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Driver side air bag light on, horn and cruise control not working

Discuss problems you have had or are having with your Z4
05_3.0i_zoom
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Driver side air bag light on, horn and cruise control not working

Post by 05_3.0i_zoom » Wed Jul 07, 2021 6:44 pm

Hello all community members!!!

I recently purchased a 2005 z4 3.0 ltr which has a clean title but the airbags light stays on, horn does not work (i can hear the relay go click when i pressed the horn) and the cruise control does not work :( I recently purchased an aftermarket clockspring and replaced it but all the issues persist. Does someone have an idea what may be wrong?

TIA

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Zulu4
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Driver side air bag light on, horn and cruise control not working

Post by Zulu4 » Wed Jul 07, 2021 9:25 pm

Hello and welcome.
I think I'd start by scanning the car for faults for the airbag and cruise.
You could put a voltmeter across one of the horns. You should be able to get to one by opening up the lower (fog light) panel in the wheel arch.
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05_3.0i_zoom
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Driver side air bag light on, horn and cruise control not working

Post by 05_3.0i_zoom » Wed Jul 07, 2021 11:12 pm

Is there a particular obd2 scanner I should buy or use?

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Zulu4
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Driver side air bag light on, horn and cruise control not working

Post by Zulu4 » Thu Jul 08, 2021 9:14 am

I use this cable running the BMW factory software (thanks to colb for the recommendation).
https://www.ebay.co.uk/itm/BMW-DIAGNOST ... 635-2958-0

It is really in-depth and useful, but a bit clunky to set up and use.
Others here prefer more user friendly kit, I'm sure someone will be along soon to recommend....
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Driver side air bag light on, horn and cruise control not working

Post by 05_3.0i_zoom » Thu Jul 08, 2021 5:46 pm

Thank you. The item listed does not post to united states :/

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Driver side air bag light on, horn and cruise control not working

Post by 05_3.0i_zoom » Thu Jul 08, 2021 6:38 pm

Just bought it on bcables.com :) Hopefully I get it soon.

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Zulu4
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Driver side air bag light on, horn and cruise control not working

Post by Zulu4 » Thu Jul 08, 2021 7:45 pm

OK. Good luck.
You can use the bundled INPA software to scan for faults.
2007 3.0si Auto Sport Roadster. Whippy.
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2003 3.0i SE Roadster. Whippy.

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Driver side air bag light on, horn and cruise control not working

Post by 05_3.0i_zoom » Sat Jul 10, 2021 7:09 pm

Can you direct me where I can get a legit service manual as well? My automatic soft top does not work :(

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Driver side air bag light on, horn and cruise control not working

Post by Zulu4 » Sat Jul 10, 2021 7:27 pm

There are loads of threads about soft top motor fixes on this forum. Use the search function (or google) and I'm sure you'll find some good info.

Add a post here perhaps with your exact problem as more people will see it : viewtopic.php?f=3&t=130200
2007 3.0si Auto Sport Roadster. Whippy.
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2003 3.0i SE Roadster. Whippy.

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Driver side air bag light on, horn and cruise control not working

Post by 05_3.0i_zoom » Sat Aug 07, 2021 3:56 am

Zulu4 wrote: Thu Jul 08, 2021 7:45 pm OK. Good luck.
You can use the bundled INPA software to scan for faults.
I got the bcables but does not work as intended on my 05 z4.. I checked if pin 7 8 were soldered together amd indeed they were.. should i separate?

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Driver side air bag light on, horn and cruise control not working

Post by Zulu4 » Sat Aug 07, 2021 9:32 am

I only had to fiddle with the operating system to get it to work (can't remember exactly, but it may have needed a different version of .NET Framework or Java). The cable was fine as it was. I use an old Windows XP 32 bit laptop.

Edit: Just tested my cable and pins 7 & 8 don't seem to be connected, but 1 & 2 plus 4 & 5 are.
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2007 3.0si Auto Sport Roadster. Whippy.
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2003 3.0i SE Roadster. Whippy.

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Driver side air bag light on, horn and cruise control not working

Post by 05_3.0i_zoom » Sat Aug 07, 2021 11:49 am

Will it be the same case for my 05 3i?

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Driver side air bag light on, horn and cruise control not working

Post by colb » Sat Aug 07, 2021 12:00 pm

The BMW INPA software can be problematic getting it set up on a laptop despite the suppliers claim its one click install, dont give up its settings or drivers usually. I recently had an airbag light self inflicted switched on whilst I had a seat out when I tested heated seat wiring I installed. Couldnt clear the light after I put the seat backin using INPA and BMW Scanner 1.4 on the laptop.
Decided to invest in a handheld scanner for portability and went for a Creator 310+ via ebay, circa £50, well impressed, found my aitrbag fault first go and cleared it with light extinguished, it was passenger satellite airbag sensor. Also have a cheap B800 airbag tool but didn't have it as it was out on loan thats available on ebay as well.
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Driver side air bag light on, horn and cruise control not working

Post by Zulu4 » Sat Aug 07, 2021 12:06 pm

05_3.0i_zoom wrote: Sat Aug 07, 2021 11:49 am Will it be the same case for my 05 3i?
I would have thought so, but someone more knowledgeable may come along....

Edit: Ah, I see colb is here to the rescue. :D
2007 3.0si Auto Sport Roadster. Whippy.
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2003 3.0i SE Roadster. Whippy.

05_3.0i_zoom
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Driver side air bag light on, horn and cruise control not working

Post by 05_3.0i_zoom » Sat Aug 07, 2021 4:47 pm

colb wrote: Sat Aug 07, 2021 12:00 pm The BMW INPA software can be problematic getting it set up on a laptop despite the suppliers claim its one click install, dont give up its settings or drivers usually. I recently had an airbag light self inflicted switched on whilst I had a seat out when I tested heated seat wiring I installed. Couldnt clear the light after I put the seat backin using INPA and BMW Scanner 1.4 on the laptop.
Decided to invest in a handheld scanner for portability and went for a Creator 310+ via ebay, circa £50, well impressed, found my aitrbag fault first go and cleared it with light extinguished, it was passenger satellite airbag sensor. Also have a cheap B800 airbag tool but didn't have it as it was out on loan thats available on ebay as well.
Problematic yes! I had to spend at least an hour to have it just detect the cable. Was very frustrating. What was the factors that led you to purchase Creator 310+? Youtue, amazon ratings, personal experience? Excited to hear back soon.. :driving:

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