B1143 Nissan Code - Diagnosis Sensor Unit
Quick Answer
The Air Bag Diagnosis Sensor Unit detects the whole Supplemental Restraint System (SRS) electrical system and displays the malfunction either by illuminating or blinking the air bag warning lamp in the combination meter. Common causes include Faulty Diagnosis Sensor Unit, Diagnosis Sensor Unit harness is open or shorted, Diagnosis Sensor Unit 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
- B1143 Nissan indicates Diagnosis Sensor Unit.
- Common causes
- Common causes include Faulty Diagnosis Sensor Unit, Diagnosis Sensor Unit harness is open or shorted, Diagnosis Sensor Unit 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 B1143 Nissan Description
The Air Bag Diagnosis Sensor Unit contains the “G†sensors for both frontal and side collisions and spare battery function in case of main battery damaged in a collision.
What are the Possible Causes of the DTC B1143 Nissan?
- Faulty Diagnosis Sensor Unit
- Diagnosis Sensor Unit harness is open or shorted
- Diagnosis Sensor Unit circuit poor electrical connection
How to Fix the DTC B1143 Nissan?
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 B1143 Nissan 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.
Need more information about the B1143 Nissan code?
Need more information on how to fix the B1143 Nissan code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1143 Nissan code diagnosed by a professional: Find a repair shop in your area
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 B1143 Nissan Code
1. What does the OBDII code B1143 for Nissan indicate?
The code B1143 in Nissan vehicles specifically relates to the Diagnosis Sensor Unit.
2. What are common symptoms of a B1143 Nissan code?
Common symptoms include airbag warning lights illuminated on the dashboard and potential malfunction of the airbag system.
3. What are the possible causes of the B1143 code in Nissan vehicles?
The B1143 code in Nissan cars is typically triggered by a fault in the Diagnosis Sensor Unit or related wiring issues.
4. How can I diagnose a B1143 code in my Nissan vehicle?
Diagnosis of the B1143 code usually involves using a professional OBDII scanner to read the specific error code and pinpoint the issue with the Diagnosis Sensor Unit.
5. Can I repair a B1143 code in my Nissan at home?
Repairing a B1143 code often requires technical expertise and specialized tools, so it is recommended to consult a qualified mechanic for proper diagnosis and repair.
6. Is it safe to drive my Nissan with a B1143 code?
It is not advisable to drive your Nissan with a B1143 code as it indicates a potential issue with the airbag system, which is crucial for your safety in case of an accident.
7. Are there any DIY tips to troubleshoot a B1143 code in a Nissan?
While basic checks like ensuring the Diagnosis Sensor Unit connections are secure may help, diagnosing and repairing a B1143 code typically require professional assistance.
8. How much does it cost to fix a B1143 code in a Nissan?
The cost of fixing a B1143 code can vary depending on the root cause of the issue, parts needed for replacement, and labor costs, so it is recommended to get a quote from a mechanic.
9. Can a B1143 code reset itself in a Nissan?
In some cases, the B1143 code may reset itself if the underlying issue is temporary. However, it is still important to have the system checked to ensure proper functioning.
10. How long does it take to repair a B1143 code in a Nissan?
The repair time for a B1143 code can vary based on the extent of the issue and availability of parts. It is best to consult with a mechanic for a more accurate estimate.
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