audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Air Bypass Valve, Turbocharger|Testing and Inspection|Page 7598 > < Air Bypass Valve, Turbocharger|Testing and Inspection|Page 7596
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Checking power supply 
Test requirements: 
^

Fuse for wastegate bypass regulator valve OK

^

Fuel pump relay OK.

^

Connect voltage tester VAG 1527 B as follows:

^

Operate starter briefly.
-

LED must light up.

If the LED does not light up:
^

Check wiring from contact 1 on connector via fuse to fuel pump relay for open circuit:

^

Repair open circuit, if necessary

If the LED lights up:
^

Check actuation.

Checking actuation
^

Connect voltage tester VAG 1527 B to contacts 1 (positive) and 2 of connector.

^

Initiate output Diagnostic Test Mode (DTM) and actuate Wastegate Bypass Regulator valve -N75-.

Air Bypass Valve, Turbocharger|Testing and Inspection|Page 7598 > < Air Bypass Valve, Turbocharger|Testing and Inspection|Page 7596