Refinement of the radio
Car enthusiasts modify their radios themselves if they did not take this moment into account. To solve the problem, you will need 2 elements - a 22,000 microfarad 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 power the on-board system of the car, but will only power the radio.
The scheme is simple. A capacitor is soldered between the power wires of the radio. A diode is soldered onto the positive wire with the positive contact to the “+” of the capacitor.
Car radio overheating
Some car owners may experience overheating of the car radio. Usually this breakdown is detected in the summer. In this case, it is worth checking the cooling elements (radiators) on the back of the radio (where the wires are located). If they don’t work, and the entire back panel is hot, then you should look for the problem in the radiators.
Car radio
Most of the problems that cause the radio to turn on and off on its own are also related to other car systems, so you shouldn’t be indifferent to this problem, but fix it in a timely manner.
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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 to the radio goes through the diode and charges the capacitor. When the ignition is turned on, voltage will flow through the diode and charge an additional capacitor. When the starter is operating, the voltage in the on-board network sags. The diodes do not allow the voltage in the capacitor to go into the network - all the charge will go to the radio, so that the radio does not turn off when the engine starts. To operate the latter for 5 seconds, a capacitor with a capacity of 470 uf is sufficient.
Source
How to prevent the radio from turning off
The generator and starter need to be checked. A short circuit in the windings is determined by their darkening or heating of faulty parts and components. Leaks in the battery case can be detected using a tester. To do this, touch one of the battery terminals with one probe of the device, and touch different points of the case with the other. A deviation of the arrow will indicate the presence of a leak. To eliminate it, you should wipe the car battery case. The tester will also help you more accurately check the starter, generator and wiring for short circuits or leaks. Faulty parts and assemblies must be replaced.
You can prevent the radio from turning off when you start the engine by replacing a worn or weak battery with a more powerful one if its capacity does not match the engine parameters. As a result, the voltage in the vehicle’s on-board network will drop less when the engine starts. It is necessary to check the car wiring for damage.
If the radio was connected through the ignition switch, then it is recommended to connect it directly to the battery. This helps relieve the load on the ignition switch and will protect the receiver from turning off when starting the car engine. If the radio continues to turn off, it should be turned off manually before starting the engine, and then turned on again.
What to do if the TV turns on and off spontaneously
In addition to small unpleasant situations, more complex malfunctions also arise.
When shutting down the radio, problems may arise such as a complete spontaneous reset of settings and restoration of factory settings. This situation is often very annoying, as it becomes necessary to set everything up again. Therefore, most car enthusiasts, when this malfunction occurs, rush to get rid of such a breakdown as quickly as possible.
Let's figure out why the radio can turn on and off by itself.
A defective radio or a malfunction acquired during use.
Car radio
Defective speaker systems are a fairly common problem; during their production, breakage or defective microcircuits inside the radio may occur. Often, it is because of this that the radio can turn on and off whenever it pleases. To identify and eliminate the malfunction, you need to take it to a service center to diagnose the repair.
Problems connecting speakers to the radio
Incorrect connection of wires can cause the device to turn off and on randomly. At the moment of a short-term increase in productivity (starting the car). There is a short circuit in the wires with a loose connection, the radio may turn itself off.
You can fix this problem yourself.
If this does not help, then you need to check the wires for their integrity.
To do this you need:
Car radio repair
If the car radio did not turn off when the volume was increased, then we can assume that the problem is in the wires connecting the radio to the speaker. In this situation, replacing the damaged wire can help you out. If this does not help, it is better to contact the service.
