B1925 – Air Bag Passenger Circuit Short To Battery

The ODBII code B1925 indicates a short circuit in the passenger airbag circuit, specifically a direct connection to the battery, which can prevent the airbag system from functioning properly.

The severity of ODBII code B1925 is high.

Common Causes For: B1924 Air Bag Internal Diagnostic Monitor Fault or System Disarm Fault

• Shorted wiring in the passenger airbag circuit
• Faulty airbag module
• Damaged connectors or terminals
• Corroded wiring
• Malfunctioning airbag sensor
• Improper installation of aftermarket components
• Faulty clock spring
• Defective passenger airbag switch

Common misdiagnosis for B1925 Air Bag Passenger Circuit Short To Battery

• Faulty airbag module
• Damaged wiring harness
• Defective seat occupancy sensor
• Malfunctioning airbag control unit
• Shorted or corroded connectors
• Faulty passenger airbag switch
• Incorrectly installed or aftermarket seats

Common Troubleshooting Steps

When dealing with an OBD-II code B1925, which indicates a “Passenger Air Bag Circuit Short to Battery,” it’s important to follow a systematic approach to troubleshoot the issue. Here are common troubleshooting steps:

• Scan Tool Verification:
• Use an OBD-II scanner to confirm the presence of the B1925 code. Check for any additional codes that may provide more context.
• Visual Inspection:
• Inspect the wiring and connectors related to the passenger airbag system. Look for signs of damage, corrosion, or loose connections.
• Check the airbag module and the passenger airbag itself for any physical damage.
• Check for Short Circuits:
• Use a multimeter to check for continuity in the airbag circuit. Look for any shorts to ground or battery voltage.
• Disconnect the battery before performing any tests to avoid accidental deployment of the airbag.
• Inspect the Airbag Module:
• Ensure that the airbag module is properly connected and that there are no issues with the module itself.
• If possible, test the airbag module with a known good unit to rule out module failure.
• Check the Passenger Airbag Connector:
• Inspect the connector for the passenger airbag. Ensure it is securely connected and free of corrosion or damage.
• If the connector is damaged, it may need to be repaired or replaced.
• Test the Airbag System:
• If you have access to a professional scan tool, perform an airbag system test to check for faults in the system.
• Follow the manufacturer’s diagnostic procedures for the airbag system.
• Check for Ground Issues:
• Ensure that the ground connections for the airbag system are secure and free of corrosion. A poor ground can cause various issues in the airbag system.
• Clear Codes and Test Drive:
• After addressing any issues found, clear the codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult Service Manual:
• Refer to the vehicle’s service manual for specific diagnostic procedures and wiring diagrams related to the airbag system.
• Professional Help:
• If the issue persists after performing these steps, consider seeking help from a professional technician or an automotive electrician who specializes in airbag systems. Always remember to follow safety precautions when working with airbag systems, as they can be dangerous if mishandled.