mazza brakes 3 2007

Greetings Friends I started with the problem of spongy pedal I sent to the workshop and they told me to change the bomb, change it and really I did not feel deferred, read in forums that this is the problem of the ABS module, that still does not change it, but the problem is that I began to bleed the jaws and the front are very good but the rear does not arrive. To the jaws and if the liquid arrives without news, I check pipes from the pump to the ABS and if there is liquid in the two shots that enter the ABS module, now it is not supposed that the jaws should work as a liquid is worth the ABS or not the ABS, or I am wrong if they can help me I would thank you very much