Audi Workshop Service and Repair Manuals

• Solenoid valve 1 for activated charcoal filter -N80
• ◆ Checking
• Lambda probe upstream of catalytic converter -G39 - 55Nm
• ◆ Constant lambda probe
• ◆ Check lambda probe and lambda control upstream of catalytic converter
• ◆ Check lambda probe ageing upstream of catalytic converter=> Page 24-86
• ◆ Check lambda probe heating upstream of catalytic converter => Page 24-90
• ◆ Removing and installing
  

• Check lambda probe downstream of catalytic converter -G130 - 55Nm
• ◆ Check lambda probe and lambda control downstream of catalytic converter => Page 24-95
• ◆ Check lambda probe heating downstream of catalytic converter => Page 24-107
• ◆ Removing and installing
  
• Combi valve for secondary air inlet
• ◆ Checking, removing and installing:

=> 4-cylinder engine (5-valve turbo), Mechanical components; Repair group 26; Check secondary air system

• Coolant temperature sender -G62
• ◆ Checking

• Fuel pressure regulator
• ◆ Checking => Page 24-35
• Engine speed sender -G28
• ◆ Checking => Page 28-26
• Checking secondary air inlet valve
  -N112
• ◆ Fitting location =>Fig.24-14
• ◆ Checking:

=> 4-cylinder engine (5-valve turbo), Mechanical components; Repair group 26; Check secondary air system

• ◆ Connector green

• Bracket for connectors
• ◆ Fitting location => Fig.24-13
• ◆ Accessible with coolant expansion tank removed and moved to side

• Instrument cluster:
• ◆ With fault lamp for electronic throttle -K132 ("EPC" warning lamp). Notes on EPC warning lamp .
• ◆ With exhaust warning lamp -K83. Notes on exhaust warning lamp
• Gas pedal position sender -G79 and sender 2 for gas pedal position -G185
• ◆ Fitting location => Fig.24-15
• ◆ Checking
• ◆ Adapt kickdown function
• Brake light switch - F and brake pedal switch -F47
• ◆ Fitting location => Fig.24-14

• Electronics box in plenum chamber
• ◆ Fitting locations =>Fig.24-15
• ◆ Fitting location for engine control unit -J220 with integrated altitude sender -F96
• ◆ Check power supply to engine control unit => Page 28-35.
• ◆ Procedure following interruption of voltage supply => Page 24-22
• ◆ Replace engine control unit => Page 24-23
• ◆ Fitting location for secondary air pump relay -J299
• ◆ Check secondary air pump relay -J299:

=> 4-cylinder engine (5-valve turbo), Mechanical components; Repair group 26; Check secondary air system

• ◆ Fitting location for power supply relay for Motronic -J271
• ◆ Check power supply relay for Motronic -J271
• ◆ Fitting location for fuse S130 for secondary air pump

• Clutch pedal switch -F36
• ◆ Fitting location => Fig.24-14
• Boost pressure sender -G31
• ◆ Fitting location =>Fig.24-16
• ◆ Checking:

=> 4-cylinder Engine (5-valve Turbo), Mechanical components; Repair group 21; Checking charge air system with exhaust gas turbocharger

• Throttle valve control unit -J338
• ◆ With throttle valve drive -G186, angle sender for throttle valve drive -G187 and angle sender 2 for throttle valve drive -G188
• ◆ Checking => Page 24-124
• Intake air temperature sender -G42
• ◆ Checking
• Air recirculation valve for turbocharger -N249
• ◆ Fitting location =>Fig.24-14
• ◆ Connector blue
• Knock sensor 1 -G61
• Knock sensor 2 -G66
• Hall sender -G40
• ◆ Checking => Page 28-46

• Injector -N30...-N33
• ◆ Checking => Page 24-40
• ◆ Removing and installing
  
• Ignition coils -N, -N128, -N158, -N163
• ◆ Checking
• Boost pressure control solenoid valve -N75
• ◆ Checking:

=> 4-cylinder Engine (5-valve Turbo), Mechanical components; Repair group 21; Checking charge air system with exhaust gas turbocharger

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

=> 4-cylinder engine (5-valve turbo), Mechanical components; Repair group 26; Check secondary air system

→ Fig.1    Fitting location for connectors

The following connections are located underneath the coolant expansion tank:

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

→ Fig.2    Fitting location for secondary air inlet valve -J17

Fuel pump relay -J17 on central electrics in driver's left footwell, position 4.

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

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

Note:

Switch must only be installed once in order to ensure that it is sufficiently tight.

Adjust switch:

=> Brake systems; Repair group 46; Removing and installing brake pedal

→ Fig.4    Installation position secondary air inlet valve

-N112 and air recirculation valve for turbocharger

-N249

• ◆ Location: underneath intake pipe

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

Note:

The illustration shows bottom view of intake pipe.

→ Fig.5    Installation position for accelerator pedal position sender -G79 and sender 2 for accelerator pedal position -G185

→ Fig.6    Fitting locations in electronics box (plenum chamber)

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

→ Fig.7    Fitting location boost pressure sender -G31

Boost pressure sender -G31 -arrow- screwed into top of charge air cooler.