Golf GL L4-2.0L (AEG) (2001)
Air Injection Control Valve: Testing and Inspection
Secondary Air Inlet Valve Checking
Secondary air inlet valve, checking
Engine: AEG
Special tools and equipment
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VAG 1594 Adapter set
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VAG 15927 Diode test light
Requirements
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Coolant temperature 5 to 33°C
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Secondary air pump motor OK.
Work sequence
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Pull upper vacuum hose (arrow) off secondary air inlet valve.
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Start engine and run at idling speed.
When secondary air pump motor runs a vacuum must be perceptible at secondary air inlet valve union.
If no vacuum is perceptible:
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Switch engine off.