Let's start with the fact that during operation on many cars, drivers notice a radio failure when starting the engine, turning off the head unit of the GU for a few seconds, followed by automatic switching on, etc. Note that this often happens with non-standard car radios, that is, when the head unit is in a third-party car.
Moreover, this situation in the vast majority of cases is not a malfunction, but the possibility of malfunctions should not be completely ruled out either. In this article, we will talk about why the radio turns off when the engine is started and the dashboard lights dim.
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When starting the engine, the radio turns off: reasons
So, the owner gets into the car, turns on the instrument lighting and radio, and then turns the key in the ignition. , while the backlight of the devices dims to a greater or lesser extent, and the GU turns off and restarts until the start of work itself.
As a rule, this happens if the engine is not yet warmed up. If, in the future, the launches are repeated, but already “hot” or after a slight preheating of the motor, the radio does not turn off.
It is important to understand that at the time of starting the power unit, the starter is activated. This device is actually an electric motor that takes energy from for scrolling. In this case, the starter is a powerful energy consumer. Simply put, during the operation of the starter, a sharp and rather strong decrease in voltage occurs in the vehicle's on-board network.
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Answer: When starting the engine, the radio is cut downIf you have a higher technical education and you work with electronics - will we discuss it?
Yes, pickups can even come from nearby wires, from their vibration, if there is one broken one, have you heard of contact bounce?
Why, the capacitor there smooths out voltage ripples (do you even know what the capacitance of a capacitor is, or are they only divided into large and small ones for you, compared ... with a finger), and does not increase its static values, I saw starting capacitors on army trucks, here this one can spin the starter, grab it, and I for the one in the ecu, just make a will first. If a powerful conder hits the ecu, this scumbag at the entrance will not even have time to fart before dying. One weirdo was lit (the condenser was installed) is always fine, now running through the showdowns. Although he doesn’t have a fig of what burned out in his brain.
Or do you seriously think that the magnet needs a welding wire to be powered? Do you think it will help with a drawdown or a dead acc?
This is ALL THE COLLECTIVE FARM, kroilovo leads to the popadalov ... On what machine I already tear out this collective farm wiring on twists and snot from electrical tape with capacitors and other burnt crap. The set of words is the same, only the name and the number of generations of his relatives are changed. You open the VCL ... eprst ... in short, as long as you guys are there, I won’t be left without a job, and I’m not afraid of a crisis.
There is no time to engage in polemics with you, there is a lot of work ... so no offense, facts are a stubborn thing, I do not pretend to be the ultimate truth, but I believe my eyes more than your word is nonsense.
I respect your opinion, I just don't agree with it, so call me if I went too far...Click to reveal...
You don’t have to consider everyone fools with collective farm hands, this is disrespectful, I didn’t write that I’ll put wires from welding and capacitors from army trucks on the magician, the capacitor has the voltage that it was charged with (my car has a voltage of 12 volts) so that grabbing it is not a little more dangerous than grabbing a steering wheel ...
I don’t work on a collective farm, everything is installed beautifully and competently, I don’t see anything wrong with an additional power source.
Many resigned themselves to the fact that the music “fades out” at the start of the engine, but I didn’t like it (and I think the radio tape recorder too)
I found a good place for an additional battery, I got up like a native, you can connect an alarm to it, and this is an extra barrier to hijackers ... the price of the issue is 500r, but there are a lot of benefits, I don’t even understand what it’s about.
And yet, here many are looking for options for replacing the standard head (radio), and I was looking, now everything is mounted (the head, the power adapter of the standard tuner amplifier, the amp. Everything fell into 18t.r.) and works fine. And all this without replacing the regular subwoofer and speakers.
Ride and bastard, who are interested, I can post pics
Motorists could repeatedly notice that in the process of starting the engine, or rather turning on the starter, the car radio turns off. The device goes silent for just a few seconds, and then turns on. Most often, this situation can be observed with non-standard devices. Let's find out what to do when the radio turns off when starting the engine.
