Brake Test; General Information; Checking Vehicles With Front-Wheel Drive; Checking Vehicles With Four-Wheel Drive - Volkswagen Passat 2011 Workshop Manual

Passat 2011 ➤ , Passat Variant 2011 ➤
Brake systems - Edition 02.2014
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Brake test

⇒ "3.1 General information", page 4
⇒ "3.2 Checking vehicles with front-wheel drive", page 4
⇒ "3.3 Checking vehicles with four-wheel drive", page 4
3.1

General information

♦ The drive is provided by the roller dynamometer.
♦ For the test ensure for vehicles with a manual gearbox that the
gear lever is in neutral, and for vehicles with an automatic
gearbox that the selector lever is in »N«.
♦ For the test, observe the specifications provided by the man‐
ufacturer of the roller dynamometer.
Note
The brake regulation systems do not function when ignition is off.
3.2

Checking vehicles with front-wheel drive

The brake test must be performed on a single-axle roller dyna‐
mometer.
The maximum test speed must not exceed 6 km/h.
The test rigs authorised by Volkswagen fulfil these requirements.
3.3

Checking vehicles with four-wheel drive

with Haldex coupling
⇒ "3.3.1 On a regulated roller dynamometer with contra-rotating
rollers for four-wheel drive vehicles", page 4
⇒ "3.3.2 Without roller dynamometer for four-wheel drive vehi‐
cles", page 5
3.3.1 On a regulated roller dynamometer with
contra-rotating rollers for four-wheel
drive vehicles
The brake test must be performed on a regulated single-axle roller
dynamometer with contra-rotating rollers for four-wheel drive ve‐
hicles.
"Contra-rotating" means that the dynamometer rollers are driven
forwards on one side and backwards on the other side.
"Regulated" means that the speed of the brake test stand rollers
is so controlled so that there is no difference in speed during the
brake test.
This prevents the transfer of a force through the stationary wheels
(not on the set of rollers) via the propshaft to the rotating wheels
on the rollers.
The forward rotating wheel is measured during the test, which
means two brake tests per axle must be performed.
The maximum test speed must not exceed 6 km/h.
The test rigs authorised by Volkswagen fulfil these requirements.
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Rep. gr.00 - Technical data