Charge Air Regulation Vacuum Diaphragm, Checking

Charge Air Regulation Vacuum Diaphragm, Checking

Special tools, testers and auxiliary items required

• Hand vacuum pump (VAS 6213)

Test Conditions

• The hose from the turbocharger to wastegate bypass regulator valve must have continuity to vacuum diaphragm.

• The wastegate bypass regulator valve is OK.

Test Sequence

- Remove the engine cover. Refer to --> [ Engine Cover ] .

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





- Set the slide ring - 1 - on the (VAS 6213) to position - B - for "pressure".





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

- Operate the (VAS 6213) several times and observe rods:

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





• Actuator lift is approximately 10 mm.

If pressure cannot be built up using the (VAS 6213) or pressure falls again immediately:

- Check the (VAS 6213) and the connecting hoses for leaks.

If no malfunction can be found:

- Replace the vacuum diaphragm. Refer to --> [ Charge Air Regulation Vacuum Diaphragm ] .