Yes just as i thought you need a scan tool to bleed this system .
If you don't have a scan tool try the following bleed sequence ,
Start rear right , Front Left .
Rear left , front right .
May help but you will need to get to a brake shop or the dealer for the scan tool to bleed the ABS system.
One trick that we used to do is bleed the system as said, then on a very sandy road do a few hard brakes on the road so the brakes lock up and activate the ABS this helps bleed the ABS system then bleed again manually .
We did this many years ago on fords before we got the ABS bleed system on our scan tools may work if not make an appointment with the dealer .
Hope this help and if you Need further assistance with this issue then please get back to me with the reply box below .
After rating there is no further cost for any other question relating this issue .
Kind regards Greg