AutoCodes – Generic – B1777

B1777 Code - Drivers Seatbelt Tension Reducer Circuit Short to Ground

Quick Answer

The Body Control Module (BCM) monitors the Drivers Seatbelt. Common causes include Faulty Drivers Seatbelt, Drivers Seatbelt harness is open or shorted, Drivers Seatbelt 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: B1777 indicates Drivers Seatbelt Tension Reducer Circuit Short to Ground.
Common causes: Common causes include Faulty Drivers Seatbelt, Drivers Seatbelt harness is open or shorted, Drivers Seatbelt 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 4,695

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 B1777 Description

The Body Control Module (BCM) monitors the Drivers Seatbelt. The BCM sets the OBDII code when the Drivers Seatbelt is not to factory specifications.

OBDII Code B1777 - Drivers Seatbelt Tension Reducer Circuit Short to Ground - AutoCodes.com — B1777 Code - Drivers Seatbelt Tension Reducer Circuit Short to Ground

What does this mean?

What are the Possible Causes of the DTC B1777?

Faulty Drivers Seatbelt
Drivers Seatbelt harness is open or shorted
Drivers Seatbelt circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1777?

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 B1777 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 B1777 code?

Need more information on how to fix the B1777 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1777 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1777 Nissan — Rear Window Defogger Output Signal

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 B1777 Code

1. What are the common symptoms of OBDII code B1777 (Driver's Seatbelt Tension Reducer Circuit Short to Ground)?

The common symptoms include the airbag warning light illuminating on the dashboard, failure of the seatbelt tension reducer system, and possible loss of seatbelt functionality.

2. What are the potential causes of OBDII code B1777?

The code B1777 is typically caused by a short circuit to ground in the driver's seatbelt tension reducer circuit, which can be due to damaged wiring, a faulty tension reducer mechanism, or a problem with the airbag control module.

3. How can I diagnose OBDII code B1777?

Diagnosing code B1777 involves using an OBDII scanner to retrieve the fault code, inspecting the seatbelt tension reducer circuit for any visible damage, and testing the components involved in the system for proper functionality.

4. Can I still drive my vehicle with OBDII code B1777 present?

It is not recommended to drive the vehicle with OBDII code B1777 present, as it indicates a fault in the seatbelt tension reducer system, which is designed to enhance safety in the event of a collision.

5. How can I repair OBDII code B1777?

Repairing code B1777 involves locating and repairing the short circuit to ground in the driver's seatbelt tension reducer circuit, replacing any damaged wiring or components, and clearing the fault code with an OBDII scanner.

6. Is it safe to reset the OBDII code B1777 without fixing the underlying issue?

Resetting the fault code without addressing the underlying issue can temporarily turn off the warning light but will not resolve the safety concern related to the seatbelt tension reducer system malfunction.

7. Can a DIY enthusiast fix OBDII code B1777 at home?

While diagnosing and repairing code B1777 may be possible for some DIY enthusiasts with the right tools and knowledge, it is recommended to seek professional help to ensure the safety systems in the vehicle are properly repaired.

8. What is the purpose of the driver's seatbelt tension reducer circuit?

The driver's seatbelt tension reducer circuit is designed to automatically tighten the seatbelt during a collision to help restrain the driver and reduce the risk of injury.

9. Are there any recalls related to OBDII code B1777?

Recalls related to code B1777 may vary depending on the vehicle make and model, so it is advisable to check with the manufacturer or a trusted automotive service center for any relevant recall information.

10. How can I prevent OBDII code B1777 from occurring in the future?

Regular maintenance, including inspecting the seatbelt tension reducer system during scheduled service intervals, can help prevent the occurrence of code B1777 by identifying and addressing potential issues early.