Audi Workshop Service and Repair Manuals

Schematic diagram

• From fuel tank
• Activated charcoal filter
• ◆ With ACF solenoid valve 1 -N80
• Non-return valve for ACF
• ◆ Between activated charcoal filter and intake pipe upstream of turbocharger
• ◆ Installation position (light side/ dark side) as shown in illustration. Arrow indicates direction of flow
• Turbocharger
• Vacuum/pressure unit for charge pressure control

• Mechanical air recirculation valve
• Brake servo
• Non-return valve
• ◆ Between brake servo and intake manifold
• ◆ Installation position (light side/ dark side) as shown in illustration. Arrow indicates direction of flow
• Solenoid valve for charge pressure control -N75
• Air mass meter -G70
• Air cleaner
• Crankcase breather pressure regulating valve
• Combination valve for secondary air system

• Vacuum reservoir
• ◆ Bolted to cylinder head cover
• Charge air cooler
• ◆ With charge pressure sender -G31
• Fuel pressure regulator
• Throttle valve control part -J338
• Intake manifold
• ◆ With intake air temperature sender sender -G42
• Crankcase breather
• Non-return valve
• ◆ Installation position (light side/ dark side) as shown in illustration. Arrow indicates direction of flow

• Air recirculation valve for
  turbocharger -N249
• ◆ Fitting location
  => Fig.24-143
• Secondary air inlet valve
  -N112
• ◆ Fitting location: below bracket on intake manifold
• Secondary air pump motor -V101
• Non-return valve
• ◆ Between activated charcoal filter and intake manifold
• ◆ Installation position (light side/ dark side) as shown in illustration. Arrow indicates direction of flow
• Charge air cooler

→ Fig.1    Fitting location of air recirculation valve for turbocharger -N249

• ◆ Fitting location: on cylinder head cover

•     1 -    To secondary air inlet valve -N112
•     2 -    Vacuum reservoir
•     3 -    To mechanical air recirculation valve
•     4 -    Air recirculation valve for turbocharger -N249
•     5 -    To connection on intake manifold