The radio turns off in the pits
31.03.2015 12:35 #1
The radio on my truck turns off when shaken and turns on immediately. The head is pioneer deh-1320mp, in theory there should be anti-shock. When listening to the radio, it does not turn off. I don’t know how it’s connected yet, but obviously not directly to the battery. Yes, I once opened a window (with a power window), with the car turned off and the radio turned off. I think it's a wiring issue, but why doesn't the radio turn off when listening to the radio? Useful topics:
31.03.2015 12:35 # 0+
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Best wishes, Administration of the Car Audio Forum Radio
31.03.2015 12:47 #2
1st: Secure the GU itself properly so that it doesn’t dangle, etc. 2nd: Connect the GU directly, through a fuse, to the battery with a wire with a cross-section of 2.5 square meters. mm. 3rd: Check the standard wiring of the car, start with the ground from the battery to the body and engine, measure the voltage with the car running and switched off.
31.03.2015 13:08 #3
It can fool your head, especially if it’s glass and not English.
31.03.2015 13:09 #4
We need to work thoroughly on the third point, one day I honked the horn, but the car stalled and the radio did not work. A fuse for the engine control system and another fuse under the steering wheel blew out (I don’t even know whose it is, whether it was from the alarm system (and it was removed), or from the radio).
31.03.2015 13:21 #5
Posted by alexxey68
We need to work thoroughly on the third point, one day I honked the horn, but the car stalled and the radio did not work. A fuse for the engine control system and another fuse under the steering wheel blew out (I don’t even know whose it is, whether it was from the alarm system (and it was removed), or from the radio).
Here I recommend not to put off solving this problem; faulty wiring can easily burn the car.
31.03.2015 13:27 #6
I agree, the fire extinguisher is always under the seat
31.03.2015 14:42 #7
Posted by alexxey68
I agree, the fire extinguisher is always under the seat
It won’t help the brain and proper connection - let’s approach this issue wisely from the beginning, and rule out fires in the solution. Recommendations have already been given, all that remains is to use them.,
20.05.2015 13:12 #8
I had some free time and studied the problem. The problem is in the radio, I corrected the wiring. The problem has not gone away. It was powered by power windows; at the moment the windows were raised/lowered, the voltage dropped to 9 V, which is why it turned off. Has anyone experienced the radio turning off in pits while playing a CD? Is it difficult to troubleshoot or is it easier to buy a new radio?
Surge protection installed
Sometimes manufacturers, in order to ensure long life of the device, install a voltage limiter. This reason is very common. That is why many car enthusiasts turn to auto centers with the same question, “Why does the radio turn on and then turn off immediately?”
Car salon
And if you have tried all the options for troubleshooting the radio, then this case also applies to you. When the volume is increased, the amount of energy consumption increases; when the maximum energy level is reached, the radio turns off. Unfortunately, the service will refuse to fix this problem for you, because if you remove the protection, the device may burn out.
If you really need to remove the protection, you can try the following methods:
Surge protection in the radio itself
This is the most common reason why the radio turns off when the volume is turned up. Many drivers, when contacting a car service center, hear from specialists that the radio is equipped with overvoltage protection, which is triggered when the power increases. Adding sound to the radio leads to an increase in power consumption from the battery, which can lead to automatic muting. It is impossible to bypass this protection, because... otherwise, the radio may burn out completely. To solve the problem of surge protection, experts recommend installing an amplifier between the radio and speakers (see video on how to do this here).
Another way to solve the problem of the radio automatically turning off when the volume increases is to check the wires leading from the radio to the speakers, which may have a short circuit. Check all the wires leading to the speakers one by one - if there are any that are pinched or twisted, then by changing their position to the correct one, the problem with the operation of the radio may disappear. If the wires are severely damaged, it would be advisable to replace them with new ones.
Car radio overheating
Some car owners may experience overheating of the car radio. Usually this breakdown is detected in the summer. In this case, it is worth checking the cooling elements (radiators) on the back of the radio (where the wires are located). If they don’t work, and the entire back panel is hot, then you should look for the problem in the radiators.
Car radio
Most of the problems that cause the radio to turn on and off on its own are also related to other car systems, so you shouldn’t be indifferent to this problem, but fix it in a timely manner.
There is not one correct version, I connect the radio through a laboratory power supply, without speakers, after 4 seconds it turns off.
