B1668 Mirror Driver Right/Left Motor Stalled

The B1668 trouble code signifies a fault within the power mirror system of a vehicle, specifically indicating a stalled motor responsible for the right or left movement of the driver's side mirror. Understanding the causes, symptoms, and potential solutions for this code is crucial for maintaining proper mirror functionality and ensuring safe driving.

Understanding the B1668 Code

The B1668 code refers to a malfunction detected in the driver's side mirror adjustment system. This system relies on small electric motors to move the mirror glass horizontally (left/right) and vertically (up/down) in response to driver input. When the vehicle's computer (ECU or BCM) detects that the motor responsible for the right/left movement is stalled, meaning it's not moving or drawing excessive current, it triggers the B1668 code.

Detailed Explanations

Fault Code B1668: This code is specifically assigned to indicate a problem with the driver's side mirror's horizontal (left/right) adjustment motor. It's a diagnostic tool used by technicians to pinpoint the area of the problem within the vehicle's electrical system.

Description: Mirror Driver Right/Left Motor Stalled: This clearly states that the motor responsible for moving the driver's side mirror horizontally is not functioning correctly. "Stalled" suggests the motor is either unable to move or is drawing excessive current while attempting to do so.

Symptoms: The most obvious symptom is the inability to adjust the driver's side mirror horizontally. You might also notice intermittent operation, where the mirror works sometimes but not others. The presence of the B1668 DTC (Diagnostic Trouble Code) during a scan is another key indicator.

Possible Causes: Several factors can lead to a B1668 code:

• Stalled Motor: This is often the root cause. The motor itself might be physically stuck due to corrosion, debris, or internal failure.
• Wiring Issues: Damaged, corroded, or shorted wiring between the mirror switch, the motor, and the control module can prevent proper electrical signals from reaching the motor.
• Connector Problems: Loose or corroded connectors can disrupt the flow of electricity, leading to a stalled motor.
• Faulty Mirror Switch: A malfunctioning mirror switch might not send the correct signals to the motor, preventing it from operating.
• Faulty Control Module: The Body Control Module (BCM) or a dedicated mirror control module is responsible for processing signals from the mirror switch and controlling the motor. An internal failure in the module can cause the B1668 code.
• Obstruction: Physical obstructions such as ice, dirt, or debris can prevent the mirror from moving freely, causing the motor to stall.

Diagnostic Steps: A systematic approach is necessary to diagnose the B1668 code:

1. Scan for DTCs: Use a scan tool to confirm the presence of the B1668 code and check for any other related codes.
2. Visually Inspect Wiring and Connectors: Carefully examine the wiring and connectors associated with the mirror motor, looking for any signs of damage, corrosion, or loose connections.
3. Test Mirror Switch Functionality: Use a multimeter to check if the mirror switch is sending the correct signals when activated.
4. Test Mirror Motor Resistance and Operation: Use a multimeter to measure the resistance of the motor. An unusually high or low resistance reading can indicate a problem. Also, attempt to directly power the motor to see if it operates. Caution: applying incorrect voltage could further damage the motor or other components.
5. Check for Physical Obstructions: Inspect the mirror assembly for any obstructions that might be preventing the mirror from moving.
6. Check for Proper Voltage and Ground to the Mirror Motor: Use a multimeter to verify that the motor is receiving the correct voltage and has a good ground connection.
7. Test the BCM or Mirror Control Module Output: This step requires specialized equipment and knowledge. It involves testing the output signals from the BCM or mirror control module to see if they are functioning correctly.

Repair Options: The appropriate repair will depend on the underlying cause of the B1668 code:

• Replace Mirror Motor or Entire Mirror Assembly: If the motor is stalled, replacing it is the most common solution. In some cases, it might be more cost-effective to replace the entire mirror assembly.
• Repair or Replace Damaged Wiring: If the wiring is damaged, it needs to be repaired or replaced.
• Clean or Replace Corroded Connectors: Clean corroded connectors with a wire brush or electrical contact cleaner. If the corrosion is severe, the connectors might need to be replaced.
• Replace Faulty Mirror Switch: If the mirror switch is defective, it needs to be replaced.
• Replace Faulty BCM or Mirror Control Module: If the BCM or mirror control module is faulty, it needs to be replaced.
• Remove Any Obstructions: Remove any obstructions that are preventing the mirror from moving.
• Reprogramming of BCM: Replacing the BCM might require reprogramming, depending on the vehicle's make and model. Consult a qualified technician for this procedure.

Related Codes: The B1668 code might be accompanied by other codes related to the power mirror system, such as B1667 (Mirror Driver Up/Down Motor Stalled). These related codes can provide additional clues about the nature of the problem.

Severity: The B1668 code is considered to be of medium severity. While it doesn't directly affect the vehicle's ability to run, it can impair visibility and reduce safety, especially when changing lanes or parking.

Cost to Repair: The cost to repair the B1668 code can vary widely depending on the failed component and the labor rates of the repair shop. A simple connector repair might cost as little as $50, while replacing the entire mirror assembly can cost $500 or more.

Frequently Asked Questions

What does the B1668 code mean? It indicates a problem with the driver's side mirror's horizontal (left/right) adjustment motor, specifically that the motor is stalled.

Can I still drive my car with the B1668 code? Yes, but it's not recommended. Impaired mirror functionality reduces visibility, which can compromise driving safety.

What are the most common causes of the B1668 code? A stalled mirror motor, damaged wiring, or corroded connectors are the most frequent culprits.

How can I diagnose the B1668 code myself? Start by visually inspecting the wiring and connectors, then test the mirror switch and motor with a multimeter. More advanced diagnostics may require specialized tools.

Will replacing the mirror fix the B1668 code? Replacing the entire mirror assembly will likely resolve the issue if the problem lies within the motor itself, but it's essential to diagnose the root cause first. Wiring or control module issues will still need to be addressed.

Conclusion

The B1668 code signals a malfunction in the driver's side mirror's horizontal adjustment system. A thorough diagnosis is crucial to pinpoint the underlying cause, whether it's a stalled motor, wiring problem, or a faulty control module. Addressing this issue promptly is essential for maintaining optimal visibility and ensuring safe driving conditions.