Advice 1: How to check voltage regulator alternator

Low revolutions of the crankshaft when the engine starts, dim headlights (especially when high beam is activated the light) indicate faulty operation of the generator of the car. Check it out and find the faulty component can be done in several simple ways.
How to check voltage regulator alternator
You will need
  • - brush unit with a built in integrated voltage regulator;
  • - the voltmeter;
  • - external voltage regulator;
  • - backup generator.
Instruction
1
Modern cars generators produce three-phase alternating current which is rectified by a built-in diode bridge. In some models of generators in the brush knots are embedded integral voltage regulator. In other models, the voltage regulator is external, it is located in the engine compartment of the vehicle and connected to the brush site generator.
2
To test the operation of the voltage regulator in the car turn it the ignition system. Check with a voltmeter the voltage at the plus output relay control. It should be equal to the voltage of the vehicle battery. If there is no voltage, check supply circuit from the battery to the ignition switch, the ignition switch, the power supply circuit from the ignition switch to the relay voltage.
3
Then check the voltage coming out of relay - voltage regulator. Do it on the terminal of the brush unit of the alternator. So you check for faulty circuit from the regulator to the alternator of the car. When the vehicle engine stopped, the voltage should be equal to or greater than 8 Volts. In the absence of this voltage check circuit from alternator. If the circuit tests normal, replace the relay-voltage regulator.
4
If the car is equipped with generator with built-in brush unit to its integrated voltage regulator, with the ignition on check whether voltage of 12 Volts to the terminal of the brush unit. If the voltage goes and the generator doesn't work – replace the brush unit with built-in IC voltage regulator.
5
Start the engine of the vehicle. Lift the crankshaft revolutions to 3000 rpm Measure the voltage at the plus output of the generator. It should not come out of the limit of 13.8 to 14.2 Volts. Turn the headlights on in high beam mode. Again measure the voltage at the generator output. It can be reduced, but not below a 13.3 Volts. In this case, the voltage regulator is defective.

Advice 2: How to check serviceability of the generator

The automotive alternator is designed to maintain battery charge and to power the electrical components in the car: tail lights, onboard computer, air conditioning and others. The generator provides the many components of a modern car, in regard to it apply extraordinary security measures and carefully check.
How to check serviceability of the generator
Instruction
1
Prior to the inspections, remember that it is strictly forbidden to disconnect the generator from the battery when the engine is running. This will cause a power surge could damage the rectifier unit of the generator.
2
Check the generator on the stand. This will allow you to figure out whether its parameters nominal characteristics. Be careful to check the generator brushes were well lapped to the slip rings. They, in turn, must be clean.
3
Turn on the motor from the stand, set using the variable resistor the output voltage at 14 Volts. Bring the frequency of the rotor to 5000 rpm. After 2 minutes check measure the current. If the generator is working properly, then this figure will be at least 44 A. If the current is less, then check coil and valve, to determine the location of the fault. To do this, measure the amperage on a warmed-up generator. Let it work about 15 minutes and then measure the current that must be at least 42 A.
4
Test generator with the oscilloscope. Install the rotor rotates with a frequency of 1500-2000 rpm. The field windings connect to the battery and from the output of "30" will disconnect the power. Now, notice on the screen and on the waveform, check for a faulty generator. If everything is in order, then the curve has a sawtooth shape with uniform teeth. If there is an open in the stator winding or taps, the teeth are not uniform, and there are deep hollows.
5
Measure the resistance between the plug 67 and a ground to the generator. This will allow you to determine the condition of the field winding. In good condition the resistance should be in the range of from 4.2 to 4.7 Ohms. The measurement is temperature dependent, so measurements are required at 20 °C.
How to check <b>health</b> <strong>generator</strong>