Car owners often notice that the radio turns off when the volume is increased. If the problem occurs regularly, you need to test the main parts of the system. The repair procedure depends on the brand of audio device or car. Simple faults can be fixed with your own hands. If more significant damage occurs, contact a specialist.
The radio turns on and off immediately
The radio turns on and off immediately
Post by s0me0ne » 05 Sep 2012, 17:41
I don’t understand what the problem could be. Some time ago the radio simply stopped turning on.
I disassembled the dashboard, took out the radio and sent it for repair. The repair shop checked it and said that the radio was working - everything was fine with it.
connected it again to the sonata - it turns on and turns off immediately.
two din radio tape recorder PHANTOM DVM-130G HDi
The radio was originally installed in the auto world.
When starting the engine, the radio turns off: why does this happen?
Let's start with the fact that during operation of many cars, drivers notice when starting the engine that the radio tape recorder fails, the head unit turns off for a few seconds, then turns on automatically, etc. Note that this often happens with non-standard car radios, that is, when the head unit in a car is from a third-party manufacturer.
In this case, this situation in the vast majority of cases is not a malfunction, but the possibility of malfunctions should not be completely excluded. In this article we will talk about why, when starting the engine, the radio turns off and the dashboard lights dim.
When you start the engine, the radio turns off: reasons
So, the owner gets into the car, turns on the instrument lights and radio, and then turns the key in the ignition. The starter begins to turn the engine, while the instrument lighting dims to a greater or lesser extent, and the power unit turns off and restarts until the engine itself starts operating.
As a rule, this happens if the engine is not yet warmed up. If you repeat launches in the future, but this time “hot” or after a slight preliminary warm-up of the engine, the radio will no longer turn off.
It is important to understand that when the power unit starts, the starter is engaged. This device is actually an electric motor that takes energy from the battery to rotate the engine crankshaft. At the same time, the starter is a powerful energy consumer. To put it simply, during operation of the starter, there is a sharp and quite strong decrease in voltage in the vehicle’s on-board network.
This voltage drop during startup is predictable. In this case, the main task remains to start the engine, and not to maintain the operation of other devices (heated mirrors and windows, headlights, radio, etc.). In other words, after turning the ignition key, all energy is sent to the starter.
If we talk about the radio, when the voltage in the on-board network drops, the power supply automatically turns off. This function is protective. The head unit itself contains a special program that restarts the car radio to protect it from freezing when the voltage drops.
However, it can be noted that this does not happen in all cases. For example, after the engine has been warmed up or the car has driven several kilometers after being idle, the radio does not restart when trying to restart the engine. Also, some power plants never turn off when starting the internal combustion engine, even if such a start is very difficult (the starter turns slowly, the dashboard dims, the headlights go out, but the music plays). Let's figure it out.
As already mentioned, the protective function of turning off the power supply at low voltage is programmed by the radio manufacturers themselves. In this case, a minimum “threshold” is established when the protection will work. This means that if the voltage does not drop below any value set by the device manufacturer, the head unit will not restart either.
In practice, everything will depend on the battery charge level and the condition of the battery. For example, the battery is slightly discharged, and the car starts in the winter after being parked overnight. Under such conditions, the starter will naturally need to turn the engine longer, since the engine oil thickens in the engine under the influence of negative temperatures, the fuel pumps and evaporates less well, etc.
The battery itself is also cold and consumes the remaining charge faster, that is, after a second or two the starter will turn more slowly, etc. It is quite obvious that all the “forces” will be devoted to starting the power unit, and a voltage drop in the on-board network will naturally occur.
When you start the engine, the radio turns off: reasons
So, the owner gets into the car, turns on the instrument lights and radio, and then turns the key in the ignition.
The starter begins to turn the engine, while the instrument lighting dims to a greater or lesser extent, and the power unit turns off and restarts until the engine itself starts operating. As a rule, this happens if the engine is not yet warmed up. If you repeat launches in the future, but this time “hot” or after a slight preliminary warm-up of the engine, the radio will no longer turn off.
