ABS Prelude BB3

Hello I’ve been having a problem with the ABS from my BB3 for some time now. The lamp started at some point and since then my ABS is inoperable. I then measured all the sensors (for safety 2 times)… The rear two had a resistance value of 0.9 k-Ohm, the front left 1.2 k-Ohm and the front right was about 9 k-Ohm. I then assumed that this is defective, ordered a new one and when I wanted to install it again all measured. But then all 4 sensors had a resistance value between 0.9 and 1.2 k-Ohm, so all in the green area. My next guess would be the control unit… Has anyone had the problem already and can help me further? Thank you already in advance.