2.5l - Multiport Fuel Injection - Engine Code(s): Cepb (coupe) Audi TT 8J рестайлинг

CLEAN WORKING CONDITIONS

Even a little contamination can lead to faults. When working on the fuel supply and on the fuel injection system, observe the following guidelines for a clean working environment

1. Before loosening, connections and surrounding areas must be cleaned thoroughly with engine or brake cleaner, and then cleaned area must be dried completely.
2. Plug open lines and connections immediately with appropriate protective caps.
3. Place removed parts on a clean surface and cover them. Use lint-free cloths.
4. Carefully cover over opened components or seal, if repairs are not performed immediately.
5. Only install clean components: Remove the replacement parts from their packaging just prior to installing them. Do not use parts that have been stored loose (for example in tool boxes etc.).
6. When the system is open: Do not work with compressed air. Do not move vehicle unless absolutely necessary.
7. Protect the disconnected connectors from dirt and moisture and only connect them when they are dry.

ON BOARD DIAGNOSTICS

1. The engine control module is equipped with On Board Diagnostics (OBD). Before repairs such as fault finding, check the DTC memory first. Also the vacuum hoses and connections must be checked (unmetered air).
2. Fuel hoses in engine compartment must only be secured with spring-type clips. The use of clamp or screw type clips is not permissible.
3. For the electric components to work properly, a voltage of at least 11.5 Volts is required.
4. Do not use sealants containing silicone. Traces of silicone components which are sucked into the engine are not burned there, and they damage the oxygen sensors.
5. The vehicles have a crash fuel shut-off. This is intended to reduce the risk of vehicle fire following a crash by switching off the Fuel Pump (FP) via the Fuel Pump (FP) Control Module.

FUEL SYSTEM

Disconnect the battery. Refer to [For transmission(s) 02E] Removal and Installation .

IGNITION SYSTEM

To reduce the risk of personal injury and/or damage to the fuel injection and ignition system, always observe the following

Scheme 285

1. Individuals with a pacemaker must not stay in the danger area of high voltage systems, for example ignition system, xenon light.
2. Fuel lines must not be opened when the engine is running.
3. Only disconnect and reconnect wires for injection and ignition system, including test leads, when ignition is switched off.
4. It is possible that the control module will recognize a malfunction and store a DTC during some tests. After completing all checks and repairs, check the DTC memory and erase the memory, if necessary.
5. If the DTC memory was erased, a new readiness code must be generated.
6. Cleaning the engine should only be performed with ignition switched off.
7. If the engine is to be cranked at starting RPM without starting (for example, for a compression test), disconnect the four ignition coil connectors.
8. Disconnect the connector -arrow- from the fuel injectors.

RELEASING PRESSURE IN HIGH PRESSURE AREA

High Fuel Pressure, Reducing

Connect a vehicle diagnosis tester.

Start the engine and run at idle speed.

Select "engine electronics" in OBD.

Then select "Measured values" read out.

Select measured value block 140.

With the engine is running at idle, the fuel pressure will be displayed in the display field 3.

Remove the fuse from the Fuel Pump (FP) control module -J538- with the engine idling. Refer to Wiring Diagram.

Note. By removing the fuse, the voltage supply to terminal 30 for the FP control module is interrupted.

Check the fuel pressure on the diagnostic system.

1. The fuel pressure decreases rapidly because the mechanical high pressure pump is no longer supplied with fuel by the fuel pump -G23-.

Switch the ignition off as soon as the fuel pressure drops to approximately 8 bar.

Note. The fuel pressure must not drop below 6 bar, because otherwise the engine will shut off (risk of catalytic converter damage).

After reducing the fuel pressure, place a clean cloth around the connection and open the high pressure system immediately. Escaping fuel must be absorbed.

Note. If the high pressure system is not opened immediately, the pressure will increase because of post-heating.

Final Procedures

Install the fuse.

Erase the DTC memory and generate the readiness code in the engine control module in "Guided Functions".

TEST AND MEASURING INSTRUMENTS DURING TEST DRIVE

If special testing equipment is required during road test, note the following

Scheme 286

Scheme 287

1. Front Air Guide Clean off dirt, leaves and salt residue
2. Clip Nut
3. Bolt 1.5 Nm
4. Air Guide Lower Section Clean off dirt, leaves and salt residue
5. Air Duct Cover
6. Bolt 5 Nm
7. Hose For crankcase ventilation
8. Air Guide Hose
9. Bolt 3 Nm
10. Air Guide Pipe
11. Seal Replace if damaged
12. Air Filter Upper Section Clean off dirt, leaves and salt residue.
13. Air Filter Always use an original air filter Removing and installing, refer to «AIR FILTER»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__air-filter) Observe change intervals, refer to the Maintenance Procedures.
14. Bolt 10 Nm With permanent rubber grommet
15. Bracket For the air filter housing
16. Bolt 10 Nm With permanent rubber grommet
17. Water Drain Clean
18. Retaining Pin 10 Nm
19. Rubber Grommet
20. Air Filter Housing Lower Section Clean off dirt, leaves and salt residue. Removing and installing, refer to «AIR FILTER HOUSING»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__air-filter-housing)
21. Gasket Fastened inside the air filter housing lower section