It is important to understand that when the power unit starts, the starter is engaged. This device is actually an electric motor that takes energy from the battery to rotate the engine crankshaft. At the same time, the starter is a powerful energy consumer. To put it simply, during operation of the starter, there is a sharp and quite strong decrease in voltage in the vehicle’s on-board network.
This voltage drop during startup is predictable. In this case, the main task remains to start the engine, and not to maintain the operation of other devices (heated mirrors and windows, headlights, radio, etc.). In other words, after turning the ignition key, all energy is sent to the starter.
If we talk about the radio, when the voltage in the on-board network drops, the power supply automatically turns off. This function is protective. The head unit itself contains a special program that restarts the car radio to protect it from freezing when the voltage drops.
However, it can be noted that this does not happen in all cases. For example, after the engine has been warmed up or the car has driven several kilometers after being idle, the radio does not restart when trying to restart the engine. Also, some power plants never turn off when starting the internal combustion engine, even if such a start is very difficult (the starter turns slowly, the dashboard dims, the headlights go out, but the music plays). Let's figure it out.
As already mentioned, the protective function of turning off the power supply at low voltage is programmed by the radio manufacturers themselves. In this case, a minimum “threshold” is established when the protection will work. This means that if the voltage does not drop below any value set by the device manufacturer, the head unit will not restart either.
In practice, everything will depend on the battery charge level and the condition of the battery. For example, the battery is slightly discharged, and the car starts in the winter after being parked overnight. Under such conditions, the starter will naturally need to turn the engine longer, since the engine oil thickens in the engine under the influence of negative temperatures, the fuel pumps and evaporates less well, etc.
The battery itself is also cold and consumes the remaining charge faster, that is, after a second or two the starter will turn more slowly, etc. It is quite obvious that all the “forces” will be devoted to starting the power unit, and a voltage drop in the on-board network will naturally occur.
However, after the engine starts and runs for some time, the battery replenishes the lost charge thanks to the operation of the car generator. The oil in the engine also thins out, etc. This means that when restarted, it will be much easier for the starter to start the internal combustion engine, that is, there will no longer be a significant voltage drop. In this case, the protection of the car radio will no longer work, since the voltage simply will not drop to the minimum required by the manufacturer of the head unit.
Incorrect speaker connections
Incorrect connection of wires contributes to spontaneous turning off and turning on of the radio. At the moment of a sharp increase in performance (engine starting), the connections are closed. To fix the problem, you need to do the following:
If the device still turns off after repair, you should inspect the cables for damage. Diagnostics and troubleshooting are carried out as follows:
If the device does not turn off when adjusting the sound, the problem should be looked for in the wires leading to the speakers. The damaged element should be completely replaced. If the problem cannot be fixed, it is recommended to contact a specialist.
Surge protection
Manufacturers of car radios, in an effort to extend the life of their devices, install voltage limiters. The overload protection system often causes the tape recorder to turn off when you turn up the volume. If the search for other faults does not produce results, the reason should be sought in the presence of a limiter. As volume increases, power consumption increases. When the maximum voltage is reached, the radio will turn off.
The specialists refuse to fix the problem. If you remove the protection, the device may break. If the owner still decides to get rid of the limiter, he will have to carry out the repairs himself. The work order includes the following steps:
Lack of power supply
If the car radio turns on and immediately turns off by itself, the cause should be sought in the following faults:
Reconnecting the device to the on-board network helps to cope with the problem. When performing work, cables with a thickness of at least 0.75 mm are used. To connect powerful car radios, use wires with a cross-section of 1 mm or more. The negative wire is connected as follows:
A connection made using this method is well suited for connecting powerful car radios and amplifiers.
