B1659 – Seat Driver Front Up Circuit Failure

The ODBII code B1659 indicates a malfunction in the driver front seat’s up circuit, which may involve issues with the seat adjustment motor or related wiring.

The severity of ODBII code B1659 is generally considered moderate.

Common Causes For: B1658 Seat Driver Rear Up Circuit Short To Ground

• Faulty seat position sensor
• Damaged wiring or connectors
• Short circuit in the seat circuit
• Open circuit in the seat circuit
• Malfunctioning power seat motor
• Failed body control module (BCM)
• Corrosion at electrical connections
• Blown fuse related to the seat circuit

Common misdiagnosis for B1659 Seat Driver Front Up Circuit Failure

• Faulty seat motor
• Wiring issues
• Faulty seat position sensor
• Malfunctioning body control module (BCM)
• Poor ground connection
• Faulty switch or control module
• Issues with the power supply or fuses

Common Troubleshooting Steps

The OBD-II code B1659 indicates a “Seat Driver Front Up Circuit Failure.” This code is related to the power seat system, specifically the circuit that controls the upward movement of the driver’s seat. Here are some common troubleshooting steps to diagnose and potentially resolve this issue:

• Check for Additional Codes: Use an OBD-II scanner to check for any other related trouble codes. Sometimes, multiple codes can provide more context for the issue.
• Inspect the Seat Switch:
• Remove the seat switch and inspect it for any signs of damage or wear.
• Test the switch for continuity using a multimeter. If the switch is faulty, it may need to be replaced.
• Examine the Wiring and Connectors:
• Inspect the wiring harness and connectors associated with the seat motor and switch for any signs of damage, corrosion, or loose connections.
• Look for frayed wires or broken connectors that could interrupt the circuit.
• Test the Seat Motor:
• Disconnect the seat motor and test it directly with a power source to see if it operates correctly. If the motor does not work when powered directly, it may need to be replaced.
• Check the Power and Ground:
• Use a multimeter to check for power and ground at the seat motor connector when the switch is activated. Ensure that the motor is receiving the correct voltage.
• If there is no power, trace the wiring back to the fuse box and check for blown fuses or faulty relays.
• Inspect the Fuse:
• Locate the fuse associated with the power seat circuit and check if it is blown. Replace it if necessary and see if the issue persists.
• Look for Short Circuits:
• Check for any short circuits in the wiring that could be causing the failure. This may require a visual inspection and testing with a multimeter.
• Check for Module Issues:
• In some vehicles, the power seat operation may be controlled by a body control module (BCM) or a similar module. If all other components check out, the module may need to be diagnosed or replaced.
• Consult the Vehicle Manual:
• Refer to the vehicle’s service manual for specific wiring diagrams and troubleshooting procedures related to the power seat system.
• Professional Diagnosis:
• If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who has experience with automotive electrical systems. By following these steps, you should be able to identify the cause of the B1659 code and take appropriate action to resolve the issue.