Wiring diagram for the VAZ 2105 generator, old-style carburetor

Author: Ivan Baranov

The VAZ 2105 generator provides power to all consumers included in the vehicle’s electrical network, and also charges the battery during operation of the power unit. The article provides a description of the device, typical problems, ways to fix them, and also includes step-by-step instructions on how to remove and connect the unit.

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Connection diagram for generator in VAZ cars

The generator in cars is designed to generate electricity and charge the battery. If the normal operation of a car electric generator is disrupted, the battery begins to discharge and soon the car will stop starting completely - there is not enough battery charge. This device consists of a three-phase diode bridge, which, in turn, has 6 silicon diodes. Electrical voltage is created by the excitation of the rectifier at the moment when the rotor poles change under the stator windings. When the rotor rotates inside the machine stator, the poles of the rotor change. To increase the value of magnetic fluxes, the stator contains an electromagnetic exciting winding in the area of ​​the magnetic cores. Marking and designation of wires:

• P - pink.
• F - purple.
• O - orange.
• B&W - black and white.
• KB - brown and white.
• CHG - black and blue.
• K - brown.
• H - black.
• B - white.

Connection diagram for the VAZ-2101 generator

Structurally, generator 2101 consists of the following main elements:

• The rotor is a moving part that rotates from the engine crankshaft. Has an excitation winding.
• The stator is the stationary part of the generator and also has a winding.
• Front and rear covers , inside of which bearings are installed. They have eyelets for attaching to the internal combustion engine. The back cover contains a capacitor necessary to cut off the alternating current component.
• Semiconductor bridge - called a “horseshoe” for its similarity. Three pairs of semiconductor power diodes are mounted on a horseshoe-shaped base.
• A pulley on which the VAZ-2101 generator belt is placed. The belt is V-shaped (on modern cars a multi-ribbed belt is used).
• The voltage regulator is installed in the engine compartment, away from the generator. But still it must be considered part of the structure.
• The brushes are mounted inside the generator and transmit the supply voltage to the field winding (on the rotor).

Generator - performance check

Many car enthusiasts are interested in how to test a new generator that has just been installed on a car? Or how to check that the old one has already failed, although it seems to be working normally? After all, driving with a faulty generator can have a number of unpleasant consequences, the easiest of which is completely discharging the battery and stopping the car, and the most severe is damage to the on-board network and devices.

In order to test this device, you will need a tester (multimeter).

The diagnosis itself is performed in the following order:

1. Turn on the ignition.
2. Check to see if the generator/battery lights on the instrument panel come on.
3. Start the engine - if the light goes out, then everything is in order, if not, then there is a malfunction.
4. Wait until the engine warms up to operating temperature.
5. Turn on ALL electrical consumers - lights, fans...
6. We bring the engine speed to 3500.
7. Turn on the multimeter in voltage measurement mode and connect the probes to the battery.
8. If the generator is working, the multimeter will show 13 volts, if less, then there is a malfunction.
9. Without turning off the engine and maintaining speed, turn off all electricity consumers - the multimeter should now show 14.7 volts or slightly higher - this also indicates that the device is working properly.

By performing the test according to the specified scheme, you can quickly and accurately determine whether the generator is working. But, there are a number of indirect signs that may also indicate a malfunction of this device.

These include:

• the battery charging icon is constantly lit;
• interruptions in the operation of electrical equipment, flickering headlights;
• boiling of the electrolytic solution in the battery;
• Generator operation is too noisy (as a result of bearing failure).

If you detect even one of these signs, you should immediately perform a full check (according to the scheme described above). If it turns out that the generator is faulty, a new one should be installed instead. But we’ll look at which generator is better to put on a VAZ 2114 below.

