chasing the anti skid gremlin

[SuperHerman]

Yes that is the point. Yes you are assuming it is bad and not connecting that is why you replaced it - if you disconnect it and get other codes then that may mean it was working and you should look elsewhere or at least at some of the connection pins. It is a free and quick test which should cause no harm - maybe it will help. Like you say - you are "chasing".

[ylwgto]

Been a while, but I still have the Anti-skid dash error code.

While doing my brakes I discovered that the rear wheels spun freely and independently when jacked up (car in park, off, one rear wheel off ground at a time). Does this mean the AWD is disengaged and if so how do I determine if it is a mechanical or an electrical sensor issue?

Again, 2004 XC90 2.3T with 189K. I've replaced SAS, yaw sensor, TCM, ignition module. Recalibrated DSTC system with my computer. BUT, the computer still states that it cannot connect with the system when trying to pull SAS codes.

Now that I know that the AWD may be compromised, I am more inclined to search for a fix.

what next?

[KLR142]

Just seeing this as I'm not normally on here, but you may be causing yourself a ton of headache by not using VIDA to scan your car. Your scan tool MAY not be able to communicate just because it can't communicate with the SAS, not necessarily because the car has a problem. Get VIDA and you will be able to fault trace and calibrate for real. It's not hard to repair these systems and their anti-skid warnings, but it can be expensive. You need to use VIDA to see what's actually going on and repair it. The steering angle sensor(clock spring!) is very often a problem. So is the active yaw sensor like you found because of sunroof drain issues.

Did you check to see if your accelerometer fault went away after you replaced the yaw sensor?

Regarding your all wheel drive, there are many possible problems. One way to determine if it's mechanical or electrical is grab the propshaft under the car. If you can spin it without spinning the front wheels, your angle gear and coupler are stripped and it's at LEAST a mechanical issue.

Good luck!

[ylwgto]

thanks
sold the car and bought an '09 XC90 3.2 R type. saga over!