Audi 80 Quiz
Instruments and Auxiliary Equipment

Brake system warning lamp

In this manual: Instruments and Auxiliary Equipment
Technical Description — 39Engines — 41Exhaust System — 13Cooling System — 28Fuel tank and fuel pump — 12Air Filter and Intake Ducts — 13Mono-Motronic Injection System — 18Digifant Injection System — 19KE-III-Jetronic Injection System — 35MPI and MPFI Injection Systems — 32Clutch — 11Transmission and Driveline — 21Suspension and Steering — 33Brake System — 41Anti-lock brake system — 8Wheels and Tires — 13Body Electrical System — 35Ignition System — 24Lighting — 14Signaling Devices — 7Instruments and Auxiliary Equipment — 54Heating and Ventilation — 7Body Components — 18Troubleshooting — 6Specifications — 13
~1min read

When the ignition is switched on, the brake system warning lamp flashes as a function check; with the engine running, it should go out.


If it flashes for longer or lights up while driving, check the brake fluid level immediately (refer to Brake System). A leak and failure of one brake circuit may have occurred, which can also be noticed by increased brake pedal travel (see Brake System for details).


Brake system warning lamp troubleshooting
PROCEDURE

Checking the lamp: refer to the "Checking the lamp" text in the coolant warning lamp troubleshooting section.

If the lamp flashes with the engine running, although the brake fluid level in the reservoir is above the "min" mark, try disconnecting the connector from the brake fluid level sensor in the reservoir.

If the lamp goes out, the sensor in the reservoir is faulty: replace the reservoir.

Test yourself

A quick Audi 80 quiz: every answer comes with an explanation and a link to the manual page.