Skoda Kodiaq 2017 Workshop Manual page 121

– Open locking valve -A-.
– Close cut-off valves -B+C-.
– Start warm engine (> 60°C), press accelerator briefly (engine
speed greater than 2000/min).
Normally (see notes), the vacuum that is generated should be
between 600 and 950 mbar (depending on engine size).
– Open cut-off valve -C- to evacuate brake servo.
– Switch off engine.
– Read and make a note of measured value shown.
A vacuum decrease of 400 mbar in 12 hours is permissible.
If the vacuum decrease is greater, then check for leaks in the
vicinity of ...
1 - Brake servo
or
2 - Non-return valve, vacuum hoses with connectors and vac‐
uum pump/intake manifold.
If there are large leaks, the vacuum decreases steeply within a
few seconds.
Vacuum check in vicinity of brake servo:
– After generation of vacuum, close cut-off valve -A- in order to
check brake servo vacuum system.
Vacuum check in vicinity of non-return valve, vacuum hoses with
connectors and vacuum pump/intake manifold:
– Once vacuum has been generated, close the shut-off valve
-C- in order to check the vacuum system of the brake servo
vacuum gauge - VAS 6721- up to the intake manifold or the
vacuum pump.
Open cut-off valve -B- to facilitate removal of hose connections
and adapter.
Kodiaq 2017 ➤ , Kodiaq 2019 ➤
Brake systems - Edition 11.2018
4. Vacuum system
117