audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Exhaust Turbocharger Vacuum Diaphragm, Checking|Page 3672 > < Exhaust Turbocharger Vacuum Diaphragm, Checking|Page 3670
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If the specification was obtained:

Checking Voltage supply

-

Using a multimeter, check the Wastegate Bypass Regulator Valve N75 electrical harness connector terminal 1 to Ground (GND).

Wastegate Bypass Regulator Valve

Measure to

N75 electrical harness connector
terminal
1

Engine Ground (GND)

-

Operate the starter briefly.

Specified value: battery voltage.

-

Switch the ignition off.

If the specification was not obtained:

-

Check the wiring for a short circuit to Battery positive (+) or an open circuit.

-

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-

If necessary, repair the wiring connection.

If no malfunction is found in the wiring:

Checking wiring

If the manufacturers test box is being used. Perform the following step.

-

Install the test box.

If the manufacturers test box is not being used. Perform the following step.

-

Remove the Engine Control Module (ECM) J623.

-

Using a multimeter, check the Wastegate Bypass Regulator Valve N75 electrical harness connector terminal 2 to the Engine Control Module
(ECM) J623 electrical harness connector T60 terminal 4 for resistance.

Turbocharger Recirculating

Engine Control Module (ECM)

Valve N249 electrical harness

J623 electrical connector T60

connector terminal

terminal or test box socket

2

4

Exhaust Turbocharger Vacuum Diaphragm, Checking|Page 3672 > < Exhaust Turbocharger Vacuum Diaphragm, Checking|Page 3670