Lack of car radio power supply
When you turn up the volume on the speakers, the radio may also turn off because the cross-section of the wires cannot withstand the load, causing the fuse to trip. To solve this problem, you need to change the wires to thicker ones, and also power the radio directly from the battery. In 90% of cases, this helps to get rid of problems in the operation of the radio, as well as improve its performance: the device will work even when the engine is started, with the cigarette lighter working and the phone being charged.
Insufficient battery power
If there is a malfunction of the battery, or if the battery power is insufficient, a drawdown occurs when the engine is started, which is why the available voltage is not enough to operate the car radio. In this situation, installing a capacitor on the radio, as well as troubleshooting the battery itself, can help. Old car batteries can also cause a similar problem with the audio system. The battery may need to be rewired or fully charged.
Solutions and tips
To determine whether a car radio is defective, you should remove it from the car and take it to a service center that repairs audio equipment. If a fault is discovered that cannot be repaired, you will have to buy a new device. Speakers with a voice coil impedance of less than 4 ohms should not be used. This will sooner or later lead to failure of the audio system due to overheating and burnout of the power amplifier chip.
To identify and fix speaker problems, you should check your speaker cables for twisted, frayed, or damaged wires. If extensive defects are found, the entire wiring should be changed. You can do this yourself or at a car service that specializes in car audio.
When connecting connectors, you must ensure that the leads do not come into contact with the speaker housings to prevent a short circuit.
To solve problems with overvoltage protection, you can install an additional amplifier or replace the audio device with a more powerful one.
To eliminate the power shortage, you should reconnect the car radio to the on-board network. Wires with a thickness of at least 0.75 mm should be used. The more powerful the device, the thicker the wire. The most reliable connection of the negative pole is carried out as follows.
A stud is found under the instrument panel, which is cleaned of paint, dust, dirt and oil. Then take a piece of wire with a “chip” that has a hole of a suitable diameter. One end is connected to the radio, the chip is put on a pin and screwed tightly with a nut and a spring washer. The positive wire connects directly to the car battery. The connection made in this way will be the most reliable. This especially applies to powerful radios, as well as active subwoofers (with an amplifier).
Hello! The Pioneer touch radio (I don’t know the model) turns on and turns off immediately. It could be a fuse or wiring. Plus, you need to adapt the standard rear camera from Outlander to this radio. The connector does not fit. Who will take it and how much will it cost approximately?
Adding a solution
It is forbidden to write answers that do not bring any benefit to the questioner from the series: “take it to the service center”, “contact the ASC”, “unprofitable”, etc. Such answers will be considered a rating increase, the answers will be deleted, and the account will be blocked.
Insufficient battery power
If the radio constantly turns off when the volume increases, the reason should be sought in the low power of the battery. When the engine is running, the battery power drops sharply, which is why there is not enough voltage to operate additional devices. Installing capacitors on radios helps solve this problem.
You should look for problems in the battery itself. Malfunctions in the operation of audio devices occur when using an old-style battery. The battery may need to be fully charged. It is also recommended to check the wiring connecting the battery to the on-board network.
The radio in a car is one of the most powerful consumers of energy. It happens that the radio turns off when the volume is increased, and after turning it on again it continues to work normally, but at a lower sound level. This is especially true for powerful devices equipped with subwoofers.
Why does the radio turn off when I turn up the volume?
But turning off the radio when the volume is increased means that the radio is not powered properly! That is, the radio circuit is not supplied with the required voltage of 12V, but a little less; due to these losses, it cannot take as much current as it needs under a certain load.
You can do a simple experiment. We check the voltage on the battery with a voltmeter; it should be approximately 12.5V. We turn up the volume on the radio and the voltage remains virtually unchanged. Now we connect the voltmeter directly near the radio to the power wire. At low volume, the voltage will correspond to the battery voltage, that is, approximately 12.5V. But when you add volume, the voltage will decrease and can be 10V or less. There have been cases, especially on older machines, that the voltage dropped to 8V!