COMPONENT LOCATION OVERVIEW

Engine Intake Side

Scheme 288

1. Intake Manifold Runner Control Valve -N316
2. Low Fuel Pressure Sensor -G410- 10 Nm
3. Cylinder 2 Fuel Injector -N31- Removing and installing, refer to «FUEL INJECTORS»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__fuel-injectors)
4. Cylinder 1 Fuel Injector -N30
5. Camshaft Position (CMP) Sensor -G40- Intake side Removing and installing, refer to «Camshaft Position Sensor -G40- / Camshaft Position Sensor 3 -G300»(/audi/tt/8j-2010-2014/remont/ignition-system/#25l-ignitionglow-plug-system-engine-codes-cepb-coupe__camshaft-position-sensor-g40-camshaft) 9 Nm
6. Ignition Coil 1 with Power Output Stage -N70- Removing and installing, refer to «IGNITION COILS»(/audi/tt/8j-2010-2014/remont/ignition-system/#25l-ignitionglow-plug-system-engine-codes-cepb-coupe__ignition-coils)
7. Ignition Coil 2 with Power Output Stage -N127
8. Ignition Coil 3 with Power Output Stage -N291
9. Ignition Coil 4 with Power Output Stage -N292
10. Ignition Coil 5 with Power Output Stage -N323
11. Camshaft Adjustment Valve 1 -N205- 2.5 Nm Installed location (Scheme 298)Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/mechanical/#25l-cylinder-head-valvetrain-engine-codes-cepb-coupe)
12. Intake Air Temperature (IAT) Sensor -G42- /Manifold Absolute Pressure (MAP) Sensor -G71- Removing and installing, refer to «INTAKE AIR TEMPERATURE SENSOR AND MANIFOLD ABSOLUTE PRESSURE SENSOR»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__intake-air-temperature-sensor-and-manifold)
13. Intake Manifold Runner Position Sensor -G336- After replacing, perform an "Adaptation" in "Guided Fault Finding" under "Adapting position sensor for channel separating plates"
14. Charge Air Pressure Sensor -G31- /Intake Air Temperature (IAT) Sensor 2 -G299- Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/blowers-superchargers-turbochargers/#25l-turbocharger-supercharger-engine-codes-cepb-coupe)
15. Throttle Valve Control Module -J338- With Electronic Power Control (EPC) throttle drive -G186-, EPC throttle drive angle sensor 1 -G187- and EPC throttle drive angle sensor 2 -G188- Removing and installing, refer to «Throttle Valve Control Module -J338»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__throttle-valve-control-module-j338) After replacing, perform an "Adaptation" in "Guided Functions"
16. Cylinder 5 Fuel Injector -N83
17. Fuel Pressure Sensor -G247- Removing and installing, refer to «Fuel Pressure Sensor -G247»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__fuel-pressure-sensor-g247)
18. Cylinder 4 Fuel Injector -N33
19. Oil Pressure Switch -F1- from approximately 27 September 2010 Oil Pressure Switch -F22- Component location (Scheme 301)Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/lubrication-system/#25l-lubrication-engine-codes-cepb-coupe)
20. Oil Pressure Regulation Valve -N428- Component location (Scheme 301)Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/lubrication-system/#25l-lubrication-engine-codes-cepb-coupe)
21. Reduced Oil Pressure Switch -F378- Component location (Scheme 301)Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/lubrication-system/#25l-lubrication-engine-codes-cepb-coupe)
22. Evaporative Emission (EVAP) Canister Purge Regulator Valve 1 -N80
23. Cylinder 3 Fuel Injector -N32

Engine Exhaust Side

Scheme 289

1. Engine Speed (RPM) Sensor -G28- Removing and installing, refer to «Engine Speed Sensor -G28»(/audi/tt/8j-2010-2014/remont/ignition-system/#25l-ignitionglow-plug-system-engine-codes-cepb-coupe__engine-speed-sensor-g28)
2. Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC) -G130- with Heater for Oxygen Sensor (O2S) 1 after Catalytic Converter -Z29- Connector location (Scheme 294)Removing and installing, refer to «Oxygen Sensor after Three Way Catalytic Converter -G130- WITH Heater for Oxygen Sensor 1 after Catalytic Converter -Z29»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__oxygen-sensor-after-three-way-catalytic)
3. Coolant Temperature Sensor -G62- Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/cooling-fan/#25l-cooling-system-engine-codes-cepb-coupe)
4. Turbocharger Recirculating Valve -N249- Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/blowers-superchargers-turbochargers/#25l-turbocharger-supercharger-engine-codes-cepb-coupe)
5. Exhaust Camshaft Adjustment Valve 1 -N318- Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/mechanical/#25l-cylinder-head-valvetrain-engine-codes-cepb-coupe)
6. Fuel Metering Valve -N290- One unit with high pressure pump Cannot be replaced individually
7. Camshaft Position (CMP) Sensor 3 -G300- Exhaust side Removing and installing, refer to «Camshaft Position Sensor -G40- / Camshaft Position Sensor 3 -G300»(/audi/tt/8j-2010-2014/remont/ignition-system/#25l-ignitionglow-plug-system-engine-codes-cepb-coupe__camshaft-position-sensor-g40-camshaft)
8. Exhaust Gas Temperature (EGT) Sensor 1 -G235- Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/exhaust/#25l-exhaust-system-emission-controls-engine-codes-cepb-coupe)
9. Wastegate Bypass Regulator Valve -N75
10. Heated Oxygen Sensor (HO2S) -G39- before Catalytic Converter with Oxygen Sensor (O2S) Heater -Z19- Connector location (Scheme 294)Removing and installing, refer to «Heated Oxygen Sensor (HO2S) -G39- WITH Oxygen Sensor (O2S) Heater -Z19»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__heated-oxygen-sensor-ho2s-g39-with)
11. Knock Sensor (KS) 1 -G61- Connector location (Scheme 295)Removing and installing, refer to «Knock Sensors -G61- / Knock Sensors 2 -G66»(/audi/tt/8j-2010-2014/remont/ignition-system/#25l-ignitionglow-plug-system-engine-codes-cepb-coupe__knock-sensors-g61-knock-sensors)
12. Knock Sensor (KS) 2 -G66- Connector location (Scheme 295)Removing and installing, refer to «Knock Sensors -G61- / Knock Sensors 2 -G66»(/audi/tt/8j-2010-2014/remont/ignition-system/#25l-ignitionglow-plug-system-engine-codes-cepb-coupe__knock-sensors-g61-knock-sensors)

Scheme 290

1. In E-box, plenum chamber.
2. Removing and installing, refer to «Engine Control Module -J623»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__engine-control-module-j623) .

Scheme 291

1. One unit with accelerator pedal module.
2. Removing and installing accelerator pedal module. Refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/fuel-system/#fuel-supply-system-coupe) .

Scheme 292

1. Brake lamp switch -F-, brake pedal switch -F47

1. On the master brake cylinder.
2. Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/mechanical-hydraulic/#hydraulic-components-brake-system-coupe) .

Scheme 293

1. On clutch master cylinder -arrow-.
2. Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/clutches-manual-hydraulic/#clutch-manual-transmission-0a6-awd-coupe) or refer to «Removal and Installation»(ref-505646-S42923348962012100100000) .

