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
      + 7.5.1. Check of the device of a preliminary warming up
      7.5.2. Device self-diagnostics
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electroschemes

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7.5.2. Device self-diagnostics


The power supply system of a diesel engine regulated by means of electronics (EVE, ERE) carries out the diagnosis independently, and the found malfunctions accumulates in memory of malfunctions. If there comes serious malfunction, EDS – a signaling device on the dashboard flashes. (EDS – Electronic control of a diesel engine). In a repair truck of Mercedes firm it is possible to interrogate malfunctions by means of the reading-out device and purposefully them to eliminate. Malfunction not necessarily arises because of bad road performance of the car. Therefore it is expedient to interrogate the saved-up malfunctions through certain intervals of run.

Contents of memory of malfunctions remain even at shutdown of the storage battery. Saved-up malfunctions automatically are erased, if they are not observed any more during about 20 trips following one after another. Malfunctions which were remembered by the device, can be extinguished manually by device means for reading of malfunctions.