C1364, 225 and C1365 After ABS Pump Replacement

When the buzzer is sounding and the trouble codes are activated the pedal feels soft and the brakes are much harder to engage. When I clear the codes the pedal feels normal and the brakes work fine, until I turn the car off which immediately causes the buzzer to come back on and brakes to stop working well.

I’ll check the accumulator pressure this weekend on tech stream.

thanks

 

Hi

Not sure exactly where to find the accumulator pressure on techstream. I just looked at the screenshots and I see the "target oil pressure" for each wheel cylinder data on the freeze frame table for code C1364. Those are all showing 0 MPa. I don't see accumulator pressure in the live data table.

When the trouble codes are set and the buzzer is buzzing the pedal feels soft and the brakes are very hard to engage. When I clear the codes the brakes feel normal and work normally, but as soon as I turn the car off I hear the buzzer return and the brakes go soft.

I bled the read brakes as you describe, but I didn't get much flow out of the back brakes. When I used a vacuum assist on the back brakes I was able to get some fluid to flow. I could hear the pump running while bleeding the back brakes, but it would run for a while then stop.

Thanks

 

I decided that I must have gotten a bad used ABS module, and replaced it with another used unit this weekend. This one appears to be working and I now have normal brakes and no warning lights. Hopefully this one will last a few more years. Thanks for the all the help.