Scheme 294

1. For Heated Oxygen Sensor (HO2S) -G39- before catalytic converter with Oxygen Sensor (O2S) heater -Z19
2. For Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC) -G130- with Heater for Oxygen Sensor (O2S) 1 after catalytic converter -Z29

1. On the plenum chamber bulkhead

Scheme 295

1. For Knock Sensor (KS) 2 -G66
2. For Knock Sensor (KS) 1 -G61

1. On the cylinder head cover

Scheme 296

1 - For the RPM sensor

3 - For fuel injectors

Scheme 297

2 - FP control module

3 - Bracket

1. On the underbody in front of the fuel tank

Scheme 298

Scheme 299

2

After-run coolant pump

1. On the cylinder block, intake side

Scheme 300

1. Cooling circuit solenoid valve

1. On the cylinder block, intake side

Scheme 301

2 - Reduced oil pressure switch -F378

4 - Oil pressure switch -F22

5 - Oil pressure regulation valve -N428

Scheme 302

1. High-Pressure Line WARNING: There is a risk of injury because the fuel is under high pressure. Let the fuel pressure come down before opening any high pressure components in the fuel injection system. Reduce the fuel pressure in the high pressure area. Refer to «RELEASING PRESSURE IN HIGH PRESSURE AREA»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__releasing-pressure-in-high-pressure-area) . Illustration does not correspond to version in vehicle Tighten the connection to 40 Nm. Check the line torque every time before installing the fuel line. Connectors should not show any signs of damage Do not change the shape of the line Lubricate the threads lightly Removing and installing, refer to «HIGH PRESSURE PIPE»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__high-pressure-pipe)
2. Bolt 9 Nm
3. Union Nut 27 Nm Connectors should not show any signs of damage
4. High Pressure Pump Removing and installing, refer to «HIGH PRESSURE PUMP»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__high-pressure-pump)
5. Bolt 20 Nm
6. Seal Replace
7. Drain Plug 15 Nm Replace
8. O-ring Replace
9. Roller Tappet
10. Union Nut 27 Nm Connectors should not show any signs of damage
11. Fuel Supply Line

Scheme 303

1. Bolt 9 Nm
2. High Pressure Pipe 27 Nm WARNING: There is a risk of injury because the fuel is under very high pressure. Let the fuel pressure come down before opening any high pressure components in the fuel injection system. Reduce the fuel pressure in the high pressure area. Refer to «RELEASING PRESSURE IN HIGH PRESSURE AREA»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__releasing-pressure-in-high-pressure-area) . Connectors should not show any signs of damage Do not change the shape of the line Install the high pressure pipe. Refer to «HIGH PRESSURE PIPE»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__high-pressure-pipe) .
3. Threaded Connection 27 Nm
4. Fuel Rail Removing and installing, refer to «INTAKE MANIFOLD, LOWER SECTION, WITH FUEL RAIL»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__intake-manifold-lower-section-with-fuel)
5. Bracket
6. Bolt 9 Nm
7. Bolt 9 Nm
8. Intake Manifold Lower Section With intake manifold flap vacuum actuator Removing and installing, refer to «INTAKE MANIFOLD, LOWER SECTION, WITH FUEL RAIL»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__intake-manifold-lower-section-with-fuel)
9. Mounting Pin
10. Vacuum Actuator
11. Bolt 9 Nm
12. Gasket Replace
13. Fitting Pin
14. Seal
15. Washer
16. Intake Manifold Runner Position Sensor -G336- After replacing, perform an "Adaptation" in "Guided Fault Finding" under "Adapting position sensor for channel separating plates"
17. Bolt 2.5 Nm
18. Bolt 9 Nm
19. Upper Sealing Washer
20. Lower Sealing Washer
21. Locking Ring
22. Combustion Chamber Seal Do not grease ring or treat with any other lubricant Removing and installing, refer to «FUEL INJECTORS»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__fuel-injectors)
23. Fuel Injector Removing and installing, refer to «FUEL INJECTORS»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__fuel-injectors)
24. Spacer Ring Replace if damaged
25. O-ring Replace Coat with clean engine oil
26. Support Ring Replace The fuel rail wields force via the support ring to hold the fuel injector tightly in the cylinder head. Clipped to -23
27. Fuel Pressure Sensor -G247- 27 Nm Removing and installing, refer to «Fuel Pressure Sensor -G247»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__fuel-pressure-sensor-g247)

Scheme 304

Tighten the bolts and nuts on the intake manifold lower section in 2 steps in the following sequence: -1 through 11-.

1. First tightening: 7 Nm
2. Second tightening: 9 Nm

Scheme 305

1. Gasket Replace
2. Throttle Valve Control Module -J338- Removing and installing, refer to «Throttle Valve Control Module -J338»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__throttle-valve-control-module-j338) After replacing, perform an "Adaptation" in "Guided Functions"
3. Non-Return Valve
4. Bolt 9 Nm
5. Evaporative Emission (EVAP) Canister Purge Regulator Valve 1 -N80
6. Bracket
7. Bolt 9 Nm
8. Intake Manifold Upper Section Removing and installing, refer to «INTAKE MANIFOLD, UPPER SECTION»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__intake-manifold-upper-section)
9. Bolt Tightening specification and sequence (Scheme 306)
10. Gasket Replace
11. Hose For crankcase ventilation
12. O-ring Replace
13. O-ring Replace
14. Intake Air Temperature (IAT) Sensor -G42- /Manifold Absolute Pressure Sensor -G71- Removing and installing, refer to «INTAKE AIR TEMPERATURE SENSOR AND MANIFOLD ABSOLUTE PRESSURE SENSOR»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__intake-air-temperature-sensor-and-manifold)
15. Bolt 9 Nm
16. Gasket Replace
17. Threaded Piece 20 Nm Install with locking compound; for the correct locking compound refer to the Electronic Parts Information.
18. Intake Tube
19. Bolt 9 Nm
20. O-ring Replace
21. Turbocharger Recirculating Valve -N249- Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/blowers-superchargers-turbochargers/#25l-turbocharger-supercharger-engine-codes-cepb-coupe)
22. Bolt 9 Nm
23. O-ring Replace
24. Charge Air Pressure Sensor -G31- /Intake Air Temperature (IAT) Sensor 2 -G299- Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/blowers-superchargers-turbochargers/#25l-turbocharger-supercharger-engine-codes-cepb-coupe)
25. Bolt 9 Nm

Scheme 306

Tighten intake manifold bolts in sequence -1 through 5-.

