volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 5143 > < With Manufacturer's Scan Tool|Page 5141
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Air Injection Control Valve: Testing and Inspection
With Generic Scan Tool

Combination valves, checking

Recommended special tools and equipment

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V.A.G 1390 Hand vacuum pump

Test requirements

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No leaks in vacuum lines or hose connections.

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Vacuum hoses not clogged or kinked

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Pressure hose for Secondary Air Injection (AIR) Pump Motor not clogged or kinked

Test sequence

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Disconnect vacuum hose of the combination valve to be checked at Y - piece (arrow).

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Connect V.A.G 1390 hand vacuum pump to vacuum hose of the valve to be checked.

NOTE:  Do not use pressurized air for the following test!

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Remove front noise insulation.

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Disconnect pressure hose (arrow) between Secondary Air Injection (AIR) Pump Motor and connecting line and blow into it with light pressure.
Both combination valves must be closed.

With Manufacturer's Scan Tool|Page 5143 > < With Manufacturer's Scan Tool|Page 5141