turn signal AUDI A4 1999 B5 / 1.G Brakes ESP Bosch 5.3 Workshop Manual

01-220

ASR/ESP button -E256-
The button enables the driver to switch off the
ESP function. By operating the brake pedal or by
pressing the button again, it is switched back on.
If re-activation is forgotten, the system
automatically reactivates itself once the vehicle is
restarted. The system cannot be switched off
when ESP is actively engaged and above a
specific speed.

Brake recognition switch (ESP) -F83-
The brake recognition switch (ESP) is also
identified as a release switch and it functions like
a pole-changing switch. When the driver brakes,
the switch changes from signal terminal 1 to
signal terminal 2. Since only one signal terminal
is ever closed, the system easily recognizes the
current condition and the release switch thereby
offers a high degree of personal safety.

Hydraulic pump for traction control -V156-
In order to generate the required admission
pressure on the intake side of the return flow
pump, an additional hydraulic pump is
necessary. Boost pressure is limited via a throttle
in the main cylinder, the hydraulic pump for
traction control -V156- itself is not regulated.
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11/20/2002 htt
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