Jetta Sedan L5-2.5L (BGP) (2005)
Air Injection Control Valve: Testing and Inspection
Secondary Air Injection Solenoid Valve, Checking
Exhaust System, Emission Controls
Secondary Air Injection Solenoid Valve, Checking
Special tools, testers and auxiliary items required
‹› Connector test set (VAG 1594C)
‹› Assisting hose, e.g. coolant hose
Test Sequence
‹› Do not use compressed air during the following check!
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Remove the engine cover with air filter. Refer to --> [ Engine Cover with Air Filter ] .
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Disconnect the pressure hose - 2 - from the Secondary Air Injection (AIR) Solenoid Valve - 3 -. To do so, compress the securing ring.
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Disconnect the electrical connector - 4 -.
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Slide the assisting hose - 1 -, e.g. coolant hose, into the AIR solenoid valve.
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Blow forcefully into the assisting hose - arrow -.
Valve must be closed.
If air can be blown through the valve with the assisting hose properly sealed:
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Replace the AIR solenoid valve.
If valve is closed:
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Connect the connector - 5 - with adapter cables from the (VAG 1594C) to the battery positive (+) and negative (-) terminals.
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Blow forcefully into the assisting hose - arrow -.
Valve must be opened.
If no air can be blown through the valve with the assisting hose properly sealed:
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Replace the AIR solenoid valve.
On Board Diagnostic (OBD)