ABS system funktion test "Not starting"
 

Hi Audi owners

For the last months I have ben dealing with ABS and ESP problems. It accrued after I replaced the wheel baring and damaged the speed sensor. So after replacing the broken speed sensor dose the ABS and ESP lights glow. After reading the malfunction codes from the ECU with too scan tools, a Autel MaxiSys MS908S Pro and a Hex-net/vcds OBD reader, I get 01486, it says that the system function test Is activated. And that is correct, I tried to carry out a ABS system function test but I would not engage when I press the brake pedal down at a pressure of 45 bar. https://www.audiworld.com/forums/ima...lies/frown.gif

Are there any Audi owners that knows what there is wrong?


PS. The car in question are a Audi A4 B8 from 2010


Best regards Jens

What address is that DTC being reported from? Another thread said it might be possible to reset the test state by pulling the fuse for that module for 5 minutes.
Should be address 3, ABS controller (J104). Ross-Tech page reports no other DTCs should be present on the car, at least not in steering or any power related DTCs.
Looks like there's three different fuses for the J104, all in the left end of the dash.

Did you consider skipping the part where you need the lights to change and just finish out the rest of the test to see if it would adapt?
ESP System Function Test - Ross-Tech Wiki

Also, I don't know if there is, but is there a measuring block or advanced measuring value you can look at to see if the brake pedal travel is being acknowledged?
"Brake Pressure Sensor (G201) Plausibility will be confirmed by a Change in the Brake Electronics Warning Lights." Ok, so that didn't seem to activate during your test. Is there an independent means to test that event?