The car alarm system is a complex electronic mechanism that can sometimes malfunction. Most often, problems arise due to malfunctions of alarm key fobs. If the security system is under warranty, in the event of a malfunction, it is better to contact the service or the installer, in other cases the problem can be correctly identified and try to fix it yourself.
If there are problems with the power supply, the key fob buttons may not respond to pressing or perform independent actions, for example, opening-closing without pressing the button. As practice shows, in 90% of cases, a faulty battery is to blame. A malfunction of the latter is also indicated by a dim glow of the power LED of the key fob or a complete absence of a signal. To check, you should use a tester. At this stage, it is better to replace the battery with a new one, perhaps the problem will be solved by itself.
On some models of car alarms (StarLine, Pantera, etc.), after replacing the battery in the key fob, it is necessary to program it. As a rule, this process is described in detail in the instruction manual. Under the sound of a screaming siren, you need to find the Vallet service button. With the help of it there is an emergency shutdown of the alarm and automatic synchronization of the system with the memorization of various functions and key fobs.
On some vehicles, connecting the alarm system involves supplying a separate positive cable from the battery and output to a separate fuse for the system. Then the tester checks that the fuse is working properly. At the same time, it is recommended to check other car fuses that can affect the signal malfunction (dimensions, sound signal, etc.). In some cases, it is necessary to reboot the security system power supply, that is, remove the connector from the contact, remove the terminal from the battery, wait a few minutes and connect everything in the reverse order. After that, a sound signal will work, and the key fob can “come to life” and work normally. Otherwise, the problem lies in the microcircuit and the contacts of the key fob itself.
Let's consider the do-it-yourself repair process using the example of the popular StarLine alarm key fob. Such a keychain is a small device with a color display, which also often fails.
In order to disassemble the Starline key fob, you need to remove the battery, unscrew one screw on the left with a screwdriver, the rest of the case is held by latches. After that, we completely disassemble the keychain into its component parts. To do this, you need to disconnect the transmitter and the graphite ribbon from the main board. Next, you need a multimeter that you need to dial; a one on the screen and a sound signal on the device indicate a working electrical circuit.
Often one of the main buttons in a key fob fails, for example, an open and close button or a program button.After opening the key fob with the tester, we call all the contacts, including the contacts of the buttons, they should close together, which will indicate serviceability.
If the tester does not respond well, the buttons may stick. In this case, use a toothbrush and a solution to go over the surface of the buttons on the board, while trying not to damage the display. If the tester does not respond at all, then the button or other wire or contact is dead and must be replaced. You can buy a button in a store or find a "donor" button, for example, in an old player or radio with a similar microcircuit from where you can drop it out.
At this stage, you should also check the fastening of all elements on the main board of the key fob. Quartz (a fragile part on two legs under the display) can often come off the processor after the keychain has been dropped; it can be glued with thermal paste. In place of the old button, solder paste (flux) is applied and cleaned with a copper braid. Next, a new button is installed, and all contacts are carefully sealed. We remove the soldering paste with anti-flux and remove carbon deposits and other “industrial” dirt with a toothbrush using a cotton swab dipped in alcohol solution. Some old key fobs have special "trimming" capacitors, so it is not recommended to wash the entire board with an alcohol solution in this case.
The display on the key fob also changes with your own hands, you will need a new display and soldering tools, as well as a multimeter, screwdrivers and other tools. If the malfunction cannot be solved by soldering and replacing structural elements with your own hands, it is advisable to purchase a new key fob, since repairs can be even more expensive.
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It would seem that what is easier - to take and replace the battery in the alarm key fob. The owner himself will be able to perform this action without errors. Only now, after the replacement, the connection between the key fobs and the signaling is somehow lost. In fact, there is a loss of synchronization, and the consequences of this "loss" can be corrected according to the text of the manual supplied by the manufacturer. Here it is considered what actions should not be allowed when repairing car alarms, as well as immobilizers and key fobs.
A key fob with feedback, or the so-called pager, contains several elements in its design. The display is connected to the printed circuit board via a ribbon cable. But it is difficult to solder this part (loop) in practice. This is precisely why the replacement operation has an increased cost.
Nevertheless, you can do this replacement yourself. What is proven in the video.
