S5 Quattro Coupe V8-4.2L (CAUA) (2009)
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Blow lightly into the assisting hose by mouth, do not use compressed air.
‹› AIR combination valve must be closed, it must not be possible to blow through.
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Blow forcefully into the assisting hose by mouth, do not use compressed air.
‹› The AIR combination valve must open, it must be possible to blow through.
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If the switch point cannot be detected, replace AIR combi-valve: Left => [ Secondary Air Injection Left Combination Valve ] See: Service and
Repair/Secondary Air Injection Left Combination Valve, right => [ Secondary Air Injection Right Combination Valve ] See: Service and
Repair/Secondary Air Injection Right Combination Valve.
Assembling
Assembly is in reverse order of removal, note the following:
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Install the plenum chamber bulkhead.