I have noticed the stability control light blinking on my car at two different situations.
One situation is when steering on an icy road. In this case, I do not hear the sound from the ABS. In fact, the only way I could know that I'm driving near the limits was the light blinking!
However, I have also noticed that the stability control light blinks when braking hard on an icy road, so hard that the ABS starts to operate. In this case, I very clearly hear the sound from the ABS. To make it clear, I wasn't steering the car at all in this case, just braking hard.
I have understood that ABS and stability control systems are separate from each other. Now, why does the light blink when driving straight and braking? Does the light mean that the car is doing something else than operating the ABS as well? Or is the light connected so that merely the ABS operating will also cause the light to blink? In my opinion, if the light is connected in this way, it is unnecessary, as you anyway hear and feel the ABS operating from the sound and from the brake pedal. On the other hand, stability control operation cannot be heard or felt in any way, so the stability control light clearly has an important role.
The car is a 2016 Toyota RAV4 hybrid.