Having disassembled and opened the plastic case, you will notice an important detail covered with a metal shell. The cylinder is a watch quartz, and you need something similar.
Let's say the pager display shows that there is no connection. In this case, the repair of the alarm key fob is done as follows:
Solder the junction with the antenna, perform assembly, check;
If the defect remains, change the main quartz.
In general, the repair of car alarm key fobs does not involve searching for defects using special equipment. More often they are guided by logic, changing "suspicious" nodes and details. They also strive to eliminate mechanical defects: they replace button modules, restore contacts. The main thing is to remove all power supply elements before soldering. And wait 20 seconds.
Do-it-yourself keychain repair is a painstaking and difficult job. Having removed any battery, it will be necessary to restore the synchronization. But the equipment working with the dialog code does not lose synchronization.
Any modern car has a module that automatically blocks the engine. Such modules are called "immobilizers", and their malfunctions are characterized as follows:
The starter cannot be started even with your own (standard) keys;
Commands from the remote control buttons (key) are not perceived in any way.
It happens that the malfunction lies in the electronics of the console. But hardly anyone will undertake to repair it.
Here, it is considered how to repair the immobilizer, more precisely, the antenna and the main unit. The unit itself, at least, can be disassembled by hand, without using special equipment.
The standard equipment of the MAZDA GF-626 car is an immobilizer, in which the main communication frequency is set by a ceramic resonator. The specified detail looks like this.
Over time, the parameters of the parts change. Therefore, the repair of the immobilizer will consist of the following: we solder the "bad" resonator, install a new quartz in its place. The frequency of the quartz resonator can be selected experimentally (here the numbers 2.4576 are indicated on the case).
Let us make a digression regarding the choice of resonators. Having bought a replacement quartz with the corresponding numbers, a good result can not always be obtained. The reason is the following:
Low thermal stability;
Frequency jitter.
In general, a new part is selected as one of several. What you need to know when repairing an immobilizer, key fob and even an alarm. Who said it would be easy?
The immobilizer reads the data from the key, establishing communication with the latter by radio. For standard car systems, the following is characteristic: an inductive antenna is wound around the ignition lock. For example, you cannot start the starter even with your own keys, stitched in the memory of the main unit. Then the immobilizer repair begins with checking the antenna, completely disconnecting it from the connector.
The external view of the antenna module is shown in the figure above. It may turn out that the resistance between the black and white wire is equal to infinity (open circuit).
No one will be able to wind a similar coil with their hands. But you can do the following:
A soldering iron without solder is installed between the turns, and each turn goes through this way until the ohmmeter shows 5-10 ohms;
The gap is eliminated, even with the appearance of short-circuited turns.
When carrying out alarm repairs, you will not encounter the problem discussed here. The antennas are located there in a separate module, and their appearance inspires respect.
Consider the diagram of the main module of a homemade alarm.
The value of all resistors sometimes has to be selected so that the operation is stable. This must be remembered when repairing an immobilizer or signaling that does not have electromagnetic relays in its circuit.
Alarm repair is a difficult task, and special training is needed to solve it. But the block design provides for the replacement of blocks. This property should not be neglected in practice. The choice between the speed of repair and the cost due to the price of a block or module will be made by the owner.
There are many publications on how to fix a car's electrical equipment with your own hands. These publications provide advice: you need to disconnect the negative terminal of the battery. Probably, no one should neglect this recommendation. We wish you success.
VIDEO
During the operation of the car, it becomes necessary to repair its systems and assemblies. The security system in this regard is no exception.To save money, you can do it yourself. In this article, you will learn how to repair car alarms and key fob with your own hands.
All alarm faults can be conditionally divided into the following types:
nutritional problems;
wiring problems;
software failure;
false positives;
malfunction in the key fob.
Let's take a closer look at each of the malfunctions in car alarms.
Power problems are often the cause of alarms not working properly. This can happen both with the equipment installed on the car and with the car alarm key fob. The system is de-energized due to a discharged vehicle battery. The car stops responding to the owner's commands. The battery, which serves as a power source for the key fob, can also be discharged. In this case, the lamp and display of the device will turn off. A decrease in the battery charge can be noticed in a timely manner by decreasing the range of the key fob.
