The Electronic Vacuum Pump - Volkswagen PASSAT - YEAR 2001 Manual

The electronic vacuum pump

All petrol engines which have automatic
transmission conforming to exhaust emission
standard EU4 will have an electrical vacuum
pump for brake servos.
This pump is required:
because not enough vacuum is provided for the
brake booster via the intake manifold during the
cold-starting phase.
For more detailed information, refer to the
separate SSP on the electrical vacuum pump.
The electrical vacuum pump makes for reliable
pneumatic brake boosting.
It is activated by the engine control unit as
required.
251_058a
Running Gear
251_058b
33