1. First tightening: Install all the way in by hand.
2. Second tightening: 9 Nm

Scheme 307

1. Electrical Harness Connector For Exhaust Gas Temperature (EGT) sensor 1 -G235
2. Bolts 5 Nm
3. Oxygen Sensor (O2S) after Three Way Catalytic Converter -G130- with Heater for Oxygen Sensor 1 after Catalytic Converter -Z29- 55 Nm Removing and installing, refer to «Oxygen Sensor after Three Way Catalytic Converter -G130- WITH Heater for Oxygen Sensor 1 after Catalytic Converter -Z29»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__oxygen-sensor-after-three-way-catalytic)
4. Heated Oxygen Sensor (HO2S) -G39- with Oxygen Sensor (O2S) Heater -Z19- 55 Nm Removing and installing, refer to «Heated Oxygen Sensor (HO2S) -G39- WITH Oxygen Sensor (O2S) Heater -Z19»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe__heated-oxygen-sensor-ho2s-g39-with)
5. Turbocharger
6. Exhaust Gas Temperature (EGT) Sensor 1 -G235- Removing and installing, refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/exhaust/#25l-exhaust-system-emission-controls-engine-codes-cepb-coupe)
7. Primary Catalytic Converter

Note. New oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body. For a used oxygen sensor, only coat threads with hot bolt paste. This paste must not come into contact with oxygen sensor slots. Hot bolt paste. Electrical wire of the oxygen sensor must always be secured in the same position when installing so that contact with the exhaust pipe is avoided.

FASTENER TIGHTENING SPECIFICATIONS

Intake Manifold Lower Section - Tightening Specification and Tightening Sequence

Tighten the bolts and nuts on the intake manifold lower section in 2 steps in the following sequence: -1 through 11-.

1. First tightening: 7 Nm
2. Second tightening: 9 Nm

Intake Manifold Lower Section - Tightening Specification and Tightening Sequence

Tighten the bolts and nuts on the intake manifold lower section in 2 steps in the following sequence: -1 through 11-.

1. First tightening: 7 Nm
2. Second tightening: 9 Nm

Intake Manifold Upper Section Tightening Specification and Sequence

Tighten intake manifold bolts in sequence -1 through 5-.

1. First tightening: Install all the way in by hand.
2. Second tightening: 9 Nm

FUEL PRESSURE AND RESIDUAL PRESSURE BEFORE HIGH PRESSURE PUMP, CHECKING

Special tools and workshop equipment required

1. Fuel Inj. Pressure Gauge-CIS V.A.G 1318
2. Adapter V.A.G 1318/11
3. Adapter V.A.G 1318/17A
4. Fuel Line Feed Adapter V.A.G 1318/23
5. Remote Control Connection V.A.G 1348/3A with Remote Control for VAG 1348 V.A.G 1348/3-3
6. Connector Test Set V.A.G 1594C
7. Measuring container, fuel-resistant

Test Conditions

1. Battery voltage at least 12.5 Volts.
2. Fuel filter OK.
3. Fuel tank minimum 1 / 4 full.
4. Fuel Pump (FP) control module -J538- OK; checking
5. Ignition switched off

Fuel Pressure, Checking

TT Coupe: Remove the rear bench seat. Refer to Removal and Installation .

TT Roadster: Remove the right rear panel trim panel. Refer to Trim, Roadster in Removal and Installation .

Unclip the retainers -arrows- of the cover for sealing flange.

Scheme 308

Disconnect the connector -arrow- from the locking flange.

Scheme 309

Connect the V.A.G 1348/3A with V.A.G 1348/3-3 with an adapter cable from V.A.G 1594C at terminal -1-.

Scheme 310

Cover the second connector terminal of the V.A.G 1348/3-3 with insulating tape to prevent short circuit -arrow-.

Connect contact -5- to vehicle Ground (GND) using a jumper cable from the V.A.G 1594C.

Connect the alligator clamp to the battery positive (positive terminal inside the engine compartment).

Remove the fuel cap from the fuel filler tube.

Disengage the fuel supply line from the bracket and remove the heat shield boot -1-.

Scheme 311

Remove the release ring -2- and disconnect the fuel supply line -3-.

Seal off all open lines and connections with clean plugs.

Attach the V.A.G 1318/23 and V.A.G 1318/17A to the V.A.G 1318.

Scheme 312

Mount the V.A.G 1318/17A on the pull-off fuel supply line.

Attach V.A.G 1318/11 to the V.A.G 1318.

Push an assisting hose -arrow- onto it and hold it into a measuring container.

Open shut-off valve on the pressure gauge.

1. The lever points in the direction of flow.

Press remote control switch until pressure increase is no longer observed on V.A.G 1318.

1. Specified value: approximately 6 bar (4 to 8 bar) positive pressure

If the specified value is not reached, check the fuel pump delivery rate. Refer to Diagnosis and Testing .

Residual Pressure, Checking

Check for leaks and residual pressure by watching for the pressure on the V.A.G 1318 to decrease.

1. After 10 minutes there must be a residual pressure of at least 3.0 bar.

If the holding pressure drops below 3 bar

1. Check the threaded connection between the V.A.G 1318 and the fuel supply line for leaks.
2. Check the V.A.G 1318 for leaks.
3. Check fuel lines and their connections for leaks.
4. Replace the fuel filter with an integrated fuel pressure regulator. Refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/fuel-system/#fuel-supply-system-coupe) .
5. If the fuel filter is OK, replace the fuel pump. Refer to «Removal and Installation»(/audi/tt/8j-2010-2014/remont/fuel-system/#fuel-supply-system-coupe) .

Assembling

Assemble in reverse order of disassembling. Note the following

Note. Before disconnecting the pressure gauge, release pressure by opening shut-off valve. Hold the hose in a measuring container -arrow-.

Connect the fuel supply line -3-. Check for cleanliness and leaks.

Engage the fuel supply line in the bracket and install the heat shield boot -1-.

TT Coupe: Install the rear bench seat. Refer to Removal and Installation .

TT Roadster: Install the right rear panel trim panel. Refer to Removal and Installation .

VACUUM SYSTEM, CHECKING

Special tools and workshop equipment required

1. Hand Vacuum Pump VAS 6213

Procedure

Check all vacuum lines in the vacuum system for

1. Cracks
2. Damage caused by animals
3. Crimps
4. Leaks

Check the vacuum line leading to and from the solenoid valve.

