SRS light after door swap-scan tool WON'T connect - BMW M5 Forum and M6 Forums
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post #1 of 10 Old 18th May 2017, 10:50 AM Thread Starter
raymak
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Angry SRS light after door swap-scan tool WON'T connect

Changed driver side door. Disconnected battery. Removed all components. Swapped doors. Reinstalled new components including driver side airbag. However I believe my mistake was intermittently Re connecting the battery to check regulator functionality before disconnecting it once more to connect side airbag. So for a few minutes i think the car had power while the airbag was not connected (Total Mistake). Airbag light is on now. Only its unusual because I can't access the airbag system at all to reset it or find out what's wrong. It simply says "communication error". I've tried 3 different scan tools. Two of which were professional Indy shop tools that used the 20 pin to connect. Neither 14 or 20 pin connectors work. It continues to read "communication error". Ive disconnected and reconnected battery, checked fuses, disconnected and reconnected Airbag control module in center console. I just can't figure out how to clear it, if I can't even access the fault with a scan tool.

Any help would be greatly appreciated. I've searched previous threads and none of them had a twist like mine to where they had the light and couldn't even access ECU to reset.

My Beast is a 05/2000 M5
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post #2 of 10 Old 18th May 2017, 05:28 PM
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Will the tool read any of the car modules or is it just the airbag that won't communicate? Have you ever scanned the car before and it was able to connect? Are you able to read the DSC? If it won't read any of the car you could try pulling the main/DME relay, d/c battery, replug relay, reconnect battery as a reset.
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post #3 of 10 Old 18th May 2017, 07:15 PM
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05/2000 don't waste your time with the OBDII plug under the dash. You need the round plug under the hood. I know that does not help you get this fixed, but it will reduce the number of times you switch between them thinking the results maybe different.
Is there anything wrong in your cluster?
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post #4 of 10 Old 18th May 2017, 07:36 PM Thread Starter
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The scan tools do seem to be able to access the ECU when testing for other codes like the EGT sensor code and the Vanos code I had already fixed and cleared.

I did notice when I was trying to plug in the small red scanner to see if it was ready for smog it would "fail" on all the sensors.

I have been using the 20 pin connector but still won't communicate with the SRS and says communication error.

Also nothing at all wrong with the cluster. Only issue is the airbag light present on the lower right side.

Last edited by raymak; 18th May 2017 at 07:37 PM.
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post #5 of 10 Old 18th May 2017, 08:48 PM
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The OBD plug only reads the engine and some of the body codes in the early cars pre 09/2000 IIRC. Try plugging in in different key positions. Try plugging in with car running then key position2 etc. Try different combos. Usually only works for the OBD plug but try.
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post #6 of 10 Old 19th May 2017, 03:51 AM Thread Starter
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I just went to the BMW dealership to see if they can reset..... They couldn't. They said the airbag control module is faulting and needs to be replaced. It was working just fine right before the swap. Is this common as to where something like this can go back because of simply unplugging airbag?

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post #7 of 10 Old 19th May 2017, 06:22 PM
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Modules can get fried if you unplug then replug with the battery connected. Whenever I work on any electronics I d/c the battery first and don't reconnect it until everythings done.
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post #8 of 10 Old 19th May 2017, 06:27 PM
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post #9 of 10 Old 19th May 2017, 08:45 PM Thread Starter
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I located it..... ugh! That's gonna be a pain in the *** to get to. I take it you removed the entire center console? Or were you able to sumhow work around?
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post #10 of 10 Old 19th May 2017, 09:39 PM
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There are two screws on the sides of the center console near the middle. If you take those out, you can lift from the back just enough to get in there, but your hands are going to hate you. A lot of sharp bits...

You'll probably need to code the module to your car, PASoft works well here.
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