Vacuum System, Checking

Special tools and workshop equipment required 

• Hand Vacuum Pump:VAS6213 
  Fig 1: Hand Vacuum Pump VAS 6213

  Courtesy of AUDI OF AMERICA, LLC

Procedure 

-- Check all vacuum lines in the entire vacuum system for:

• Cracks
• Damage caused by animals
• Pinching
• Porous locations and other leaks

-- Check the vacuum line leading both to and from the solenoid valve to the respective component.

-- If there is a DTC memory entry, check the vacuum lines for the named component, but also check all the vacuum lines.

-- If using the Hand Vacuum Pump:VAS6213  does not produce any pressure or if the pressure drops again right away, then check the hand vacuum pump and the connection hoses for leaks.