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
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
- 14. Electric equipment
   14.1.2. Measuring devices
   14.1.3. Equipment of measurements
   14.1.4. Electric equipment checks
   14.1.5. Sound signal
   14.1.6. Replacements of safety locks
   - 14.1.7. Storage battery Unattended storage batteries Check of the storage battery Self-category of the storage battery Charging of the storage battery Storage of the storage battery Diagnostics of malfunctions of the storage battery
   + 14.1.8. Generator
   + 14.1.9. Starter
   14.1.10. Traction relay
   + 14.1.11. Lighting system
   14.1.12. Devices
   14.1.13. Dashboard
   14.1.14. Filament lamps on the dashboard
   14.1.15. Light switch
   14.1.16. Radio receiver
   + 14.1.17. Aerial
   14.1.18. Loudspeakers
   + 14.1.19. Rubber brushes of screen wipers
   14.1.20. Jets of a stekloomyvatel
   14.1.21. Washing nozzles of headlights
   14.1.22. Screen wiper and its engine
   14.1.23. Protect the car
   14.1.24. Anticreeping "immunodeficiency"
   14.1.25. Why headlights grow dull
   14.1.26. "Galogenki"
+ 14.2. Electroschemes

b47c026d b47c026d Self-category of the storage battery


Depending on car equipment the natural category of the storage battery is promoted by current consumption by various control systems even in that case when the engine does not work. Therefore at the standing car it is necessary to recharge the storage battery every four weeks. If the suspicion in stock leak currents on surfaces of insulators is available, check an electric onboard network.

To check apply the charged storage battery.

1. Disconnect from the battery plug a weight wire (–).

All saved-up data in electronic memories, as, for example, an anticreeping code of radio are thus erased. Before shutdown of the storage battery it is necessary to read also the recommendations provided in subsection 14.1.7.

2. Establish on the ampermeter (a measurement range from 0–5 мА to 5 And) the maximum limits of measurement. The ampermeter turn on between a negative pole of the battery and a wire connecting its pole to the case of the car.


Check can be carried out as well by means of a control bulb. But if the bulb does not light up at its inclusion between a flexible crossing point and a negative pole of the storage battery, in any case it is necessary to use the ampermeter.

3. Disconnect all consumers of a current, disconnect from plugs an electronic clock (the constant consumer of a current), close doors.
4. Switching ampermeter ranges, define current size.
5. Removing safety locks, consistently disconnect various electric chains. If in one of the broken-off chains the zero, here is displayed and it is necessary to look for a malfunction source. The correlated or polluted contacts through wiped wires, internal short circuit in units can be defects.
6. If in the electric chains protected by fuses, it is not revealed defects, it is necessary to pull together tips of wires from the units which have not been protected by fuses. Those are: ignition system, generator and starter.
7. If at a detachment from plugs of one of unprotected by fuses of units indication comes back to zero, repair or replace the corresponding detail. At detection of leakage of a current in a starter or in ignition system, first of all check the ignition switch according to the schematic diagram of electric equipment.
8. Connect to the accumulator plug a weight wire (–).
9. Establish time, and also enter an anticreeping code for radio.