If there is a fault stored in the DTC memory, check the vacuum lines for the named component, but also all the vacuum lines to the other components.

If using the VAS 6213 does not produce any pressure or if the pressure drops again right away, then check the hand vacuum pump and the connection hoses for leaks.

WIRING AND COMPONENTS, CHECKING WITH TEST BOX 105 PIN -V.A.G 1598/42

Special tools and workshop equipment required

1. Adapter -V.A.G 1598/39-1
2. Adapter -V.A.G 1598/39-2
3. Test Box 105 Pin -V.A.G 1598/42

Note. The test box has 105 terminals. The connection cable can be separated from the test box. This means that as new Engine Control Module (ECM) connectors are introduced in the future, only a new cable must be designed and no longer the entire test box. The smaller of the two connectors on the ECM is assigned with terminals 1 to 60. The larger of the two connectors is assigned with terminals 1 to 94. For testing at the 60-pin harness connection, the -V.A.G 1598/39-1- is connected to the test box with connector "A". Components of the 60-pin harness connection. Refer to Wiring Diagram. For testing at the 94-pin harness connection, the -V.A.G 1598/39-2- is connected to the test box with connectors "A and B". Components of the 94-pin harness connection. Refer to Wiring Diagram. The V.A.G 1598/42 is designed so that it can be connected simultaneously to the ECM harness and the ECM itself. This is advantageous because electronic engine control remains fully functional (for example measurement of signals with engine running) when the test box is attached. The procedures will indicate whether the ECM is to remain connected to the test box or not.

The ECM must be removed to disconnect the ECM harness connectors. Refer to Engine Control Module -J623 .

Connect the -V.A.G 1598/42- to the wiring harness using -V.A.G 1598/39-1- or -V.A.G 1598/39-2-. Connect test box ground clip to battery negative terminal. The procedure will indicate whether the ECM is to be connected to the test box or not.

Scheme 313

Perform the test as described in the corresponding repair procedure.

Installing the ECM

Installation is performed in reverse order, ECM must be installed with the protective housing. New shear bolts must be used.

Perform the following work after the ECM is reconnected

Check the DTC memory.

Note. The diagnostic system will try to erase all DTC memories for all control modules when "Guided Fault Finding" has ended. If unsuccessful, then all the faults stored in the DTC memory must corrected until the DTC memory can be erased.

AIR FILTER

Removing

Remove the engine cover -1- upward -arrows-.

Scheme 314

Remove all the screws from the air filter housing upper section and then remove the air filter housing upper section -arrow- upward.

Scheme 315

Remove air filter insert.

Installing

Install in reverse order of removal. Note the following

1. For the correct tightening specifications, refer to «AIR FILTER OVERVIEW»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe) .

Note. Always use an original air filter. Air filter housing must be clean on the inside. Note the following when blowing out air filter housing with compressed air: Cover the air guide pipes, etc. with clean clothes. The hose connections as well as the air guide pipes and hoses must be free of oil and grease before installing. When installing, do not use any lubricants containing silicone. Secure all hose connections with hose clamps of the same type as those equipped by the factory. In order to be able to securely mount the air guide hoses on their connectors, spray the screws on the previously used clamps with a rust remover.

Clean the water drain hose (the small hole in the lower air filter section) using compressed air.

Clean the air filter housing (upper and lower section) of salt residue, dirt or leaves (if necessary, by extracting).

Check the air guide hoses (clean air side) for salt residue, dirt and leaves.

Check air duct from lock carrier to air filter housing for dirt and leaves.

Mount the air filter centered into the air filter housing lower section mount.

Carefully position the upper section of the air filter hosing on the lower section. Make sure the upper section of the air filter does not sit at an angle on top of the air filter (pay attention to the sealing lip on the air filter).

AIR FILTER HOUSING

Removing

Remove the engine cover -1- upward -arrows-.

Note. When installing, bring all cable ties back to the same positions.

Remove the bolts -arrows- and air guide.

Scheme 316

Loosen the clamps -2 and 3- and remove the air guide hoses.

Scheme 317

Free up the wiring harness -1- on the air filter housing bracket.

Remove the bolts -arrows- and the air filter housing.

Installing

Install in reverse order of removal. Note the following

1. For the correct tightening specifications, refer to «AIR FILTER OVERVIEW»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe) .

Note. The hose connections as well as the air guide pipes and hoses must be free of oil and grease before installing. When installing, do not use any lubricants containing silicone. Secure all hose connections with hose clamps of the same type as those equipped by the factory. In order to be able to securely mount the air guide hoses on their connectors, spray the screws on the previously used clamps with a rust remover.

Check air duct from lock carrier to air filter housing for dirt and leaves.

ENGINE CONTROL MODULE -J623

Special tools and workshop equipment required

1. Hot Air Blower VAS 1978/14A with nozzle attachment from the Wiring Harness Repair Set VAS 1978 B
2. Small commercially available locking pliers

Note. Some Engine Control Modules (ECMs) are not equipped with a protective housing. The removal and installation of the protective housing depends on the engine and transmission combination. The ECM -1- has a protective housing -2 and 5-. To make removing the shear bolts -4- for the retaining tabs -2- more difficult, the threads are coated with locking compound. To disconnect the connectors from the ECM (for example to connect the test box or to replace the ECM), the protective housing must be removed.

Removing

Select "replace engine control module" in "Guided Functions" on the Vehicle diagnostic tester if the engine control module was replaced.

Turn off the ignition and remove the key.

Pry off the caps on the windshield wiper arms using a screwdriver.

Loosen the nuts -arrows- by several turns.

Scheme 318

Loosen the windshield wiper arms from the wiper axle by tilting them slightly.

Remove the nuts and remove the windshield wiper arms from the wiper axles.

Note. If wiper arm cannot be removed in this way, use a standard puller.

Remove gasket -1-.

Scheme 319

Carefully remove the plenum chamber cover -2- starting upward starting at the edge of the window -arrows-.

Note. Ignore -3 and 4-.

Free up engine wiring harness on the back of the plenum chamber bulkhead.

Open clips -arrows- and remove ECM.

Additional steps if there is a protective housing installed

Note. Cover painted surfaces with a cloth to protect against scratches.