Advice 3: How to check whether the generator

A modern car is immobilized without a working generator. Drive to the garage or service does not always work. The conclusion: avoid breakage of the generator. The generator is quite reliable and rarely goes down.
How to check whether the generator
Instruction
1
If you do not go into technical details, the device is as follows: the most common three-phase alternating-current generator consists of a stator (the casing is fixed inside the coil) and rotating inside the rotor. Battery current is supplied to the rotor winding of the generator and creates a magnetic field. For supplying current to the rotor is designed with the collector brushes. Given that the entire car's electrical system is direct current, the generator is built into the body of the rectifier.
2
During THE generator check the voltage at the terminals of the generator and the condition of the drive belt. For overload protection in the electrical system of the car is transistorised relay-regulator, often mounted on the body of the generator. Often used hinged generator installed outside the power unit and the driven belt. This is the most convenient in maintenance and repair of the form of the generator.
3
Work generator check lamp the battery (on the dashboard). The normal generator and an electrical system of a car this light should be illuminated along with other indicators at ignition on, and off immediately after starting of the engine. Any other behavior of this indicator signals the presence of faults. Among these faults may be: discharged battery, break the circuit breaker contact to ground, the burning of the fuse or the lamp, failure of the generator. The generator may be a poor contact commutator brushes or breakage relay-regulator.
4
If the control indicator the battery is switched on and off, in addition to these faults can be: loosening or breakage of the drive belt of the generator or failure of the rectifier unit. The latter may be accompanied by failure of the relay-regulator. For a more thorough check of operation of the generator please refer to the technical station, which has a special stand for testing of generator.
5
If the car has significant mileage, wear of rotor bearings. This leads to poor contact of the brushes. The test lamp will turn on and constantly work with the weak flashing.
6
Blinking charging indicator battery may indicate different faults. With small defects can go a long time without significant consequences. A fault, e.g., the relay-regulator can cause a short circuit in the generator and its subsequent replacement. To determine the cause of failure in traffic conditions is quite difficult. In most cases this can be done by loss of battery capacity. On older cars more opportunities for fault detection provided installed voltmeters. For modern cars only one solution – go for a HUNDRED until I finally got the battery.
7
Check all circuits of a modern car can only be a HUNDRED. To repair the generator difficult. Unable to tighten the nuts, tighten or replace drive belt, dry contacts. Do not change by yourself the generator, the cause may not be in it. Exception: the worn-out generator (defined by a specific noise).
8
When the need arose to repair the generator on the road, disconnect it, remove and disassemble. A frayed coil wire connect the stripped ends and tape. Subsequently, the coil be sure to replace. If swallowed, generator, dirt, or oil, remove the brushes and rinse them in gasoline. Then dry. Collector treat fine sandpaper, then wipe clean.
Useful advice
When removing the wires from the battery when the engine is running can damage the alternator and all on-Board electronics.

Advice 4: How to check battery voltage

Measure the voltage of the battery (battery) is very simple. It does not need to seek the assistance of specialists or to go to the service station. To judge the degree of charge of your battery, enough to know a few subtleties.
How to check battery voltage
You will need
  • - a multimeter or voltmeter DC voltage;
  • - hydrometer.
Instruction
1
Measuring the voltage of the battery without nagruzki this drain leads connected to the output terminals. Now take a multimeter and set it to the limit "- 20V". This will allow you to measure the voltage value with maximum precision. The red wire of the device connected to the terminal marked "+", black to "-". The readings must be greater than or equal to 12.6 V.
2
If the voltage was less than normal, you should:1. To check the electrolyte density (not less than 1.26 g/cm3). If necessary top up with distilled water, thereby restoring the desired density.2. To recharge the battery.
3
The measurement values of battery voltage under negrophilia that you need to connect the wires to the output terminals of the battery, start the engine and set the rotation speed of 1500-2000 rpm, and turn on the high beam headlights. Next, similarly to step 1, measure the voltage on the output terminals. The readings should be within 13,9-14,3 V.
4
Depending on the results, we can draw the following conclusions:1. If the value of voltage less than normal, it means the battery charge is insufficient. However, you must make allowances for the age of your battery, as well as the mode of operation of the vehicle.2. If the readings were more normal, then your battery is recharged. In this case, it is necessary to produce partial discharge (until the voltage value reaches the norm).
Note
Recharging of the battery may lead to increased consumption of water in individual elements of the battery, and also to premature wear.

