3 Orange dash lights
- Thread starter PAH
- Start date
Jfgoldfish
Active member
I would start with the wheel speed sensors.
Worth pulling them out and giving them a clean. It is often just metallic dust from the pads and discs that interferes with them.
Worth pulling them out and giving them a clean. It is often just metallic dust from the pads and discs that interferes with them.
Jfgoldfish
Active member
PAH said:
It will need reprogramming but not necessarily by BMW. Any competent indy or shade-tree mechanic with INPA, winfkp, ect can reprogram the DSC module to the car.
I think the turnaround time for sending in your own unit is quite good. That might be the best option.
Jfgoldfish
Active member
ph001 said:
Good point, I think mine did light up the TPMS light when the speed sensor was dirty.
IMO it is the ABS pump.
(Compare with the description I put up some time ago as I have had both ABS pump and steering angle faults
ABS / DSC Vs Steering Angle faults - https://z4-forum.com/forum/viewtopic.php?f=3&t=121145)
The fault codes should lead you to a sticking pump motor 5DF0- a known fault - brushes expand and stick so pump motor stops working , yes you can send it away for £250 or you can repair it yourself by replacing the jammed brushes which is the identified cause.
Brushes from Ebay.
I had to use INPA to bleed the pump and DSC unit after being fully drained.
I am near Chepstow if thats any good and you want to talk - I used ICARSOFT for initial diagnostics which also checks the wheel speed sensors.
The Brush and bearing repair kit was about £30 if I recall correctly
good luck.
A Pump repair / replacement does not need reprogramming.
The DSC/ABS computer from new or another car will need reprogramming.
(Compare with the description I put up some time ago as I have had both ABS pump and steering angle faults
ABS / DSC Vs Steering Angle faults - https://z4-forum.com/forum/viewtopic.php?f=3&t=121145)
The fault codes should lead you to a sticking pump motor 5DF0- a known fault - brushes expand and stick so pump motor stops working , yes you can send it away for £250 or you can repair it yourself by replacing the jammed brushes which is the identified cause.
Brushes from Ebay.
I had to use INPA to bleed the pump and DSC unit after being fully drained.
I am near Chepstow if thats any good and you want to talk - I used ICARSOFT for initial diagnostics which also checks the wheel speed sensors.
The Brush and bearing repair kit was about £30 if I recall correctly
good luck.
A Pump repair / replacement does not need reprogramming.
The DSC/ABS computer from new or another car will need reprogramming.
Anyone done this? How hard to bleed the system?
You could always use INPA software to carry out the brake bleed which activates the ABS pump for a few seconds - this would prove if your pump works.
Post replacing the pump brushesI and running the motor on the bench and full reassembly I found that I could not bleed the brakes properly once the ABS /DSC was reinstalled so had to use INPA bleed program to activate the pump bleeding cycle
Its not hard but you just need someone to sit in the car activating the pump and pressing the pedal while someone else bleeds at the wheels.
I tried Vacuum bleeding and pressure bleeding but only got about 75% brake efficiency = soft pedal , whereas operating the pump whilst bleeding made the brakes pedal much more solid.
I feel the task was daunting rather than difficult but I was an engineer by trade - the problem I now have is having to plug the car into a laptop anytime these bloody lights come on. I would rather not have ABS / DSC wheel sensors, g measurement , electric steering in the first place!
but guess we all have to move with the times.
You could always use INPA software to carry out the brake bleed which activates the ABS pump for a few seconds - this would prove if your pump works.
Post replacing the pump brushesI and running the motor on the bench and full reassembly I found that I could not bleed the brakes properly once the ABS /DSC was reinstalled so had to use INPA bleed program to activate the pump bleeding cycle
Its not hard but you just need someone to sit in the car activating the pump and pressing the pedal while someone else bleeds at the wheels.
I tried Vacuum bleeding and pressure bleeding but only got about 75% brake efficiency = soft pedal , whereas operating the pump whilst bleeding made the brakes pedal much more solid.
I feel the task was daunting rather than difficult but I was an engineer by trade - the problem I now have is having to plug the car into a laptop anytime these bloody lights come on. I would rather not have ABS / DSC wheel sensors, g measurement , electric steering in the first place!
but guess we all have to move with the times.