The principle of operation of the radio
Car radios have long been an integral part of any car. Even options such as UAZ "Patriot", VAZ 2110-2114 are no exception. The principle of operation of any car radio is almost the same and does not depend on the model. When the driver gets into his car and turns on the ignition, all systems automatically start, including multimedia. Next, the starter is activated to start the engine. At the same time, the instrument lighting dims, and the radio turns off when the engine is started. When the engine starts, the multimedia system starts working normally again.
It is believed that one of the reasons for this behavior of the radio is that the engine is still cold after starting. As soon as the engine warms up, when restarting, the radio will not turn off. The starter is involved in the process of starting the car. It is a consumer of a large amount of electrical energy - at the time of starting a cold engine, the voltage drops sharply in the car's on-board network and the radio tape recorder is simply not enough.
Radio protection system
For the driver, the main goal is to start the engines. Support for any other devices is relegated to the background. All the energy available in the battery is used to operate the starter. The radio does not have enough power, and it turns off. Many motorists are very nervous about this, but this is not a minus, but a plus. If the radio turns off when the engine is started, then the voltage is low, and the device on it, especially of Chinese "origin", may not work correctly. In order to prevent serious failures in circuitry or software, the system automatically turns off - this is how protective mechanisms work.
When the car has already driven a certain distance and the engine has been turned off, when you try to restart the radio, the radio will not turn off. The amount of energy increased by recharging the battery with a generator.
Manufacturers have taken these points into account: most radio tape recorders have a so-called threshold for the operation of protective functions. Consider the condition of the battery.
Radio connection
One of the reasons why the radio turns off when the engine is started may be the connection, or rather the diagram of how to do it correctly.
If you connect a multimedia device in series according to the scheme proposed by the manufacturer, then when the engine is started, when the key is turned from On to Start, a power interruption occurs at the ignition switch.
You can solve this problem if you power the multimedia device directly from the battery. However, there are disadvantages in such a connection: the radio tape recorder will drain the battery. On a cold winter night, the radio may be enough to completely drain the battery.
Current leakage in the on-board network
If the radio turns off when starting the car, then the problems may lie in the so-called current leaks. That is, when the ignition is off, there are consumers that discharge the battery. During the night, due to these leaks, the battery can “sit down” completely. In order to solve the problem, you need to find the leak and find its culprit. It can also be a radio, alarm, central locking and other systems.
wires
This is another reason if the radio turns off when the engine is started. The whole thing could be in the wires. Often, radios are connected with thin low-quality wires. They do not have sufficient characteristics and multimedia is unstable.
The solution to the problem may be to replace the power wires of the radio with copper analogues with a cross section of 2.5 mm. This allows you to forget about reboots and turning off the radio at all. Also, the music does not turn off when the volume is increased. This method can be used so that the radio does not turn off at startup, but it will only work normally with a relatively new battery.
Starter
Sometimes the battery may not have anything to do with it, and the problem can hide in the starter. During the operation of the latter, its parts are subject to wear. If the starter bushings are worn out, then the shaft can jam in them and more energy must be expended to crank. Hence the shutdown of most electrical consumers.
To correct this malfunction, a starter revision is necessary. It is necessary to check the brushes, the collector, replace worn bushings, lubricate the mechanisms. After such a revision, the starter will work like new, which means that it will need less voltage.
Finalization of the radio
Motorists are finalizing their radio tape recorders themselves, if they did not take into account the moment. To solve the problem, you will need 2 elements - this is a 22,000 uF capacitor with a voltage of 25 V, as well as a 10 A diode (the diode must be selected based on the fuse ratings in the radio). In this circuit, the diode will serve as a valve - it will not allow the capacitor to feed the on-board system of the car, but will only feed the radio.
The scheme is simple. A capacitor is soldered between the power wires of the radio. A diode is soldered to the positive wire with the positive contact to the “+” of the capacitor.
How it works?
So. When the driver starts the car, the starter takes on most of the voltage, so the radio turns off when the engine starts. To prevent the multimedia system from turning off, a diode and a capacitor are used.
