Hello i have a 2005 bmw 745LI and its saying on the dash ...
Responses
Daniel
251 days ago
Hi. I'm Daniel,
I'll be the mechanic assisting you today.
I'm sorry to hear about the problems you have with your 7 series.
Let's see if we can figure this out and get you back on the road quickly.
What codes are stored in the system if you scan it with a capable diagnostic scanner though the OBD2 port?
As soon as the a warning sign appears on the dash, the system does also store one or several fault codes that give us further indication on what triggered the fault.
Possible cause I can see at this point is the hydro-unit for the DSC. This is the only part I can see that is locking up ALL brakes together at the same time.
Customer
251 days ago
Customer attachment 1/25/2021 1:16:26 PM
Customer
251 days ago
This what i saw when my friend scan the car5EFE pressure sensor offset and 5FOE Yaw rate sensor can error
Daniel
251 days ago
The Yaw rate sensor fault can not cause this.
Good possible that the DSC unit is locking up and this also sets the pressure plausibility code.
The hydro-unit is actually the only part that can cause all 4 brakes to lock up at the same time.
Customer
251 days ago
Is that the abs module ?
Daniel
251 days ago
Yes, the ABS module is attached the hydro-unit and it comes as one piece.
Customer
251 days ago
Ok is there anything i can do to bypass the system until i can buy one ? And also could replacing the master cylinder and brakes booster and repairing the vacuum pump trigger this issue because before i did the repairs i was not getting this issue ?
Daniel
251 days ago
I'm not aware of any measure to bypass the ABS.
However I understood that the issue was present all along and that replacing the master cylinder& brake booster did not solve the issue.
Good possible in this case that the master cylinder is causing this and is maybe not adjusted properly etc.
Why were the parts replaced anyway as they can not cause the warning lights you experience as well?
Customer
251 days ago
No actually the issue i had at first was the brake pedal was hard and it had oil and brake fluid in the brake booster and was not getting sufficient vacuum thats why i replace the parts after i did the job the car drove perfect that night although i had a bad battery that was reading 6.5 volts the next day thats when the problem start happening so i bought a new battery thinking that was the problem.
Daniel
251 days ago
The lockup of the brakes are either caused from the hydraulic-unit that is part of the ABS or either the master cylinder& installation.
I can not see a electrical cause at the moment.
Customer
251 days ago
Ok thanks
Daniel
251 days ago
You are welcome.
Please let me know if I can provide anything else at this point.
Customer
251 days ago
Will do thanks Daniel .
Daniel
251 days ago
You are welcome.
Thanks for using JustAnswer.
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