To increase the difficulty with which the ECM connectors can be accessed, the ECM is secured in a metal housing with retaining tabs and shear bolts.

Scheme 320

The threads of the shear bolts -4- (that are not installed in ECM) are coated with a locking compound. For this reason, the threads must be heated with the heat gun to remove both bolts.

The threads of both shear bolts -3- (that are installed in the ECM) are not coated with a locking compound. The threads in the ECM housing must not be heated and do not require to be heated (unintentional heating of the ECM).

Set the adjustment on the heat gun as shown in the illustration, with the temperature potentiometer -2- set to maximum heat and the two-stage airflow switch -3- set to level 3.

Scheme 321

Warm threads on connector side of the shear bolts as shown in illustration.

Switch on heat gun and heat the bolt for approximately 20 to 30 seconds.

Scheme 322

Remove shear bolts with suitable locking pliers (see direction of -arrow-).

Scheme 323

The shear bolts installed in the ECM do not need to be heated for removal. They can be removed without heat.

Disconnect metal retainers from the connectors.

Remove both bolts from the ECM.

Disengage the connectors from the ECM and disconnect the connector.

Scheme 324

Remove the used ECM and connect the new ECM.

Note. When the connector is disconnected from the ECM, adaptation values are erased but the content of the DTC memory remains intact.

Installing

Install in reverse order of removal. Note the following

The ECM must be installed with a housing.

Clean threaded holes for shear bolts of locking compound residue. Cleaning can be performed with a thread cutter (tap).

Use new shear bolts.

Perform the following step after installing a new engine control module

Activate the ECM in "Guided Functions" under "replace engine control module". To do this, use a vehicle diagnostic tester.

Install wiper arms. Refer to [For transmission(s) 02E] Removal and Installation .

FUEL INJECTORS

Special tools and workshop equipment required

1. Tool Set T10133

Removing

Remove the upper section of the intake manifold. Refer to INTAKE MANIFOLD, UPPER SECTION .

Remove the intake manifold lower section. Refer to INTAKE MANIFOLD, LOWER SECTION, WITH FUEL RAIL .

Disconnect the connectors -1 through 5- from the fuel injectors.

Scheme 325

Remove the ring -4- from the fuel injector -1-.

Scheme 326

Place the puller T10133/2A on the groove on the fuel injector.

Scheme 327

Mount the removal tool T10133/16 on the puller.

Turn the bolt and remove the fuel injector -1-.

Repeat this on each fuel injector.

Remove the intake manifold lower section gasket.

Disassemble the Fuel Injector.

Remove the O-ring -3- and spacer ring -2- from the fuel injector -1-.

Remove the circlip -7- and upper sealing washer -5- and lower sealing washer -6-.

Carefully remove the old combustion chamber ring -8- by cutting the sealing ring with a knife and prying it open with a small screwdriver.

Note. Make sure that the groove of the fuel injector does not become damaged. If the groove is damage, the fuel injector must be replaced.

Installing

Clean the hole inside the cylinder head with a nylon cylinder brush T10133/4.

Scheme 328

Note. Replace the combustion chamber seal and O-ring. Replace the sealing ring if it is damaged.

Before installing the new combustion chamber seal, the seal groove and the shaft of the fuel injector must be cleaned of combustion residue using a clean rag.

Place the assembly cone T10133/5 with the new combustion chamber seal -1- onto the fuel injector -2-.

Scheme 329

Slide combustion chamber seal with assembly sleeve T10133/6 as far as possible onto assembly cone T10133/5.

Scheme 330

Turn the guide sleeve T10133/6 and the combustion chamber seal until they slide into the groove.

Scheme 331

Note. When pushing the combustion chamber seal onto the fuel injector, the seal spreads open. Therefore after pushing it on, it must be tightened again in 2 steps, as follows.

Press the calibration sleeve T10133/7 with a gentle turning movement (approximately 180°) all the way onto the fuel injector.

Turn the T10133/7 in the opposite direction and remove it.

Press the calibration sleeve T10133/8 with a gentle turning movement (approximately 180°) all the way onto the fuel injector.

Scheme 332

Turn the T10133/8 in the opposite direction and remove it.

Coat the new O-ring -3- with clean engine oil before installing the fuel injector -1-.

Note. The combustion chamber seal -8- must not be oiled.

Install the gasket for the intake manifold lower section.

Press the fuel injector by hand into the bore in the cylinder head (free of oil and grease) until it stops. Make sure fuel injectors are positioned correctly in the cylinder head.

Note. The fuel injector must not be difficult to install. If necessary, wait as the combustion chamber seal continues to pull itself together. Make sure the fuel injector is positioned correctly in the cylinder head.

1. The electrical connection of the fuel injector must engage in the intended recess of the cylinder head.

Install the lower intake manifold section. Refer to INTAKE MANIFOLD, LOWER SECTION, WITH FUEL RAIL .

Install the upper section of the intake manifold. Refer to INTAKE MANIFOLD, UPPER SECTION .

FUEL PRESSURE SENSOR -G247

Special tools and workshop equipment required

1. Assembly Tool T10118
2. Double Hexagon Socket, 1/2", 27 mm VAS 5301/7 or a commercially available 27 mm socket

Removing

Reduce fuel pressure in high pressure area.

Disengage Evaporative Emission (EVAP) canister purge regulator valve 1 -N80- -1-.

Scheme 333

Remove the bolt -2-.

Loosen the clamp -3- and remove the hose.

Note. Place a cloth underneath to catch any fuel.

Disconnect electrical connector -arrow-.

Scheme 334

Remove the fuel pressure sensor using the VAS 5301/7.

Installing

Install in reverse order of removal.

HEATED OXYGEN SENSOR (HO2S) -G39- WITH OXYGEN SENSOR (O2S) HEATER -Z19

Special tools and workshop equipment required

1. Ring Spanner 7-Piece Set 3337

Removing

Remove the engine cover -1- upward -arrows-.

Remove the bolts -arrows-.

Scheme 335

Open the clamps -1 and 2- and remove the air guide pipe.

Remove and disconnect the connector -1- for the HO2S.

Remove the HO2S -2- using a tool from the 3337.

Scheme 336

Installing

Install in reverse order of removal. Note the following

Note. New oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body. For a used oxygen sensor, only coat threads with hot bolt paste. This paste must not come into contact with oxygen sensor slots. Hot bolt paste. Electrical wire of oxygen sensor must always be secured in the same position when installing so that contact with the exhaust pipe is avoided.

