B2779 Code - Passenger Side Curtain Air Bag Module Circuit Short To Body Ground
Quick Answer
The Sophisticated Air Bag Sensor (SAS) Control Module monitors the Passenger Side Curtain Air Bag Module. Common causes include Faulty Passenger Side Curtain Air Bag Module, Passenger Side Curtain Air Bag Module harness is open or shorted, Passenger Side Curtain Air Bag Module circuit poor electrical connection. 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
- B2779 indicates Passenger Side Curtain Air Bag Module Circuit Short To Body Ground.
- Common causes
- Common causes include Faulty Passenger Side Curtain Air Bag Module, Passenger Side Curtain Air Bag Module harness is open or shorted, Passenger Side Curtain Air Bag Module circuit poor electrical connection.
- 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.
Code B2779 Description
What are the Possible Causes of the DTC B2779?
- Faulty Passenger Side Curtain Air Bag Module
- Passenger Side Curtain Air Bag Module harness is open or shorted
- Passenger Side Curtain Air Bag Module circuit poor electrical connection
- Faulty Sophisticated Air Bag Sensor (SAS)
How to Fix the DTC B2779?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B2779 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- B2779 Lexus — Engine Starter Communication Malfunction
- B2779 Mazda — Passenger Side Curtain Air Bag Module Circuit Short To Body Ground
- B2779 Nissan — PTC Heater Communication
- B2779 Scion — Engine Starter Communication Malfunction
- B2779 Toyota — Engine Starter Communication 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 B2779 Code
1. What are the common symptoms of OBDII code B2779?
- Common symptoms include the airbag warning light being illuminated on the dashboard, issues with the passenger side curtain airbag deployment, and a potential fault in the airbag system.
2. What causes the OBDII code B2779 to occur?
- This code is typically triggered by a short circuit between the passenger side curtain airbag module and the body ground, which can be caused by damaged wiring, faulty connectors, or a defective airbag module.
3. How can I diagnose the OBDII code B2779?
- Diagnosing this code usually involves using a professional OBDII scanner to retrieve the code, inspecting the wiring and connectors related to the passenger side curtain airbag module, and performing continuity tests to identify the location of the short circuit.
4. Is it safe to drive with OBDII code B2779 present?
- It is not recommended to drive with this code active, as it indicates a potential issue with the passenger side curtain airbag system, which may compromise its functionality in the event of a collision.
5. How can I repair OBDII code B2779?
- Repairing this code involves locating and repairing the short circuit between the passenger side curtain airbag module and the body ground. This may require repairing or replacing damaged wiring, connectors, or the airbag module itself.
6. Can I reset OBDII code B2779 without fixing the issue?
- While you can clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent potential safety risks associated with the passenger side curtain airbag system.
7. Are there any safety precautions to follow when working on OBDII code B2779?
- When working on the airbag system related to this code, it is essential to disconnect the vehicle's battery and wait for at least 10 minutes before starting any repairs to avoid accidental airbag deployment.
8. Can a DIY enthusiast fix OBDII code B2779 at home?
- While some DIY enthusiasts may have the skills to diagnose and repair this code, working on the airbag system can be dangerous. It is recommended to seek professional help to ensure the repair is done correctly and safely.
9. How much does it cost to repair OBDII code B2779 at a repair shop?
- The cost of repairing this code can vary depending on the extent of the damage and the specific components that need to be replaced. It is advisable to get a diagnostic and repair quote from a reputable repair shop.
10. Will OBDII code B2779 cause my vehicle to fail an emissions test?
- This code is related to the passenger side curtain airbag system and should not impact your vehicle's emissions. However, it is still important to address the issue promptly to ensure the overall safety of the vehicle.
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