Audi Workshop Service and Repair Manuals

Components A to F are not shown in the exploded drawing.

•     A -    Brake light switch (F) and brake pedal switch (F47)
• ◆ In footwell on pedal bracket near brake pedal
• B -    Diagnostic connector
• ◆ In knee bar on driver's side
•     C -    Fuel pump relay
• ◆ In micro central electrics behind storage compartment on driver's side, relay position 4
•     D -    Clutch pedal switch (F36)
• ◆ In footwell on pedal bracket near clutch pedal

•     E -    Accelerator pedal sender (G79) and accelerator pedal sender 2 (G185)
• ◆ In footwell on accelerator pedal (both senders are fitted in one housing)
•     F -    EPC warning lamp
• ◆ In dash panel insert

• Activated charcoal filter solenoid valve 1 -N80
• Lambda probe (before catalytic converter) -G39 - 55Nm

• Lambda probe (after catalytic converter) -G130 - 55 Nm
• Combination valve for secondary air system
• ◆ Testing, removing and installing

=> 4-Cylinder engine (5-valve turbo), Mechanics; Repair group 26; Testing secondary air system

• Coolant temperature sender -G62
• Engine speed sender -G28

• Secondary air inlet valve
  -N112
• ◆ Fitting location => Fig. 24-15
• ◆ Checking:

=> 4-Cylinder engine (5-valve turbo), Mechanics; Repair group 26; Testing secondary air system

• ◆ Green connector

• Retainer for connectors
• ◆ Fitting location
  => Fig.24-14
• ◆ Accessible with coolant reservoir unbolted and swivelled to the side
• Retainer for connectors
• ◆ Fitting location
  => Fig.24-14
• ◆ Accessible with coolant reservoir unbolted and swivelled to the side

• Electronics box in plenum chamber
• ◆ Fitting location of engine control unit -J220 with integrated altitude sender -F96
• ◆ Fitting location of Motronic current supply relay -J271
• Electronics box in plenum chamber
• ◆ Fitting location of secondary air pump relay -J299
• ◆ Testing secondary air pump relay -J299:

=> 4-Cylinder engine (5-valve turbo), Mechanics; Repair group 26; Testing secondary air system

• Charge pressure sender -G31
• ◆ Fitting location: charge pressure sender -G31 is screwed in at top of charge air cooler
• ◆ Checking:

=> 4-Cylinder engine (5-valve turbo), Mechanics; Repair group 21; Testing charge air system with turbocharger

• Throttle valve control part -J338
• ◆ With throttle valve drive -G186, angle sender for throttle valve drive -G187 and angle sender 2 for throttle valve drive -G188

• Intake air temperature sender -G42
• Air recirculation valve for
  turbocharger -N249
• ◆ Fitting location
  =>Fig.24-15
• Knock sensor 1 -G61
• Knock sensor 2 -G66
• Hall sender -G40
• Injector -N30...-N33

• Ignition coils -N, -N128, -N158, -N163
• Solenoid valve for charge pressure control -N75
• ◆ Checking:

=> 4-Cylinder engine (5-valve turbo), Mechanics; Repair group 21; Testing charge air system with turbocharger

• Air mass meter -G70
• Secondary air pump motor -V101
• ◆ Checking:

=> 4-Cylinder engine (5-valve turbo), Mechanics; Repair group 26; Testing secondary air system

→ Fig.1    Fitting location of connectors

The following connectors are located underneath the coolant expansion tank:

•     1 -    3-pin connector, green
• for knock sensor 1 -G61
•     2 -    4-pin connector, brown
• for lambda probe after catalytic converter -G130 and heating for lambda probe -Z29 (bank 1, probe 2)
•     3 -    3-pin connector, grey
• for engine speed sender -G28
•     4 -    3-pin connector, blue
• for knock sensor 2 -G66
•     5 -    6-pin connector, black
• for lambda probe before catalytic converter -G39 and heating for lambda probe -Z19 (bank 1, probe 1)

→ Fig.2    Fitting location of secondary air inlet valve

-N112 and air recirculation valve for turbocharger

-N249

• ◆ Fitting location: underneath intake manifold

•     1 -    Air recirculation valve for turbocharger -N249
•     2 -    Secondary air inlet valve -N112

Note:

Illustration shows removed intake manifold from below.