audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Wastegate Bypass Regulator Valve -N75-, Checking > < Not Available For Manufacturer's Scan Tool
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Air Bypass Valve: Testing and Inspection
With Generic Scan Tool

Vacuum Diaphragm For Wastegate Bypass Regulator Valve, Checking

Recommended special tools and equipment e.g.:

-

VAG1526 multimeter or VAG1715 multimeter

-

VAG1594 connector test kit

Test requirement

-

Engine oil temperature at least 80 degree C.

Test sequence

-

Disconnect connector at Wastegate Bypass Regulator Valve -N75-(-1-).

-

Start engine and increase speed to maximum RPM by depressing accelerator pedal suddenly. Operating rod -2- for wastegate bypass regulator
valve must move.

If operating rod does not move:

-

Check lever for wastegate bypass regulator valve -1- for ease of movement. If rusted solid, replace turbocharger.

If operating rod does not move despite freely moving lever:

-

Check Wastegate Bypass Regulator Valve - N75-. (Throughput in hose from turbocharger via valve to vacuum diaphragm with connector
disconnected)

If solenoid valve is OK:

-

Replace turbocharger, item no 8.

Wastegate Bypass Regulator Valve -N75-, Checking > < Not Available For Manufacturer's Scan Tool