Audi Workshop Service and Repair Manuals

Checking voltage supply of secondary air pump motor -V101-

Vehicles with auxiliary heater: –  Remove bolts -arrows- securing exhaust pipe for auxiliary/additional heater to noise insulation.

All models: –  Remove noise insulation -arrows-.

–  Unplug electrical connector -1- at secondary air pump motor -V101-.   Note! Shown in illustration with bumper removed.

–  Connect voltage tester -V.A.G 1527 B- between contacts -1- and -2-. 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: –  Perform the following checks marked with a dot. l  Check for open circuit in wiring from connector on secondary air pump motor -V101- to secondary air pump relay -J299--item 2- (on 3-position relay carrier in electronics box in plenum chamber, position 2). l  Check for open circuit in wiring from contact 1 of connector to earth (refer to current flow diagram). –  Eliminate open circuit in wiring (refer to current flow diagram). If no fault is found: –  Renew the secondary air pump → Chapter.