Turbocharger Exhaust Vacuum Diaphragm, Checking

Turbocharger Exhaust Vacuum Diaphragm, Checking

Special tools, testers and auxiliary items required

• Hand vacuum pump (VAS 6213)





Test conditions:

• Hose from exhaust turbocharger over Wastegate Bypass Regulator Valve (N75) must have continuity to vacuum diaphragm.

• Wastegate Bypass Regulator Valve (N75) OK.

Work procedure:

- Separate electrical connector - 1 -.





- Disconnect intake connection - arrow - using spring-type clip pliers (VAS 5024A).

- Remove engine cover upward and out in direction of - arrow -.

- Connect Hand Vacuum Pump (VAS 6213) to vacuum diaphragm - arrow -.





- Set slide ring - 1 - on hand vacuum pump (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 Hand Vacuum Pump (VAS 6213) several times and observe rods.

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

Actuator lift is approx. 10 mm.





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