Sources

• https://FokSevmash.ru/rashodniki-i-zapchasti/moshchnost-generatora-vaz-2.html
• https://RetroTruck.ru/rashodniki-i-zapchasti/moshchnost-generatora-vaz-2.html
• https://dmsht.ru/otlichiya-generatorov-dlya-vazov/
• https://kalina-2.ru/otechestvennie-avto/kakoj-stoit-generator-na-vaz-2107-karbjurator
• https://SpecTorg.su/obzory/generator-135-amper-na-vaz-2107.html
• https://RosAvto-SPB.ru/drugoe/generator-vaz-2110-pramo.html
• https://granta-service.ru/diagnostika/kakoj-generator-luchshe-postavit-na-vaz-2110-mnenie-spetsialistov.html

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Connection diagram for the VAZ-2107 generator

1 - battery; 2 - negative diode; 3 - additional diode; 4 - generator; 5 - positive diode; 6 - stator winding; 7 - voltage regulator; 8 — rotor winding; 9 — capacitor for suppressing radio interference; 10 — mounting block; 11 — battery charge indicator lamp in the instrument cluster; 12 - voltmeter; 13 — ignition relay; 14 - ignition switch.

Connection diagram for the VAZ-2108 generator

The VAZ-2108 generator has a rather massive stator winding, since it uses a large cross-section wire. It is with its help that electricity is generated. The wire is wound evenly over the entire inner surface of the stator into recesses specially provided for this purpose in the magnetic core. It’s worth talking about the latter separately. The middle part, the generator stator, consists of a series of thin metal plates pressed tightly together. They are often boiled on the outside to prevent separation.

Connection diagram for the VAZ-2109 generator

1. Alternator. The 37.3701 or 94.3701 series can be installed.
2. Negative diode.
3. Additional diode.
4. Positive diode.
5. Alternator warning lamp, also known as battery discharge lamp.
6. Instrument cluster.
7. Voltmeter.
8. Relay and fuse box located in the engine compartment in the compartment between the engine and the vehicle interior.
9. Additional resistors built into the fuse mounting block.
10. Ignition relay.
11. Egnition lock.
12. Accumulator battery.
13. Capacitor.
14. Rotor winding.
15. The voltage relay is located in the engine compartment.

Second version of the scheme

1. block headlights
2. side turn signal repeater
3. battery
4. lamp relay for monitoring battery charging
5. electropneumatic valve
6. carburetor microswitch
7. generator
8. headlight glass cleaner
9. sound signal
10. starter
11. engine TDC indicator lamp
12. engine compartment lamp
13. oil pressure warning light sensor
14. coolant temperature gauge sensor
15. fluid level sensor in the hydraulic brake reservoir
16. candles
17. windshield washer pump motor
18. distributor cap
19. distributor
20. ignition coil
21. electric motor of the pump serving the headlight washers
22. electronic control unit
23. diagnostic block (installed on some cars)
24. windshield wiper relay
25. relay-interrupter for direction indicators and hazard warning lights
26. wiper motor
27. brake light switch
28. electric motor of the heater (stove)
29. additional resistance
30. portable lamp socket
31. reverse light switch
32. Handbrake warning lamp switch
33. relay and fuse box
34. low beam headlight relay
35. headlight high beam relay
36. horn relay
37. Relay for windshield wipers and headlight washers
38. rear window defroster relay
39. glove compartment lamp
40. cigarette lighter
41. dome light switches
42. interior lamp
43. rear window defroster switch
44. hazard warning switch with warning lamp
45. warning lamp block
46. rear fog light warning lamp
47. hand brake warning lamp
48. warning lamp indicating a drop in brake fluid level
49. windshield wiper and washer lever
50. handbrake warning lamp relay
51. horn switch
52. outdoor light switch
53. turn signal switch
54. headlight switch lever
55. egnition lock
56. instrument light switch
57. rear fog light switch
58. instrument cluster
59. warning lamp indicating insufficient oil pressure
60. fuel reserve warning lamp
61. fuel level indicator
62. battery charging warning light
63. water temperature indicator
64. instrument lighting lamps
65. voltmeter
66. speedometer
67. indicator lamp for turning on external lighting
68. turn signal indicator lamp
69. high beam warning lamp
70. three-position heater fan switch
71. rear window defroster
72. fuel level and reserve indicator sensor
73. rear light block
74. license plate lights VAZ 2105

How to check the generator yourself

How to check a VAZ generator using the example of model 2109. Generator type 94.3701 alternating current, three-phase, with a built-in rectifier unit and an electronic voltage regulator, right-hand rotation.

