection: Loose or corroded connectors leading to intermittent or no power supply.
      • 4. Blown Fuse: A fuse protecting the seat circuit may be blown, cutting off power entirely.
      • 5. Defective Seat Control Module: Malfunctioning control unit that cannot properly regulate seat movement commands.

      B1655 at-home error code check step by step

      Diagnosing the B1655 – Seat Driver Rear Up Circuit Failure at home is entirely feasible with some basic tools and careful observation. By following these straightforward steps, you can determine whether this circuit is faulty without needing professional equipment.

      First, connect an OBD-II scanner to your vehicle’s diagnostic port, usually located under the dashboard near the steering column. Use the scanner to access live data and perform an active test on the seat driver rear up function, observing whether the command results in any response or error signals. Next, visually inspect the wiring and connectors related to the seat driver rear up motor for any signs of damage, corrosion, or loose connections. Using a multimeter, check for continuity in the circuit wiring and verify that power and ground are present at the motor connector when activating the seat adjustment. If the circuit shows no continuity or lacks proper voltage during activation despite a clean connection, it indicates a fault in either the wiring harness or the seat motor itself.

      B1655 error repair at home: What can you do yourself and when do you need a mechanic?

      This issue often relates to electrical connectivity or mechanical components within the seat system. Performing some basic checks at home can help identify or resolve common causes before seeking professional assistance.

      • 1. Check and Clean Connectors: Inspect the wiring connectors under the seat for dirt, corrosion, or loose connections and clean or secure them as needed.
      • 2. Reset the Seat Control Module: Disconnect the car battery for 10-15 minutes to reset the control module, then reconnect and test if the problem persists.
      • 3. Inspect Seat Wiring Harness: Visually examine the wiring harness along the seat frame for any signs of damage, pinching, or wear and repair minor issues with electrical tape or replacement wires.
      • 4. Lubricate Seat Mechanism: Apply appropriate lubricant to moving parts of the seat mechanism to ensure smooth operation and reduce electrical strain caused by mechanical resistance.

      If these steps do not resolve the problem, or if you encounter complex wiring faults or internal motor failures, it is advisable to consult a professional service center for accurate diagnosis and repair.

      Consequences of error B1655 if you don’t fix it in time

      A failure in the rear seat adjustment system can lead to several long-term issues if left unaddressed. These consequences affect comfort, safety, and vehicle value.

      • 1. Reduced Passenger Comfort: Inability to properly adjust the rear seat can cause discomfort during travel, especially on long journeys.
      • 2. Increased Wear and Tear: Continuous malfunction may lead to mechanical strain on seat components, accelerating deterioration.
      • 3. Safety Hazards: Faulty seat adjustment can compromise proper seating position, affecting passenger safety in case of sudden stops or accidents.
      • 4. Electrical System Damage: Ignoring the issue might cause further electrical faults, potentially impacting other connected systems within the vehicle.
      • 5. Decreased Resale Value: Unresolved mechanical or electrical problems reduce the overall value and appeal of the vehicle on the resale market.