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Old 05-17-2017, 08:31 PM   #1
joevalinsky
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Fixed one problem, created another (airbag light)

I have a 2000 four door e46, 323i and put in new window regulator in the driver side front door. In doing so I disconnected the battery and removed the air bag. Well now the air bag light is on that wasn't b4. I can live with the light being on if the other 3 airbags will deploy in the event of an accident. Is this the case or will none of them work? Any simple fixes a simple man can try?
Thanks joe
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Old 05-17-2017, 08:41 PM   #2
jfoj
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You need software or a tool to read and reset the airbag error.

Unlike many of the American cars, most of them will clear the airbag light automatically if the error is repaired.

Chances are you either did not correctly plug the airbag connector together, you forgot to disconnect the battery while the airbag was removed or connected the battery to move the window while the airbag was disconnected.
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Old 05-17-2017, 11:00 PM   #3
scottjoh
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Fixed one problem, created another (airbag light)

Quote:
Originally Posted by joevalinsky View Post
I can live with the light being on if the other 3 airbags will deploy in the event of an accident. Is this the case or will none of them work?
None of them will deploy in an accident if the light is ON. See quote from the Bentley manual on the subject. It's pretty clear! Airbag won't be triggered in an accident if the Airbag fault light is on. Not sure where jfoj is getting his information from. Maybe just wishful thinking.

The system will not reset itself. You can get a Peake SRS reset tool off eBay, use it on your car then resell it. Make sure you get the round plug version if you have the round diagnostic connector under the hood otherwise get the OBD-II connector version. The round plug under the hood was deleted half way through the 2000 model year.
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Old 05-17-2017, 11:16 PM   #4
SSchwab
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I bought the cheap knockoff round plug airbag reset tool off ebay when I bought my 2000 Z3, and it did the job...eventually.
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Old 05-18-2017, 05:34 AM   #5
jfoj
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I highly doubt none of the airbags would deploy if there was an accident.

Making a parallel argument would be like saying the engine will not start if the SES/CEL/MIL is lit.

It works like this, the problem is we do not know what the current airbag light is for. Lets say it is for an impact sensor that the module does not detect, then this could in fact cause a non deployment of airbags. If the sensor is required for deployment and say the connector is not fully seated, then yes, this could inhibit deployment.

But we have a situation where there was clearly work in an area where a window regulator was being replaced and we would have to assume that the SRS error is associated with an airbag fault in the area the work was being performed.

Then lets take this at bit further, if the airbag was disconnected and the ignition was turned on, then there would have been an error generated that basically indicated the airbag was not present or could not be detected by the system. But if the airbag was plugged back in properly, the system is not designed to self clear the fault.

Looking at this from a design standpoint, this is a safety related system, I would expect if this error was for a loss of an airbag signal, the system would not be put into a stand by mode. I would expect that the designers would still attempt to trigger the airbag as needed whether it was there or not. This would be the proper way to program the logic, not to set the complete system into a standby mode due to a single output circuit fault.

As for reading and clearing the code. You do not have to have a tool with the round connector, you can use a tool with the standard 16 pin OBDII connector. BUT you will need a 20 pin round DLC to 16 pin OBDII adapter cable that you can get on Amazon or Ebay for around $10. This adapter cable will need to be connected to the under hood round 20 pin DLC connector in order to communicate with the airbag system if your car has the 20 pin round DLC connector under the hood.

Something like this may work along with the adapter cable which appears to be included with the tool??- https://www.amazon.com/KKmoon-Airbag...W+airbag+reset

I have not used this tool, but for the most part the reviews are pretty good.

One clearly states you cannot just immediately go to the Clearing option, you must read the codes first. This actually makes good sense.

This tool will not clear the codes/light if the problem is not fixed, this is how it should work, if the fault still exists the light will immediately come back on and the fault will still be present. This is normal, the problem needs to be repaired before the code(s) and light can be cleared.

YMMV, but looks to be an adequate solution, also depends on what the problem is with your car and if the connector was damaged when removing the airbag connection.
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Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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Old 05-18-2017, 11:39 AM   #6
SSchwab
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Be careful when buying the knockoff versions of Peake reset tools.

While the descriptions say air bag and SRS tool, there are separate tools for air bag and service interval resets.
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Old 05-18-2017, 11:45 AM   #7
SSchwab
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I just checked, and the tool I bought is the 16 pin, with a 20 pin attachment cord. Also, it is the B800 tool.
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Old 05-18-2017, 12:46 PM   #8
jfoj
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Do yourself a favor and do not spend any money on a Peake tool. They are WAY beyond their prime and are WAY over priced.

You should start with a simple basic tool like what was linked and you will hopefully be successful with resolving the problem.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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Old 05-18-2017, 01:58 PM   #9
SSchwab
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Agreed. Don't buy a new Peake tool for a one time use air bag light reset. But if you buy the knockoff like I did, buy the correct knockoff, and don't trust the descriptions on eBay. Search the model number iand learn if that model solves your problem.

You can also try finding a fellow enthusiast in your area to use their tool.
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Old 05-18-2017, 04:16 PM   #10
scottjoh
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Quote:
Originally Posted by jfoj View Post
I highly doubt none of the airbags would deploy if there was ...


The things I've read in the Bentley manual and BMW WDS sure sound like where there is a SRS fault the system is disabled and nothing will fire. I've never seen anything say that if this fails then that won't work and when this fails, that won't work. When there is a SRS fault the system is disabled seems pretty clear. If someone can find official BMW documentation to the contrary then I believe that the system is not going to work at all.
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Old 05-19-2017, 11:59 AM   #11
Archbid
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You can reset with a $20 tool from Amazon. I used Carly app on iPhone.




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