Rear brake job causes ABS error codes.....WTF?
03-02-2004, 04:18 AM
#1
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Rear brake job causes ABS error codes.....WTF?
My buddy did a rear brake job on his FWD A4, and right afterwards, the ABS light came on. He brought it over and we VAGed it, a rear right ABS sensor code came up. I pulled the sensor, cleaned it, and put it back in. 1 mile later, the ABS light came back on, this time it was a rear left ABS sensor code. Pulled the sensor,cleaned it, replaced it, still a rear left ABS sensor code.
Any idea what's going on here?
Any idea what's going on here?
03-02-2004, 05:06 AM
#2
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From old Coupe experience, sensor placement is critical
I don't know the details of the ABS sensor installation on the A4 (FWD or Quattro), but remember a similar problem on my old Audi Coupe. Sensor had to be placed a fixed distance from the disc/hub - too far or too close and the ABS would not work.
03-02-2004, 06:42 AM
#5
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Help me out, what is the sensor ring??
I took the wheel off to inspect the brake job, and pulled the sensor out to see if I could identify what the problem was. There was no ring that I saw...is this a washer of some sort between the hub and the sensor?
03-02-2004, 08:20 AM
#7
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It's a large ring ~5" diameter.
It mounts on the inner side of the brake rotor, and has has a series of slots all the way around the ring. Maybe a hundred or so slots.
It gets removed from the old rotor, and slightly tapped onto the new rotor.
Without it, you'll instantly get an error.
It gets removed from the old rotor, and slightly tapped onto the new rotor.
Without it, you'll instantly get an error.
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