Testing secondary air pump relay -J299 — AUDI

ARG AVV
The secondary air pump relay is located in the electronics box in the plenum chamber, relay position 2.

Secondary air pump motor -V101 is located on the longitudinal member (right side).

Start final control diagnosis and activate secondary air pump relay -J299
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The secondary air pump relay should pick up and secondary air pump motor -V101 should run intermittently.

A - If the relay does not pick up:

Test voltage supply of secondary air pump relay=>Page
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Test activation of secondary air pump relay=>Page
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B - If the relay picks up but the secondary air pump motor does not run:

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Testing voltage supply of secondary air pump relay

Disconnect secondary air pump relay.
Connect hand-held multimeter (voltage test range) as follows:

3-way relay carrier (electronics box in plenum chamber) socket position 2: / contact · Test against /
8 · Engine earth

Specification: approx. battery voltage

If the specification is not obtained:

Carry out the following tests (marked with dots):

Test fuse No. S130 (40 A) in 3-way relay carrier in electronics box, in plenum chamber, socket position 7
Test for open circuit in wiring from battery + (terminal 30) via fuse No. S130 to secondary air pump relay -J299 (located in socket position 2 of 3-way relay carrier in electronics box in plenum chamber.)

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

Connect hand-held multimeter (voltage test range) as follows:

3-way relay carrier (electronics box in plenum chamber) socket position 2: / contact · Test against /
4 · Engine earth

Operate starter briefly.
Specification: approx. battery voltage

If the specification is not obtained:

Carry out the following tests (marked with dots):

Test fuse No. S234 (in fuse box, socket 34).
Test for open circuit in wiring from secondary air pump relay -J299 (located in 3-way relay carrier in electronics box in plenum chamber) to fuel pump relay via fuse No. S234 (in fuse box, socket 34).

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

Testing 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-way relay carrier (electronics box in plenum chamber) socket position 2: / contact · Test against /
6 · Engine earth

Start final control diagnosis and activate secondary air pump relay -J299
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The LED should flash.

If the LED does not flash:

Switch off ignition.
Connect test box V.A.G 1598/31 to wiring harness for engine control unit. Do not connect to the engine control unit itself.
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Test for open circuit and short to positive or earth in the following wiring connections:

3-way relay carrier (electronics box in plenum chamber) socket position 2: / contact · Test box V.A.G 1598/31 / socket
6 · 66

Rectify any open/short circuit as necessary.

If no fault is found:

Fit a new secondary air pump relay -J299.

Testing voltage supply to secondary air pump motor

Unplug connector from secondary air pump motor -V101.
Connect voltage tester V.A.G 1527 B between contacts 1 and 2.
Start final control diagnosis and activate secondary air pump relay -J299
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The LED should light up.

If the LED does not light up:

Carry out the following tests (marked with dots):

Test for open circuit in wiring from connector for secondary air pump motor -V101 to secondary air pump relay -J299 (located in 3-way relay carrier in electronics box in plenum chamber, socket position 2)

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

Test for open circuit in wiring from connector for secondary air pump motor -V101 to earth connection 1 in engine compartment harness

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

If no fault is found:

Renew secondary air pump motor -V101.