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E85 / E86 Z4 (2003-2008)
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Old 01-28-2013, 06:09 AM
Trapper Trapper is offline
I'd rather by driving
Location: Sudbury
Join Date: Jun 2012
Posts: 111
Mein Auto: 2003 Z4 2.5 Titanium Silv
SRS Code 38 swinging voltrage test

Hi Guys,

I need your help. Here is the background info. I had my passenger seat out of my car to repair the seat tilt mechanism. Never put the key in the ignition while the seat was out. Reinstalled the seat and check dash lights - no air bag issue.

A few days later I was installing a battery tender because the car will be stored for the winter. The ignition was off but I was listening to the stereo as I was installing the lugs onto the battery terminal posts the radio cut out very briefly but came back on. I guess as I was attaching the battery tender lug I momentarily disconnected the battery. The radio kept playing so I was relieved I didn't have to worry about radio codes. The next time I started the car I noticed the air bag light (red) was on. So I bought a B800 SRS scan reset tool.

The SRS gave me a table 01 code 38 Control Unit Fault - Swinging Voltage Test.

I figured it would be a simple reset because I disconnected the battery but I am unable to reset it . One thing to mention is I did have the battery tender going when I did the scan and attempted reset. Not sure if that is affecting things. Also The car never left the garage between reinstalling the seat and hooking up the battery tender.

I searched this forum and the web without any luck.

Any suggestions?

Last edited by Trapper; 01-28-2013 at 09:54 AM.
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