Checking internal resistance

• Switch ignition off.
• Remove engine cover (arrows).
• Disconnect connector from solenoid valve.
  Fig 1: Removing Engine Cover

  Courtesy of AUDI OF AMERICA, INC.
• Connect multimeter at valve for resistance measurement.
  • Specified value: 10-18 Ω

If specified value is not obtained:

• Replace valve.
  Fig 2: Measuring Resistance Of Solenoid Valve For Camshaft Adjustment

  Courtesy of AUDI OF AMERICA, INC.