Checking activation

• Connect VAG 1527B voltage tester to connector terminals 1 (B+) and 2.
• Initiate output Diagnostic Test Mode (DTM) and activate recirculating valve for turbocharger -N249-.

  See OUTPUT DIAGNOSTIC TEST MODE (DTM) .

  • LED must blink

If LED does not blink or if it remains constantly lit:

• Connect VAG 1598/31 test box at wiring harness to ECM, do not connect ECM.

  See WIRING AND COMPONENT CHECK WITH VAG1598/31 TEST BOX .

• Check following wire connections for open circuit and short circuit to Ground (GND) and B+:
  RECIRCULATING VALVE FOR TURBOCHARGER HARNESS CONNECTOR TERMINAL SPECIFICATIONS
  
  

  Harness connector terminal	VAG 1598/31 test box Bushing
  2	9

• Repair open circuit or short circuit if necessary.
  Fig 1: Identifying Recirculating Valve For Turbocharger Harness Connector Terminals

  Courtesy of AUDI OF AMERICA, INC.

If wire connection is OK:

• Replace Engine Control Module (ECM).

  See MOTRONIC ENGINE CONTROL MODULE (ECM) -J220- (WITHOUT METAL ANTI -THEFT HOUSING), REPLACING or MOTRONIC ENGINE CONTROL MODULE (ECM) -J220- (WITH METAL ANTI -THEFT HOUSING), REPLACING .