Audi Workshop Service and Repair Manuals

Overview of fitting locations

t	Some components are located beneath the engine cover panel. For removal refer to → Fig..

t	Components “A” to “G” for vehicles with particulate filter are not shown in the diagram.

1 -	Unit injectors and glow plugs

q	Unit injector solenoid valve, No. 1 cyl. -N240-

q	Unit injector solenoid valve, No. 2 cyl. -N241-

q	Unit injector solenoid valve, No. 3 cyl. -N242-

q	Unit injector solenoid valve, No. 4 cyl. -N243-

q	Removing and installing unit injectors → Chapter

q	Glow plug 1 -Q10-

q	Glow plug 2 -Q11-

q	Glow plug 3 -Q12-

q	Glow plug 4 -Q13-

q	Different types of glow plugs → Chapter

q	Removing and installing metal glow plugs → Chapter

q	Removing and installing ceramic glow plugs → Chapter

Caution Due to the special properties of the material used, ceramic glow plugs are easily damaged and require extra care when handling and removing/installing.

2 -	Multi-pin connector

q	For unit injectors and glow plugs

q	Fitting location → Fig.

3 -	Coolant temperature sender -G62-

q	Fitting location → Fig.

q	Dissipate cooling system pressure before removal if necessary

4 -	Tandem pump

q	Removing, installing and checking → Rep. Gr.20

5 -	Fuel temperature sender -G81-

q	Fitting location → Fig.

6 -	Engine speed sender -G28-

q	Fitting location → Fig.

7 -	3-pin connector

q	For Hall sender -G40-

q	Fitting location → Fig.

8 -	Intake manifold flap motor -V157-

q	Fitting location → Fig.

9 -	Exhaust emissions warning lamp -K83-

q	In instrument cluster

10 -	Accelerator position sender -G79- with accelerator position sender 2 -G185-

q	Fitting location → Fig.

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

q	Fitting location → Fig.

12 -	Clutch pedal switch -F36-

q	Fitting location → Fig.

13 -	3-position relay and fuse holder behind dash panel (left-side)

q	With low heat output relay -J359-

q	With high heat output relay -J360-

q	Fitting location → Fig.

q	Not installed on vehicles with auxiliary heater.

14 -	Engine control unit -J623-

q	Fitting location → Fig.

q	Removing and installing → Chapter

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

q	With fuel pump relay -J17-

q	With terminal 30 voltage supply relay -J317-

q	With automatic glow period control unit -J179-

q	With engine glow plug strip fuse -S39-

q	Fitting location → Fig.

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

q	Fitting location → Fig.

17 -	Exhaust gas recirculation valve -N18-/exhaust gas recirculation potentiometer -G212-

q	Fitting location → Fig.

18 -	Hall sender -G40-

q	For camshaft position

q	Fitting location → Fig.

19 -	Solenoid valve for charge pressure control -N75-

q	Fitting location → Fig.

20 -	Exhaust gas recirculation cooler change-over valve -N345- and intake manifold flap valve -N316-

q	Intake manifold flap valve -N316- (only for engine code letters BRD, BVA)

q	Fitting location → Fig.

21 -	Air mass meter -G70-

A -	Lambda probe -G39- with Lambda probe heater -Z19- and temperature sender before particulate filter -G506-

q	Fitting location → Fig.

q	Removing and installing Lambda probe -G39- with Lambda probe heater -Z19- → Chapter

q	Removing and installing temperature sender before particulate filter -G506- → Rep. Gr.26

B -	Temperature sender after particulate filter -G527-

q	Fitting location → Fig.

q	Removing and installing → Rep. Gr.26

C -	Exhaust gas temperature sender 1 -G235-

q	Fitting location → Fig.

q	Removing and installing → Rep. Gr.26

D -	Electrical connectors on left side of bulkhead

q	For exhaust gas temperature sender 1 -G235-

q	For Lambda probe -G39-

q	Fitting location → Fig.

E -	Electrical connectors on right side of bulkhead and exhaust gas pressure sensor 1 -G450-

q	For exhaust gas pressure sensor 1 -G450-

q	For temperature sender before particulate filter -G506-

q	Fitting location → Fig.

