volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Combi-Valve and Check Valve, Checking|Page 2127 > < Diagram Information and Instructions|Page 2124
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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.

Combi-Valve and Check Valve, Checking|Page 2127 > < Diagram Information and Instructions|Page 2124