abs troubleshooting

Hey all.. I have searched and searched and haven't been able to see if anyone has the same issue as me. 1998 gxl 105 1fz aus delivered auto I have c1256 Replaced pump motor, accumulator and done a rebuild on the master cylinder Still beeping still next to no brakes still bringing up c1256...

I replaced front calipers, pads and rotors and a brake line on the right front. I replaced pads and rotors in the rear. I went to bleed the system and couldn't get rid of the air. Started in the right rear, left rear, LSPV, couldn't get any of them to bleed without air. I blocked off the...