Audi Workshop Service and Repair Manuals

Overview of fitting locations (CCLA) Engine compartment (right-side)

1 -	Hall sender -G40-

q	Fitting location → Fig.

2 -	Pressure differential sender -G505-

q	Fitting location → Fig.

q	Adaption must be performed after renewing this component

q	Removing and installing → Chapter

3 -	Fuel pressure regulating valve -N276-

q	Fitting location → Fig.

q	After renewing high-pressure pump or fuel pressure regulating valve -N276-, learnt values must be re-adapted; see „Guided Functions“ in vehicle diagnostic tester

q	Removing and installing → Chapter

4 -	Electrical connector

For exhaust gas temperature sender 4 -G648-

5 -	Coolant temperature sender -G62-

q	Removing and installing → Rep. gr.19

6 -	Electrical connector for exhaust gas temperature sender 1 -G235-

q	Fitting location → Fig.

7 -	Control unit for turbocharger 1 -J724-

q	Fitting location → Fig.

8 -	Electrical connector for exhaust gas recirculation temperature sensor -G98-

q	Fitting location → Fig.

9 -	Exhaust gas temperature sender 3 -G495-

q	Fitting location → Fig.

10 -	Turbocharger

q	Removing and installing → Rep. gr.26

11 -	Intake manifold flap motor -V157-

q	Fitting location → Fig.

q	Cylinder bank 1

q	Intake manifold - exploded view → Chapter

12 -	NOx sender -G295-

q	Fitting location → Fig.

13 -	Lambda probe -G39-

q	Fitting location → Fig.

14 -	Electrical connector for exhaust gas temperature sender 3 -G495-

15 -	Intake manifold flap 2 motor -V275-

16 -	Exhaust gas recirculation temperature sensor -G98-

q	Fitting location → Fig.

q	Removing and installing → Rep. gr.26

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

q	Fitting location → Fig.

18 -	Exhaust gas recirculation control motor -V338-

q	Fitting location → Fig.

19 -	Fuel temperature sender -G81-

q	Fitting location → Fig.

20 -	Pressure retention valve

q	Fitting location → 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

21 -	High-pressure fuel pump

q	With fuel metering valve -N290-

q	After renewing high-pressure pump, first fuel filling operation MUST be performed (it is important not to allow pump to run while it is still empty) → Chapter

q	After renewing high-pressure pump or fuel pressure regulating valve -N276-, learnt values must be re-adapted; see „Guided Functions“ in vehicle diagnostic tester

q	High-pressure pump - exploded view → Chapter

q	Removing and installing → Chapter

22 -	Fuel metering valve -N290-

23 -	Oil pressure switch for reduced oil pressure -F378-

q	Fitting location → Fig.

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

24 -	Pump for exhaust gas recirculation cooler -V400-

q	Fitting location → Fig.

25 -	Control unit for NOx sender -J583-

q	Fitting location → Fig.

26 -	Radiator outlet coolant temperature sender -G83-

q	Fitting location → Fig.

27 -	Injectors (piezo injectors)

q	Cylinder bank 1

q	Removing and installing → Chapter

28 -	Air mass meter -G70-

q	Removing and installing → Chapter

29 -	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

q	Air cleaner - exploded view → Chapter

Engine compartment (left-side) Components A to K are not shown in the illustration.

1 -	Exhaust gas temperature sender 3 -G495-

q	Fitting location → Fig.

2 -	NOx sender -G295-

q	Fitting location → Fig.

3 -	Lambda probe -G39-

q	Fitting location → Fig.

4 -	Engine control unit -J623-

q	Fitting location → Fig.

q	Removing and installing → Chapter

5 -	Charge pressure sender -G31-

q	With intake air temperature sender -G42-

q	Fitting location → Fig.

q	Removing and installing → Rep. gr.21

6 -	Throttle valve module -J338-

q

9 Nm

7 -	Injectors (piezo injectors)

q	Cylinder bank 2

q	Removing and installing → Chapter

8 -	Fuel pressure sender -G247-

q	Fitting location → Fig.

q	Removing and installing → Chapter

9 -	Connector for Lambda probe -G39-

q	Fitting location → Fig.

10 -	High-pressure fuel pump

q	With fuel metering valve -N290-

q	After renewing high-pressure pump, first fuel filling operation MUST be performed (it is important not to allow pump to run while it is still empty) → Chapter

q	After renewing high-pressure pump or fuel pressure regulating valve -N276-, learnt values must be re-adapted; see „Guided Functions“ in vehicle diagnostic tester

q	High-pressure pump - exploded view → Chapter

q	Removing and installing → Chapter

11 -	Fuel metering valve -N290-

12 -	Exhaust gas recirculation control motor -V338-

q	Fitting location → Fig.

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

q	Fitting location → Fig.

