Low brake fluid level message

Rod Diagnostician California Posted   Latest   Edited  
Unsolved
Braking
Electrical
2018 Audi A3 Quattro Premium 2.0L (CNTC) 6-spd (0D9)

Low brake fluid message , fluid is full.

looking for voltage specs for fluid level sensor for diagnostic purpose 

pin 1 brn/blu

pin 2 grn/blk

both wires go to vescm from there data bus communicates.

thank you

0
Charles Technician
California
Charles
 

Your brown blue is your sensor ground, it shares a common splice location with your windshield washer level sensor, coolant level and outside air temp sensor. Your green black is the 5 volt signal from the J519. The area under the booster is prime rodent damage area on that vehicle.

+2
Ð Awarded
Agree
Helpful
Rod Diagnostician
California
Rod
 

thank you

0
Ð Awarded
Rod Diagnostician
California
Rod
 

Solved ,brown blue was broken inside insulation about 6 inches from connector. did not have 5 volts on green black , had 2 volts. Repaired the broken brown blue and no more low fluid message.

+1
Ð Awarded
Helpful
Glenn Owner/Technician
Texas
Glenn
 

Have you tried tapping on the brake reservoir to free up the sensor level magnet? They do get stuck when the fluid gets too low. People add fluid and expect it to automatically read correct. It has to be tapped to rest the magnetic float

0
Ð Awarded
Rod Diagnostician
California
Rod
 

I want to get readings before disturbing the component , for documentation . Thanks for replying.

0
Ð Awarded