Audi Workshop Service and Repair Manuals

Checking secondary air pump relay -J299- or -J316- and activation

Special tools and workshop equipment required

t	Hand-held multimeter -V.A.G 1526 A- or -V.A.G 1526 B-

t	Voltage tester -V.A.G 1527 B-

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

t	Test box -V.A.G 1598/22- (vehicles with throttle cable)

t	Test box -V.A.G 1598/31- (vehicles with electronic throttle)

t	Vehicle diagnostic, testing and information system -VAS 5051- with diagnosis lead -VAS 5051/1-

Test conditions l  Vehicle diagnostic, testing and information system -VAS 5051- with diagnosis lead -VAS 5051/1- is connected; vehicle self-diagnosis and vehicle system “01 - Engine electronics” is selected. When doing this, the ignition must be switched on. l  Fault memory of engine control unit interrogated.

Test sequence Display on -VAS 5051- –  From the menu -1- select the diagnostic function “03 - Final control diagnosis”. –  Press the → button until the secondary air pump relay -J299- or -J316- is activated.

l  The secondary air pump relay -J299- or -J316--item 2- (located in electronics box in plenum chamber) should pick up and the secondary air pump motor -V101- should start up intermittently. –  Exit function “03 - Final control diagnosis” by pressing the ← key, and switch off the ignition. A - If the relay does not pick up: –  Check voltage supply of secondary air pump relay -J299- or -J316- → Anchor. –  Check activation of secondary air pump relay -J299- or -J316- → 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 of secondary air pump relay -J299- or -J316- –  Run windscreen wipers to the vertical position. –  Detach rubber seal from plenum chamber cover in direction of -arrow-. –  Detach plenum chamber cover -1- towards the front.

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

–  Disconnect secondary air pump relay -J299- or -J316--item 2-.

–  Connect up multimeter (voltage measuring range) between relay socket, contact -8- and earth. l  Specification: approx. battery voltage

If specification is not obtained: –  Check secondary air pump fuse -S130- in position -4- on relay and fuse holder in electronics box (plenum chamber). –  Use current flow diagram to check for open circuit in wiring from battery + (terminal 30), via secondary air pump fuse -S130- in position -4-, to secondary air pump relay -J299- or -J316--item 2- in electronics box (plenum chamber). –  Connect multimeter (voltage measuring range) between relay socket, contact 4 and earth. –  Operate the starter briefly. l  Specification: approx. battery voltage If specification is not obtained: –  Repair wiring harness according to current flow diagram. Checking activation of secondary air pump relay -J299- or -J316- –  Switch off ignition. –  Disconnect secondary air pump relay -J299- or -J316-.

–  Connect up voltage tester -V.A.G 1527 B- between relay socket contact -6- and battery positive. –  Repeat function “03 - Final control diagnosis”. –  Press the → button until the secondary air pump relay -J299- or -J316- is activated. l  The LED should flash. –  Exit function “03 - Final control diagnosis” by pressing the ← key, and switch off the ignition. If the LED does not flash: –  Connect test box -V.A.G 1598/22- or -V.A.G 1598/31- to wiring harness leading to engine control unit, but do not connect engine control unit itself → Rep. Gr.24. –  Check for open circuit and short to positive or earth in the following wiring: Vehicles with throttle cable:

Relay socket contact	Test box -V.A.G 1598/22- Socket
-6-	30

Vehicles with electronic throttle:

Relay socket contact	Test box -V.A.G 1598/31- Socket
-6-	46

All models: –  Repair wiring connection if necessary. If no fault in wire is detected: –  Renew secondary air pump relay -J299- or -J316-.

Checking voltage supply for secondary air pump motor -V101- –  Remove noise insulation -arrows-.

–  Unplug electrical connector -2- at secondary air pump motor -V101--item 1-.

–  Connect voltage tester -V.A.G 1527 B- between contacts -1- and -2-. –  Repeat function “03 - Final control diagnosis”. –  Press the → button until the secondary air pump relay -J299- or -J316- is activated. l  The LED should flash. –  Exit function “03 - Final control diagnosis” by pressing the ← key, and switch off the ignition.

If the LED does not flash: –  Use current flow diagram to check for open circuit in wiring between connector at secondary air pump motor -V101- and secondary air pump relay -J299- or -J316-, -item 2- (in electronics box in plenum chamber). –  Use current flow diagram to check for open circuit in wiring between connector at secondary air pump motor -V101- and earth. If no fault is found: –  Renew secondary air pump.