14 -	Exhaust gas recirculation temperature sensor -G98-

q	Fitting location → Fig.

q	Removing and installing → Rep. gr.26

15 -	Electrical connector for exhaust gas temperature sender 3 -G495-

16 -	Intake manifold flap 2 motor -V275-

A -	Relay and fuse holder in electronics box in plenum chamber (left-side)

q	Removing and installing engine control unit -J623- with altitude sensor → Chapter

q	Fitting locations → Current flow diagrams, Electrical fault finding and Fitting locations

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

q	Fitting locations → Current flow diagrams, Electrical fault finding and Fitting locations

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

q	In footwell on brake pedal

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

q	Fitting location → Fig.

q	Removing and installing → Rep. gr.20

E -	Exhaust gas temperature sender 1 -G235-

q	On turbocharger

q

45 Nm

q	Removing and installing → Rep. gr.26

F -	Engine speed sender -G28-

q	Fitting location → Fig.

G -	Supplementary fuel pump -V393-

q	Fitting location → Fig.

q	Removing and installing → Rep. gr.20

H -	Oil pressure switch -F22-

q	Fitting location → Fig.

q	Removing and installing → Rep. gr.17

I -	Valve for oil pressure control -N428-

q	Fitting location → Fig.

q	Removing and installing → Rep. gr.17

J -	Glow plugs

q	Glow plug 1 -Q10-

q	Glow plug 2 -Q11- with cylinder 2 combustion chamber pressure sender -G678-

q	Glow plug 3 -Q12-

q	Glow plug 4 -Q13-

q	Glow plug 5 -Q14- with cylinder 5 combustion chamber pressure sender -G681-

q	Glow plug 6 -Q15-

q	Removing and installing → Chapter

K -	Particulate filter

q	Fitted on underbody

q	Combined with a catalytic converter

q	Adaption must be performed after renewing this component

q	Removing and installing → Rep. gr.26

After renewing exhaust gas pressure sensor 1 -G450- and/or particulate filter, adaption must be performed in order to reset learnt values. The adaption procedure is described in the Guided Fault Finding or Guided Functions; use a vehicle diagnostic tester.

Fitting location of engine control unit -J623- t  In left electronics box in engine compartment

Accelerator position sender -G79- and accelerator position sender 2 -G185-   Note The accelerator position sender -G79- and accelerator position sender 2 -G185- are integrated in the accelerator pedal module and cannot be renewed individually.

Fuel pressure sender -G247--1- on cylinder bank 2 (left-side)

Hall sender -G40--1- on cylinder bank 1 (right-side)

Fuel pressure regulating valve -N276--1-

Components on cylinder bank 1 (right-side) 1 -  Fuel temperature sender -G81- 2 -  Radiator outlet coolant temperature sender -G83- 3 -  Pressure retention valve in fuel return line

Fitting locations 1 -  Electrical connector for exhaust gas recirculation temperature sensor -G98- 2 -  Electrical connector for exhaust gas temperature sender 1 -G235- 3 -  Electrical connector for exhaust gas temperature sender 3 -G495- 4 -  Exhaust gas recirculation cooler change-over valve -N345- 5 -  Exhaust gas recirculation temperature sensor -G98- 6 -  Exhaust gas recirculation control motor -V338-

Pump for exhaust gas recirculation cooler -V400--1-

Fitting locations (front right) 1 -  Control unit for NOx sender -J583- 2 -  Pump for exhaust gas recirculation cooler -V400-

Oil pressure switch for reduced oil pressure -F378--1-

Oil pressure control 1 -  Oil pressure switch -F22- 2 -  Valve for oil pressure control -N428-

Charge pressure sender -G31- with intake air temperature sender -G42--1-

Fitting locations 1 -  Exhaust gas temperature sender 3 -G495- 2 -  NOx sender -G295- 3 -  Lambda probe -G39- 4 -  Connector for Lambda probe -G39- 5 -  Electrical connector for exhaust gas temperature sender 3 -G495-

Fitting locations 1 -  Pressure differential sender -G505- 2 -  Electrical connector for exhaust gas temperature sender 4 -G648- 3 -  Control unit for turbocharger 1 -J724- 4 -  Intake manifold flap motor -V157- 5 -  Electrical connector for exhaust gas temperature sender 1 -G235- 6 -  Electrical connector for exhaust gas recirculation temperature sensor -G98-

Exhaust gas temperature sender 1 -G235--arrow-

Engine speed sender -G28--2-

Supplementary fuel pump -V393--3- 1 -  Electrical connector for supplementary fuel pump -V393- 2 -  Fuel filter 3 -  Supplementary fuel pump -V393- 4 -  Preheating valve   Note -Arrow- points in direction of travel.

Control unit for NOx sender 2 -J881--1- Underneath cover for active tank, in front of rear left wheel