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 vehicle diagnosis, testing and information systemVAS 5051B while 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 Removal and Installation .
If it is necessary to use testing and measuring devices on road tests, observe the following
| 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. Always secure testers on the rear seat with a strap and have a second person on the rear seat operate them. |
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 3
- 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- Removing and installing «IGNITION COILS»(ref-496109-S23082700112012082100000)
- 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 «Diagnosis and Testing»(ref-496102-S42529100052012082100000)
- Top cover for camshaft timing chain Removing and installing: «Removal and Installation»(ref-496099-S02837922012012082100000)
- 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 (CMP) 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 «Diagnosis and Testing»(ref-496102-S42529100052012082100000)
- Spark plug
- Control housing For camshaft adjustment Removing and installing: «Removal and Installation»(ref-496099-S02837922012012082100000)
IGNITION COILS
Special tools and workshop equipment required
- Puller For Ignition Coil T10095 A
- Assembly tool T10118
Removing
Disconnect electrical harness connectors to ignition coils, to do so attach assembly tool T10118 on release button -arrow- and carefully disconnect harness connector.
Scheme 4
Attach Puller For Ignition Coil T10095 A on ignition coils -arrow- as depicted in the.ion and pull out ignition coils in succession.
Scheme 5
Installing
Installation is in reverse order of removal, noting the following
Insert ignition coil into corresponding spark plug shaft so that the straight connector sides fit with each other -arrows-.