This means that there are huge losses in the wire that powers the radio. Therefore, the radio must always be connected directly to the battery and with a large cross-section wire!
Note: if, when you turn up the volume, the voltage on the battery also drops, then it most likely asks for disposal.
If the power cable is routed from a battery and has a large cross-section, and the problems persist (this happens very rarely), then you need to check the capacitors in the radio itself.
As can be seen in the photo, the capacitors have swollen and become unsuitable for performing their function.
Faulty capacitors on the board
They need to be replaced and the power supply to the radio elements will return to normal.
I would also like to write about capacitors.
Capacitor
A capacitor is like a miniature battery that charges and discharges. Therefore, some people place them in parallel in the power supply circuit of the radio. Of course, there is a rational grain in this. The bottom line is that when the radio tape recorder consumes little energy, the capacitor is charged, and when the radio tape recorder has a peak energy consumption, the capacitor is discharged, and, as it were, helps restore the voltage drop with its charge.
But it is worth noting that if the power is supplied directly from the battery and a good wire, then the capacitor is absolutely not needed, since the power of the battery and capacitor are not comparable and the capacitor will not bring any benefit.
But if it is not possible to provide normal power supply, then a large capacitor placed directly in front of the radio in parallel with the power supply will have a positive effect. The main thing is not to confuse the polarity!
Other problems
Problems with reading storage media arise no less often than difficulties with turning on. You can eliminate them yourself.
No sound or noise
This problem can be caused by several reasons, the most common of which are:
Does not read the disk, flash drive or the disk is stuck
When using the car radio, the following problems with reading information may occur:
The device is heating up
The radio overheats and turns off on its own if the power system is connected incorrectly. It is necessary to check the wire; it may have become loose or damaged. The cable needs to be completely replaced. The radio does not work in the car even if there is insufficient ventilation. This problem is typical for budget devices; it does not lead to significant malfunctions. If the system overheats frequently, you need to install a ventilation system.
A car radio, like any other device or mechanism in a car, can fail. As practice shows, car radio repairs are usually carried out in the event of improper operation of the device or when malfunctions occur that are not related to use. In this article, we propose to familiarize yourself with the main causes and methods of eliminating audio system breakdowns.
such a problem. The radio in the car turns off and on by itself,
such a problem. The radio in the car turns off and on by itself,
- Leave the radio overnight in the car with the window open. It will definitely not turn off on its own anymore. Just like turning on.
- This is a radio tape recorder, I got full along the way... There was such garbage at the top five when I worked in a taxi. Or is it powered through the lock, you need to twist the constant plus with the plus on the lock together when connecting. Bypassing the castle, of course.
- Andryukha, I have the same problem now. The radio is connected to the cigarette lighter and sometimes turns off on its own. Tell me, did you solve the problem? And how? My mail
- the panel is coming off or the connector is on the back, or the wires are half-broken somewhere, or maybe it’s just glitchy.
- Mine is having the same problem now. But only when the car is running. It works fine when the engine is turned off. + connected directly from acoma. I don't know what to do.
- If the panel is folding, then it’s better to buy a new, I mean, radio!
- yes the relay or contact is loose
- Either the contacts on the back are loose or there is a glitch in the radio itself.
- This panel does not fit tightly. I have the same
- The magnet is stuck, I need to sprinkle it with some water.
- Magnitollo lives his life untouched, and you don’t.
- But I haven’t tried to watch a lot. (grounding the radio). If it is poorly grounded and the ground moves away, then it will turn off from time to time, and also after the radio does not turn off, something else may be the fuse is weakened. The Lada is one of the weak points. In general, look at how it is connected, if it is embedded in a common circuit, then this is not good. It is better to connect the tape recorder and other equipment with separate wires from the battery and put a fuse on the positive one. The wire has a cross-section of at least 4-6, and if the sub and amplifier are all 8. There are special silicone wires with minimal loss of conductive current (they do not freeze in winter). PC: Never connect the tape recorder from the cigarette lighter or any other source of the system. Wiring is rated for specific amps. Their excess leads to melting of fuses and, as a result, to fire.