Defects in the wiring sometimes become the cause of the system being de-energized. Over time, the contacts oxidize, which leads to the interruption of the transmission of electricity. The wires themselves may also be damaged. This happens during the installation of additional equipment or when attempting to steal the machine. Another reason is faulty fuses. The symptoms are the same as with power problems - the car does not respond to commands. This is provided that the key fob is in working order.
Sometimes car alarm malfunctions are caused by incorrect operation of the control unit - the "brain" of the system. This is due to a software failure.
These malfunctions are caused by errors in the setup or installation of the car alarm. If the sensitivity of the sensors is set too high, then the alarm will be triggered at the slightest shock or vibration. Alarms can be caused by small dry tree branches falling onto the machine, rain, or even a loud sound. Sensors set for optimal sensitivity, but installed on plastic parts, will also not work correctly. The fact is that plastic amplifies the vibrations that the sensors perceive. When heated, this material expands, which can trigger the sensors.
During operation, the key fob may start to work incorrectly or even break down. The reasons for this are wear and various damage caused by falling or exposure to water. A cracked display significantly reduces the information content and usability of the security complex. Dropping the key chain can also damage the quartz.
Before starting to repair car alarms, you need to find the cause of the malfunction. Completely different breakdowns can have the same symptoms. To accurately determine the cause of the malfunction, it is necessary to consider all possible options in stages.
You need to start with the key fob. Inspect it for mechanical damage and traces of water. If the key fob gets into water, condensation will form on the inside of the display lid. The operation of such a device (if it turns on) will be unstable. If the key fob did not fall and fell into the water, but the display is turned off and nothing happens when you press the buttons, then the discharged battery is to blame.
If the key fob is completely functional, but nothing happens when you press its buttons, then there may be two reasons for this - strong external interference or problems with the car and the alarm. Try to bring the key fob to the part of the car where the car alarm antenna is installed and press the button. If nothing happens, then the malfunctions need to be looked for in the car itself or in the alarm equipment installed on it.
Next, power and wiring diagnostics are performed. Check the battery charge and inspect the terminals for oxidation.The full charge of the battery can be easily determined by the operation of the on-board electronics. If everything is in order, then the next step is to check the wiring. To do this, you need a special tester with which the contacts are called. Inspect the wires for mechanical damage. Special attention should be paid to fuses. Usually they are in a box, which is located on the wire coming from the positive terminal of the battery.
If the cause has not yet been found, then a defect in the control unit or a failure of its software is to blame. It will not be possible to eliminate such a defect with your own hands, but with a software failure, everything is much easier - it is enough to carry out simple manipulations, which we will talk about below.
Most often, a car alarm key fob requires repair. The buttons wear out and begin to react poorly to pressing, and the device itself may fall on the asphalt or into a puddle. Button repair includes disassembling the case, cleaning the contacts and replacing the button pads (if necessary). To lift the recessed buttons, you can make a plastic backing that sticks to their seats on the board.
Most often, when the key fob falls from its board, quartz comes off. To eliminate this defect, it is enough to disassemble the keychain and solder the quartz to its original place.
To fix cracks in the display, you need to completely replace it. Remove the old display, strip the contacts and solder the cables of the new display. The process itself is not very complex and requires initial soldering skills. The difficulty lies in finding a new display. You can hardly find it in stores, so you will have to order from China via the Internet. Defects caused by water ingress cannot be eliminated by yourself.
Power and wiring problems are solved by stripping the battery contacts and terminals, and replacing fuses and damaged wires. To avoid unnecessary work, use the tester to find the exact cause of the problem and then fix it.
To eliminate the problem of false alarms, it is necessary to adjust the sensitivity of the sensors. The adjustment process is extremely simple. To do this, screw in or unscrew the adjusting screw located on the sensor housing.
To resolve software crashes, you need to reboot the system. To do this, de-energize it by disconnecting one of the terminals from the battery for a few minutes. If this does not help, then set the factory settings of the car alarm. Step-by-step instructions for resetting the settings can be found in the instructions for your alarm model.
