Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E70) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-18-2016, 10:39 PM
Member
 
Join Date: May 2016
Location: SF Bay Area
Posts: 45
BergA is on a distinguished road
Airbag light (93B4 & 93A8) and Clock Spring Replacement

Hi all,

A couple weeks ago I drove over a speed bump while turning and I received the "Pass. Restraint System" fault on the iDrive screen, accompanied by the seat belt and airbag lights on the dash. Scanning with the Carly adapter showed 93B4, or "Driver Side Stage 2 airbag". Uh oh, that sounds serious! After resetting the error, it came on about a mile later when I hit another bump in the road. This time, I received 93A8 fault, which Carly misdiagnosed as "Central control timeout" but google reveals to be "Driver Side Stage 1 airbag."

Basically, these errors mean that the airbag ECU is not seeing both of the airbag's 2.2Ohm resistances that it should. The driver's side airbag, located in the steering wheel (the one we all got recall notices about) has two stages, each with its own connector and 2.2Ohm resistor. If the airbag ECU doesn't see the 2.2Ohm resistance, a fault is thrown.

To confirm the problem:
1. STORE YOUR PRESETS and disconnect the battery.
2. Remove the driver's side airbag by inserting a screwdriver through the tiny slots in the leather. Check this video for hints: https://www.youtube.com/watch?v=7iZG8Y0Wm6Q
3. Disconnect the two airbag connectors. Again, make sure your battery is disconnected first. To separate the connectors, pry the thin clip away from the airbag with a flat blade screwdriver.
4. Disconnect the left connector leading into the clock spring. These are the airbag wires.
5. Pins are 1-6 from left to right. Check resistance of pins 1&2 and 3&4. Both pairs should be ~7.3kOhms. If they are not, congrats! You have a damaged clock spring or wire harness leading into the airbag ECU.

At this point, I wanted to see if I could repair my clock spring rather than buying a replacement. ($50 is a lot!) Following advice on the web, I removed the clock spring by first removing the steering wheel, then the upper and lower cowls around the steering column. More detailed instructions here: My $0.02 Steering Angle Sensor Fix

After opening the cover of the clock spring, I discovered the problem: there was a "kink" in the ribbon cable which was causing intermittent contact. I did successfully solder the cable back together, but I have no hope as a long-term repair so I did order a replacement from eBay.

When reassembling, make sure you follow BOTH index marks (one on the steering wheel, the other on the steering angle sensor). Failing to misalign the steering angle sensor will cause a 4x4 error light after you reach 20mph. See more details here, pic 7 and 10: My $0.02 Steering Angle Sensor Fix
Attached Images
        
Reply With Quote

Sponsored Links

  #2  
Old 02-14-2018, 07:36 PM
jayjay_dee's Avatar
Member
 
Join Date: Aug 2007
Location: Pearland, TX
Posts: 1,356
jayjay_dee is on a distinguished road
Im getting the same exact issue right now on my 2010 BMW X5 35d.

I had the dealer do the airbag recall on the passenger side and when its time to pick my X5 up, i got the DSC 4x4 error. Brought it back and then the next day, got the Passenger restraint system error. Now, they want me to pay for the part (labor is free), to replace the SZL, because the service manager said they never have to touch the steering wheel when they replace the passenger airbag so it must have been a coincidence that the SZL went bad on its own while they were working on it.

I didnt agree with them.
__________________
"Lapit mga kaibigan at makinig kayo, ako'y may dala-dalang balita galing sa bayan ko
Nais kong ipamahagi ang mga kwento at mga pangyayaring nagaganap sa lupang ipinangako..."
Reply With Quote
  #3  
Old 03-27-2018, 12:55 PM
Member
 
