Operation CHARM: Car repair manuals for everyone.

General Information on the Anti-Lock Brake System


General information
The wheels are driven by the test stand.
Throughout the test the transmission should be in neutral on manual transmissions or in position "N" on automatic transmissions.

Follow the instructions provided by the test stand manufacturer when performing the test.

Note: The brake control systems are inoperative when the ignition is in the OFF position.

Vehicles with front-wheel drive
Perform the brake test on a 1-axle roller type test stand.

The test speed must not exceed 6 km/h, otherwise the time delay in setting the rollers in motion could cause the brake control systems to intervene (EDS control).
The Audi-approved test stands meet these criteria.

AWD vehicles
Test on a 1-axle test stand for AWD vehicles
During the test the two wheels on an axle are driven in opposite directions so that no drive is transferred to the other axle.

The test speed must not exceed 6 km/h, otherwise the time delay in setting the rollers in motion could cause the brake control systems to intervene (EDS control).

CAUTION: The Torsen differential will be destroyed if the test speed exceeds 6 km/h.

The Audi-approved test stands meet these criteria.

Test on a 1-axle test stand
The test speed must not exceed 6 km/h, otherwise the time delay in setting the rollers in motion could cause the brake control systems to intervene (EDS control).

The Audi-approved test stands meet these criteria.