The best way to test your car alarm is to use it as directed. Arming the car and try to open doors, trunk or hit the car. You should hit the wheels, hood and windows, gradually increasing the force of the impact. After checking the sensitivity setting of the sensors, open the car door with the key and try to start it, also using the key. The alarm should go off. Check the rest of the functionality, depending on the specific model, the functionality will be very different, we suggested how to check the basic and general alarm functions.
Most of the problems associated with the operation of car alarms can be eliminated by hand. It is better to entrust the repair of the control unit and other complex electronics to specialists. If, after following the above recommendations, the breakdown is not eliminated, then you need to contact a car service. To continue driving with a broken alarm, you need to master the process of turning it off with a secret button, which you can read about in the instructions for the car alarm.
Consider all sorts of problems with alarms, troubleshooting for these problems and, in fact, the repair itself.
We need tools:
The multimeter in the circuit test mode shows that the tested conductor is healthy.
Tester / multimeter;
Screwdriver;
Hair dryer;
Soldering iron with tin;
Alcohol;
Microfiber cloth;
Toothbrush;
Solvent;
Tweezers.
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Here and further, you need to set the multimeter to the circuit check mode - a beeping and a one on the display indicate the health of the circuit.
The automotive tester, if the circuit is working properly, signals this by lighting the indicator lamp.
The battery on the key chain has run out. We just change the battery and see if it works or not. If you have a tester, you can check whether the battery is delivering the declared voltage - if it does not, then you need to change it.
Water got into the keychain due to rain, snow, or falling of the keychain into a puddle, bath, river, washing machine, etc. Disassemble the keychain, dry it with a hair dryer, clean the contacts with alcohol and a napkin, wait for the alcohol to evaporate. Then try turning on the device with a new, good battery. If after that the key fob does not come to life, try ringing the contacts with a tester - if there is no contact somewhere, you can try to solder such a contact. If after that the key fob has not come to life, there are two ways out: take it to the cell phone repair, or just buy a new one.
The key fob fell from a height, which led to damage to the receiver board or the so-called "quartz". In this case, it is necessary to disassemble the key fob, for which it is usually enough to pull out the battery, and then unscrew one or two screws in the battery compartment. There are two microcircuits inside the keychain, which should be disconnected - a microcircuit without a display (radio module) is a transmitter, and it rarely suffers from falling. The microcircuit with the display, on the other hand, has a part set on two legs, which easily comes off under mechanical stress. This part, called "quartz", we should solder back. The process of its restoration is shown in the video.
The buttons on the key fob stick. Again, we disassemble the keychain, disconnect the microcircuits, and then go through the buttons with a toothbrush soaked in solvent. At the same time, we try not to damage the display.
The microcircuit contains a current generator, so only work with it with dry hands and with rubber-soled shoes. An electric shock from a circuit element is harmless to your health, but it is felt enough for you to throw the circuit out of your hands and damage it.
If the key fob works, but the alarm still does not respond to it, you need to continue the diagnostics further ...
It is necessary to check all contacts for oxidation using the same tester. If a wire does not ring, you should replace it, or clean it with alcohol, and in extreme cases, re-solder the contacts. If there are no problems with the wiring, we continue the diagnosis.
Actually, this should have been done before manipulating the key fob and wiring, but it makes sense to do this at this step as well.
Disconnect the vehicle electronics by removing the battery terminal. Wait 3 minutes and put the terminal back. Just get ready to trigger the car alarm from such manipulations - it should be so. If this does not help, we are looking for the malfunction further ...
We are interested in the following fuses:
By the look of the insert inside the fuse, you can understand whether it is working properly.
Fuse on the positive battery cable. Looks like a wire with a box.
Fuse for emergency gang.
Fuse for horn.
Ring the fuses with a tester, or check visually. An example of working with a multimeter is shown in the video:
If none of the diagnostic steps revealed a malfunction, or you have eliminated the malfunction, and the alarm still does not work, you should contact the service center.
The most common incident with an alarm is that arming or disarming does not work. Usually the key fob is to blame - bring it as close as possible to the alarm control unit and press the button again.Did not help? We remember the battery, and try to remove the terminal for a while, and put it on again. In most cases, this helps.
It is very likely that the problem is not with the alarm itself, but with the battery. When it is discharged and the voltage in the mains falls below a certain value, the alarm starts to consider that they are trying to steal the car.
