Trifecta ABS/TC/Brake [Help?]

[Winnn]

Car: 2009 E93 M3 (UK)

Long story short, I did something dumb today: I installed a symphony ambient lights kit on the door panels, in place of the original lights. I left all connections intact, to avoid error codes and instead drew power from the lighter via independent cables to the front left (passenger), and both rear sides. - for these to work with car lights on automatic (as otherwise they wouldn't receive 12v during the day and they would be off). I've run the cable of the front right door through the door mesh, next to the OEM cables "bus/pin" connector, without disconnecting anything.

That being said, everything was fine until I drove off. I then got a persistent trifecta in the dash (ABS/TC/Brake). I tried clearing the codes with Bimmerlink initially, they clear successfully and then come back.

I then tried to use INPA to read all memory and clear the codes that way -> same issue -> codes get cleared, I drive away, same errors pop-up.

I opened the front right panel, footwell, as well as the driver's side footwell to check for any loose connectors, without luck.

The error codes that I am getting are: DSC (5D93) and EDC (5FF1, 5FF8).

I then checked the modules and the front-left speed sensor is not working. On the DSC sensors however, while all others are fine, I see a -5.19 "offset steering angle [grad] (-5 to 5 range) that shows up as red; but that never caused an issue before and I didn't fiddle with the steering wheel. Temperatures and voltages are fine.

Later Edit: Hooked up ISTA+ and am getting the same issues. Front-left speed sensor not working (tried to drive and measure and returns 0).


I did notice a strange behaviour of the left side ambient lights. They turned off and on for a brief time while running INPA. Possibly connected to the issue.

Also worth noting that I did not have these codes before. I did take the wheels off and put them back on recently, but I've been driving for a week without any issues, so I wouldn't think it's related. Too much of a coincidence for this to happen right after I drew power to those lights.

I am lost and was hoping that anyone here might know what the issue could be / what else I could try.


Could it be that this is just an insane coincidence and that my left ABS sensor is bust? Thoughts? Thank you

[RocketyMan]

Originally Posted by Winnn

Car: 2009 E93 M3 (UK)

Long story short, I did something dumb today: I installed a symphony ambient lights kit on the door panels, in place of the original lights. I left all connections intact, to avoid error codes and instead drew power from the lighter via independent cables to the front left (passenger), and both rear sides. - for these to work with car lights on automatic (as otherwise they wouldn't receive 12v during the day and they would be off). I've run the cable of the front right door through the door mesh, next to the OEM cables "bus/pin" connector, without disconnecting anything.

That being said, everything was fine until I drove off. I then got a persistent trifecta in the dash (ABS/TC/Brake). I tried clearing the codes with Bimmerlink initially, they clear successfully and then come back.

I then tried to use INPA to read all memory and clear the codes that way -> same issue -> codes get cleared, I drive away, same errors pop-up.

I opened the front right panel, footwell, as well as the driver's side footwell to check for any loose connectors, without luck.

The error codes that I am getting are: DSC (5D93) and EDC (5FF1, 5FF8).

I then checked the modules and the front-left speed sensor is not working. On the DSC sensors however, while all others are fine, I see a -5.19 "offset steering angle [grad] (-5 to 5 range) that shows up as red; but that never caused an issue before and I didn't fiddle with the steering wheel. Temperatures and voltages are fine.

Later Edit: Hooked up ISTA+ and am getting the same issues. Front-left speed sensor not working (tried to drive and measure and returns 0).


I did notice a strange behaviour of the left side ambient lights. They turned off and on for a brief time while running INPA. Possibly connected to the issue.

Also worth noting that I did not have these codes before. I did take the wheels off and put them back on recently, but I've been driving for a week without any issues, so I wouldn't think it's related. Too much of a coincidence for this to happen right after I drew power to those lights.

I am lost and was hoping that anyone here might know what the issue could be / what else I could try.


Could it be that this is just an insane coincidence and that my left ABS sensor is bust? Thoughts? Thank you

You don't need to drive your vehicle around to confirm wheel speeds. Just simply jack the vehicle up and spin the wheel by hand--not a problem. Then use ISTA or INPA and review the DSC module inputs.

As a side note, when you are running ISTA, there are background operations that continue to run which might cycle certain modules. For instance, the FRM could possibly be doing something, thus, exterior lights might make a blip.

Maybe disconnect every modification you did and see if you get functionality back.

Lettuce know!

[M3SQRD]

Originally Posted by RocketyMan

Lettuce know!

I was hungry for a hamburger after reading this We’ve all been caught doing something similar in posts and I try to find a way to blame it on autocorrect.

OP - sorry. I can’t think of a way to easily test for each different area. A bad abs wheel speed sensor at multiple corners might do it but how would installing lights cause multiple wheel speed sensors to fail?

[powerbait]

It is quite coincidental, but I've already replaced 3 of the 4 speed sensors and just ticked over 60K miles. If your tool shows a 0 return for wheel speed, there's a good chance it's bad.
I once had some coding done, MDM retrofit, then the next time I took out the car I had a Christmas tree on the dash, ended up being a throttle actuator, completely unrelated but boy did I chase my tail on that one.

[MineralWhiteF80]

If you havent fixed this issue already... I would disconnect your power leads going to your power source of the lights (cigarette lighter), clear fault codes in ISTA, and test for proper operation. You need to confirm you are not experiencing an electrical interference with the new wires running throughout the car. In the same way, my garage doors will not open with any of my car's HomeLinks when my garage LED lights are on; turn the LED lights off and I can open my garage doors from my cars.

If no change, I would swap front left and front right wheel speed sensors and retest to see if fault code moves with the presumed faulty wheel speed sensor.

[RocketyMan]

Originally Posted by MineralWhiteF80

If you havent fixed this issue already... I would disconnect your power leads going to your power source of the lights (cigarette lighter), clear fault codes in ISTA, and test for proper operation. You need to confirm you are not experiencing an electrical interference with the new wires running throughout the car. In the same way, my garage doors will not open with any of my car's HomeLinks when my garage LED lights are on; turn the LED lights off and I can open my garage doors from my cars.

If no change, I would swap front left and front right wheel speed sensors and retest to see if fault code moves with the presumed faulty wheel speed sensor.

Should go without saying. But great steps for OP to report back on once completed.