Join Date: Mar 2018
Location: NJ
Posts: 9
mamet is on a distinguished road
I am new to the whole BMW world so please bare with me..... I have 2010 X5 35D with the same issue. But here is how it happened. I initially had passenger matt sensor fault. I took it to a guy who said he will disable it via the software and no need for dongles. Then I got a call from him telling me that he was able to disable the Matt sensor but my car has ACSM: Driver's airbag, stage 2. I took the car back and after I have been learning I got ISTA installed and I was able to pull the code he was talking about. However, It turns out the code mileage existent was around the time he had the car. So I am guessing he did something that triggered the computer to trigger this code. I also checked the resistance of the airbag, the clockspring and the wires connect to the airbag and am getting the expecting resistance reading. Any Idea how to go by fixing this or troubleshooting it further? ISTA stated if all checks out check the airbag module next, I have been looking all over the web on the location of the module and nothing. How can I revert what this guy did? what tool to use. Can I use ISA/p for that or NCS? Thanks!!
Reply With Quote
  #4  
Old 03-27-2018, 01:41 PM
Member
 
Join Date: Jun 2011
Location: Hermosa Beach, CA
Posts: 264
wsmeyer is on a distinguished road
Nice detective work. I would have just cut it at the kink and soldiered the ends directly onto the connector and called it a permanent fix.
Reply With Quote
  #5  
Old 03-27-2018, 02:44 PM
Member
 
Join Date: Mar 2018
Location: NJ
Posts: 9
mamet is on a distinguished road
Quote:
Originally Posted by wsmeyer View Post
Nice detective work. I would have just cut it at the kink and soldiered the ends directly onto the connector and called it a permanent fix.
Thanks for your reply!!! Do you think my issue is the open circuit of the Matt sensor they disconnected after disabling it? How can I revert the changes made to the Matt sensor?
Reply With Quote
  #6  
Old 03-29-2018, 04:57 PM
Member
 
Join Date: Jul 2013
Location: Austin, TX
Posts: 207
Davidf is on a distinguished road
Quote:
Originally Posted by jayjay_dee View Post
Im getting the same exact issue right now on my 2010 BMW X5 35d.

I had the dealer do the airbag recall on the passenger side and when its time to pick my X5 up, i got the DSC 4x4 error. Brought it back and then the next day, got the Passenger restraint system error. Now, they want me to pay for the part (labor is free), to replace the SZL, because the service manager said they never have to touch the steering wheel when they replace the passenger airbag so it must have been a coincidence that the SZL went bad on its own while they were working on it.

I didnt agree with them.
Exact same thing happened to me. Took '08 4.8i in for passenger airbag and fuel pump and was greeted with 4x4, DSC, backup camera, active steering faults and right turn signal would not cancel. Dealer said SZL failed and was causing steering angle sensor to not initialize. $500 some odd dollars later I get my car back from recall work...ugh! I paid for part, dealer donated labor. Why do I still feel like the one that got screwed?

I am thinking the entire dash comes out and hence they do touch the drivers side airbag and break things along the way.
Reply With Quote
  #7  
Old 03-29-2018, 09:43 PM
ard ard is offline
Member
 
Join Date: Mar 2006
Location: Sierra Foothills, California
Posts: 6,731
ard is on a distinguished road
Nice thread.

(Kudos for having the balls to post that solder picture.)



Finally, for new folks. OPs prior contributions are notable:

https://xoutpost.com/bmw-sav-forums/...e-e70-n55.html

Reply With Quote
  #8  
Old 03-07-2020, 04:27 PM
Member
 
Join Date: Mar 2016
Location: Tricities, TN
Posts: 406
daytonatrbo is on a distinguished road
I just cleared an error for "Airbag Fahrer Stg 1" which is actually the passenger side from what I can gather. Its coded as 93A8A0 in INPA.

I cleared the error and sat and idled in the drive for 15 minutes and it didn't come back.

But I'm glad I found this thread because my heated steering wheel recently stopped working and I can only assume the issue is in the clock spring.
__________________


2009 xDrive35D
Comfort seats, Tech, Premium, Cold Weather, Sport w/ Adaptive Drive, Extended Nappa Leather
Deleted & Stg 2+ Tune for over 115k miles
227k on the clock
Being replaced by a 2016 X5d
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 08:00 PM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.