Replacing the prior voltage regulator without removing the generator

Step-by-step replacement of generator brushes

replace worn brushes without removing the generator from your car. However, according to experts, this process will be much simpler if you remove the generator from its permanent place before replacing it. After the generator is removed, the replacement process is performed in the following order:

• using a screwdriver, remove the cover made of plastic to protect the generator in order to be able to get to the brushes;
• the connecting plug with wires is disconnected from the brushes;
• two fixing fasteners, which are located at the edges of the elements being inspected, are carefully unscrewed;
• using a size 13 wrench, unscrew the fixing bolt in the center of the element;
• after all the fasteners have been unscrewed, the brushes should be removed to inspect their external condition and replace them.

Read

Instructions for cleaning and lubricating IACs on Priora: detailed description of the process

In what case can a faulty idle air control regulator be repaired? Then, when this element is fully operational, and there is only contamination of the device rod. The cleaning procedure is not complicated and takes little time. To perform the cleaning procedure, you need to perform a number of the following manipulations:

1. Remove the device from the car.
2. Inspect his condition. The presence of play is unacceptable, and if such signs are detected, we immediately replace the product.
3. If the rod needs cleaning, then it must be removed and the appropriate manipulations performed. The easiest way to remove the rod is to connect the power supply to it and turn on the ignition of the car. The rod will come out and simply separate from the rotor.
4. Next, we evaluate the condition of the worm gear. If everything is in order, then clean the stem.

5. Having cleaned the rod, we proceed to washing the inside of the rotor. To do this, we use kerosene, diesel fuel or WD-40, which needs to be used to treat the inside of the rotor. Carry out the procedure carefully so that liquid does not get on the stator winding, thereby damaging the insulation.
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6. After completing the above steps to clean the rod and seat in the rotor, you can lubricate it. Lubrication is needed to ensure smooth movement of the rod. To do this, we use regular Vaseline or technical lubricant for electrical devices. It is strictly contraindicated to use solid oil, litol, etc. Carefully lubricate the surface of the rod where there is a worm gear.

7. It will not be superfluous to lubricate the bearing. To do this, we use a syringe with a needle and regular motor oil. Carefully lubricate the inside, and then proceed to the assembly stage.

8. In order to install the rod in its place, it is recommended to additionally use a clamp. We screw in the rod, and after its threaded part is completely immersed in the rotor, it should be clamped in a clamp. We preliminarily control the position of the guides. After this, turn on the ignition. The rod will begin to move out and will automatically be pressed onto the rotor. Repeat the procedure several times until the rod in the extended position reaches a distance of 28 mm from the seat.

This completes the procedure for cleaning, lubricating and assembling the idle air regulator. It is suggested to watch a video where the author shows in detail how these manipulations are performed.

It is important to note that such manipulations with the IAC are recommended to be performed only in exceptional cases when the part can actually still serve. Otherwise, it is recommended to replace it immediately.

What signs will indicate that the generator brushes are faulty?

The following external signs will help you understand that the generator brushes have become unusable on a Priora with power steering or air conditioning:

• length of the element being inspected;
• if upon inspection it is discovered that the length of the brushes is less than 5 mm, they must be replaced;
• Replacement also be required if the appearance of the brushes indicates uneven wear, that is, one element is heavily worn out, and the second is brand new. Uneven wear of these elements will certainly negatively affect the operation of the generator, so experts recommend replacing them without fail.

The cost of new components for the Priora does not exceed 150 rubles; of course, you can also find cheaper brushes for the generator, but it is unlikely that such elements will serve faithfully for a long period of time, and such savings will lead to a repeated procedure for replacing these components.

general description

In principle, the Priora generator is not bad. But its power is not enough on luxury models with installed air conditioning. You may hear advice to install an additional diode bridge. But, unfortunately, this option is suitable for those who understand electrical circuits and are comfortable with a soldering iron. The easiest way is to install a three-level voltage regulator.

