SAFETY PRECAUTIONS
To prevent personal injury and damage to the injection and ignition system, observe the following
- The ignition must be switched off before connecting or disconnecting injection and ignition system wiring or tester cables.
- Only clean engine with ignition switched off.
- If electrical connectors were disconnected, faults are saved in ECM
Connect the vehicle diagnosis, testing and information system VAS 5051B while the ignition is switched off.
Start "Guided Functions" operating mode.
Generate readiness code in ECM.
| CAUTION | Risk of destroying electrical components when battery is disconnected. Observe measures when disconnecting battery. Only disconnect battery with ignition switched off. |
Disconnect battery. Refer to [For transmission(s) 02E] Removal and Installation .
If it is necessary to use testing and measuring devices on road tests, observe the following
Scheme 24
| WARNING | Distraction and improperly secured test equipment can lead to accidents. Risk of passenger airbag deploying in an accident. Operating testing and measuring equipment while driving creates a distraction. There is an increased risk of injury due to unsecured testing and measuring equipment. TT Coupe: Always secure testers on the rear seat with a strap and have a second person on the rear seat operate them. TT Roadster: Position passenger's seat as far back as possible. Only use the vehicle diagnosis and service system VAS 5052 or diagnostic system VAS 5053. Testing and measuring instruments -1- must lay flat on the passenger's thighs and be operated by him or her, as shown in the illustration. |
IGNITION SYSTEM
- For trouble-free operation of the electrical components a voltage of at least 12.5 V is necessary.
- If the engine only starts briefly and then turns off again after troubleshooting, repair or checking of the components, it may be that the immobilizer is blocking the Engine Control Module (ECM). DTC memory must then be checked and if necessary, control module must be adapted.
Scheme 25
- Ignition Coils with Power Output Stages Cylinder 1 Ignition Coil 1 with Power Output Stage -N70- Cylinder 2 Ignition Coil 2 with Power Output Stage -N127- Cylinder 3 Ignition Coil 3 with Power Output Stage -N291- Cylinder 4 Ignition Coil 4 with Power Output Stage -N292- Cylinder 5 Ignition Coil 5 with Power Output Stage -N323- Cylinder 6 Ignition Coil 6 with Power Output Stage -N324- Removal and installation, refer to «IGNITION COILS»(/audi/tt/8j-2006-2010/remont/ignition-system/#32l-ignitionglow-plug-system-engine-codes-cbra-coupe-as-of-072007__ignition-coils)
- 4-Pin Harness Connector For ignition coils with power output stage
- Bracket For Knock Sensor (KS) 1 -G61- connector
- Bolt 10 Nm
- 3-Pin Harness Connector Black With gold-plated terminals
- Knock Sensor (KS) 1 -G61
- Bolt 20 Nm For trouble-free knock sensor function, it is important to use the exact tightening specifications
- Camshaft Adjuster Exhaust side With sensor wheel for Camshaft Position (CMP) Sensor 2 -G163- After reinstalling, adjust valve timing, refer to «Description and Operation»(/audi/tt/8j-2006-2010/remont/mechanical/#32l-crankshaft-cylinder-block-engine-codes-cbra-coupe)
- Camshaft Timing Chain Top Cover Removal and installation, refer to «Description and Operation»(/audi/tt/8j-2006-2010/remont/mechanical/#32l-crankshaft-cylinder-block-engine-codes-cbra-coupe)
- Seal Replace
- Camshaft Position (CMP) Sensor 2 -G163- For exhaust camshaft
- Bolt 10 Nm
- 3-Pin Harness Connector Black With gold-plated terminals
- Camshaft Position Sensor -G40- For intake camshaft
- Knock Sensor (KS) 2 -G66
- 2-Pin Harness Connector Black With gold-plated terminals
- Camshaft Adjuster Intake side With sensor wheel for Camshaft Position (CMP) Sensor -G40- After reinstalling, adjust valve timing, refer to «Description and Operation»(/audi/tt/8j-2006-2010/remont/mechanical/#32l-crankshaft-cylinder-block-engine-codes-cbra-coupe)
- Spark Plug Current values Removal and installation
- Control Housing For camshaft adjustment Removal and installation, refer to «Removal and Installation»(/audi/tt/8j-2006-2010/remont/mechanical/#32l-crankshaft-cylinder-block-engine-codes-cbra-coupe)
TEST DATA
| Test Data | 3.2L / 4V / 184 kW engine |
|---|---|
| Idle speed Cannot be adjusted, regulated by idle stabilization | 600 to 700/min () |
| Engine speed limitation Via fuel injector shut-off | Approximately 6500 RPM |
| Ignition timing Not adjustable, determined in the control module | |
| Ignition/Glow Plug System | Single coil ignition system with 6 ignition coils (output stages integrated) that are connected directly to spark plugs via the ignition cables. |
| Spark plug identification | => Data sheets for exhaust emission test. |
| 1) Current values => Data sheets for exhaust emission test. . | |
| () |
FASTENER TIGHTENING SPECIFICATIONS
| Component | Bolt Size | Nm |
|---|---|---|
| Camshaft Position (CMP) Sensor | 10 | |
| Knock Sensor (KS) | 20 |
IGNITION COILS
Special tools and workshop equipment required
- Ignition Coil Puller T10095 A
- Assembly Tool T10118
Removing
Disconnect electrical harness connectors to ignition coils, to do so attach T10118 on release button -arrow- and carefully disconnect harness connector.
Scheme 26
Position T10095 A on ignition coils -arrow- as shown in illustration and remove ignition coils one after another.
Scheme 27
Installing
Installation is in reverse order of removal, note the following
Insert ignition coil into corresponding spark plug shaft so that the straight connector sides fit with each other -arrows-.
Scheme 28
SPECIAL TOOLS
Special tools and workshop equipment required
Scheme 29
Scheme 30
- Ignition Coil Puller T10095 A
- Assembly Tool T10118