ABS Booster reman replacement

[BrynndianaJones]

Hey guys + girls, I have a 2005 LX470 that had the original brake booster pump start failing. I replaced it with a remanned one (didnt dave the original as I didn't realize people rebuilt them domestically) and ever since then I have gotten the below codes (for about a year now).

My brakes and ABS system seems to be working from physical tests, but the computer is giving conflicting data. If I was to hook my vehicle into techstream, is there a way to fix these trouble codes? I suspect the reman ABS Booster is just causing some code issues. Any master techs out there able to offer any insight or guidance?

TIA

 

[Brandon Ryder]

Reading about these codes, they may all be related. Either the pressure sensor itself is bad, or the MC isn't producing the pressure necessary and throwing the pressure code. The other codes indicate the ecm is disabling the traction and stability control, which both use the ABS system to control wheel speed.

Just my guess though. Good luck.

 

[OEMGUY0720]

This typically happens if there's too much air in the line vs brake fluid / the pressure sensor detected there was not enough fluid. The pump basically initiated but it ran too long to detect it is not getting the factory programed threshold pressure.

 

[BrynndianaJones]

Reading about these codes, they may all be related. Either the pressure sensor itself is bad, or the MC isn't producing the pressure necessary and throwing the pressure code. The other codes indicate the ecm is disabling the traction and stability control, which both use the ABS system to control wheel speed.

Just my guess though. Good luck.

Thanks the response! I will look into that.

 

[BrynndianaJones]

This typically happens if there's too much air in the line vs brake fluid / the pressure sensor detected there was not enough fluid. The pump basically initiated but it ran too long to detect it is not getting the factory programed threshold pressure.

Thank you for the response. I am just getting new rotors and pads so will see if another brake bleed will fix the issue. If not, I will look into the master cylinder as mentioned above.

 

[TequilaMechanic]

I would look at the FMS and search the codes you have in the troubleshooting section. Also there are instructions on how to bleed in a new booster assembly that shoots out a lot of liquid/air, maybe that’ll help with things. I did mine per the manual after a replacement and conventional bleed and I do think it makes a difference.