Battery — check and charge

General information and precautions

Attention! The electrical equipment of the engine consists of a battery charging system and an ignition system. Since the operation of these systems is related to the operation of the engine, they are described separately from the electrical equipment of the body.

The electrical system has an operating voltage of 12 volts.

A battery pack that does not require maintenance or requires minor maintenance (sealed for life) recharged from a generator.

Precautionary measures:When working on the electrical system, you must be especially careful not to damage the semiconductor elements (diodes and transistors) and avoid injury, the following rules must be observed when working on the electrical system:

Always remove rings, watches, etc. before working on the electrical system. Even after disconnecting the battery, the charge accumulated by any of the elements of electrical equipment may be discharged if the terminals of this element are touched with a metal object. You may be electrocuted or suffer a nasty burn.

Observe the polarity of the battery connection. Electrical components such as a generator, engine control electronic control unit or any other device containing semiconductor elements can be damaged if connected incorrectly.

When starting the engine with a second battery and jumper wires, connect the batteries plus to plus and minus to minus. The battery charger must be connected in the same way.

Never disconnect battery, alternator, or any other wires or devices while the engine is running.


Do not allow the engine to turn the generator armature when the generator is not connected.

Never test the generator by touching the output wire of the generator "vehicle mass.

Do not use an ohmmeter with a mechanical current generator to test for continuity.

Always disconnect the negative battery cable before working on the electrical system.

Disconnect the battery, alternator and other electrical equipment such as electronic control units before using electric welding to repair a vehicle so that they are not damaged.

The standard radio/stereo player has a coding system to reduce the chance of theft. If the power to the device is turned off, the anti-theft system will be activated. Even if power is restored immediately, the radio/stereo player will not function until the correct passcode is entered. Therefore, if you do not know the correct radio/stereo code, do not disconnect the negative battery cable or remove the radio/stereo from the vehicle. See Section "Radio/stereo player coding system - Precautions" at the beginning of this guide.

1. With a low mileage of the car, it is recommended to check the density of the electrolyte every 3 months and compare with the table.



2. If you suspect a battery failure, compare the density of the electrolyte in the cells, which should differ by no more than 0.04. Otherwise, the plates are damaged or there is an electrolyte leak.


3. If the density differs within the specified limits, and the battery is discharged, then it must be charged.

Maintenance Free Batteries

4. Battery status is determined by a voltmeter or indicator.

5. Battery status is determined by the color of the built-in indicator (see photo), which depends on the battery type. As a rule, the green color of the indicator corresponds to the normal state of the battery, black indicates the need to charge, yellow or transparent indicates that the battery is out of order and should be replaced.



6. When checking the voltage with a voltmeter, at least 6 hours must elapse after the last trip) it is also allowed to turn on the main beam of the headlights for 30 s before checking).

7. The battery is completely discharged if the voltage is lower than 12.2V.

8. Discharged battery, remove and charge.

Charging a maintenance-free battery

9. Batteries of this type require a long charge (up to three days depending on the degree of discharge).

10. A partially discharged battery can be charged with a stabilized source with a voltage of 13.9-14.9 V, for typically 3 hours to a voltage of 12.5 V.


11. Fully discharged battery (with voltage below 12.2 V) it is recommended to charge in a specialized workshop, as constant monitoring is necessary during a long charge.

Charging a maintenance battery

12. The battery is charged with a current equal to 0.1 of the capacity until the density of the electrolyte stops changing for at least 4 hours.

13. The battery can also be charged with a small current of 1.5 A, leaving it overnight.

14. Forced battery charging is highly discouraged.

15. The temperature of the electrolyte during charging should not exceed 37.8°C.