Generator connection diagram . The voltage to excite the generator when the ignition is turned on is supplied to terminal “D+” of the regulator (terminal “D” of the generator) through indicator lamp 4 located in the instrument cluster. After starting the engine, the excitation winding is powered by three additional diodes installed on the generator rectifier block. The operation of the generator is controlled by a warning lamp in the instrument cluster. When the ignition is turned on, the lamp should be on, and after starting the engine, it should go out if the generator is working. If the lamp is brightly lit or glows half-lit, it indicates a malfunction.

The “minus” of the battery should always be connected to ground, and the “plus” should always be connected to the “B+” terminal of the generator. Failure to turn the battery back on will immediately cause increased current through the generator valves and damage them.

It is not allowed to operate the generator with the battery disconnected. This will cause short-term overvoltages to occur at the “B+” terminal of the generator, which can damage the generator voltage regulator and electronic devices in the vehicle’s on-board network.

It is prohibited to check the functionality of the generator “for spark” even by briefly connecting the “B+” terminal of the generator to ground. In this case, significant current flows through the valves and they are damaged.

Criteria for choosing car generators

1. Maximum power. Power is one of the main characteristics of VAZ generators. It must ensure an uninterrupted supply of current and supply electricity to the battery, which is discharged due to the operation of regular electricity consumers at low speeds of the power unit. To perform basic tasks, the device must have the required power. The required indicator is indicated in the vehicle operating instructions.
2. Current strength. The factory generator installed in the car is not designed for a large number of additional consumers, but at the same time it has a certain reserve. If the autogenerator is “not enough,” then before purchasing a new device, first inspect the old equipment, clean the contacts, check the bearings, etc. You shouldn't use 120A generators in every car. First of all, it's expensive. Secondly, the current may be excessive. Such power-generating devices are installed in tuned cars with a powerful acoustic system.
3. Dimensions. Before purchasing, it is also worth comparing generators by overall dimensions. The device must be compact with high technical characteristics.
4. Noise level. The generator should not make too much noise during operation. This “disease” often affects high-power generators that are sold at a low price. One of the main reasons for the appearance of extraneous sounds (hum) is the poor quality of bearings, which wear out quickly.
5. Availability of guarantee. If there is a warranty, you can exchange a faulty device for a new one if it is defective.

Replacement and removal of the electric generator

The generator on a VAZ car is removed either for complete replacement in case of failure or to carry out repair work to replace faulty parts. To perform dismantling, prepare a standard set of tools; it is advisable to drive the car into the inspection hole.

1. Disconnect the battery.
2. Remove the protective rubber cap from terminal “30” and unscrew the nut and remove it from the wire stud.
3. Disconnect the block with wires from the generator connector.
4. We loosen the tightening of the generator to the adjusting bar, then lift it all the way up to the cylinder block and remove the belt from the pulleys.
5. Completely unscrew the bolt securing the adjusting bar to the cylinder block, then from the bottom of the car unscrew the 2 bolts securing the lower bracket to the block and remove the generator, pulling it out of the engine compartment.

Source

Technical specifications

If the old generator fails, many motorists wonder which generator they should now replace the old one with.

There is no need to invent anything here. The most correct solution is to install the same generator as before, or a more powerful one.

Today, the VAZ 2110 provides for the use of three types of power supply devices:

1. Katek 5102.3771. The generator produces 80 Ampere power and its voltage is approximately 14V.
2. Katek 94.3701. This is a device with the same parameters. They are not seriously different.
3. Catek 120 amp. A generator that is more adapted to modern realities, when in addition to standard electrical equipment, motorists install many additional devices.

If you have a powerful audio system in your car, you use an electric pump powered by the car, as well as a number of other additional consumers, it is recommended to install a 120-amp unit instead of a standard 80-amp generator.

If we take into account the size of the devices, then we can distinguish between ordinary and compact ones. They have a certain difference in design

To be specific, the differences are in the following components:

• Brackets;
• Anchor;
• Excitation wire;
• Drive pulley;
• Number of mounting bolts.

But in reality this does not play a special role. After all, the structure of all generators used for the VAZ 2110 is the same. Therefore, let's look at the circuit and structure of this unit.

