Traction control fault message?

[Steve McF]

So since my last post on this, I have barely used the car. Been busy trying to get two of our other cars through MOT, which they did (one straight through no probs, the other with a bit of work following a fail  ). I'm also in the process of getting my garage floor sorted (door threshold fitted, conrete floor prepped/primed/painted, hooks on the wall for ladders etc), and navigating around a calender that my missus keeps filling up with other stuff which slows me down!!!!! 

Anyway, daughter came back for a few days yesterday and said she needed my 107 this week, so step forward the 9-3 on work transport duty again. Now each time I go out in it, I expect the traction control fault to appear at some point. Normally once it has done, there are no further issues, although the light is on on the dash. But I wouldn't risk a long journey in it. It's about 10 miles to work, so this morning, I took the Saab. Got part way through the journey and the road was closed, and the diversion sent me on single track back roads cross country. Everything was OK till i got to a T junction where I had to turn right onto a busy road. When I got the chance, I pulled out in spirited fashion so as not to cause anyone to have to brake etc, and as I was accelerating - bing bong traction control system fault - I pressed the clear button to clear the message on the SiD and the car carried on as normal.

But a couple of miles further on and I was in traffic, but all moving at 30mph through a village. The guy in front slowed to let a truck out of a junction, so I slowed too, probably to about 20mph, and then we put our foots down to pick up speed again......only when I pressed the accelerator pedal, the car continued to slow down/no power. I blipped the pedal and pressed it down further and then the power came back. There was no bing bong at this point, but I have never experienced that before, and the engine didn't seem to cut out/no ignition lights came on.

So now, I am minded to not drive the car again (once I get home tonight) until I can definitely get it booked in with Bagnals. I previously emailed them with the codes i got out of the car using Op-Com before, but I did not hear back from them. So time for a phone call, and get it booked in, because something is not right and possibly deteriorating........ just hope it can make the journey into the middle of Birmingham when the time comes

[Steve McF]

5pm on the same day. Got back to the car - SiD saying traction control fault immediately (instead of OK) and the car won't start.

Now waiting for the AA.......

[sgould]

Ouch!

Sounds like a CIM fault.  Does anything happen when you insert the key?  Steering lock release?

How's the battery voltage?

[aerojon]

Doesn't start or doesn't turn over...which is it,there NOT the same thing..
I'd be looking at the abs/tc module..

[Steve McF]

Yes steering lock did release each time. Battery voltage was around 12.5V before cranking, and the battery is only about 3 months old.

Initially the car did turn over for a second or so, and then the traction control fault appeared on the SiD, cranking stopped, and there was a buzzing from behind the drivers side dash. After this when I tried to start it, instead of Check OK, the SiD immediately started showing the fault, car would not turn over, and the buzzing was still there.

I tried to start the car several times whilst waiting for the AA man and each time it was the same - immediate fault, no turning over, and the buzzing from the dash.

Then 5 minutes before the AA man arrived, I tried it again.....Check OK, and the car started, no fault lights!!! When he arrived, it again started with no problem. He did a diagnostic scan and got the code U2105. He had a look around the wiring and couldn't see anything, apart from he peeled some sleeving back at a harness junction on the passenger side of the engine, and found what appears to be a repair to one of the wires contained within. I'll try and get a pic when I can.

Otherwise car was running as normal. So he followed me home to make sure all was well, and I got home with no faults!!!!

So no further forward, but have quite a lot of symptom descriptions and fault codes to get investigated......

[sgould]

There are various sub codes to U2105.  All related to computer bus problems. 

Full list of codes here https://saabwisonline.com/9-3-9440/2006/dtcs/#miu

U2105 ** appears in the TCS section and others.

[Steve McF]

Harness with 'repaired' wires.....

[Steve McF]

More.....

[Steve McF]

And again....

[aerojon]

Nothing to do with the TC,that's the ionization module wiring..

[Steve McF]

Ah OK.....red herring then? 

[Audax]

Sounds like a CIM fault.  Does anything happen when you insert the key?  Steering lock release?

CIM fault would be my best guess too.

[aerojon]

Guessing!!,IMO=£££££££££££££

[Audax]

Guessing!!,IMO=£££££££££££££

Don't think anyone is suggesting repairing based on a guess and you'd need Tech-2 to go any further, but given the U2105 fault code and the symptoms CIM is the best guess I can make without having the car in front of me.

[Steve McF]

Can a CIM module be repaired, or are new ones /refurbed ones available (if it is the CIM)?

I need to get the car to the specialisr, armed with the fault codes and symptoms  I have in this thread. Given that the car is not guaranteed to exhibit the issues whilst with the specialist, should they be still able to investigate?

Fraser checked all the sensors and wiring last time, but as the car was functioning ok, he found no cause.