Passat V6-2.8L (ATQ) (2004)
Air Injection Control Valve: Testing and Inspection
Combination Valves, Checking
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.