The main supply voltage of the radio goes through the diode and charges the capacitor. When the ignition is turned on, the voltage will go through the diode and charge the additional capacitor. When the starter is running, the voltage in the on-board network sags. Diodes do not allow the voltage in the capacitor to go into the network - the entire charge will go to the radio so that the radio does not turn off when the engine starts. For the latter to work for 5 seconds, a capacitor with a capacity of 470 uf is enough.
Other solutions to the problem
Experienced motorists recommend other options. You can purchase a high-capacity battery, and then you can forget about this malfunction forever. You can also purchase cheaper multimedia systems - they are less demanding on quality and voltage stability. If the radio with a rectifier turns off after starting the engine, then it may be worth checking the wiring for possible errors.
Conclusion
With the help of these tips, many motorists have overcome this problem. A capacitor and a diode help a lot. If the capacitor with the diode did not help, then you need to check the wiring, the starter, the operation of the generator and change the battery.
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Sometimes the radio turns off when the engine is started. There are several ways to deal with this problem and make listening to music in the car more stable.
Why is it turning off
When the voltage in the on-board network drops below the set limit when starting the engine, the car radio turns off.
During the engine start, the front panel of the receiver goes out for a while, and after the starter is turned off and the engine starts, it lights up again, and the operation of the device resumes. There are several reasons for the car radio to turn off when starting the engine.
Radio protective function
This mechanism is built into some car players. Protection is applied to prevent violation of device functionality. The fact is that strong power surges when working at high volume can lead to a failure of the settings or the failure of the radio due to burnout of the microcircuits. Thanks to the protection, the head unit does not turn off during the start of the engine, but only reboots. All settings set by the user remain the same.
The car radio protection function will work if the battery voltage drops when the engine is started due to insufficient charge or negative temperature.
Insufficient battery capacity, which does not correspond to the parameters of the vehicle, also leads to the radio turning off.
The permanent shutdown of the head unit occurs due to malfunctions in the ignition switch, if the power is connected through it. This phenomenon is caused by the occurrence of a strong voltage drop on worn or contaminated contacts.
Problem in the generator
Another reason why the radio turns off when the engine is started is a malfunction of the generator. There may be problems with the voltage regulator, capacitor, and rectifier bridge. Due to these malfunctions, the charge from the generator, received when the engine is started, may be absent or insufficient to maintain the voltage necessary for the operation of the radio.
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Also, the source of the problem may be a breakdown of the diode bridge or stator.
Because of this, a faulty alternator will put a lot of stress on the battery.
Malfunctions will be indicated by the absence of the low battery indicator in the instrument panel when the ignition key is turned on, or by the same warning lamp coming on while the engine is running.
Starter problem
Another typical reason due to which the car radio and other lighting devices go out while the engine is starting is a starter malfunction. It is the most powerful consumer of energy in the car.
If a malfunction occurs in it, then a permanent shutdown of the car radio will be observed. The device may also be reset if the voltage drop is excessive due to problems with the starter.
Leak problem
Current leakage can occur in different parts of the wiring due to insulation damage or contamination of the battery case.
From this, the voltage in the on-board network, when the engine starts, drops more than during operation, which also leads to the car radio turning off when you start the car.
How to make the radio not turn off
The alternator and starter need to be checked. A short circuit in the windings is determined by their darkening or heating of faulty parts and assemblies. A battery case leak can be detected with a tester. To do this, touch one of the probes of the device with one of the battery terminals, and touch different points of the case with the other. Deviation of the pointer will indicate the presence of a leak. To eliminate it, wipe the car battery case. Also, the tester will help to more accurately check the starter, alternator and wiring for short circuits or leaks. Faulty parts and assemblies must be replaced.
Why does the radio turn off when starting the engine? This question worries many drivers. This problem causes inconvenience during the operation of the car radio. As a rule, it occurs with non-standard devices. And this is not surprising. After all, the head unit in the car is different manufacturer.
Turning off the radio when starting the engine of the car is not a malfunction of the equipment. This problem can be fixed quickly and easily, both independently and by specialists. The problem is accompanied by the fact that the dashboard light loses its brightness, becomes dim. Having determined the causes of the failure, it is possible to restore the high-quality operation of the equipment.
