Passat Wagon L4-2.0L (ABA) (1995)
Air Injection: Testing and Inspection
Combi-Valve and Check Valve, Checking
COMBI-VALVE AND CHECK VALVE, CHECKING
Special tools, testers and auxiliary items
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VAG 1390 hand vacuum pump
Test sequence
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Disconnect vacuum hose -1- from secondary air injection solenoid valve -2-.
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Connect VAG 1390 hand vacuum pump to vacuum hose -1-.
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Disconnect pressure hose (arrow) from check valve.
WARNING! Do not use compressed air during the following check!
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Connect auxiliary hose to check valve and blow into it.
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Valve must be closed.
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Operate hand vacuum pump.
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Combi-valve must open.