F -	Electrical connections on gearbox (left-side)

q	For temperature sender after particulate filter -G527-

q	Fitting location → Fig.

G -	Position sender for charge pressure positioner -G581-

q	Depending on version

q	Fitting location → Fig.

Removing engine cover panel –  Pull off engine cover panel -arrows-.

Fitting location of engine control unit -J623- t  In electronics box (plenum chamber)

Fitting location of multi-pin connector for unit injectors and glow plugs t  To disconnect, pull release pin -arrow 1- and slacken knurled nut -arrow 2-.

Fitting location of accelerator position sender -G79-/accelerator position sender 2 -G185- t  In accelerator pedal module -arrow-.   Note The accelerator position sender -G79- and accelerator position sender 2- -G185- are integrated in the accelerator pedal module and cannot be renewed individually.

Fitting location of brake light switch -F- and brake pedal switch -F47-, clutch pedal switch -F36- 1 -  Brake light switch -F-, brake pedal switch -F47- 2 -  Clutch pedal switch -F36-   Note Switches must not be installed more than once, otherwise they may not fit securely.

Fitting locations in 4-slot relay carrier in plenum chamber electronics box 1.2 -  Fuel pump relay -J17- 2 -  Terminal 30 voltage supply relay -J317- 3 -  Automatic glow period control unit -J179- A -  Engine electronics fuse -S282- B -  Engine glow plug strip fuse -S39- C -  Engine control unit fuse -S102-

Fitting location of coolant temperature sender -G62- t  At rear of engine -arrow-.

Fitting location of fuel temperature sender -G81- t  At rear left in engine compartment -arrow-.

Fitting location of engine speed sender -G28- t  On flywheel side of engine. 1 -  Engine speed sender -G28- 2 -  Sender wheel

Fitting location of charge pressure sender -G31- with intake air temperature sender -G42- t  In charge air cooler at front left of engine compartment. 1 -  Air intake hose to intake manifold flap motor -V157- 2 -  Charge air pressure sender -G31- with intake air temperature sender -G42-

Fitting location of 3-pin connector for Hall sender -G40- t  On left of engine under intake manifold -arrow-.

Fitting location of Hall sender -G40- t  At front left of engine -arrow-.

Fitting location of intake manifold flap motor -V157- and exhaust gas recirculation valve -N18-/exhaust gas recirculation potentiometer -G212- 1 -  Exhaust gas recirculation valve -N18-/exhaust gas recirculation potentiometer -G212- 2 -  Intake manifold flap motor -V157-

Fitting location of solenoid valve for charge pressure control -N75- t  At front right of engine -arrow-.

Fitting location of exhaust gas recirculation cooler change-over valve -N345- and intake manifold flap valve -N316- 1 -  Intake manifold flap valve -N316- 2 -  Exhaust gas recirculation cooler change-over valve -N345-   Note Intake manifold flap valve -N316- is only fitted on vehicles with engine code letters BRD and BVA.

Fitting locations in 3-position relay and fuse holder behind dash panel (driver's side) 2 -  High heat output relay -J360- 3 -  Low heat output relay -J359-   Note Not installed on vehicles with auxiliary heater.

Fitting location of Lambda probe -G39- with Lambda probe heater -Z19- and temperature sender before particulate filter -G506- t  In particulate filter 1 -  Lambda probe -G39- with Lambda probe heater -Z19- 2 -  Temperature sender before particulate filter -G506-

Fitting location of temperature sender after particulate filter -G527- t  In exhaust pipe behind particulate filter -item 2-

Fitting location of exhaust gas temperature sender 1 -G235- t  In turbocharger -arrow-

Electrical connectors on left side of bulkhead 1 -  For exhaust gas temperature sender 1 -G235- 2 -  For Lambda probe -G39-

Electrical connectors on right side of bulkhead and exhaust gas pressure sensor 1 -G450- 1 -  For temperature sender before particulate filter -G506- 2 -  Exhaust gas pressure sensor 1 -G450-

Electrical connections on gearbox (left-side) 2 -  For temperature sender after particulate filter -G527- 3 -  Terminal 50   Note Disregard -item 1-.

Fitting location of position sender for charge pressure positioner -G581- t  On turbocharger -2-.   Note Disregard items marked -1- and -3-.