- drummer, definitely.
- look at the fuses
- The radio tape recorder goes into another world. Mine has already left this world. I bought another one. Everything is fine.
- There are modern powerful radios (alpine, pioneer) for which 12 volts is not enough, and in addition to this, many additional devices are required. Many people connect their radios incorrectly, and in such a way that even when turning on the turn signals or headlights, they will turn off. The search engines are full of this information!! Read and learn modern auto electrics! But the best option is to entrust this matter to a normal auto electrician.
Possible reasons
If there is an internal breakdown of the device, the car radio turns off when the volume increases while driving quickly over bumps. If the vehicle's battery is discharged, the radio, when operating at high volume, turns off when the high beams are turned on or the car engine is started.
If the power supply circuits are not connected reliably, a lack of power appears. Because of this, the device constantly turns off. If there is damage or leakage in the speaker wiring, the radio will turn off by itself. If the overvoltage protection is triggered, the operation of the audio device will also be interrupted when the volume increases.
Defect or breakdown
During production, shortcomings are often made that lead to defects, for example, a short circuit between the terminals of microcircuits. Also, turning off the device often occurs due to a breakdown of the car radio.
Problems connecting speakers
Incorrect connection of the speakers or signal leakage to the car body is another reason for the radio to suddenly turn off. Also, spontaneous shutdown of the radio is provoked by problems in the speakers - breakdown, short circuit in the coil, too low resistance or bridging of the connectors to the speaker body. Speaker problems can be easily identified using a digital multimeter. On the displays of some radios, a message appears indicating that the protection has been activated.
Why does it turn off?
When the voltage in the on-board network when starting the engine drops below the set limit, the car radio turns off.
When starting the engine, the front panel of the receiver goes out for a while, and after turning off the starter and starting the engine, it lights up again and the operation of the device resumes. There are several reasons why the car radio turns off when you start the engine.
Protective function of the radio
This mechanism is built into some car players. Protection is applied to prevent disruption of the functionality of the device. The fact is that strong voltage surges when operating at high volumes can lead to settings failure or failure of the radio due to burnout of microcircuits. Thanks to the protection, the head unit does not turn off when the engine is started, but only reboots. All settings set by the user remain the same.
The car radio's protection function will work if the battery voltage drops when starting the engine due to insufficient charge or freezing temperature.
Insufficient battery capacity that does not correspond to the parameters of the vehicle also leads to the radio turning off.
Constant shutdown of the head unit occurs due to problems in the ignition switch if the power connection is made through it. This phenomenon is caused by the occurrence of a strong voltage drop across worn or dirty contacts.
Reasons why the car radio turns on and turns off immediately
1. Incorrect connection of speakers to the radio may result in it turning off. If the wires are poorly connected to the radio, a short circuit may occur when the car is started.
2. The presence of overvoltage protection can also lead to the exclusion of the car radio. Most manufacturers install special surge protection to extend the service life of the equipment. Therefore, when the volume is increased or the radio is used for a long time, it may turn off on its own.
3. Overheating of the car radio is another reason for its unauthorized shutdown. This mostly happens in the summer heat.
Protective function of the radio
This mechanism is built into some car players. Protection is applied to prevent disruption of the functionality of the device. The fact is that strong voltage surges when operating at high volumes can lead to settings failure or failure of the radio due to burnout of microcircuits. Thanks to the protection, the head unit does not turn off when the engine is started, but only reboots. All settings set by the user remain the same.
The car radio's protection function will work if the battery voltage drops when starting the engine due to insufficient charge or freezing temperature.
Insufficient battery capacity that does not correspond to the parameters of the vehicle also leads to the radio turning off.
Constant shutdown of the head unit occurs due to problems in the ignition switch if the power connection is made through it. This phenomenon is caused by the occurrence of a strong voltage drop across worn or dirty contacts.
