S-class W202 Mercedes

1993-2000 of release

Repair and car operation

W202 Mercedes
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
- 7. Ignition system
   7.2. Safety measures at repair of electronic system of ignition
   7.3. Ignition coils
   + 7.4. Spark plugs
   + 7.5. Device of a preliminary warming up of a diesel engine
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electroschemes

b47c026d b47c026d

7.2. Safety measures at repair of electronic system of ignition


At electronic systems of ignition secondary tension makes to 30 quarter. Under adverse circumstances, for example, at the increased humidity in a motor compartment, peaks of tension can punch isolation. If in this case adjoin to details of system of ignition, it can lead to an electroshock.

To avoid a travmirovaniye of the persons which are carrying out these works, and/or damage of electronic system of ignition, at carrying out repair work in cars with such system it is necessary to pay attention to underwritten rules.

At the working engine or at its start do not touch by hands of a wire of a high voltage and do not pull together it with hands.

Only at the disconnected ignition disconnect from plugs of a wire of system of ignition, in particular the multicontact tip of the regulating device of the engine.

Each electric chain of a high voltage should be loaded with the resistor having resistance not less than 2 kiloohms, i.e. at inclusion of ignition contact tips of spark plugs should be built in.

Only at the disconnected ignition attach and disconnect from plugs of wires measuring devices (the tachometer / device for check of system of ignition).

On plugs 1 (–) and 15 (+) coils of ignition it is impossible to connect a control bulb.

If when servicing the car carrying out test of flammable sparks is required, it is necessary to do it only with spark plug use directly in the cylinder. Thus provide good contact of a spark plug to the car case. A contact tip of a spark plug or a wire of a high voltage hold not a hand, and well isolated pincers in relation to the car case (for example, to the block of cylinders of the engine).

Before determination of frequency of rotation of a starter check pressure of compression, switch off ignition and remove the tip (And) on the HFM regulating device or the item sensor of a cranked shaft (L5) on the PMS regulating device.

Connecting elements of primary chain carry out tension to 400 Volts! Therefore always it is necessary to connect core clips / package to the car case.

At the electro - and spot welding disconnect from the plug of the storage battery an electric onboard network.

Wash the engine only at the switched-off ignition.

Persons with an electrostimulator of heart cannot work with electronic system of ignition.