Checking activation

• Connect VAG 1527B voltage tester between terminal 1 (+) and 2.
• Initiate output Diagnostic Test Mode (DTM) and activate valve for camshaft adjustment.

  See OUTPUT DIAGNOSTIC TEST MODE (DTM) .

  • LED must blink
  Fig 1: Identifying Solenoid Valve For Camshaft Adjustment Harness Connector Terminals

  Courtesy of AUDI OF AMERICA, INC.

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 See VEHICLE DIAGNOSTIC, TESTING AND INFORMATION SYSTEM VAS5051 OR VAG1551 SCAN TOOL, CONNECTING AND SELECTING FUNCTIONS .

• Check following wire connections for open circuit and short circuit to Ground (GND) and B+:

Valve 1 for camshaft adjustment -N205- and valve 2 for camshaft adjustment -N208-

Fig 2: Identifying Solenoid Valve For Camshaft Adjustment Harness Connector Terminals

Courtesy of AUDI OF AMERICA, INC.

• Repair Ground (GND) connection or open circuit if necessary.

If wire connection is OK:

• Replace Engine Control Module (ECM).

See MOTRONIC MULTIPORT FUEL INJECTION (MFI) SYSTEM, SERVICING .

If no malfunctions are detected:

• Replace mechanical camshaft adjuster.