B1919 – Air Bag Memory Clear Circuit Short To Battery

The ODBII code B1919 indicates a short circuit in the airbag memory clear circuit to the battery, which may affect the airbag system’s ability to reset or clear stored fault codes.

The severity of ODBII code B1919 is typically considered moderate to severe.

Common Causes For: B1918 Air Bag Memory Clear Circuit Open

• Shorted wiring or connectors
• Faulty airbag control module
• Damaged or corroded connectors
• Poor ground connection
• Malfunctioning sensors
• Incorrectly installed or damaged airbag system components
• Battery voltage issues

Common misdiagnosis for B1919 Air Bag Memory Clear Circuit Short To Battery

• Faulty airbag control module
• Shorted wiring harness
• Defective airbag sensor
• Battery issues
• Poor ground connections
• Faulty seat belt pretensioner
• Malfunctioning crash sensor

Common Troubleshooting Steps

The OBD-II code B1919 indicates a problem with the airbag system, specifically related to the “Air Bag Memory Clear Circuit Short to Battery.” This code suggests that there is a short circuit in the memory clear circuit of the airbag system, which can prevent the airbag system from functioning properly. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Check for Other Codes: Use an OBD-II scanner to check for any additional trouble codes. Addressing all related codes can help in diagnosing the issue more effectively.
• Inspect Wiring and Connectors: Visually inspect the wiring and connectors related to the airbag system, especially those connected to the airbag control module. Look for signs of damage, corrosion, or loose connections.
• Pay special attention to the wiring harnesses under the seats and around the dashboard, as these areas are prone to wear and tear.
• Check the Airbag Control Module: Ensure that the airbag control module is securely mounted and that all connections are tight.
• If possible, test the airbag control module for proper operation. This may require specialized equipment or a professional technician.
• Inspect the Memory Clear Circuit: Identify the specific circuit related to the memory clear function. Check for shorts to ground or battery voltage.
• Use a multimeter to measure resistance and voltage in the circuit. Look for any abnormal readings that could indicate a short.
• Test the Airbag System Components: Check the integrity of the airbag system components, including the airbag itself, seat belt pretensioners, and any other related sensors.
• If any components are found to be faulty, they may need to be replaced.
• Clear the Codes: After performing inspections and repairs, clear the trouble codes using an OBD-II scanner.
• Test drive the vehicle to see if the code returns. If it does, further investigation may be necessary.
• Consult Technical Service Bulletins (TSBs): Check for any TSBs related to the airbag system for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes.
• Professional Diagnosis: If the issue persists after performing the above steps, consider seeking help from a professional technician or an automotive specialist who has experience with airbag systems. They may have access to advanced diagnostic tools and resources.Safety Note: – Always take precautions when working with airbag systems, as they can be dangerous if mishandled. Disconnect the vehicle’s battery and wait for a period (usually around 10-15 minutes) before working on the airbag system to ensure that the system is deactivated. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1919 code.