Advice 5: How to check the generator VAZ 2115

The unpleasant consequences of generator failure are obvious: stops charging the battery, which falls all the on-Board load. But it's not so bad: increased the tension threatens to damage the entire electronics of the car. However, do not hurry to buy a new device - in some cases it is enough to replace some of its elements, that will cost much cheaper.
How to check the generator VAZ 2115
In the design of the generator ВАЗ2115 includes, in addition to rotor, stator, relay controller with valves (diode bridge). To determine which item is to blame for the failure of the alternator (or bad his work), you can first check on the car, without removing the generator.

Relay-regulator



To test the regulator you will need an assistant. Ask him to start up the engine and bring the rpm to 3000. It should include dimensions with a headlight, "stove", the rear window demister. Measure with a tester the battery voltage, which should exceed 13.2 V (alternator 9402.3701) or 13.6 In (37.3701 generator). At a voltage significantly below this value, then the "fault" of the generator windings (short, open), relay controller, or no contact on the rings of the field winding (due to oxidation). Indirectly, you can determine the fault relay of the controller when enabled, the high beam (the other users must be off). To do this, again measure the voltage, which should comply with the same at 13.2 or 13.6 V.

Safer to determine the efficiency of the regulator removed the generator and relay-regulator. Take a 12V test light and connect it between the brushes. At the same time apply 12V DC from a suitable power supply by connecting the plus to the terminal "D+" and minus the weight of the car. The lamp should illuminate. At a smooth voltage increases to 16V it will go out. If it does not, in any case, the regulator will have to change. If you have a generator brand 37.3701, plus DC voltage should be connected to the contact "B" and "C", and minus to ground.

Valves (rectifier) generator



To control enough of the battery and a test lamp. Connect the plus battery through a test lamp to the terminal "B+" on the alternator (if 37.3701, then to terminal "30"), negative to the body. Burning lamp indicates a break out or short circuit the block valves (both negative and positive). To verify the serviceability of the unit plus valves, connect using a test light, plus a battery with the same terminal ("In" or "30"), minus any phase winding. Burning lamp speaks of the breakdown of one of the valves.

Check the negative valves (diodes), if you connect through the lamp any phase winding with the weight of the generator housing). The burning of the lamp indicates the circuit of the windings of the stator housing of the generator or the breakdown of one of the valves. Each of them can be checked with a tester (ohmmeter), but we'll have to disconnect one of the contacts of the diode. To change the rectifier Assembly better; be recommended by a specialist workshop.

Advice 6: How to clean the IAC

If the car stalls on the move or immediately after starting of the engine, and the number of revolutions of the unstable idle speed varies from 700 to 2000 will help flushing controller idle move and install the oil separator.
How to clean the IAC
You will need
  • liquid for washing of carb
  • - lubrication "liquid key"
  • - hex wrench
Instruction
1
With the suction port of the air manifold remove the two clamp. One clamp in the place where the body is connected with the air filter, the other at the junction of the housing with the air supply unit through the choke.
2
Then disconnect the pipe from contact sensors of the racesspeed and air temperature. Remove the valve cover pipe ventilation of crankcase gases. To identify this pipe can be in appearance: it is wider in diameter.
3
Disconnect with regulator idle speed contact. Then, after removing the intake tract, remove the regulator, which is mounted on a pair of M6 screws with internal hexagon.
4
From regulator idle speed loosen the solenoid, which is a control valve.
5
In the chamber, pour liquid to flush the carb. After a few minutes, drain and pour the liquid again. Repeat this process until until pour from the chambers the liquid is bright.
6
Take the solenoid and connect it to the pulse generator. Set the voltage of 12 V, a frequency of 1 Hz and turn on the power. Position the electromagnet vertically, pointing the hole upward.
7
At that time, as the core of the solenoid will move, spray it in the liquid for flushing the carb. Repeat the fill fluid multiple times through every 1 – 2 minutes.
8
After five minutes turn the electromagnet and allow to drain remaining liquid. Again repeat the operation for flushing the core, achieving thus its free movement.
9
Carefully blow out the solenoid and the controller with the help of the compressor. The inner side of both parts apply penetrating lubricant, use "Liquid wrench".
10
Connect the electromagnet with the valve block. With the battery feed several times the voltage at its contacts. The solenoid should trigger movement of the valve and a distinctive click. So you check the quality of the wash and health connections.
11
All parts assemble in the reverse order, then start the engine.
Note
Don't forget before starting work on flushing the drain with the battery terminals!
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