Parking Brake Service Mode - ProTool

javis20 · Post by **javis20** » Sun Dec 17, 2023 4:03 pm

Just a heads up, ProTool can retract E89 parking brake actuator into service position via expert mode.

Per BimmerGeeks.

"Under the Functions menu, hit the Expert Functions

You have two jobs in there that handle this process:

STEUERN_MONTAGEMODE_AKTIVIEREN -> Activate Assembly Mode
STEUERN_MONTAGEMODE_DEAKTIVIEREN -> Deactivate Assembly Mode

Find those jobs in the expert functions, tap on them execute the jobs and then it will do what you need it to do for the service. We will get it added in for your specific module as well."

B21 · Post by **B21** » Sun Dec 17, 2023 4:50 pm

What you mustn’t do is ..after doing the service activate the parking brake with the caliper off the disc..otherwise..as I found out is the sounds of two pistons tinkling on the ground..

enuff_zed · Post by **enuff_zed** » Sun Dec 17, 2023 5:04 pm

B21 wrote: ↑Sun Dec 17, 2023 4:50 pm What you mustn’t do is ..after doing the service activate the parking brake with the caliper off the disc..otherwise..as I found out is the sounds of two pistons tinkling on the ground..

Googled infallible and neither of our names appeared.

But it has to be the very best way to learn stuff.

B21 · Post by **B21** » Sun Dec 17, 2023 5:22 pm

enuff_zed wrote: ↑Sun Dec 17, 2023 5:04 pm
B21 wrote: ↑Sun Dec 17, 2023 4:50 pm What you mustn’t do is ..after doing the service activate the parking brake with the caliper off the disc..otherwise..as I found out is the sounds of two pistons tinkling on the ground..

Googled infallible and neither of our names appeared.
But it has to be the very best way to learn stuff.

The great thing about these BMWs are there are so many ways to f@&k things up…

javis20 · Post by **javis20** » Sun Dec 17, 2023 7:01 pm

Absolutely!

flybobbie · Post by **flybobbie** » Sun Dec 17, 2023 9:42 pm

I would take off the ebrake motors and wind out manually..
Both of my car ebrakes have had water leak in and fail them.
Good opportunity to inspect and put some grease around the seals on refitting.

: brake1.jpg (87.16 KiB) Viewed 365 times

Water enters through the shaft and corrodes the insides.
OBD was voltage problem on ebrake.

: 20220430_184426.jpg (203.5 KiB) Viewed 362 times

flybobbie · Post by **flybobbie** » Mon Dec 18, 2023 9:37 am

In fact the emotors are cheap 25-30 quid, i would replace if approaching 100k miles.
obd counts how many times they have been applied.

: 20220430_184812.jpg (180.11 KiB) Viewed 332 times

Bottom line should say right.
You can see the right failing over time to apply.

The new motors i packed with grease before fitting.

RobbiZ4 · Post by **RobbiZ4** » Wed Dec 20, 2023 9:31 am

flybobbie wrote: ↑Sun Dec 17, 2023 9:42 pm Both of my car ebrakes have had water leak in a fail them.

20231220_092648.jpg (88.54 KiB) Viewed 288 times

Exactly this is what happened to another Z4 some days before.

The story:
https://www-zroadster-com.translate.goo ... st-3615462

This tiny green PCB had massive corrosion on one of it's two pins and threw a fault code. No hint in the fault code, which side had been damaged!

flybobbie · Post by **flybobbie** » Sun Dec 24, 2023 7:02 pm

I packed the new motors with a little grease before fitting.

Z4-forum.com

Z4-forum.com