Audi Workshop Service and Repair Manuals

• Activated charcoal filter solenoid valve 1 -N80
• ◆ Testing
• Lambda probe (before catalytic converter) -G39 - 55Nm
• ◆ Checking lambda probe heating before catalytic converter
  
• ◆ Checking lambda probe and lambda control before catalytic converter
  => Page 24-72
• ◆ Testing lambda probe ageing on lambda probe (before catalytic converter) => Page 24-85
• ◆ Removing and installing
  => Page 24-106

• Lambda probe (after catalytic converter) -G130 - 55 Nm
• ◆ Testing lambda probe heating for lambda probe (after catalytic converter) => Page 24-100
• ◆ Checking lambda probe and lambda control after catalytic converter
  => Page 24-89
• ◆ Removing and installing
  => Page 24-106
• Combination valve for secondary air system
• ◆ Only with engine code ANB
• ◆ Testing, removing and installing

=> 4-Cylinder engine (5-valve turbo), Mechanics; Repair group 26; Secondary air system; Removing and installing parts of secondary air system

• Coolant temperature sender -G62
• ◆ Testing

• Fuel pressure regulator
• Engine speed sender -G28
• Secondary air inlet valve
  -N112
• ◆ Only with engine code ANB
• ◆ Fitting location=>Fig. 24-16
• ◆ Testing
• ◆ Green connector
• 4 pin connector
• ◆ Qty. 2
• ◆ For lambda probe (before catalytic converter) -G39 and lambda probe heating -Z19 (black)
• ◆ For lambda probe (after catalytic converter) -G130 and lambda probe heating -Z29 (brown)
• ◆ Fitting location
  => Fig.24-14

• 3 pin connector
• ◆ Qty. 3
• ◆ Fitting location
  => Fig.24-14
• ◆ For knock sensor 1 -G61 (green)
• ◆ For engine speed sender -G28 (grey)
• ◆ For knock sensor 2 -G66 (blue)
• Electronic throttle control warning lamp -K132
• ◆ EPC warning lamp
• ◆ Fitting location
  => Fig.24-15
• Accelerator position sender -G79 and accelerator position sender 2 -G185
• ◆ Fitting location
  => Fig.24-14
• ◆ Testing
• ◆ "Learning" kickdown function
  

• Brake light switch -F and brake pedal switch -F47
• ◆ Fitting location
  => Fig.24-15
• Electronics box in plenum chamber
• ◆ Fitting locations
  =>Fig. 24-16
• ◆ Fitting location of engine control unit -J220 with integrated altitude sender -F96
• ◆ Testing voltage supply of engine control unit
• ◆ Procedure after voltage supply open circuit => Page 24-23
• ◆ Replacing engine control unit => Page 24-24

• ◆ Fitting location of secondary air pump relay -J299 (engine code ANB only)
• ◆ Testing secondary air pump relay -J299:

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

• ◆ Fitting location of Motronic current supply relay -J271 (engine code ANB from model year 2000 only)
• ◆ Testing Motronic current supply relay -J271
• ◆ Fitting location of fuse -S130 for secondary air pump -V101 (engine code ANB only)

• Clutch pedal switch -F36
• ◆ Fitting location
  => Fig.24-15

• Charge pressure sender -G31
• ◆ Fitting location
  =>Fig.24-17
• ◆ Checking:

=> 4-Cylinder engine (5-valve turbo), Mechanics; Repair group 21; Charge air system with turbocharger; Testing charge pressure sender -G31

• 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
• ◆ Testing

• Air recirculation valve for
  turbocharger -N249
• ◆ Fitting location => Fig.24-16
• ◆ Blue connector
• Knock sensor 1 -G61
• Knock sensor 2 -G66
• Hall sender -G163
• 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 and charge pressure control valve

• Air mass meter -G70
• Output stage -N122
• ◆ Testing
• Secondary air pump motor -V101
• ◆ Only with engine code ANB
• ◆ Checking:

=> 4-Cylinder engine (5-valve turbo), Mechanics; Repair group 26; Secondary air system; Removing and installing parts of secondary air system

→ Fig.1    Fitting location of connectors

The following connectors are located underneath the coolant expansion tank:

•     1 -    For lambda probe 2, (after catalytic converter) and heating (brown) - only on engines with engine code ANB.
•     2 -    For lambda probe 1, (before catalytic converter) and heating (black)
•     3 -    For engine speed sender -G28 (grey)
•     4 -    For knock sensor 2 -G66 (blue)
•     5 -    For knock sensor 1 -G61 (green)

→ Fig.2    Fitting location of accelerator position senders -G79 and -G185

→ Fig.3    Fitting location of brake light switch -F, brake pedal switch -F47 and clutch pedal switch -F36

•     1 -    Clip
•     2 -    Clutch pedal switch -F36
•     3 -    Brake light switch -F, Brake pedal switch -F47

Note:

To ensure a secure fitting, the switches may be installed only once.

Adjusting switch:

=> Brake system; Repair group 46

→ Fig.4    Fitting location of electronic throttle control warning lamp -K132

→ Fig.5    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.

→ Fig.6    Fitting locations of components in electronics box in plenum chamber

•     1 -    Engine control unit
•     2 -    Secondary air pump relay -J299
•     3 -    Motronic current supply relay -J271
•     4 -    Fuse -S130 for secondary air pump

→ Fig.7    Fitting location ofcharge pressure sender -G31

Charge pressure sender -G31 -arrow- is installed at top of charge air cooler.