Test sequence

• Connect vehicle diagnostic, test and information system VAS 5051 and select vehicle system "01 - Engine electronics". When doing this ignition must be on.

  See VEHICLE DIAGNOSTIC, TESTING AND INFORMATION SYSTEM VAS 5051, CONNECTING AND SELECTING FUNCTIONS .

• Check fault memory of engine control module.

  See FAULT MEMORY, INTERROGATING AND ERASING .

  If display shows a fault relating to Recirculating valve for turbocharger -N249-:

• Open quick-release fasteners -1- and -2- and lift off engine cover panel (arrows).
Fig 1: Opening Fasteners -1- And -2- And Lifting Off Engine Cover Panel
Courtesy of AUDI OF AMERICA, INC.
• Disconnect hoses from Recirculating valve for turbocharger -N249- -item 2-; electrical connector remains connected.
Fig 2: Disconnecting Hoses From Recirculating Valve
Courtesy of AUDI OF AMERICA, INC.
• Connect test hose to valve at connection marked with (arrow).

• Vehicle diagnostic, testing and information system VAS 5051 is connected; vehicle system "01 - Engine electronics" is selected. Ignition must be switched on.

Display on VAS 5051:

• Select diagnosis function "03 - Final control diagnosis" from menu -1-
• Press the > button repeatedly until following display appears:

Display on VAS 5051:

A - Actuator test is waiting - Continued switching required

6 - Air recirculation valve for turbocharger -N249-

• Press the > button.

Display on VAS 5051:

A - Actuator is running - Continued switching allowed

• Valve should click...
• ...and open and close (can be checked by blowing into auxiliary hose).

• Press the < button to exit from function "03 - Final control diagnosis".

If valve does not click:

• Test internal resistance of valve. See TESTING INTERNAL RESISTANCE .

If valve does not open and close properly:

• Replace Recirculating valve for turbocharger -N249-.