New Beetle Turbo S L4-1.8L Turbo (AWP) (2002)
Exhaust Bypass Valve: Testing and Inspection
Charge Pressure Bypass Valve, Checking
Charge pressure bypass valve, checking
Special tools and equipment
-
VAG 1390 Hand vacuum pump
Test conditions
-
Reduced performance or load change shudders
-
Turbocharging noises during closing of throttle valve
Test sequence
Note:
The charge pressure bypass valve is located in front of the turbocharger. It is opened by vacuum pressure during the overrun phase and at
idling speed.
-
Connect hand vacuum pump VAG 1390 to vacuum connection on charge pressure bypass valve.
-
Operate hand vacuum pump.
Charge pressure bypass valve must open in direction of -arrow-.
-
Operate vent valve on hand vacuum pump.
Valve must close -arrow-.
-
If valve does not open or close, replace valve.
Note:
The charge pressure bypass valve connections are secured with screw type clamps.