B1935 – OBD-II DTC

OBD-II DTC B1935 – Air Bag Passenger Inflator Circuit Resistance Low on Squib

DTC B1935 meaning

DTC B1935 refers to a diagnostic trouble code indicating a low resistance in the passenger airbag inflator circuit, specifically related to the squib. The squib is a small explosive device that ignites the airbag when a collision occurs. A low resistance reading suggests that there may be an issue with the wiring, connectors, or the inflator itself, which can prevent the airbag from deploying properly in the event of an accident.

DTC B1935 symptoms

Common symptoms associated with DTC B1935 may include:

• Illumination of the airbag warning light on the dashboard
• Possible non-deployment of the passenger airbag during a collision
• Diagnostic trouble code stored in the vehicle’s OBD-II system
• Potential issues with the passenger seat occupancy sensor

DTC B1935 causes

Several factors can lead to the occurrence of DTC B1935, including:

• Faulty passenger airbag inflator
• Damaged or corroded wiring in the airbag circuit
• Loose or poor connections at the airbag module or inflator
• Defective airbag control module
• Issues with the passenger seat occupancy sensor

DTC B1935 seriousness

DTC B1935 is considered serious because it indicates a potential failure in the airbag system. If the airbag does not deploy during a collision, it can significantly increase the risk of injury to the passenger. Therefore, it is crucial to address this issue promptly to ensure the safety of vehicle occupants.

How to diagnose DTC B1935

To diagnose DTC B1935, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC B1935.
2. Inspect the airbag inflator circuit for any visible damage, corrosion, or loose connections.
3. Check the resistance of the passenger airbag inflator circuit using a multimeter.
4. Test the airbag control module for proper operation.
5. Examine the passenger seat occupancy sensor for faults.
6. Clear the DTC and perform a road test to see if the code reappears.

How to fix DTC B1935 step-by-step instructions

To fix DTC B1935, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety while working on the airbag system.
2. Inspect and repair any damaged wiring or connectors in the airbag inflator circuit.
3. If the inflator is faulty, replace it with a new one that meets manufacturer specifications.
4. Reconnect any loose connections and ensure all components are securely fastened.
5. Reconnect the vehicle’s battery.
6. Use an OBD-II scanner to clear the DTC and reset the airbag system.
7. Perform a road test to verify that the airbag system is functioning correctly and that the DTC does not return.

How to erase DTC B1935

To erase DTC B1935, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the trouble codes section of the scanner.
4. Select the option to clear or erase the codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and turn off the ignition.
7. Start the vehicle and check if the airbag warning light remains off.

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