Brakes Pulsing/Grinding Only at Speeds <30MPH?

[theshadow92]

Title says it all. No codes stored in the DSC module. Did a search and checked all the usual culprits. What gives? Thanks in advance!

1999 740iL

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[Timm]

That's nearly always a failing ABS sensor - it is giving an intermittent signal - have a go at reading the live wheel-speed data to confirm

[theshadow92]

Since the car is a 1999 model, the 20 pin connector underneath the hood has to be used to monitor the wheel speed sensors which made it very difficult to monitor the sensors. A buddy and I were able to test them up to speeds of ~5 MPH (hood had to stay open) and they were fine.

How else should we test them?


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[theshadow92]

Bump. Anyone?


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[asianvenom]

Bump. Anyone?

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You can jack up the car and spin the wheel, you don't have to drive it.

[theshadow92]

You can jack up the car and spin the wheel, you don't have to drive it.

Genius. What kind of live data errors should I be looking for? I'm monitoring the live speed sensor data using INPA.


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[asianvenom]

Genius. What kind of live data errors should I be looking for? I'm monitoring the live speed sensor data using INPA.

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Can't help you there, but I did this to trouble shoot bad sensor, using inpa as well.

[Timm]

Any history, did this start all of a sudden or was some mechanical work done that caused it?