Turbocharger Vacuum Diaphragm, Checking

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Hand Vacuum Pump VAS 6213

Procedure

There must be flow through the hose from the turbocharger wastegate bypass regulator valve -N75- to the vacuum diaphragm.
Wastegate bypass regulator valve OK.

-- Remove the engine cover -arrows-.

Fig 1: Identifying Engine Cover

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-- Connect the VAS 6213 to the vacuum diaphragm -arrow-.

Fig 2: Connecting Hand Vacuum Pump VAS 6213 To Vacuum Diaphragm

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-- Move the sliding ring -1- on the hand vacuum pump to the "Pressure" position -arrow B-.

Fig 3: Adjusting Slide Ring On Hand Vacuum Pump VAS 6213 To Position For "Pressure"

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CAUTION:

The vacuum diaphragm could be damaged.

The pressure must not exceed 850 mBar.

-- Activate the hand vacuum pump several times and watch the linkage -A-.

Fig 4: Identifying Linkage Movement

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The linkage must move at approximately 300 mBar.
The linkage must be at the end position at approximately 800 mBar.
The linkage list is approximately 13 mm.

NOTE:

If pressure cannot be generated with the hand vacuum pump or the pressure decreases again immediately, check the hand vacuum pump and connecting hoses for leaks.

Replace the vacuum diaphragm if no malfunction is found, refer to TURBOCHARGER VACUUM DIAPHRAGM .