DSC light on and ABS light on too....

[amebb]

Hi, can anyone please help me with this issue?

I have a e39 540i. A few weeks ago I replaced all the brake discs, disc pads etc.
I also removed the calipers and replaced the pistons and seals.

Everything g has been put back together as it should be.

My issue is.... I have bleed the brakes using the pressure bleeder as well as normal method, still the brakes feel not so solid.

If the battery is disconnected for a few hours only the DSC light is on.

All speed sensors have been checked and are showing the correct resistance etc.

Can anyone please tell me what else I need to look at and try?

Thank you

[Chedley]

When you did the brake job, did you replace the ABS sensor ?

Do you have access to a BMW software that can reset DSC/ABS error codes (such as INPA ?)

[BimmrMeUpSnotty]

When you bled the brakes, did air get into the ABS box? If so, you have to work the solenoids to bleed the box properly.

[amebb]

Hi, when I did work to the brakes I did not replace any sensors. Using a multimeter the resistance was correct.

I just received the INPA software today with the USB adaptor and will let you know tomorrow what the results are.

Thank you

[amebb]

Hi BimmrMeUpSnotty,

I am sure there was no air that went upto the ABS Unit. But, I cannot be certain. Lets say there was air in the pump, how can I remove it?
When you the solenoids have to be worked, how do I do that?

Thank you

[Chedley]

So, after correctly installing and configuring INPA, you can turn-off those pesky ABS/DSC error lights.

(Load Tool32, Open group file DSC57.PRG, then double click "test_lenkwinkel" in the jobs list)
(See:

https://www.bimmerfest.com/forums/sh...d.php?t=890659)

[amebb]

Hi Chedley, I will try that tomorrow. Fingers crossed it will work out.
The inky way I managed to switch off the ABS light was through disconnecting the battery for a few hours. Then once reconnected no ABS light. But, the light came back soon....

Wish me luck lol

[amebb]

UPDATE

I had the local garage check my car using a snap on code reader etc.

This is what the results are:

snap on error code ---------- issue

14 ----------- ABS Valve Relay
40 ----------- Pre Throttle Potentiometer
6 ------------Wheel Speed Signal Fronr Right

So, tomorrow i will replace the wheel sensor, i have a new one.
For the ABS Valve Relay - is that the pnk relay next to the ECU with other relays or does the ABS unit have an internal relay built in etc ...??

Thank you - any clues much appreciated