B1665 – Seat Driver Forward/Backward Motor Stalled

The ODBII code B1665 indicates that the driver’s seat forward/backward motor has stalled, meaning it is unable to move the seat in the intended direction due to a malfunction or obstruction.

The severity of ODBII code B1665 is moderate.

Common Causes For: B1664 Seat Driver Rear Up/Down Motor Stalled

• Faulty seat motor
• Wiring issues (shorts or open circuits)
• Bad connections or corroded terminals
• Obstruction in the seat mechanism
• Failed seat switch
• Faulty power supply to the motor
• Malfunctioning control module

Common misdiagnosis for B1665 Seat Driver Forward/Backward Motor Stalled

• Faulty seat motor
• Wiring issues
• Bad seat switch
• Faulty body control module (BCM)
• Poor ground connection
• Software glitches in the vehicle’s computer system
• Incorrectly installed or damaged seat components

Common Troubleshooting Steps

When dealing with an OBD-II code B1665, which indicates that the driver’s seat forward/backward motor is stalled, there are several common troubleshooting steps you can take to diagnose and potentially resolve the issue. Here’s a systematic approach:

• 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 Motor and Mechanism: **Visual Inspection: Check the seat motor and its wiring for any visible damage, corrosion, or loose connections.
• **Motor Functionality: Manually try to move the seat to see if it is physically stuck or if there is any obstruction preventing movement.
• Test the Seat Motor: **Direct Power Test: Disconnect the motor and apply direct power to it to see if it operates. If it does not work, the motor may be faulty and needs replacement.
• **Resistance Check: Use a multimeter to check the resistance of the motor. If the resistance is outside the manufacturer’s specifications, the motor may be defective.
• Inspect Wiring and Connectors: **Wiring Inspection: Check the wiring harness for any frayed wires, shorts, or breaks that could affect the motor’s operation.
• **Connector Check: Ensure that all connectors are clean, secure, and free of corrosion.
• Check the Seat Switch: **Functionality Test: Test the seat switch to ensure it is functioning properly. A faulty switch can prevent the motor from receiving power.
• **Continuity Test: Use a multimeter to check for continuity in the switch when pressed.
• Examine the Power Supply: **Fuses: Check the fuse related to the seat motor circuit. If blown, replace it and see if the issue persists.
• **Voltage Check: Use a multimeter to check for voltage at the motor connector when the switch is activated. If there is no voltage, trace back to the power source.
• Check for Obstructions: Ensure that there are no objects or debris obstructing the seat’s movement. Sometimes, foreign objects can jam the mechanism.
• Reset the System: After performing checks and repairs, clear the code using the OBD-II scanner and see if it returns after testing the seat movement.
• Consult the Service Manual: Refer to the vehicle’s service manual for specific troubleshooting steps, wiring diagrams, and specifications related to the seat motor and its components.
• Professional Help: If the issue persists after performing these steps, consider seeking help from a professional mechanic or an automotive technician who can perform more advanced diagnostics. By following these steps, you should be able to identify the cause of the B1665 code and take appropriate action to resolve the issue.