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Engine-Codes – Generic – B1924

B1924 Code - Air Bag Internal Diagnostic Monitor Fault or System Disarm Fault

Quick Answer

The B1924 diagnostic trouble code indicates an internal fault within the airbag diagnostic monitor system or a disarm fault in the airbag system. Common causes include Faulty wiring or connectors in the airbag system, Malfunctioning airbag diagnostic monitor, Blown fuse in the airbag system circuit. 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
B1924 indicates Air Bag Internal Diagnostic Monitor Fault or System Disarm Fault.
Common causes
Common causes include Faulty wiring or connectors in the airbag system, Malfunctioning airbag diagnostic monitor, Blown fuse in the airbag system circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code B1924 Description

The B1924 diagnostic trouble code indicates an internal fault within the airbag diagnostic monitor system or a disarm fault in the airbag system. The airbag system is a critical safety feature in modern vehicles, designed to deploy in the event of a collision to protect occupants from serious injury. When this code is triggered, it means that there is a malfunction within the system that could prevent the airbags from deploying properly in the event of an accident.

OBDII Code B1924 - Air Bag Internal Diagnostic Monitor Fault or System Disarm Fault
B1924 Code - Air Bag Internal Diagnostic Monitor Fault or System Disarm Fault

Common Causes of B1924

  1. Faulty wiring or connectors in the airbag system.
  2. Malfunctioning airbag diagnostic monitor.
  3. Blown fuse in the airbag system circuit.
  4. Faulty clockspring in the steering column.
  5. Issue with the airbag control module.

Symptoms of B1924

  1. Airbag warning light illuminated on the dashboard.
  2. Audible warning chime indicating an airbag system fault.
  3. Inability to reset the airbag warning light.
  4. Diagnostic trouble code B1924 stored in the vehicle's computer.
  5. Airbag system failing self-test during vehicle startup.

How to Fix B1924

  1. Begin by conducting a thorough inspection of the airbag system wiring and connectors to check for any visible damage or corrosion. Repair or replace any faulty components.
  2. Test the airbag diagnostic monitor using a compatible scan tool to check for proper functionality. Replace the monitor if necessary.
  3. Check and replace any blown fuses in the airbag system circuit.
  4. Inspect the clockspring in the steering column for any damage or wear. Replace if needed.
  5. If the issue persists, further diagnostics may be required to pinpoint the exact cause, such as testing the airbag control module for faults.

Cost to Fix B1924

The cost of repairing a B1924 airbag internal diagnostic monitor fault or system disarm fault can vary depending on the specific cause of the issue and the make and model of the vehicle. On average, the repair costs for this type of issue can range from $200 to $800, including parts and labor. However, it is essential to note that labor rates at auto repair shops can vary significantly, with hourly rates typically ranging from $80 to $150. It is advisable to check with local repair shops for a more accurate estimate based on your location and vehicle.

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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B1924 Code

1. What does OBDII code B1924 mean?

B1924 indicates an issue with the airbag system, specifically an internal diagnostic monitor fault or system disarm fault within the airbag control module.

2. What are the common symptoms of code B1924?

Typical symptoms include the airbag warning light staying on, the airbag system being disabled, and a possible lack of deployment during a collision.

3. What causes code B1924 to appear?

This code can be triggered by a faulty airbag control module, damaged wiring or connectors, a discharged backup power supply, or software corruption in the module.

4. Is it safe to drive with code B1924 active?

No, driving with this code active is not safe, as it indicates the airbag system may not function properly in the event of an accident.

5. How can code B1924 be diagnosed?

A technician will use a scan tool to read the code, inspect the airbag control module, check for damaged wiring or connectors, and test the backup power supply.

6. Can resetting the airbag control module clear code B1924?

Resetting the module may temporarily clear the code, but the underlying issue must be resolved to prevent the code from returning.

7. What repairs are typically needed for code B1924?

Repairs may include replacing the airbag control module, repairing or replacing damaged wiring or connectors, or addressing software issues within the module.

8. How much does it cost to fix code B1924?

Repair costs can vary widely but typically range from $300 to $1,000, depending on whether the airbag control module needs replacement or wiring repairs are required.

9. Can a blown fuse cause code B1924?

Yes, a blown fuse in the airbag system circuit can cause this code by cutting power to the airbag control module.

10. Do I need a professional to fix code B1924?

Yes, due to the complexity and safety-critical nature of the airbag system, it’s recommended to have a professional handle the diagnosis and repair.

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