AutoCodes – Generic – B1779

B1779 Code - Mirror Driver Down Circuit Open

Quick Answer

The Body Control Module (BCM) monitors the Mirror Driver Down Motor. Common causes include Faulty Mirror Driver Down Motor, Mirror Driver Down Motor harness is open or shorted, Mirror Driver Down Motor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1779 indicates Mirror Driver Down Circuit Open.
Common causes: Common causes include Faulty Mirror Driver Down Motor, Mirror Driver Down Motor harness is open or shorted, Mirror Driver Down Motor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 4,639

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 26, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1779 Description

The Body Control Module (BCM) monitors the Mirror Driver Down Motor. The BCM sets the OBDII code when the Mirror Driver Down Motor is not to factory specifications.

OBDII Code B1779 - Mirror Driver Down Circuit Open - AutoCodes.com — B1779 Code - Mirror Driver Down Circuit Open

What does this mean?

What are the Possible Causes of the DTC B1779?

Faulty Mirror Driver Down Motor
Mirror Driver Down Motor harness is open or shorted
Mirror Driver Down Motor circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1779?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1779 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1779 code?

Need more information on how to fix the B1779 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1779 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1779 Nissan — Hydraulic Pump Temperature Sensor

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1779 Code

1. What are the common symptoms of OBDII code B1779 (Mirror Driver Down Circuit Open)?

- The common symptoms include non-functioning or erratic movement of the driver-side mirror.

2. What can cause the Mirror Driver Down Circuit Open code (B1779) to appear?

- Possible causes include a damaged mirror motor, faulty mirror switch, wiring issues, or a blown fuse.

3. How can I diagnose the Mirror Driver Down Circuit Open code (B1779) in my vehicle?

- You can start by checking the fuse related to the mirror circuit, inspecting the mirror switch, and testing the wiring and mirror motor for continuity.

4. Is it safe to continue driving with the Mirror Driver Down Circuit Open issue (B1779) unresolved?

- While it may not affect the drivability of the vehicle, it is recommended to address the issue promptly to ensure proper functionality of the driver-side mirror.

5. Can I repair the Mirror Driver Down Circuit Open problem (B1779) myself?

- Depending on your automotive repair skills, you may be able to fix the issue by replacing the mirror motor, repairing wiring, or troubleshooting the mirror switch.

6. How much does it typically cost to repair the Mirror Driver Down Circuit Open code (B1779) at a professional auto repair shop?

- Costs can vary based on the extent of the issue and the labor rates of the repair shop, but expect to budget for parts and labor for a mirror motor replacement or wiring repair.

7. Will resetting the OBDII code B1779 make the issue go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not resolved, the code is likely to reappear after some time.

8. Are there any preventive maintenance tips to avoid encountering the Mirror Driver Down Circuit Open code (B1779)?

- Regularly inspecting the functionality of your vehicle's mirrors, addressing any issues promptly, and avoiding excessive force when adjusting the mirrors can help prevent this code from appearing.

9. Can extreme weather conditions contribute to the Mirror Driver Down Circuit Open problem (B1779)?

- Yes, extreme heat or cold can sometimes cause electrical components in the mirror system to malfunction, leading to the B1779 trouble code.

10. How long does it typically take to repair the Mirror Driver Down Circuit Open issue (B1779)?

- The repair duration can vary based on the exact cause of the problem and the complexity of accessing and replacing the faulty components, but it may range from 1 to 3 hours at a repair shop.