: bleedings ABS system

05-26-05, 12:45 PM
I heard that vehicles with ABS, the ABS pump must be bled out to remove any air, failure to do so could cause a brake failure if the ABS is applied, because the ABS pump has air in it and it is the only thing that is stopping the vehicle??? :confused: That sound right?

My neighbor is reluctant to do the front brakes, I assume because of this reason. In the factory service manual, on page 5-14, it shows the "Brake pressure hydraulic modulat valve assembly", is that the ABS pump???

Please advise, thank you.

05-26-05, 02:45 PM
If you bleed the brakes by attaching a pump to the master cylinder and pumping and then bleeding each individual wheel the whole system will be free of air.

05-26-05, 02:57 PM
I agree. and I'll tell you that I just changed the calipers, pads and rotors on my STS which has 4 wheel ABS and I bleed the lines using the standard method of one person pumping the pedal while the other opens the bleeder valve.

Everything works fine and I have no problems. I do think pumping the air out with a bleeder gun is the best way.