Passat Sedan L4-1.9L DSL Turbo (AAZ) (1995)
Thermal Vacuum Valve: Testing and Inspection
EGR Two-Way Valve, Checking
Test conditions
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Engine oil temperature 50 °C minimum
Test sequence
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Switch on ignition
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Disconnect vacuum hose -5- from EGR two-way valve -1- N161
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Disconnect vacuum hose -3- from EGR two-way valve and blow into hose
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The EGR two way valve must allow air to pass to the vacuum pump connection (flow not blocked)
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Disconnect 2 pin harness connector -2- from EGR two-way valve -1-
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Blow again into vacuum hose -3-
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The vacuum connection to the vacuum pump must be closed and the outlet to the outside -arrow- open