Audi Workshop Service and Repair Manuals

Overview of fitting locations Components A to L are not shown on the exploded view.

1 -	Air mass meter -G70-

q

→ Fig.

q	Removing and installing → Chapter

2 -	Fuel filter

q	Renewing → Rep. gr.20

3 -	Hall sender -G40- (camshaft position sensor)

q	Fitting location → Fig.

4 -	Coolant temperature sender -G62-

q	Removing and installing → Rep. gr.19

5 -	Fuel pressure regulating valve -N276-

q	Fitting location → Fig. „„Fuel pressure regulating valve -N276--1-““

q	Removing and installing → Chapter

6 -	Connector for exhaust gas temperature sender 1 -G235-

7 -	Intake manifold flap motor -V157-

q	Cylinder bank 1

q	Removing and installing → Chapter

q	Intake manifold - exploded view → Chapter

8 -	Control unit for turbocharger 1 -J724-

q	Removing and installing → Rep. gr.21

9 -	Exhaust gas temperature sender 1 -G235-

q	On turbocharger

q	Removing and installing → Rep. gr.26

10 -	Lambda probe -G39- with Lambda probe heater -Z19-

q	Removing and installing → Chapter

11 -	Exhaust gas recirculation cooler change-over valve -N345-

q	Fitting location → Fig.

q	Overview of exhaust gas recirculation system → Rep. gr.26

12 -	Intake manifold flap 2 motor -V275-

q	Cylinder bank 2

q	Removing and installing → Chapter

q	Intake manifold - exploded view → Chapter

13 -	Connector for Lambda probe -G39-

q	Fitting location → Fig.

14 -	Throttle valve module -J338-

15 -	Injectors (piezo injectors)

q	Cylinder bank 2

q	Removing and installing → Chapter

16 -	Fuel pressure sender -G247-

q	Removing and installing → Chapter

17 -	Vacuum unit

q	For change-over flap for exhaust gas recirculation cooler

18 -	Mechanical exhaust gas recirculation valve

q	Overview of exhaust gas recirculation system → Rep. gr.26

q	Removing and installing → Rep. gr.26

19 -	High-pressure fuel pump

q	With gear-type fuel system pressurisation pump

q	With fuel metering valve -N290-

q	High-pressure pump generates fuel pressure up to 1600 bar

q	Gear-type fuel system pressurisation pump generates fuel pressure between 4 and 5 bar

q	Exploded view: vehicles up to 09.2005 → Chapter; vehicles from 09.2005 onwards → Chapter

q	Removing and installing: vehicles up to 09.2005 → Chapter; vehicles from 09.2005 onwards → Chapter

20 -	Fuel supply line connection

21 -	Fuel return line connection

22 -	Fuel metering valve -N290-

q	Do not unscrew

q	Screwed directly into high-pressure fuel pump

23 -	Exhaust gas recirculation valve -N18-

q	Fitting location → Fig.

24 -	Oil pressure switch -F1-

q

→ Fig.

q	Removing, installing and testing → Rep. gr.17

25 -	Fuel temperature sender -G81-

q	Fitting location → Fig.

26 -	Pressure retention valve

q

→ Fig.

q	In return lines from cylinder banks 1 and 2

q	The pressure retention valve maintains a residual pressure of approx. 10 bar in the return lines.

q	This residual pressure is required for the control function of the piezo injectors.

q	The pressure retention valve may only be renewed together with the fuel return lines.

q	After replacement, engine must be run at idling speed for approx. 2 minutes to bleed fuel system

q	Checking pressure retention valve → Chapter

27 -	Injectors (piezo injectors)

q	Cylinder bank 1

q	Removing and installing → Chapter

A -	Electronics box in plenum chamber

q	Engine control unit -J623- with altitude sender

q	Removing and installing → Chapter

q	Fuel pump relay -J17- → Fig.

q	Starter inhibitor relay -J207- → Fig.

q	Terminal 30 voltage supply relay -J317- → Fig.

q	Automatic glow period control unit -J179- → Fig.

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

q	In footwell on brake pedal

C -	Accelerator position sender -G79- and accelerator position sender 2 -G185-

q	In footwell on accelerator pedal

q	On vehicles with automatic gearbox the function of the kick-down switch must be re-adapted if this part is renewed.

q	Refer to Guided Fault Finding or → Rep. gr.20 for adapting kick-down function

D -	Charge pressure sender -G31-

q	With intake air temperature sender -G42-

q	In charge air cooler (left-side) → Fig.

q	Removing and installing → Rep. gr.21

E -	Starter motor relay -J53- and starter motor relay 2 -J695-

q	For fitting location refer to → Current flow diagrams, Electrical fault finding and Fitting locations

F -	Engine speed sender -G28-

q	Fitting location → Fig.

G -	Low heat output relay -J359- and high heat output relay -J360-

q	Fitting location in 3-position relay carrier → Current flow diagrams, Electrical fault finding and Fitting locations

H -	Air filter bypass flap valve -N275-

q	These components (bypass flap with air filter bypass flap valve -N275-) are not installed on certain equipment versions or on vehicles for certain export markets

q	If fitted, the bypass flap is located in the air cleaner housing and the air cleaner bypass flap valve -N275- is located on the outside of the air cleaner housing

I -	Exhaust gas temperature sender 2 for cylinder bank 1 -G448-

q	Only fitted on vehicles with particulate filter

q	Located downstream of starter catalytic converter

q	For fitting location refer to → Fig.

q	Removing and installing → Rep. gr.26

J -	Temperature sender before particulate filter -G506-

q	Only fitted on vehicles with particulate filter

q	Located between main catalytic converter and particulate filter

q	For fitting location refer to → Fig.

q	Removing and installing → Rep. gr.26

K -	Exhaust gas pressure sensor 1 -G450-

q	Only fitted on vehicles with particulate filter

q	Adaption must be performed after renewing this component

q	Removing and installing → Chapter

L -	Particulate filter

q	Fitted on vehicle underbody

q	Combined as one component with main catalytic converter (located upstream)

q	Adaption must be performed after renewing this component

q	Removing and installing → Rep. gr.26

Adaption must be performed after renewing exhaust gas pressure sensor 1 -G450- and/or particulate filter. (The procedure is described under Guided Functions.) Select correct vehicle identification in Guided Fault Finding. –  Press „Go to“ button. –  Press „Function/component selection“. –  Select „Drive train“. –  „01 - Self-diagnosis compatible systems“ –  „01 - Engine electronics“ –  Select „01 - Functions“. –  „01 - J623 Adapt particulate filter learned values“

4-position relay carrier in electronics box (plenum chamber) 1.1 -  Fuel pump relay -J17- 1.2 -  Starter inhibitor relay -J207- 2 -  Terminal 30 voltage supply relay -J317- 3 -  Automatic glow period control unit -J179-

Air mass meter -G70--1-

Hall sender -G40--1- on cylinder bank 1

Fuel pressure regulating valve -N276--1-

Fuel temperature sender -G81--1- and pressure retention valve -2-

Exhaust gas recirculation cooler change-over valve -N345--1-

Exhaust gas recirculation valve -N18-

Connector for Lambda probe -G39-

Exhaust gas temperature sender 2 for cylinder bank 1 -G448--arrow-

Temperature sender before particulate filter -G506--item 1- 2 -  Electrical connector for temperature sender before particulate filter -G506-

Oil pressure switch -F1- t  Removing, installing and testing → Rep. gr.17

Charge pressure sender -G31- with intake air temperature sender -G42- in charge air cooler t  Removing and installing → Rep. gr.21

Engine speed sender -G28- in gearbox housing above starter ring gear