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
      14.1.7.1. Unattended storage batteries
      14.1.7.2. Check of the storage battery
      14.1.7.3. Self-category of the storage battery
      14.1.7.4. Charging of the storage battery
      14.1.7.5. Storage of the storage battery
      14.1.7.6. 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

14.1.7.2. Check of the storage battery

GENERAL INFORMATION

There are two options of check of the storage battery. Depending on them use of various test devices is required.

Check of density of electrolit

In a combination to tension measurement the actual density of electrolit allows to draw a conclusion on degree of a razryazhennost of the accumulator.

To check it is applied storage денсиметр with a pipette. The more specific weight (electrolit density) drained-in electrolit, the plunges a float (areometer) more deeply. On a scale it is possible to consider electrolit density in the form of specific weight (g/ml) or degrees of Bome (+ ° as Ve).

The following values (should be reached at electrolit temperature about +20 ° C).

Degree of a razryazhennost of the accumulator	+ ° Ve	g/ml
It is discharged	16	1,15
It is half discharged	24	1,22
It is well charged	30	1,26

Consistently check each separate element, all elements of a cell should have identical density of electrolit (the maximum difference 0, 04 g/ml). Otherwise the faulty storage battery can become isolated.

Check of the storage battery under loading

PERFORMANCE ORDER

1. Connect the voltmeter to battery poles.

2. Instruction: if tension of the storage battery (without connection of consumers) less than 12 In, it is discharged and it is necessary for recharging.

3. Start the engine and consider tension.

4. In the course of engine start at the charged battery room of the battery tension should be not lower 8 In (at electrolit temperature about +20 ° C).

5. If tension falls down at once and in cells the various density of electrolit was fixed, the faulty accumulator can become isolated.

The general tension can be measured by means of the device for check of a condition of storage batteries. Pay attention to recommendations of the manufacturer on the care of the storage battery.

Control values

BATTERY CAPACITY, А*Ч	LOADING CURRENT, AND	MINIMUM TENSION LATER 5–10 SECONDS. AT t 0–20 ° WITH
62	190	10,0 In
74	265	10,0 In
100	300	10,0 In

Prevention

If during this measurement (lasting 10 seconds) the general tension falls below 10 In, the storage battery or is discharged or faulty.