Generator problem
Another reason why the radio turns off when you start the engine is a malfunction of the generator. Problems may occur in the voltage regulator, capacitor and rectifier bridge. Due to these malfunctions, the charge from the generator received when starting the engine may be absent or insufficient to maintain the voltage required to operate the radio.
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.
Problems will be indicated by the absence of a light on the low battery indicator in the instrument panel when you turn the ignition key, or by the same indicator lighting up while the engine is running.
The problem is in the starter
Another typical reason why the car radio and other lights go out when starting the engine is a malfunction of the starter. It is the most powerful energy consumer in the car.
If a malfunction occurs in it, the car radio will constantly turn off. The device may also reset if the voltage drop is excessive due to problems with the starter.
The problem is the leak
Current leakage can occur in different parts of the wiring due to damaged insulation or contamination of the battery case.
Because of 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.
Problems connecting speakers to the radio
Incorrect connection of wires can cause the device to turn off and on randomly. At the moment of a short-term increase in productivity (starting the car). There is a short circuit in the wires with a loose connection, the radio may turn itself off.
You can fix this problem yourself.
- Take out the radio.
- Check the tightness of the wires to the plugs.
- If you find that the connection is not tight, correct it by inserting the wires all the way.
If this does not help, then you need to check the wires for their integrity.
To do this you need:
- turn on the radio;
- set the noise level to medium;
- alternately disconnect and return the speaker plug to its place;
- turn up the sound.
If the car radio did not turn off when the volume was increased, then we can assume that the problem is in the wires connecting the radio to the speaker. In this situation, replacing the damaged wire can help you out. If this does not help, it is better to contact the service.
Surge protection installed
Sometimes manufacturers, in order to ensure long life of the device, install a voltage limiter. This reason is very common. That is why many car enthusiasts turn to auto centers with the same question, “Why does the radio turn on and then turn off immediately?”
And if you have tried all the options for troubleshooting the radio, then this case also applies to you. When the volume is increased, the amount of energy consumption increases; when the maximum energy level is reached, the radio turns off. Unfortunately, the service will refuse to fix this problem for you, because if you remove the protection, the device may burn out.
If you really need to remove the protection, you can try the following methods:
- Install amplifiers between the radio and speakers to boost power
- Check the wires leading from the radio to the speakers; if you find twisted or crushed wires, then the problem lies there. Eliminate twisted wires, or, if the condition of the wires is critical, it is better to find new ones.
Insufficient power supply to the radio.
If the battery is weak, when the engine starts, its power may not be enough to operate all the vehicle systems, for this reason it may turn off. If your battery has enough power, you need to look for problems in the operation of the battery itself.
Car radio overheating
Some car owners may experience overheating of the car radio. Usually this breakdown is detected in the summer. In this case, it is worth checking the cooling elements (radiators) on the back of the radio (where the wires are located). If they don’t work, and the entire back panel is hot, then you should look for the problem in the radiators.
Most of the problems that cause the radio to turn on and off on its own are also related to other car systems, so you shouldn’t be indifferent to this problem, but fix it in a timely manner.
A defect in the radio itself or an acquired malfunction
Factory defects in car radios are not such a rare occurrence. During the production of the radio, various defects could have occurred inside the device's microcircuits, which lead to short circuits and other operational problems. To understand why the radio turns off when you turn up the volume, you will have to remove it from the car and take it to a car service center or service center so that specialists can diagnose the audio system.
Lack of car radio power supply
When you turn up the volume on the speakers, the radio may also turn off because the cross-section of the wires cannot withstand the load, causing the fuse to trip. To solve this problem, you need to change the wires to thicker ones, and also power the radio directly from the battery. In 90% of cases, this helps to get rid of problems in the operation of the radio, as well as improve its performance: the device will work even when the engine is started, with the cigarette lighter working and the phone being charged.
