Nissan Airbag Module Retains Permanent Codes

Michael Mobile Technician Clinton, Utah Posted   Latest  
Discussion
Collision
2015 Nissan Sentra S 1.8L (MRA8DE) 6-spd (RS6F94R)
Permanent Codes

This is a follow up on my previous article. I got another call from the body shop mentioned in "Are Pre and Post Scans Important" They said they still needed a reset done on the Nissan due to the Airbag light being on. I went over and scanned the vehicle again. They had missed another pre-tensioner. The sad thing about this is that the Airbag module appears to be forever tainted with the codes stored even though there has been no deployment. This could be a real problem with forensics if the module was ever used for legal purposes. All the more reason to do pre-scans. Best practice would be to replace the control module again. I doubt any body shop will do that.

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Bill Owner/Technician
Jackson, Michigan
Bill Default
 

Michael - with forensics comes analysis of stored data... Why would it be in best practice to replace the module again? Do we not just have faults that were set KOEO?? what would be the difference if one key cycled a vehicle that was partially disassembled waiting on parts? Thanks for the conversation 😁

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Michael Mobile Technician
Clinton, Utah
Michael Default
 

Hi Bill, My opinion is that the argument may be that the airbag or module went open at the time of the crash and that prevented it from deploying. It would suggest a history of airbag issues "ever since" the latest repair. We could try to explain it to a jury but who are they going to side with? The best way to avoid having codes is to power up the system after all identified parts are…

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Steven Instructor
Cumming, Georgia
Steven Default
 

Michael, I believe the "best practice" you are promoting is to complete the Pre and Post Scans in every case...true?

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Michael Mobile Technician
Clinton, Utah
Michael Default
 

What I was suggesting is that if the repair facility missed something and it tainted the Airbag Control Module, it would be best if it were replaced again. This facility did not do a pre-scan and therefore missed the failed parts.

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Mike Owner/Technician
Clifton, New Jersey
Mike Default
 

Mike, my first question is was the control module replaced from the beginning? It appears to be the same 2 codes on both of your posts. Did they replace both the seat belt and the buckle? On some vehicle seat belts have pretensioners on both the belt side and the buckle side. This goes right back to your original question, the answer is resounding YES, pre and post scans are a must in the…

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Michael Mobile Technician
Clinton, Utah
Michael Default
 

Hi Mike, There were no Pre-Scans done. When they did the repair after I gave them the results of my scan, they only replaced the locked seat belt. From what I could tell, the buckle did not have a pre-tensioner. It looked like from parts diagram, there was an additionals pre-tensioneron the strap. Had they replaced all three parts before connecting the battery, then the report would have been…

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Michael Mobile Technician
Clinton, Utah
Michael Default
 

Here is an example of a CYA on a pre-scan. A body shop called me to check a vehicle before starting repairs. It was an older Toyota with 225K on the odometer. The airbag light was on. The vehicle had hit a deer. There was no deployment. My scan revealed that the driver's airbag was open. No other Airbag codes. I also noted that the steering wheel controls were not working. I suggested that the…

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