First you need to check the operation of the generator. Measure the voltage at the positive terminal of the generator and the battery terminals. Without load, the voltage should be at least 13.8 volts, under load - at least 13.5. An ideal option at low temperatures in winter is 14.8-14.3 volts. If there is a difference in the readings, then the contact at the generator output should be cleaned. This can be done with a wire brush or sandpaper. If the parameters are below acceptable values, then you should check the condition of the brushes on the generator and think about replacing the voltage regulator.

Brush mechanism with relay regulator

On older models of generators, the brushes that transmit current to the rotor winding to create an electromagnetic field that generates electricity could be replaced individually. They were installed in a special device - a brush mechanism, from where they could be easily removed. In modern generators, brushes are mounted complete with an electronic device - a relay regulator. The relay regulator is designed to equalize the voltage supplied to the vehicle's electrical system. A transistor with a threshold for turning off the excitation voltage is built into the relay circuit. He is able to change it depending on the engine speed and, accordingly, the generator. The fact is that without a regulator, as the speed increases, the voltage jumps to 16-18 V, which can lead to failure:

• side lighting lamps;
• low and high beam;
• instrument lighting;
• electric motors of various components.

Generator device

The pulley transmits energy from the motor to the shaft using a belt.

Covers on the housing are needed to accommodate the rotor supports, install the unit on the motor and secure the stator. The back cover is needed for the brush assembly and outputs for powering electrical equipment. The stator produces power through a three-phase winding. The rotor is a steel shaft with two bushings. The terminals of this winding are connected to copper rings. The regulator stabilizes the voltage under various factors:

rotor speed delta;

temperature changes in nature.

The brush assembly is a plastic element with brushes attached to it that interact with the rotor rings. The electric generator also includes six diodes (three in “-” and three in “+” heat sinks).

Malfunctions of the relay regulator

Most often, the malfunction of the brush mechanism with a built-in regulator is the failure of the semiconductor transistor, a break or a short circuit to the housing. It is also possible for the graphite brushes themselves to wear out or break. This is characterized by a drop or complete disappearance of the charge current. On the Priora this can be seen not only by the battery indicator lamp, but also on the mini display of the instrument panel. It has a charging voltage monitoring function.

The brush mechanism of the generator on the Priora cannot be repaired. In case of any breakdown, you only need to replace the brush assembly.

The process of setting the parameters of the idle air control on a Priora

After replacing the IAC on a car or removing the standard device to check it, it is necessary to perform a procedure called setting parameters or resetting the counter. The procedure is quite simple, for which you should do the following manipulations:

1. Turn on the ignition for 5 seconds, then turn it off.
2. Turn it on again and then turn it off.
3. Start the engine and warm it up for 5 minutes.
4. This is quite enough to set the IAC parameters.

After this, we monitor changes in engine operation. The improvements indicate that the IAC was indeed faulty.

In conclusion, it should be noted the importance of the device discussed. On Priora, IAC is often the cause of floating speed. And often the reason is hidden not in the quality of the product, but in a clogged valve, which, due to deposits, cannot efficiently open the channel by the required amount of steps. The reason for its contamination is dust when the filter is not replaced in a timely manner, as well as crankcase gases that adhere to the surface of the IAC. However, oil deposits are not as dangerous as dust entering the collector. Make it a rule to change the air filter in a timely manner in order to increase the service life of not only the IAC, but also the entire engine as a whole.

How to replace brushes on a Priora generator without removing it

All dynamos installed on Russian Priors are convenient in that the brush mechanism can be replaced without removing the unit itself from the car. This is not a very complicated operation, accessible to almost any car owner who knows how to hold tools in his hands. The replacement is carried out in several stages.

1. Battery disconnection.
2. Removing the power wire with a 10mm wrench from the generator.
3. Disconnecting the test lamp input from the connector.
4. Removing the rear plastic cover with snaps.
5. Using a screwdriver or wrench, unscrew the 2 bolts or nuts securing the brushes.
6. Replace the brush mechanism with a new one, connecting the wires.
7. Reassemble in reverse order.

