E46 series BMW 3

since 1998 of release

Repair and car operation



E46 series BMW 3
+ BMW 3 Cars (Е46)
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ Power supply systems, injection and release
- Engine electric equipment
   General information and security measures
   + System of electronic control by ignition and injection of the petrol engine
   + ignition System
   + System of preheat of the diesel engine
   - Charge and start systems
      General information on system
      The battery - the main data and leaving
      Removal and installation of the storage battery
      Check of the storage battery
      Generator. General information and security measures
      Removal and generator installation
      Check and replacement of brushes of a generator / regulator of tension
      Removal and installation, starter check
      Removal, installation and check of the traction relay of a starter
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ electric equipment Schemes



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Check of the storage battery

The built-in index of degree of a zaryazhennost of the battery

The indicator has green color

The battery has sufficient degree of a zaryazhennost

The indicator has black color

The battery charging is required

The storage battery of the BMW car of the 3rd series has the built-in index of degree of a zaryazhennost of the battery (the shooter on an illustration), located on the top party of the battery. This “the magic eye” can show only the main condition of a zaryazhennost, of course.

The battery does not demand service. Addition of the distilled water is not required. It is possible to define level of electrolit outside. It is in the region of a mark of MAX-1-, approximately on 5 mm above lead plates.


Check of level of electrolit (at the batteries demanding service)

If the storage battery not BMW firms is bought, it is a question, as a rule, of the so-called low-served battery. In this case, if level of electrolit falls below MIN mark, it is required to add one-two time in a year the distilled water. All sections of the battery should have the identical level of electrolit being between marks of MAX and MIN.

Level of electrolit is checked surely outside. If it is impossible to make it, remove carving covers and glance in section from above. Level of electrolit should be on 5 mm above lead plates.

Check of density of electrolit

The electrolit density in a combination to tension of the battery provides guidance on degrees of a zaryazhennost of the battery.

The electrolit temperature at measurement should not be lower +10°С.

1 Switch off ignition.

2 Turn out jams from all sections of the battery. If there is a cover level, previously remove it by means of a screw-driver.


3 Ship in electrolit денсиметр and suck away such quantity of electrolit at which the float will emerge. The specific weight (density) of the taken sample of electrolit is higher, the float more emerges. On a scale of the device it is possible to consider value of specific weight (g/ml) or degrees to Boma (+ °Ве).
4 Density of electrolit should be not less than 1.20 g/ml. If value of density is lower, the battery is necessary for charging. Address to Specifications.
5 Consistently check each section of the battery. All sections should have identical density (the maximum difference of 0.04 g/ml). The big difference indicates battery damage.
Check of tension of rest of the battery

The condition of the storage battery is checked by measurement by the tension voltmeter between battery poles.

6 Disconnect battery poles, address to the Section Removal and installation of the storage battery.
7 Battery should be disconnected in 2 hours prior to check.

8 Attach the voltmeter to poles of the battery and measure tension.


9 Assessment of results of measurement:

12.5 In or above - the battery in a satisfactory condition
12.4 In or below - the battery in an unsatisfactory condition, is required a charging or battery replacement
10 Attach a negative cable (-) to the battery, address to the Section Removal and installation of the storage battery.

Check of tension of the battery under loading


11 Attach the voltmeter to battery poles.
12 Ask the assistant to start the engine and consider thus tension.
13 in the course of start at a full charging of the battery tension should not fall below 10 In (at electrolit temperature near +20°С).
14 If tension falls at once and the electrolit density in sections is various, the battery is damaged.