Audi Workshop Service and Repair Manuals

(only on vehicles with secondary air system)

Fitting location of secondary air inlet valve

• ‒ Start final control diagnosis and activate secondary air inlet valve
  .

• The secondary air inlet valve should click.

If the secondary air inlet valve does not click:

• ‒ → Pull 2-pin connector off valve and connect diode test lamp V.A.G 1527 to disconnected connector using auxiliary cables from V.A.G 1594.

If the diode test lamp now flashes during the final control diagnosis:

• ‒ Fit a new secondary air inlet valve.

=> Repair group 26; Secondary air system; Removing and installing parts of secondary air system

If the diode test lamp still does not flash:

• ‒ Switch off ignition.

• ‒ → Connect test box V.A.G 1598/22 to wiring harness for engine control unit
  .
• ‒ Test for open circuit in the following wiring connection:

• Resistance in wiring: max. 1.5 ω

If no fault in wire is detected:

• ‒ Test voltage supply to valve using current flow diagram.

=> Current flow diagrams, Electrical fault finding and fitting locations binder