Audi Workshop Service and Repair Manuals

Checking activation of secondary air pump relay –  Switch off ignition. –  Disconnect secondary air pump relay. –  Connect voltage tester -V.A.G 1527 B- as follows:

3-position relay carrier in electronics box in plenum chamber, position 2 Contact	Measure against
-6-	Battery positive

l  Vehicle diagnostic, testing and information system -VAS 5051- is connected; vehicle self-diagnosis and vehicle system “01 - Engine electronics” is selected. When doing this the ignition must be switched on.

Display on -VAS 5051-: –  Under selection menu -1- select the diagnostic function “03 - Final control diagnosis”. –  Press the button → until the secondary air pump relay -J299- is activated. l  The LED should flash. –  Exit function “03 - Final control diagnosis” by pressing the ← key. –  Switch off ignition.

If the LED does not flash: –  Connect test box -V.A.G 1598/31- to connectors of wiring harness; do not connect engine control unit. Connect earth clamp of test box to earth (not shown in illustration) → Simos injection and ignition system (4-cyl.); Rep. Gr.24.   Caution To prevent damage to the electronic components, select appropriate measuring range before connecting the measuring cables and observe the test requirements.

–  Check for open circuit and short to positive or earth in the following wiring:

3-position relay carrier in electronics box in plenum chamber, position 2 Contact	Test box -V.A.G 1598/31- Socket
-6-	72

–  Eliminate open circuit in wiring (refer to current flow diagram). If no fault is found: –  Renew secondary air pump relay -J299-.