The principle of operation of the device
The radio has long been an integral part of any car. The UAZ Patriot, VAZ 2110, VAZ 2107, VAZ 2114 models were no exception. The principle of its operation for them is almost the same. As soon as the driver got into the car, he turns on the instruments and the multimedia system. Then he inserts the key into the ignition and turns it. This leads to the fact that the starter provokes the operation of the engine and the following picture occurs: the backlight of the instruments becomes dim for a few seconds, and the head unit stops functioning. This phenomenon stops as soon as the internal combustion engine starts to work.
Car radio The reason for this work is that the engine has not yet warmed up. Once it is fixed, restarting will not cause these problems. If the engine is preheated, the radio will not turn off. Since this process involves a starter, which is shown in the photo below. It consumes a large amount of energy, which leads to a sharp decrease in voltage in the on-board system of the vehicle UAZ Patriot, VAZ 2110, VAZ 2107, VAZ 2114.
The protective function of the radio is the main cause of the problem
Starting the engine is the main goal of the driver. Therefore, support for other elements fades into the background. As a result, all the energy is directed to provoke the functioning of the starter. The radio has no choice but to automatically turn off. This ability can be attributed to its pluses. Since at low voltage the device will begin to function incorrectly. To prevent this, the system switches itself off. Her defense mechanism kicks in.
As soon as the car UAZ Patriot, VAZ 2110, VAZ 2107, VAZ 2114 drove several kilometers, and it was necessary to start it again, the radio tape recorder does not turn off. Since the device receives the required amount of voltage. The manufacturer of radio tape recorders took this moment into account and set a threshold, which is decisive for the operation of the protective function. It is also worth considering the condition of the battery and the charge level of the battery. This is especially important in the winter season.
Other causes of the problem
If the radio turns off when the VAZ 2110 engine is started, then do not be upset. This situation is not a sign of a malfunction of the equipment. She is completely understandable and normal. Knowledge of the principles of operation of the car radio and communication with its vehicle will help to verify this. Therefore, do not rush and send the equipment to the trash can or try to fix it.
First you need to determine the condition of the battery. Its energy should be enough to perform various tasks in a short period of time for the operation of the internal combustion engine. Otherwise, you will need to sort out the problems with the battery. The following happens:
- energy leakage;
- does not charge well from the generator;
- no charge builds up.
Problem in the generator
Each of these reasons has its own logical explanation. If we talk about the fact that the battery is not charging well from the generator, then the relay-regulator is to blame. It does not work correctly, it is quite logical that the device will not receive enough energy. As a result, there is a voltage drop when starting the engine.
In this case, do not forget that the generator itself can lead to such troubles. This happens mainly when some of its elements fail. This situation is typical for new batteries. At first, the problem is less pronounced, but over time it becomes more pronounced.
Starter problem
If the radio turns off when the VAZ 2110, VAZ 2107, VAZ 2114 engine is started, then the reason may be in the starter. Over time, this part may fail. It starts to wedge, during operation it makes knocks, clicks and other unpleasant sounds. These are signs that the part is not working properly. It is hard for her to spin and turn the motor.
This will all lead to the fact that the starter needs more energy to work, which it takes from the battery. Thus, voltage drop occurs regularly. As soon as an attempt is made to start the power unit, the radio automatically restarts. To fix the problem, you need to check the starter for serviceability. If problems are found, fix them.
Leak problem
If the generator and starter are checked for serviceability, but the problem remains, then the cause is a leak. The radio turns off when the VAZ 2110, VAZ 2107, VAZ 2114 engine is started, since another device leads to a battery discharge. To find out the exact cause of such a problem, you need the help of a specialist. He is quick to get the job done.
The likelihood that the radio is not connected correctly is small, but it exists. Therefore, it should not be written off. It needs to be checked at the moment. It is also necessary to make sure that the radio tape recorder is operational. Since it can be the main cause of the problem. It is important to note that this rarely happens.
If turning off the radio when starting the engine for a cold start is rare, then you should not worry. This is quite normal. But the constant shutdown requires the attention of the driver. Since this is a clear sign of the failure of some mechanisms or parts in the vehicle.
