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 printable version
Ignition and engine control
Ignition coils
 | 4-cylinder petrol engine
1 - Front engine cover
2 - Bolt
3 - Spacer
4 - Cover the ignition coils
5 - Bolt M6h25, 9Nm
6 - ignition coil
7 - Plug the spark plug
8 - Spark Plug | Engine 111: 28nm
Engine 271: 25 Nm
6-cylinder petrol engine
10 - ignition coil
11 - Spark Plug, 28nm
12 - Bolt, 8 nm
13 - Ignition cable with plug spark plug from the ignition coil to the spark plug |
Arrangement of components of control systems. Models C240 and C320
 | 1 - Front control unit selection and signal detection (SAM) with a box fuse / relay and relay mixing secondary air
2 - Module fan relay
3 - ECM
4 - SAM control unit with manual switch / fuse and relay starter | 5 - The gauge-switch clutch pedal
6 - Connector DLC
7 - Pedal
8 - Rear SAM control unit with a box fuse / relay and the fuel pump relay |
The ignition system generates sparks that produce ignition sucked the air-fuel mixture. To this end in the ignition coil voltage 12 is converted into a voltage of 30,000 V.
Electronic direct ignition system is part of the engine management system and includes spark plugs and ignition coils with built-in plugs spark plugs. At 6-cylinder engine ignition coil and spark plugs are connected short cable.
The current distribution of the ignition spark operates an electronic control unit.
External timing adjustments are not made. If the ignition timing deviates from a predetermined value, it is necessary to replace the damaged items.
The ignition system does not wear out and does not require maintenance. In accordance with the schedule of maintenance is only required to replace the spark plugs.
Basic information on work and sensors and control systems of injection of petrol and diesel engines are set out in Section management system and fuel injection petrol engine.
Basic elements of the electrical equipment unit controlling ignition and fuel injection, sensors, valves, and drive elements are presented in the accompanying illustrations.
Security measures at work with injection and ignition system
To eliminate personal injury and / or damage to the injection system and the ignition must be observed the following:
?� Do not touch or remove the ignition wires with the engine running or when the starter is switched on.
?� Unplug and connect the pipes of fuel injection system and ignition cables and electric wires measuring devices only when the ignition is off.
?� Do not allow to work with an electronic ignition system for people with a cardiac pacemaker.
?� Do not short-circuit to ground terminal 1 of ignition coils.
?� When working with RPM engine start, for example, when checking the pressure of compression switch off the ignition and disunite connector CKP sensor.
?� Do not connect the test lamp to terminal 1 of the ignition coil.
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