B1924 – Air Bag Internal Diagnostic Monitor Fault or System Disarm Fault

The ODBII code B1924 indicates a fault in the airbag system’s internal diagnostic monitor or a system disarm condition, suggesting a potential issue with the airbag control module or its ability to perform self-diagnostics.

The severity of ODBII code B1924 is typically considered high.

Common Causes For: B1923 Air Bag Memory Clear Circuit Short To Ground

• Faulty airbag control module
• Poor electrical connections or wiring issues
• Corroded connectors
• Malfunctioning sensors
• Low battery voltage
• Faulty seat belt pretensioners
• Issues with the airbag deployment circuit
• Software glitches in the airbag system
• Impact or collision damage
• Faulty diagnostic monitor

Common misdiagnosis for B1924 Air Bag Internal Diagnostic Monitor Fault or System Disarm Fault

• Faulty airbag module
• Wiring issues or shorts
• Faulty seat belt pretensioner
• Malfunctioning crash sensor
• Battery or power supply issues
• Faulty connectors or terminals
• Software or calibration errors
• Faulty impact sensor
• Grounding issues
• Faulty airbag indicator light

Common Troubleshooting Steps

When dealing with OBD-II code B1924, which indicates an “Air Bag Internal Diagnostic Monitor Fault” or “System Disarm Fault,” it’s important to follow a systematic approach to troubleshoot the issue. Here are common troubleshooting steps:

• 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 Airbag System:
• **Wiring and Connectors: Inspect the wiring and connectors related to the airbag system for any signs of damage, corrosion, or loose connections. Pay special attention to the connectors under the seats and at the airbag module.
• **Airbag Module: Ensure that the airbag control module is securely mounted and that there are no signs of physical damage.
• Battery Voltage: Ensure that the vehicle’s battery is fully charged and that the voltage is within the acceptable range (typically 12.4 to 12.6 volts). Low voltage can cause faults in the airbag system.
• Check for Faulty Components:
• **Airbags: Inspect the airbag units themselves for any signs of damage or deployment.
• **Crash Sensors: Check the crash sensors for proper operation and secure mounting.
• Clear Codes and Test Drive: After performing visual inspections and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Check for Recalls or Service Bulletins: Research if there are any recalls or Technical Service Bulletins (TSBs) related to the airbag system for your specific vehicle make and model.
• Professional Diagnosis: If the code persists after performing the above steps, it may be necessary to consult a professional mechanic or dealership. They may have specialized diagnostic tools and knowledge to further investigate the issue.
• Replace Faulty Components: If a specific faulty component is identified (e.g., airbag module, wiring harness, etc.), replace it according to manufacturer specifications.
• Recheck System: After repairs, recheck the airbag system to ensure that all components are functioning correctly and that no new codes have appeared. Always remember to take proper safety precautions when working with airbag systems, as they can be dangerous if mishandled. If you’re unsure about any step, it’s best to consult a professional.