Anti Skid Message Fault Code BCM108 and BCM109
 

Morning all,

I have an anti skid message (sorry I can’t remember what it was but will report back when I get home).

Symptoms are starting vehicle and driving down the road. Take a strong turn and then the error comes up.

Now it’s on constantly from start.

I have the following messages from VIDA. (Both codes are red).

BCM108 communication between control units communicational problem with SAS, control module not initiated.

BCM109 communication between control units communicational problem with SAS, control module internal fault.

I assume this is the steering angle sensor (clock spring on the steering column).

The replacement part is expensive if I get it wrong, is there anything else it could be?

I also have the following amber codes (as they are amber I assume these are of little concern).

BCM103 pedal position sensor faulty signal.
SAS0007 control module internal fault
SAS000E steering wheel angle sensor internal fault.

I have a squeaking sound from the column when turning and had been Googling how to lubricator column. It aoubds like a well worn rubber bushing is squeezing when turning the wheel.

As I say, if it were an £80 part I would replace the steering angle sensor however at £400 I would prefer to have a good idea/confirmation.

Very grateful for any input you guys would have!

Thanks so much!

Use the data capture on VIDA to check the SAS angle as you go from lock to lock. If it's jumping around instead of smoothly moving from -360-360 you have issues (probably dust on the optical sensors). If it is jumping in steps you have issues with the fine gear sensor. They can also go 180 degrees out, but you don't have that. They can be cleaned - check previous posts.
Damien

That is very good advice, thank you for that! I would hate to replace on the chance that it could be repaired!

Thank you!

Thanks for the advice above. To close this out and for future reference.

My BCM showed red with ‘communication error’. My SAS showed amber with internal fault.

Knowing kind of what to expect I took it to my local mechanic who replaced the SAS.

It is my understanding, which I do not state as fact, that you can align the new sensor with the old one. However, Volvo say it should be calibrated. For these reasons I paid for my local mechanic to do.

It was the SAS in the end and now the car runs well.