1. Tightening specification, refer to «OXYGEN SENSORS OVERVIEW»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe) .

Install the air guide pipe. Refer to Description and Operation .

HIGH PRESSURE PIPE

Special tools and workshop equipment required

1. Torque Wrench 5-50 Nm V.A.G 1331
2. Tool Insert, AF 17 V.A.G 1331/6
3. Puller T10055

Removing

Reduce fuel pressure in high pressure area. Refer to RELEASING PRESSURE IN HIGH PRESSURE AREA .

Remove the upper section of the intake manifold. Refer to INTAKE MANIFOLD, UPPER SECTION .

Remove the bolts -arrows-.

Scheme 337

Disconnect the connector -6- from Camshaft Position (CMP) sensor 3 -G300-.

Release the connectors and remove them from the ignition coils -1 through 5-.

Move the wiring harness to the left.

Disconnect the connector -1- on the exhaust camshaft adjustment valve 1 -N318-.

Scheme 338

Note. Ignore -arrow-.

Remove the bolts -arrows- and union nut -4-.

Scheme 339

Loosen the clamp -2- and remove the fuel hose.

Remove the fuel supply line.

Remove the union nuts -1 and 3- and the high pressure pipe.

Installing

Note. High pressure line connections must not show any signs of damage. Do not change the shape of the high pressure pipe.

First tighten the union nut by hand making sure that it contacts the high pressure line free-of-stress.

Scheme 340

Counter hold using an open end wrench on the threaded connection and tighten the union nut using a V.A.G 1331 and a V.A.G 1331/6.

1. For the correct tightening specifications, refer to «HIGH PRESSURE PUMP OVERVIEW»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe)

First tighten the bolt of the retaining strap, after that, the high pressure line is tightened.

Install the upper section of the intake manifold. Refer to INTAKE MANIFOLD, UPPER SECTION .

HIGH PRESSURE PUMP

Removing

Reduce fuel pressure in high pressure area. Refer to RELEASING PRESSURE IN HIGH PRESSURE AREA .

Remove the engine cover -1- upward -arrows-.

Remove the bolts -arrows-.

Open the clamps -1 and 2- and remove the air guide pipe.

Note. Place a cloth underneath to catch any fuel.

Remove the union nuts -1 and 2-.

Disconnect the connector -3- from the fuel metering valve -N290-.

Remove the bolts -arrows-.

Push the fuel lines away and remove the high pressure pump.

Installing

Install in reverse order of removal. Note the following

Note. Replace the high pressure pump O-ring. High pressure line connections must not show any signs of damage.

Check the plunger -1- for damage and replace it if necessary.

Scheme 341

Coat the roller tappet with oil and insert it with its guide -2- into the cylinder head -arrow-.

Insert the high pressure pump and press it down into its guide until it stops.

Tighten the bolt hand-tight and in small steps.

Tighten the bolt to the tightening specification alternating from side to side.

1. Tightening specification, refer to «HIGH PRESSURE PUMP OVERVIEW»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe) .

Install the air guide pipe. Refer to Description and Operation .

INTAKE MANIFOLD, LOWER SECTION, WITH FUEL RAIL

Removing

Remove the upper section of the intake manifold. Refer to INTAKE MANIFOLD, UPPER SECTION .

Remove the high pressure pipe. Refer to HIGH PRESSURE PIPE .

Remove the front noise insulation -1-. Refer to Underbody Trim Panels in Removal and Installation .

Scheme 342

Note. When installing, bring all cable ties back to the same positions.

Remove the oil dipstick -2-.

Scheme 343

Remove the bolts -arrows- and then remove the oil dipstick tube -1- upward.

Disconnect the connectors

Scheme 344

1

Intake manifold runner control valve -N316

4

Fuel Pressure Sensor -G247

5

Intake Manifold Runner Position Sensor -G336

Disconnect and free up the vacuum hose -2- and hose -3- from the EVAP canister.

Free up electrical wiring harness.

Loosen the bolts in sequence -11 to 1-.

Remove the bolt and intake manifold lower section.

Note. It is necessary to remove the fuel injectors in order to remove the intake manifold lower section gasket.

Remove the fuel injectors. Refer to FUEL INJECTORS .

Installing

Install in reverse order of removal. Note the following

1. Tightening specification (Scheme 304)

Note. Replace the seals and O-rings. Install the fuel injectors after installing the intake manifold lower section gasket.

Install the fuel injectors. Refer to FUEL INJECTORS .

Tighten the oil dipstick guide tube. Refer to Special Tools .

Install the high pressure pipe. Refer to HIGH PRESSURE PIPE .

Install the upper section of the intake manifold. Refer to INTAKE MANIFOLD, UPPER SECTION .

Install the noise insulation. Refer to Underbody Trim Panels in Removal and Installation .

INTAKE MANIFOLD, UPPER SECTION

Removing

Remove the engine cover -1- upward -arrows-.

Remove the bolts -arrows- and the air guide.

Loosen the hose clamp -arrow- and remove the air guide hose.

Scheme 345

Loosen the hose clamp -2-.

Scheme 346

Disconnect the connector -3- from the charge air pressure sensor -G31- / Intake Air Temperature (IAT) sensor 2 -G299-.

Note. Ignore -1-.

Disconnect the connectors

Scheme 347

1. Throttle valve control module -J338
2. Intake air temperature sensor -G42- /manifold absolute pressure sensor -G71
3. Turbocharger recirculating valve -N249

Disengage Evaporative Emission (EVAP) canister purge regulator valve 1 -N80- -1-.

Remove the bolt -2-.

Loosen the clamp -3- and remove the hose.

Press the release buttons and remove the crankcase ventilation hose -arrow-.

Remove the bolts -1 through 5- and the intake manifold upper section.

Installing

Install in reverse order of removal. Note the following

1. For the correct tightening specifications, refer to «INTAKE MANIFOLD, UPPER SECTION OVERVIEW»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe) .

Note. Replace the seal and O-ring. The hose connections as well as the air guide pipes and hoses must be free of oil and grease before installing. When installing, do not use any lubricants containing silicone. Secure all hose connections with hose clamps of the same type as those equipped by the factory. In order to be able to securely mount the air guide hoses on their connectors, spray the screws on the previously used clamps with a rust remover.

