Turbocharger Vacuum Diaphragm, Checking

Turbocharger Vacuum Diaphragm, Checking

Special tools, testers and auxiliary items required

• Hand Vacuum Pump (VAS 6213)

Test Conditions:

• Hose from the exhaust turbocharger over wastegate bypass regulator valve (N75) must have continuity to vacuum diaphragm.

• Wastegate bypass regulator valve OK.

Work Procedure:






- Remove the engine cover - arrows -.

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






- Adjust slide ring - 1 - on (VAS 6213) to - B - position for "Pressure".






The pressure must not exceed 750 mbar. If the pressure is exceeded, the vacuum diaphragm can be damaged.

- Operate the (VAS 6213) several times; watch the linkage while doing this.

The linkage - A - must move approximately 300 mbar and be at approximately 700 mbar at end position.

Actuator lift is approximately 10 mm.






• If the pressure cannot be raised with (VAS 6213) or pressure drops immediately, check (VAS 6213) and connecting hoses for leaks. If no malfunction can be found: Replace vacuum diaphragm, refer to => [ Turbocharger Vacuum Diaphragm ] Service and Repair.