volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Ignition System > < Wastegate Bypass Regulator Valve N75, Checking
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Wastegate: Testing and Inspection
Wastegate Bypass Regulator Valve Pressure Unit, Checking

Special tools and equipment

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V.A.G 1551 Scan Tool or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3

Checking conditions

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Engine oil temperature min. 80 °C

Checking sequence

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Disconnect Wastegate Bypass Regulator valve -N75- -1 - connector -2-.

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Start engine and raise to maximum rpm briefly using throttle.
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Operating rod -2- must move.

If the operating rod does not move:

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Check valve lever -1- for ease of movement.

If corroded together:

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Replace turbocharger.

If the operating rod does not move, even though the lever is free to move:

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Test Wastegate Bypass Regulator valve -N75-.
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Hose from turbocharger via valve to pressure unit not blocked when connector is pulled off

If the valve -N75- is OK:

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Replace turbocharger.

Ignition System > < Wastegate Bypass Regulator Valve N75, Checking