audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

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Cruise control system for vehicles with electronic throttle > < Removing and installing vent valves

A4 Mk1

Checking vacuum system for leaks
Checking vacuum system for leaks
Procedure
–  Disconnect vacuum line from vacuum pump and seal tight.
–  Remove driver's storage compartment → Rep. Gr.68.
–  Push in the actuator diaphragm, and at the same time press the brake pedal down to the point of resistance.
–  Then release brake pedal.
l  The diaphragm must not move.
  Note
Malfunctions can be caused by incorrectly adjusted vent valves, leaking actuators or by cracks in the vacuum hoses.
   

Cruise control system for vehicles with electronic throttle > < Removing and installing vent valves