After replacing the generator brushes, be sure to measure the flow of charging current to the battery with a voltmeter and compare it with the readings on the Priora instrument panel. We need to make sure that its work is objective.

In the video you can watch a repair involving the replacement of a relay with brushes on a Priora generator:

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Comments 41

And don’t throw away the old TRT; it’s easier to rearrange the brushes than to find a replacement if the car already has CAN.

TRT5-01 is a regulator with the ability to control generator voltage via the DFM bus. It contains the Bosch control protocol. On the new Priors, this control bus is activated and the brains that control the engine can control the generator by adjusting the voltage when the voltage drops to idle. Regulators 897.3702 are equally capable of working with generators of the entire line from 800 to 135 amperes, the main parameter is 5 amperes, this is the current that is supplied to the rotor through the excitation brushes, by commutating it the regulator maintains the generator voltage within the required limits. But TRT05, in the absence of a control signal, which was not present on the previous generation Prior, keeps the voltage in the middle position. Due to the absence of this output in 897.3702, it cannot work on new Priors, in which both control (DFM) and power supply (L) are supplied from the ECU. In this case, circuit L is a lamp in the original version, through which, when the ignition is turned on, the power supply to the entire LV circuit is connected in the ECU to the output of the driver, which, when power is supplied to the system, the engine turns on the voltage regulator. And not as in the old scheme, through the charging lamp in the dashboard. Now the charging lamp in the dashboard is turned on by the processor in the dashboard, which receives a signal from the engine ECU via the CAN bus. a bunch of wires were replaced with a computer bus of two wires. Those. on new machines, in the parameters displayed by the scanner during diagnostics, there is also a generator control parameter in %. At the same time, only TRT5 should be installed on new RN generators - the entire old line of domestically produced regulators does not yet have a DFM bus. If you install it instead of TRT5, then there may be problems with the LV power not being turned off when the ignition is turned off, since the L bus from the ECU does not carry pure zero, but some kind of residual voltage and it is possible to drop the battery to zero. You can trick the relay by breaking the circuit using a relay, but you can also get glitches with a charging lamp.

Priora fuse box diagram

* - for the “Norma” configuration with air conditioning and “luxury”

Blocks under the hood

Fuse box

This unit is located next to the battery.

Photo - diagram

Description Option 1

Description Option 2

Relay and fuse box

It is located next to the fuse box and is covered with a protective cover.

Option 1

Appointments

1. Right electric fan power supply fuse (30 A)
2. Left electric fan power supply fuse (30 A)
3. Right electric fan relay
4. Additional relay (sequential activation of left and right electric fans)
5. Left electric fan relay
6. Heater fan power supply fuse (40 A)
7. Compressor power supply fuse (15 A)
8. Heater fan relay
9. Compressor relay

Option 2

Designation

1. Heater fan maximum speed
2. Right fan
3. Fan sequential relay (low speed)
4. Left fan
5. Left fan fuse (low speed)
6. Right fan
7. Heater fan
8. Compressor
9. Heater fan
10. Compressor relay

Generator relay Lada Priora 2170 (Lada PRIORA)

Found an error in the compatibility of a spare part with a car? Report it to our specialists.

AutoPro experts know additional configurations:

• Generator regulator relay, (charging relay) standard equipment: VRR0110, 21103701500, AVR37803O7
• Generator voltage regulator relay type: Bosch; Generator current, A: 80-120: 230994, F00M145352, 130603, 082988352, IB230, 333569, 82988352, IB230
• Generator regulator relay type: Iskra/Letrika; Generator current, A: 45-80: 134861, 139513, IK543, VRIK149, 130511, ARE9008
• Relay regulator (voltage) type: Bosch; Generator current, A: 80-140: 9459741, 232927, 8637851, IB229, VRB221, BOR229, F00M145369, F00MA45211, 130604, 237267, F00MA45207, VRB369, CQ1010468, C Q1010468, IB229, KO7501543, ARE0041