Audi Workshop Service and Repair Manuals

Removing and installing regulating flap control unit -J808- –  Remove engine cover panel. –  Unplug electrical connectors -1 and 3-.

–  Unclip coolant hose -2- from intake connecting pipe.

–  Detach hose -2- from activated charcoal filter solenoid valve 1 -N80-. –  Pull activated charcoal filter solenoid valve 1 -N80--1- out of bracket. –  Unclip hose -3- from intake connecting pipe. –  Release spring-type clip -4- and slide it downwards. –  Release spring-type clip -5- and disconnect intake hose from intake connecting pipe.

–  Unscrew bolt -1- from pressure pipe.

–  Unscrew all bolts -arrows- from intake connecting pipe. –  Lift intake connecting pipe slightly and at the same time disconnect connection -1- and rear crankcase breather hose. –  Disconnect intake connecting pipe from pressure pipe and take out intake connecting pipe upwards together with regulating flap control unit -J808-. –  Disconnect intake connecting pipe to remove regulating flap control unit -J808-.

–  To do so, loosen bolts -arrows- on regulating flap control unit -J808-. Installing Installation is carried out in the reverse order; note the following: t  Renew seals and gaskets. t  Hose connections and hoses for charge air system must be free of oil and grease before assembly. t  Secure all hose connections with the correct type of hose clips (same as original equipment). l  Tightening torques → Chapter „Part I: Intake manifold - exploded view“   Note

Lug -1- must engage in recess -2- of air pipe. If a new regulating flap control unit -J808- has been installed: –  Erase learnt values and adapt engine control unit -J623- to regulating flap control unit -J808- using → Vehicle diagnostic tester.