2.8. Diagnostics of malfunctions of the generator

Cause of defect

Elimination method

The control lamp of the category of the rechargeable battery lights up at the working engine

The belt of the pump of cooling liquid is badly tense or torn off

Tighten or replace a belt

Tension regulator is damaged. For check use two sources of a direct current of 12 and 15 V (see Electric equipment) or replace the regulator obviously serviceable

Replace the faulty regulator

The chain "a combination of devices – a conclusion of "61" generators" is faulty

Check a wire of "CB" from a combination of devices to a conclusion of "61" generators. Smooth out the oxidized contacts, press out plugs

Brushes hanged or are worn out, contact rings of a rotor are oxidized, there is no contact between conclusions of brushes and the regulator of tension (the generator gives the put tension only on high turns at small current of return). The winding of excitement of a rotor is not damaged – resistance between contact rings about 4 Ohms (it is measured after a regulator detachment)

Smooth out contact rings a glass skin, check lack of a beating. Eliminate lag of brushes, at their wear replace tension regulator

Tap of conclusions of a winding of excitement from contact rings, short circuit or break in a winding (the generator gives the put tension only on high turns at small current of return). Resistance between contact rings less than 3 Ohms or infinity (it is measured after a regulator detachment)

Replace a rotor of the generator or the generator assembled

Break or short circuit in a stator winding, its short circuit on "weight" (at short circuit the generator howls)

Check an ohmmeter a winding. Replace the stator or the generator assembled

Damage of the main gates of the vypryamitelny block

Replace the vypryamitelny block

Damage of the additional gates of the vypryamitelny block (feeding an excitement winding), at the same time the generator gives the put tension only on high turns at small current of return. Gates are checked by an ohmmeter after dismantling of the generator

Replace the vypryamitelny block

The control lamp of the category of the rechargeable battery does not light up, but the rechargeable battery is charged badly (hardly scrolls the engine at start-up). Tension in onboard network lower than 13,6 In

The belt of the pump of cooling liquid is badly tense

Tighten or replace a belt

Too many powerful consumers of the electric power are included, especially at low turns of the engine. Short circuit in consumers (usually it is windings of electric motors)

Limit use of powerful consumers idling, do not connect additional consumers over the admissible power of the generator, check windings of electric motors for lack of short circuit

Fastening weakened or tips of wires on a conclusion "plus" the generator or the rechargeable battery are oxidized

Smooth out plugs and tips, tighten connections

The control lamp of the category of the rechargeable battery blinks during the operation of the engine. The rechargeable battery is recharged (electrolyte level quickly goes down). Tension in onboard network of the car higher than 14,7 In (lamps often fuse)

Tension regulator is faulty

Replace the regulator

Bad contact between "mass" of the car and "mass" of the regulator of tension

Smooth out the oxidized surfaces, tighten fastenings

The control lamp of the category of the rechargeable battery does not light up at inclusion of ignition

The lamp fused

Replace a lamp

The safety lock No. 2 fused

Replace a safety lock, remove the cause of its burn-out (check the protected chains an ohmmeter)

Break in a power-supply circuit of a combination of devices

Check operation of the switch of ignition, the ignition relay, a wire of "" from the ignition switch to the ignition relay, a wire of "GCh" from the ignition relay to the block of safety locks, a wire "About" from the block of safety locks to a combination of devices and the wire of "H" connecting the last to "weight". Smooth out contact surfaces, press out plugs. Replace the faulty relay, the ignition switch (or its contact part)

Noise of the generator

Generator bearings (squeal, howl), wear of a seat in a generator cover are damaged. (Noise remains at disconnection of wires from the generator, but disappears if to take off a belt)

Replace bearings or the generator assembled

The rotor touches the stator

Check a rotor shaft beating, wear of bearings and seats. Replace defective parts or the generator assembled

Fastening of a pulley of the generator weakened

Tighten a fastening nut

Short circuit in a stator winding, its short circuit on "weight" (the generator howls). Noise disappears if to disconnect wires from the generator

Replace the stator or the generator assembled

Short circuit in one of the main gates. Noise disappears if to disconnect wires from the generator

Replace the vypryamitelny block

Scratch of brushes

Slightly smooth out contact rings a glass skin, wipe with the rag moistened in gasoline, check lack of a beating.