Testing Procedure

NOTE: The recirculating valve for turbocharger -N249- and wire connections are monitored by the Engine Control Module (ECM).

Connect VAS 5051 tester or VAG 1551 scan tool and select control module for engine electronics using "address word" 01. Engine must run at idle for this.
See VEHICLE DIAGNOSTIC, TESTING AND INFORMATION SYSTEM VAS5051 OR VAG1551 SCAN TOOL, CONNECTING AND SELECTING FUNCTIONS .
Check DTC memory of Engine Control Module (ECM).
See ON BOARD DIAGNOSTIC (OBD) - 2.7L V6 BITURBO - APB, BEL .

If a malfunction relating to the recirculating valve for turbocharger -N249- is displayed:
Disconnect hoses from valve; harness connector remains connected.
Attach assisting hose to one connection of valve.
Initiate output Diagnostic Test Mode (DTM) and activate recirculating valve for turbocharger -N249-.
See OUTPUT DIAGNOSTIC TEST MODE (DTM) .

Indicated on display

Fig 1: Output Diagnostic Test Mode - Recirculating Valve For Turbocharger
Courtesy of AUDI OF AMERICA, INC.

Valve must click...

...and must open and close (can be tested by blowing into assisting hose).

If valve does not click:
Check internal resistance of valve. See CHECKING INTERNAL RESISTANCE .
If valve does not open and close properly:
Replace recirculating valve for turbocharger -N249-.