Audi Workshop Service and Repair Manuals

Overview of fitting locations

1 -	Lambda probe -G39- with Lambda probe heater -Z19-

q	For fitting locations of Lambda probes and protective cover for connectors, refer to → Fig., → Fig.

q	For marking of connectors for Lambda probes, refer to → Fig., → Fig.

q	Checking Lambda probe and lambda control upstream of catalytic converter → Chapter

q	Checking for ageing of Lambda probe upstream of catalytic converter → Chapter

q	Checking heating for Lambda probe upstream of catalytic converter → Chapter

q	Removing and installing → Chapter

1 -	Lambda probe, after catalytic converter -G130- with Lambda probe heater 1, after catalytic converter -Z29-

q	For fitting locations of Lambda probes and protective cover for connectors, refer to → Fig.

q	For marking of connectors for Lambda probes, refer to → Fig., → Fig.

q	Checking Lambda probe and lambda control downstream of catalytic converter → Chapter

q	Checking heating for Lambda probe downstream of catalytic converter → Chapter

q	Removing and installing → Chapter

2 -	Hall sender -G40-

q	Checking → Chapter

3 -	Injector, cylinder 1 -N30- ...injector, cylinder 4 -N33-

q	Checking → Chapter

q	Removing and installing → Chapter

4 -	Motronic control unit -J220-

q	Checking voltage supply of engine control unit → Chapter

q	Replacing → Chapter

5 -	Ignition coil 1 with output stage -N-, ignition coil 2 -N128-, ignition coil 3 -N158-, ignition coil 4 -N163-

q	Checking → Chapter

6 -	Solenoid valve for charge pressure control -N75-

q	Checking: 4-cylinder engine (5-valve turbo), mechanics → Rep. Gr.21

7 -	Accelerator pedal position sender -G79- and accelerator pedal position sender 2 -G185-

q	Fitting location → Fig.

q	Checking → Chapter

q	Kick-down function adaption for vehicles with automatic gearbox → Chapter

8 -	Brake light switch -F- and brake pedal switch -F47-

q	Fitting location → Fig., → Fig.

9 -	Clutch pedal switch -F36-

q	Fitting location → Fig., → Fig.

10 -	Instrument cluster

q	With electronic power control fault lamp -K132- (“EPC” warning lamp) Notes on EPC warning lamp → Chapter

q	With exhaust emissions warning lamp -K83-. Notes on exhaust emissions warning lamp → Chapter

11 -	Motronic current supply relay -J271-

q	Fitting location → Fig., → Fig.

q	Checking → Chapter

12 -	Secondary air pump relay -J299-

q	Fitting location → Fig., → Fig.

q	Checking: → 4-cylinder engine (5-valve turbo), mechanics; Rep. Gr. 26; Checking secondary air system

13 -	Air mass meter -G70-

q	Checking → Chapter

14 -	Coolant temperature sender -G62-

q	Checking → Chapter

q	If necessary release pressure in cooling system before removing

15 -	Inlet camshaft timing adjustment valve 1 -N205- 4-cylinder engine (5-valve turbo), mechanics → Rep. Gr.15

16 -	Fuel pressure regulator

q	Checking → Chapter

17 -	Engine speed sender -G28-

q	Checking → Chapter

18 -	Knock sensor 2 -G66-

19 -	Turbocharger air recirculation valve -N249-

q	Fitting location → Fig., → Fig.

q	Checking: 4-cylinder engine (5-valve turbo), mechanics → Rep. Gr.21

20 -	3-pin connector

q

3 x

q	Fitting location → Fig., → Fig.

q	For knock sensor 1 -G61-

q	For engine speed sender -G28-

q	For knock sensor 2 -G66-

21 -	Secondary air inlet valve -N112-

q	Fitting location → Fig., → Fig.

q	Checking: 4-cylinder engine (5-valve turbo) → Rep. Gr.26

22 -	Knock sensor 1 -G61-

23 -	Intake air temperature sender -G42-

q	Checking → Chapter

24 -	Secondary air pump motor -V101-

q	Checking: 4-cylinder engine (5-valve) → Rep. Gr.26

25 -	Power steering pressure switch -F88-

q	Fitting location → Fig., → Fig.

26 -	Throttle valve module -J338-

q	With throttle valve drive (electric power control) -G186-, throttle valve drive angle sender 1 (electric power control) -G187- and throttle valve drive angle sender 2 (electric power control) -G188-

q	Checking → Chapter

q	Perform adaption after renewal → Chapter

27 -	Activated charcoal filter solenoid valve 1 -N80-

q	Checking → Chapter

28 -	Charge air pressure sender -G31-

q	Screwed into top of charge air cooler

q	Checking: 4-cylinder engine (5-valve turbo), mechanics → Rep. Gr.21

Fitting location of turbocharger divert air valve -N249- and secondary air inlet valve -N112- t  Fitting location: below front bracket on intake manifold 1 -  Secondary air inlet valve -N112- 2 -  Non-return valve 3 -  To vacuum reservoir 4 -  To mechanical air recirculation valve 5 -  To secondary air system combination valve 6 -  To connection on intake manifold 7 -  Turbocharger divert air valve -N249-

Fitting location of accelerator pedal position sender -G79- and accelerator pedal position sender 2 -G185-   Note Diagram shows set-up on left-hand drive vehicles.

Fitting location of Lambda probes and protective cover for connectors 1 -  Lambda probe -G39- and Lambda probe heater -Z19- 2 -  Protective cover for connectors 3 -  Lambda probe after catalytic converter -G130- and Lambda probe 1 heater after catalytic converter -Z29- The connectors for the Lambda probes and Lambda probe heating are accessible on the floor of the vehicle (right-side) after unscrewing the protective cover -arrows-.

Identification of connectors

Black connector	For Lambda probe -G39- and Lambda probe heater -Z19-
Brown connector	For Lambda probe after catalytic converter -G130- and Lambda probe 1 heater after catalytic converter -Z29-

Fitting location of 3-pin connectors 1 -  For knock sensor 1 -G61- 2 -  For engine speed sender -G28- 3 -  For knock sensor 2 -G66-

Fitting location of brake light switch -F- and brake pedal switch -F47-

Fitting location of clutch pedal switch -F36-

Fitting location of power assisted steering pressure switch -F88-

Fitting location of Motronic current supply relay -J271- and secondary air pump relay -J299- t  Beneath cover on left at bulkhead 1 -  Motronic current supply relay -J271- 2 -  Secondary air pump relay -J299-