Thanks for all the replies.
Unfortunately, the problem persists. Now, though, I am almost completely certain it is all about signal strength.
The wheel hub assemblies were replaced in the front. And they were torqued to 320 Nm, according to specification
New reluctor rings gave no improvement.
By rotating the sensors inside their mounting hole on the steering knuckle, and thus varying the signal strength for some reason, I have found that at what speed ABS is activated seems directly proportional. "Sweet spot" leads to the ABS activating just before coming to a stop, at perhaps 5 km/h. The closer I rotate the sensors back to their original position, the higher the speed at which ABS starts intervening. And with the sensors in their original position, ABS-light also comes on.
Note that front left and front right sensor seem to perform identically.
So my reflections right now are:
- Could the signal be weak due to bad connection to ground?
- Do front left and front right wheel speed sensors share ground?
- Why would this problem arise after replacing front suspension along with new sensors?
This is the only ground I've found under the hood. Can someone confirm if this could be where the sensors ground?:
I guess my next step will be to check wiring, and I'll also test supplying a new temporary ground.