Cause of malfunction
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Elimination Method
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The battery is low
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The car has not been used for a long time
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Charge the battery with a charger or in another vehicle
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Faulty generator
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The contact in the battery charge circuit is broken: the fastening of the wires on the generator, the terminals on the battery are loose, the surfaces of the terminals or pins are oxidized
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Clean the oxidized surfaces, tighten the connections, cover the battery pins with VTV-1 grease
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When the ignition is off, many consumers of electricity work (radio, alarm, radio station, etc.)
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Reduce the number of consumers running on batteries. Take out the radio when you park for a long time
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Damage to the insulation of electrical circuits, leakage of current on the surface of the battery
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Check leakage current (no more than 0.01 A with consumers switched off), clean the surface of the battery with ammonia
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Short circuit between plates («boiling» electrolyte, local battery heating)
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Replace battery
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Iron salts, other impurities got into the electrolyte (accelerated battery self-discharge)
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Replace battery
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Plate sulfation due to high acid concentration or natural battery aging (small capacity)
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Replace battery
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Low electrolyte level
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If there were no cases of electrolyte splashing, add distilled water
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electrolyte on the surface of the battery
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Elevated electrolyte level
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Take the electrolyte from the battery cans with a pipette with a rubber bulb
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«Boiling» electrolyte due to battery overcharging (increased voltage in the on-board network)
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See Diagnostics of malfunctions of the generator. Wipe the surface of the battery with ammonia
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«Boiling» electrolyte due to strong sulfation of the plates or their short circuit (charge voltage is normal)
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Replace battery
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Cracks on the battery case, loose covers
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Close lids and clean vents. Wipe the surface of the battery with ammonia. Replace a cracked battery
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