S5 Quattro Coupe V8-4.2L (CAUA) (2009)
Air Injection Control Valve: Testing and Inspection
Combination Valve, Checking
Combination Valve, Checking
Special tools, testers and auxiliary items required
‹› Hand vacuum pump
Test conditions
‹› Hose connections properly sealed.
Work sequence
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Remove the engine compartment trim.
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Remove the engine cover - 2 -.
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Remove the air filter housing bolts - arrows -.
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Remove the air guide hoses - 1 - and - 6 - from the air filter housing.
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Disconnect the mass air flow (MAF) sensor (G70) - 5 - and the mass air flow (MAF) sensor 2 (G246) - 3 - electrical connectors.
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Loosen the hose clamps - 2 - and - 4 - and remove the air filter housing.