Z3M ABS issue

[Z3Mroadster]

Hello!

My ABS not working...

Error code 20:

ABS valve inlet front right


I was testing wheel sensors-all about 1000 ohm...

How test Abs pump solenoids resistance from switch?
I was only testing wheel sensors-all about 1000 ohm...

There are one red and one brown wire from ABS pump motor and 8 blue wires(i mean from ABS solenoids)...



Car is euro Z3M-S50B32

1997.

 

[NZ00Z3]

The fault code sounds like it is a stuck valve in the ABS hydro block.

 

[Z3Mroadster]

Thanks mate!

Is okay try activate ABS pump motor with 12V when I disconnect ABS plug?
There are one red and one brown wire...

And 7-8 blue wires...

Also I noticed the brake pedal catch lower than usual...Sometimes brakes
immediately when I touch brake pedal...
Brake fluid is new...

 

[NZ00Z3]

I don't recommend playing with 12V DC and the wiring unless you know what you are doing.

 

[Z3Mroadster]

I mean switch on the pump only a few seconds?

 

[Z3Mroadster]

Problem is ABS solenoids...
ABS pump motor is okay(I am check with battery)...


How to fix.?

 

[Althulas]

I don’t know if this thread might be of use
http://m3forum.net/m3forum/showthread.php?t=145202

And also the 9th post in this thread might be useful. https://www.bimmerforums.com/forum/showthread.php?125355-ABS-Pump-Throw-away-part-or-rebuild

But I would try as Murray Wall suggested above or buy your own software and lead and activate the abs pump. I would also search on YouTube and look at a few vids to see if you can find any leads on there

View: https://youtu.be/MgozbbeT28Q

 

[NZ00Z3]

If you are playing with wires then I suggest that you get a copy of the wiring diagrams for your car. Read the first page to ensure that they cover the build date of your car. Link below.
http://wedophones.com/BMWManualsLead.htm

The front right has two (2) valves, an inlet and an outlet. The error code does not differentiate between them, so you'll need to check both.

Use an ohm meter to see if there is any major resistance difference (say, +/- 20%) between all the valves. This will tell you if the valve solenoid/coil is the fault e.g. High reading = lost its magnetic suck to work the valve plunger. Low reading = burnt out.

If you are using 12V DC, ensure that the supply is properly fused, so if there is a fault you don't get more smoke and flames than needed. Carefully apply the voltage to the connectors identified from the wiring diagrams and see if there is an audible click from the valve working.

Hope this helps

Murray

 

[Z3Mroadster]

Thanks guys

Vacuum lines is not potential problem?

My brake pedal sometimes catch lower than usual...

 

[Z3Mroadster]

Sorted!

I was put other ABS pump and ABS working!

Thanks!