[Hanuman]

Turn the ignition on, and the light should go out/stay off. If it comes on there's likely a fault in the ABS system. where though?
If its anything like the earlier system, there is a combination relay which requires a number of things to be present or correct. any single fault results in the light coming on.
It requires a healthy power supply, a healthy power supply sense, ABS switch not pressed.

With the light off, if you start driving and the ABS light comes on, this usually points to a fault with one or more ABS sensors or drive shafts. The ABS is comparing the signal from each of the sensors, and if one of these is giving a poor signal, no signal, or something very different from the others, the ABS turns off; better to have normal brakes than haphazard ABS function.
problems frequently occur with corrosion on the drive shaft toothed ring, rather than the sensor. But its just as possible that the sensors may not be properly position following suspension work.


There are some notes on the subject going back over the years, so worth a search