The presented device is relevant for all generators used on the VAZ 2110, regardless of their power - 80-120 Amperes.

Margin of safety

If we take into account the standard Katek generator, which is installed on domestic dozens, then its resource is enough for about 10 years of operation or 140 thousand kilometers. The specified safety margin of the device can only be relied upon if it is handled properly

The specified safety margin of the device can only be relied upon if it is handled properly.

Many people fear that a powerful 120 A generator can negatively affect the condition of the battery. In practice, nothing like this happens. Moreover, installing a more powerful unit is recommended if you plan to install an impressive audio system or video equipment on the car.

Connection diagram and repair of the VAZ 2105 generator

This is the unit we are talking about

To provide electrical energy to the electrical appliances of the VAZ 2105 car, as well as to recharge its battery while the engine is running, there is a generator in the car. Until 1987, the VAZ 2105 was equipped with units of the G 222 model, and later with the 37.3701 model. In both cases, the generator is a three-phase electrodynamic device in which the sinusoidal voltage of each phase is rectified using a built-in rectifier. This part is a three-phase diode bridge of a VAZ generator, consisting of six silicon diodes. The voltage is produced by exciting the rectifier by the three stator windings when the rotor poles change underneath them. The rotor poles change polarity as it rotates inside the stator, and to increase the value of magnetic fluxes, it has an electromagnetic excitation winding inside the magnetic cores. The rotor rotates through a belt drive from the front pulley of the engine crankshaft (injector) together with the pulley of the cooling system pump.

Features of the generator device

The generator housing consists of two covers made of aluminum alloy, tightened with four bolts and nuts, between which a round stator core is clamped. Rotor bearings are installed in the covers: the front one is in a through bearing, the rear one is in a blind seat of the cover. The rotor rotates inside the stator and housing on two bearings. The front end has a slot for a key and a thread for the fan nut. An adjusting washer is installed between the front rotor and the front bearing, which is often forgotten to be installed when repairing the generator. At the rear end of the rotor shaft, in front of the rear bearing, two copper slip rings are pressed in, insulated from the shaft and connected to the ends of the field winding.

A BPV6-50 rectifier is installed to the inside of the back cover. It consists of two horseshoe-shaped aluminum buses insulated from each other, into which three silicon diodes (valves) of the BA-20 type are pressed. The internal bus is isolated from the housing, but is connected to the generator terminal bolt “30”, while the other has contact with ground. The legs of the diodes in pairs from each bus are bolted to the ends of the phase windings of the stator, and their other ends are connected together - a star connection. In the G 222 generator, a wire goes from this point to a terminal on the back cover, from which a wire goes to terminal “85” of the RS-702 type charge indicator relay. There are no wires at 37.3701 from the common point of the phase windings.

Brushes are pressed to the contact rings of the rotor by springs, one of which is connected to terminal “B”, and the second to terminal W of the voltage regulator installed on the brush assembly in the upper rear part of the generator. In 37.3701 there are three diodes connected at one end to the phase windings, and the second are connected to one point, the wire from which goes to the regulator relay terminal Sh and terminal “61” on the rear surface of the generator. The diodes are connected in such a way that they pass positive half-cycles to pin “61”.

The electronic voltage regulator is non-separable and since 1996 has been installed in a metal case riveted to the brush holder. A capacitor is mounted between the housing and terminal “30”.

Generator connection diagram

To control the battery charge level in a VAZ 2105 car, it is necessary to monitor the output rectified voltage, which is maintained within 13, June 14.2 V. The regulator relay compares the voltage in the vehicle's on-board network with the reference one and, if this level is exceeded, reduces the voltage on the exciting winding , increasing the resistance between one of the rotor brushes and the “ground”. When the voltage in the vehicle network decreases, the regulator lowers the resistance, increasing the current in the field winding and, accordingly, the voltage at terminal “30”. Such cyclic processes occur at a frequency of 50-250 times per second.

Basic malfunctions and ways to eliminate them

You can check the VAZ 2105 generator injector for serviceability on the car without removing it from the engine. Problems can be identified using diagnostics, using the diagram, and then eliminated (author of the video - Autoelectrics HF).