S4 V8-4.2L (BHF) (2004)
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Remove front engine cover - arrows 1 and 2 -.
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Disconnect hoses from Secondary Air Injection (AIR) Solenoid Valve -N112- - arrow - ; electrical harness connector remains connected.
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Attach assisting hose to connection of valve indicated - arrow -.
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Vehicle Diagnostic, Testing and Information System VAS 5051 A connected, "Vehicle Self-Diagnosis" "01 Engine electronics" selected. Ignition
must be switched on for this.
Display on VAS 5051 A:
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In selection - 1 -, click on function "03 - output Diagnostic Test Mode (DTM)".
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Press button repeatedly until Secondary Air Injection (AIR) Solenoid Valve -N112- is actuated.
