B1790 Code - Center Airbag Sensor Assembly Communication Circuit Malfunction
Quick Answer
The B1790 diagnostic trouble code (DTC) indicates a Center Airbag Sensor Assembly Communication Circuit Malfunction. Common causes include Faulty wiring or connections in the center airbag sensor assembly circuit, Corrosion or damage to the communication circuit components, Issues with the airbag control module. 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
- B1790 indicates Center Airbag Sensor Assembly Communication Circuit Malfunction.
- Common causes
- Common causes include Faulty wiring or connections in the center airbag sensor assembly circuit, Corrosion or damage to the communication circuit components, Issues with the airbag control module.
- 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.
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Code B1790 Description
The B1790 diagnostic trouble code (DTC) indicates a Center Airbag Sensor Assembly Communication Circuit Malfunction. This code is specific to vehicles equipped with an airbag system, and it relates to a problem with the communication circuit within the center airbag sensor assembly. The center airbag sensor assembly is a crucial component of the vehicle's supplemental restraint system (SRS), responsible for detecting impacts and deploying airbags to protect occupants in the event of a collision.
Common Causes of B1790
- Faulty wiring or connections in the center airbag sensor assembly circuit.
- Corrosion or damage to the communication circuit components.
- Issues with the airbag control module.
- Impact or collision that damaged the center airbag sensor assembly.
- Electrical interference or short circuits affecting the communication circuit.
Symptoms of B1790
- Airbag warning light illuminated on the dashboard.
- Inability to deploy airbags in the event of a collision.
- Intermittent or erratic airbag deployment.
- Loss of communication with the center airbag sensor assembly.
- Vehicle failing safety inspections due to airbag system malfunction.
How to Fix B1790
- Begin by diagnosing the specific cause of the B1790 code using a diagnostic scanner to pinpoint the issue within the center airbag sensor assembly communication circuit.
- Inspect the wiring and connections in the circuit for any damage, corrosion, or loose connections. Repair or replace any faulty components as needed.
- Check the airbag control module for any malfunctions or errors. Replace the module if necessary.
- Clear the DTC and reset the airbag system to ensure the code does not reappear.
- Perform a thorough test of the airbag system to verify that the issue has been resolved and that the airbags deploy correctly in a controlled environment.
Cost to Fix B1790
The typical repair costs for addressing a B1790 code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for this repair can range from $100 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost for resolving a Center Airbag Sensor Assembly Communication Circuit Malfunction can be estimated to be between $200 and $800.
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Code B1790 Information for Specific Makes
- B1790 Buick — Driver Seat Motor Lumbar Circuit
- B1790 Cadillac — Driver Seat Motor Lumbar Circuit
- B1790 Chevrolet — Driver Seat Motor Lumbar Circuit
- B1790 GMC — Driver Seat Motor Lumbar Circuit
- B1790 Lexus — Center Airbag Sensor Assembly Communication Circuit Malfunction
- B1790 Pontiac — Driver Seat Motor Lumbar Circuit
- B1790 Saturn — Driver Seat Motor Lumbar Circuit
- B1790 Scion — Center Airbag Sensor Assembly Communication Circuit Malfunction
- B1790 Toyota — Center Airbag Sensor Assembly Communication Circuit Malfunction
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.
Frequently Asked Questions about B1790 Code
1. What are the common symptoms of OBDII code B1790 (Center Airbag Sensor Assembly Communication Circuit Malfunction)?
- Common symptoms include the airbag warning light illuminated on the dashboard, intermittent or constant issues with the airbag system, and potential non-deployment of the airbags in case of an accident.
2. What are the possible causes of OBDII code B1790?
- The code B1790 may be triggered by issues such as a faulty center airbag sensor assembly, damaged wiring or connectors in the communication circuit, or a communication breakdown between the sensor and the airbag control module.
3. How can I diagnose the source of OBDII code B1790?
- Diagnosis typically involves using a scan tool to read the trouble code, inspecting the wiring and connectors in the communication circuit, testing the center airbag sensor assembly, and checking for any loose connections or damage.
4. Can driving with OBDII code B1790 pose a safety risk?
- Yes, driving with this code present can be risky as it indicates a malfunction in the airbag system, potentially leading to non-deployment of airbags in the event of a collision. It is recommended to address the issue promptly.
5. Is it possible to reset OBDII code B1790 without fixing the underlying issue?
- Simply clearing the code without addressing the root cause is not recommended as it will likely reappear once the issue persists. It is crucial to diagnose and repair the problem to ensure the airbag system functions correctly.
6. Are there any DIY repair tips for fixing OBDII code B1790?
- DIY repair options may include checking and securing the wiring connections, inspecting for any visible damage, and ensuring the center airbag sensor assembly is properly connected and functioning. However, for complex issues, professional help may be necessary.
7. How much does it typically cost to repair OBDII code B1790?
- The cost of repair can vary depending on the exact cause of the code, the extent of the damage, and the labor rates in your area. It is advisable to consult a mechanic or dealership for a more accurate estimate.
8. Can OBDII code B1790 be triggered by a low battery voltage?
- Yes, low battery voltage or electrical issues can sometimes trigger communication circuit malfunctions, leading to the B1790 trouble code. Ensuring a healthy battery and electrical system can help prevent such issues.
9. Will OBDII code B1790 prevent my vehicle from passing an emissions test?
- In most cases, the B1790 code is related to the airbag system and should not affect the vehicle's emissions. However, it is essential to address the issue for safety reasons and to prevent any potential future problems.
10. How long can I safely drive with OBDII code B1790 before getting it repaired?
- It is recommended not to delay repairs for OBDII code B1790, especially since it involves the airbag system. Continuing to drive with this code unresolved may compromise the safety features of your vehicle, so prompt attention is advisable.
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