INTAKE AIR TEMPERATURE SENSOR AND MANIFOLD ABSOLUTE PRESSURE SENSOR

Removing

Remove the engine cover -1- upward -arrows-.

Disconnect the connector -1-.

Scheme 348

Remove the bolts -2- and then remove the Intake Air Temperature (IAT) sensor -G42- /Manifold Absolute Pressure (MAP) sensor -G71-.

Installing

Install in reverse order of removal. Note the following

Note. Replace the O-ring.

OXYGEN SENSOR AFTER THREE WAY CATALYTIC CONVERTER -G130- WITH HEATER FOR OXYGEN SENSOR 1 AFTER CATALYTIC CONVERTER -Z29

Special tools and workshop equipment required

1. Ring Spanner 7-Piece Set 3337

Removing

Remove the engine cover -1- upward -arrows-.

Loosen the clamps -arrows- and remove the air guide pipe -1-.

Scheme 349

Remove the electrical connector -2- for the Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC) -G130- from the bracket and disconnect it.

Remove the Heated Oxygen Sensor (HO2S) -G130- -1- using a tool from the 3337.

Installing

Install in reverse order of removal. Note the following

1. Tightening specification, refer to «OXYGEN SENSORS OVERVIEW»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe) .

Note. New oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body. For a used oxygen sensor, only coat threads with hot bolt paste. This paste must not come into contact with oxygen sensor slots. Hot bolt paste. Electrical wire of oxygen sensor must always be secured in the same position when installing so that contact with the exhaust pipe is avoided. The hose connections as well as the air guide pipes and hoses must be free of oil and grease before installing. When installing, do not use any lubricants containing silicone. Secure all hose connections with hose clamps of the same type as those equipped by the factory. To mount the charge hoses on their connectors securely, spray the bolts on the used clamps with rust remover before installing.

THROTTLE VALVE CONTROL MODULE -J338

Removing

Remove the bolts -arrows- and the air guide.

Loosen the hose clamp -arrow- and remove the air guide hose.

Loosen the hose clamp -2-.

Disconnect the connector -3- from the charge air pressure sensor -G31- / Intake Air Temperature (IAT) sensor 2 -G299-.

Note. Ignore -1-.

Disconnect the connectors

1 - Throttle valve control module

3 - Turbocharger recirculating valve -N249

Note. Ignore -2-.

Disengage Evaporative Emission (EVAP) canister purge regulator valve 1 -N80- -1-.

Remove the bolt -2-.

Loosen the clamp -3- and remove the hose.

Remove the bolts -arrows- and then remove the throttle valve control module -1- and connection from the air guide hose -2-.

Scheme 350

Installing

Install in reverse order of removal. Note the following

1. For the correct tightening specifications, refer to «INTAKE MANIFOLD, UPPER SECTION OVERVIEW»(/audi/tt/8j-2010-2014/remont/fuel-system/#25l-multiport-fuel-injection-engine-codes-cepb-coupe) .

Note. Replace the seal and O-ring. The hose connections as well as the air guide pipes and hoses must be free of oil and grease before installing. When installing, do not use any lubricants containing silicone. Secure all hose connections with hose clamps of the same type as those equipped by the factory. In order to be able to securely mount the air guide hoses on their connectors, spray the screws on the previously used clamps with a rust remover.

After replacing, perform an "adaptation" in "Guided Functions" VAS 5051B.

Scheme 351

Special tools and workshop equipment required

1. Fuel Inj. Pressure Gauge-CIS V.A.G 1318
2. Adapter V.A.G 1318/11
3. Adapter V.A.G 1318/17A
4. Fuel Line Feed Adapter V.A.G 1318/23
5. Remote Control Connection V.A.G 1348/3A with Remote Control for VAG 1348 V.A.G 1348/3-3
6. Connector Test Set V.A.G 1594C

Special tools and workshop equipment required

Scheme 352

Scheme 353

Scheme 354

Scheme 355

Scheme 356

Scheme 357

Scheme 358

Scheme 359

Scheme 360

1. Ring Spanner 7-Piece Set 3337
2. Puller T10055
3. Assembly Tool T10118
4. Tool Set T10133
5. Torque Wrench 5-50 Nm V.A.G 1331
6. Tool Insert, AF 17 V.A.G 1331/6
7. Double Hexagon Socket, 1/2", 27 mm VAS 5301/7 or a commercially available 27 mm socket
8. Hand Vacuum Pump VAS 6213
9. Adapter -V.A.G 1598/39-1
10. Adapter -V.A.G 1598/39-2
11. Test Box 105 Pin -V.A.G 1598/42
12. Hot Air Blower VAS 1978/14A -1- with nozzle attachment -2- from the Wiring Harness Repair Set VAS 1978 B
13. Small commercially available locking pliers -3

See also:
• [For transmission(s) 02E] Removal and Installation
• Camshaft Position Sensor -G40- / Camshaft Position Sensor 3 -G300
• IGNITION COILS
• Removal and Installation
• Removal and Installation
• Removal and Installation
• Engine Speed Sensor -G28
• Removal and Installation
• Removal and Installation
• Knock Sensors -G61- / Knock Sensors 2 -G66
• Removal and Installation
• Removal and Installation
• Removal and Installation
• Removal and Installation
• Removal and Installation
• [For transmission(s) 02E] Removal and Installation
• Removal and Installation
• RELEASING PRESSURE IN HIGH PRESSURE AREA
• AIR FILTER
• AIR FILTER HOUSING
• FUEL INJECTORS
• INTAKE AIR TEMPERATURE SENSOR AND MANIFOLD ABSOLUTE PRESSURE SENSOR
• Throttle Valve Control Module -J338
• Fuel Pressure Sensor -G247
• Oxygen Sensor after Three Way Catalytic Converter -G130- WITH Heater for Oxygen Sensor 1 after Catalytic Converter -Z29
• Heated Oxygen Sensor (HO2S) -G39- WITH Oxygen Sensor (O2S) Heater -Z19
• Engine Control Module -J623
• HIGH PRESSURE PIPE
• HIGH PRESSURE PUMP
• INTAKE MANIFOLD, LOWER SECTION, WITH FUEL RAIL
• INTAKE MANIFOLD, UPPER SECTION
• AIR FILTER OVERVIEW