Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E85 / E86 Z4 (2003-2008)

E85 / E86 Z4 (2003-2008)
E85 Z4 Roadster, E86 Z4 Coupe, E85 Z4 M Roadster, and E86 Z4 M Coupe talk with our BMW gurus here.

Reply
 
Thread Tools Display Modes
  #1  
Old 05-29-2016, 10:46 AM
Clearancediver's Avatar
Clearancediver Clearancediver is online now
Officially Welcomed to the 'Fest
Location: Victoria BC, Canada
 
Join Date: Oct 2012
Posts: 502
Mein Auto: 2004 Z4, 2009 Nomad mc
SRS light and BST cable issue

I just had the SRS (airbag) light on my dash come on last week after 2 1/2 years ... Since it had been fixed by BMW tech so I was pretty sure it was the same issue back again.

Diagnostics code indicated increased resistance in the right pillar system.. But despite cleaning the under seat connection and the SRS BST connection clipped to the battery main power terminal in the battery compartment that was the cause last time it refused to clear.

Short story is that after a few days of screwing around/research I checked continuity on the BST cable and confirmed that it was good... Spread the pins slightly on the connection to ensure that the connector was making good connection and cleared the code once again.

Error cleared and has stayed clear....

Click image for larger version

Name:	ImageUploadedByBimmerApp1464543530.722288.jpg
Views:	55
Size:	12.3 KB
ID:	565089Click image for larger version

Name:	ImageUploadedByBimmerApp1464543569.800868.jpg
Views:	55
Size:	12.7 KB
ID:	565090Click image for larger version

Name:	ImageUploadedByBimmerApp1464543602.482056.jpg
Views:	66
Size:	21.9 KB
ID:	565091

The BST Is the blacked sheathed twisted pair wire leading to the battery terminal. It fires a squib to electrically disconnect the battery cable from the battery cable terminal in case of accident. Not all cars have this but if your battery is in trunk it's more than likely.....

I zap strapped the connector and where it mounts to the side of the power terminal to ensure it doesn't move.

Last edited by Clearancediver; 05-29-2016 at 11:13 AM.
Reply With Quote
Advertisement
  #2  
Old 05-29-2016, 11:25 AM
Clearancediver's Avatar
Clearancediver Clearancediver is online now
Officially Welcomed to the 'Fest
Location: Victoria BC, Canada
 
Join Date: Oct 2012
Posts: 502
Mein Auto: 2004 Z4, 2009 Nomad mc
f you don't know what a squib is... It's a small explosive charge ... It blows the battery cable back some 20-30mm in the battery cable terminal to physically disconnect the battery from the electrical system. It's an expensive piece of wire/labour to replace so if you don't know what you are doing with a meter don't check the continuity...
Reply With Quote
  #3  
Old 05-31-2016, 04:57 PM
shipkiller's Avatar
shipkiller shipkiller is offline
Underway on Nuclear Power
Location: Virginia Beach, VA
 
Join Date: Nov 2007
Posts: 1,114
Mein Auto: Me
This might help with your troubleshooting.
Attached Files
File Type: pdf Battery Safety Terminal and Monitoring.pdf (16.2 KB, 59 views)
__________________
.
.
How does something immoral, when done privately, become moral when it is done collectively?
Furthermore, does legality establish morality?
Slavery was legal; apartheid was legal; Stalinist, Nazi, and Maoist purges were legal. Clearly, the fact of legality does not justify these crimes. Legality, alone, cannot be the talisman of morel people. - Walter E. Williams
Reply With Quote
  #4  
Old 05-31-2016, 06:30 PM
Clearancediver's Avatar
Clearancediver Clearancediver is online now
Officially Welcomed to the 'Fest
Location: Victoria BC, Canada
 
Join Date: Oct 2012
Posts: 502
Mein Auto: 2004 Z4, 2009 Nomad mc
Thank you... Added to my treasure trove of pdf's on the car.
Reply With Quote
  #5  
Old 05-31-2016, 06:38 PM
Derekz4 Derekz4 is offline
Officially Welcomed to the 'Fest
Location: yorba linda
 
Join Date: Sep 2015
Posts: 102
Mein Auto: Z4
Quote:
Originally Posted by clearancediver View Post
thank you... Added to my treasure trove of pdf's on the car.
+1
Reply With Quote
Reply

See More Related BMW Stories


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E85 / E86 Z4 (2003-2008)
Today's Posts Search
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 On



Forum Jump


All times are GMT -7. The time now is 12:27 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
© 2001-2015 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms