Audi Workshop Service and Repair Manuals

Checking secondary air pump relay -J299- and secondary air pump motor -V101- Special tools and workshop equipment required

t  Hand-held multimeter -V.A.G 1526D-

t  Voltage tester -V.A.G 1527B-

t  Auxiliary measuring set -V.A.G 1594C-

t  Adapter cable, 121-pin -V.A.G 1598/31- t  Vehicle diagnostic, testing and information system -VAS 5051B- Procedure l  Vehicle diagnostic, testing and information system -VAS 5051B- connected. l  Engine running. l  Vehicle self-diagnosis and vehicle system “01 - Engine electronics” selected.

Display on -VAS 5051B-: –  From menu -1-, select diagnostic function “Interrogate fault memory” and press → key to continue. If the display shows a fault relating to secondary air pump relay -J299-: –  Press ← key to terminate function “Interrogate fault memory”. –  Switch off engine, then switch on ignition again. –  From menu -1- select diagnostic function “Final control diagnosis”.

–  Press the → key repeatedly until the following display appears: Display on -VAS 5051B-: 3 -  Secondary air pump relay -J299- A -  Actuator is running; continued switching is allowed

l  The secondary air pump relay -J299--item 2- (located in electronics box in plenum chamber) should pick up and the secondary air pump motor -V101- should start up intermittently. –  Press ← key to terminate diagnostic function “Final control diagnosis”. –  Select function “End output” and switch off ignition. A - If the relay does not pick up: –  Checking voltage supply of secondary air pump relay -J299- → Anchor. –  Check activation of secondary air pump relay -J299- → Anchor. B - If the relay picks up but the secondary air pump motor -V101- does not run: –  Check voltage supply of secondary air pump motor -V101- → Anchor.

Checking voltage supply for secondary air pump relay -J299- –  Remove seal -arrows-. –  Pull off plenum chamber cover -1- towards front of vehicle.

–  Remove bolts -arrows- and detach cover for electronics box in plenum chamber.

–  Detach relay for secondary air pump -J299--item 2-.

–  Connect hand-held multimeter -V.A.G 1526D- (voltage measuring range) between relay socket, contact -8- and earth. l  Specification: approx. battery voltage. –  If specification is not attained, check for open circuit in wiring between secondary air pump relay -J299- via secondary air pump fuse -S130- to battery + (terminal 30) → Current flow diagrams, Electrical fault finding and Fitting locations.

–  Connect hand-held multimeter -V.A.G 1526D- (voltage measuring range) between relay socket, contact -4- and earth. –  Briefly operate starter. l  Specification: approx. battery voltage. –  If specification is not attained, check for open circuit in wiring between secondary air pump relay -J299- via fuse in fuse holder -S234- to fuel pump relay -J17- → Current flow diagrams, Electrical fault finding and Fitting locations.

Checking activation of secondary air pump relay -J299- –  Switch off ignition. –  Detach relay for secondary air pump -J299--item 2-.

–  Connect voltage tester -V.A.G 1527B- between contact -6- of relay socket at position “2” in 3-position relay carrier in electronics box in plenum chamber and earth “–”.

–  Switch on ignition and select vehicle system “01 - Engine electronics” again. –  Press the → key repeatedly until the following display appears: Display on -VAS 5051B-: 3 -  Secondary air pump relay -J299- A -  Actuator is running; continued switching is allowed l  The LED should flash. –  Press ← key to terminate diagnostic function “Final control diagnosis”. –  Select function “End output” and switch off ignition.

–  If LED does not flash or lights up continuously, connect adapter cable, 121-pin -V.A.G 1598/31- (test box) to connectors of wiring harness; do not connect engine control unit. Connect earth clip of test box to earth → Rep. Gr.24.

–  Check for open circuit and short to positive or earth in the following wiring for secondary air pump relay -J299-.

Connector Contact	-V.A.G 1598/31- Socket
-6-	66

–  Repair wiring connection if necessary. If no fault is found: –  Renew secondary air pump relay -J299-.

Checking voltage supply for secondary air pump motor -V101- –  Release fasteners -arrows- and remove noise insulation.

–  Unplug electrical connector -arrow- at secondary air pump motor -V101- at front right of engine compartment below air cleaner housing.

–  Connect voltage tester -V.A.G 1527B- between contacts -1- and -2- of connector for secondary air pump motor -V101-. –  Switch on ignition and select vehicle system “01 - Engine electronics”.

–  Repeat diagnostic function “Final control diagnosis”. –  Press the → key repeatedly until the following display appears: Display on -VAS 5051B-: 3 -  Secondary air pump relay -J299- A -  Actuator is running; continued switching is allowed l  The LED should flash. –  Press ← key to terminate diagnostic function “Final control diagnosis”. –  Select function “End output” and switch off ignition.

If the LED does not flash: –  Check for open circuit in wiring from contact -1- of connector to secondary air pump relay -J299- (on 3-position relay carrier in electronics box in plenum chamber, position “2”) → Current flow diagrams, Electrical fault finding and Fitting locations. –  Check for open circuit in wiring from contact -2- of connector to earth → Current flow diagrams, Electrical fault finding and Fitting locations. –  If no fault is found, renew secondary air pump motor -V101-.