My problem is with the ABS system, the ABS light is NOT on, but I check the status jump the 8 and 13 pin on DLC, the ABS light flash, it's flash give me this codes, 18, 12 and 81. The 81 is about the ABS unit, and in this treat talks about it, I think that I have to replace the ABS unit, but I still don't know what mean the 18 and 12 code.