In this case, you need to remove the battery terminal and then charge it. Then the problem will be solved.
Car alarms, like any other car system, can sometimes fail. If you are not an expert in the field of electronics, then it is better to entrust the repair of an alarm on a car in terms of its brains to a professional auto electrician.
There are situations when the malfunction of the alarm is not related to the operating system, and in this case it is quite possible to eliminate the breakdown with your own hands. In order not to panic ahead of time, not to transport your car to a car service, you need to have an idea of the typical malfunctions of car alarms.
In this case, self-carried out repair of the car alarm will save you from unnecessary worries and unforeseen blows to the budget. To repair an alarm on a car, the traditional driver's tools should always be at hand: screwdrivers, wire cutters, electrical tape, a couple of wires, a tester (a light bulb with two wires for "ringing").
VIDEO
Important! If your car alarm is still under warranty, then, of course, you should not interfere with it yourself.
Nutrition. The alarm does not respond to your clicks, or performs actions that you did not order. We start checking with the keychain, namely with the battery. Disassembling the keychain and replacing the battery will not take much time. A characteristic sign of a low battery is that the LED becomes dimmer, or the remote control range of the remote control decreases. Another reason for the failure of the remote control may be the ingress of water on it (when used in the rain).
Wiring. No matter how complex or advanced car alarms, be it a conventional AOC buzzer (car security alarm) or a GSM alarm - under the influence of external factors, the contacts at the connection points are always oxidized. That is, car alarm repair always begins with ringing the contacts.
The LED lights up brightly, and the alarm does not respond to pressing. In this case, we start repairing the alarm on a car by finding out the reasons for this phenomenon. The "brain" of the AOC could freeze, because in any case we are dealing with a mini-computer. Restart required. It is necessary to remove the terminal from the battery (any), i.e. de-energize the system and put it on again after a couple of minutes. If the alarm has started, you can fix the terminal, no - try rebooting 2-3 more times. If it does not work out, then we proceed to the next stage of repairing an alarm on a car - checking the fuses.
Circuit breakers. If from the positive terminal of the battery (or from wires with a permanent "plus") there is a separate wire with a separate fuse block, check the fuse. Once we have started, at the same time we need to check the health and functionality of the main power consumers of the car (standard fuses): emergency gang, sound signal. During this test, the power supply is called by "minus" (this type of testing can be carried out if you know where the central AOC unit is located). In this case, the AOC is reset by the following method: remove the connector from the unit and reconnect it. If the beep sounds, it's okay.
If your efforts to repair the alarm on a car are not successful, then you will have to contact a car service, the cause of the malfunction turns out to be deeper.
VIDEO
There are many factors affecting the fact that the car alarm may not work. Electronics is a delicate thing. Do not panic in these cases.Test the system and most likely, repair of the car alarm may not be needed. Most often, when you press the key fob, the arming (disarming) function does not work. Why and what should be done?
Bring the key fob closer, preferably to the location of the central unit, and try to press it again.
It did not help, restart the system by manipulating the battery terminal.
This may be due to the presence of powerful industrial facilities in the parking lot. The key fob signals are simply "clogged".
Another option: the car stalled or you turned off the ignition, and when you try to start, the alarm starts to work. Most likely, you have lost the battery charging, it is discharged, the car will not start. And the alarm reacted to a voltage drop below 8V (this is a precaution for attempts to steal a car by removing the terminal from the battery). In this case, you need to disconnect the siren and start troubleshooting the battery.
Actually, these are the reasons for a car alarm malfunction. The most important thing is not to despair, but to try to repair the alarm on the car yourself, if it is not under warranty or is not a super-sophisticated GSM alarm system. We hope that the information will help you not only to repair your alarm, but also save money.
VIDEO Good luck to you lovers of your car.
Breakdowns of car alarms are a common occurrence that is caused by problems of a completely different nature. Even the premium signaling system is not immune to malfunctions. Problems of this nature are solved in specialized salons, but it is not always possible to go there. If a minor defect is identified, the vehicle owner is confident that he can fix it on his own, it is worth trying to make minor repairs at home. How exactly to produce it will be highlighted now.
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Modern signaling systems are divided into several types. Some are connected by standard
method - using wires, others are wireless, and another category involves combining the two types of connection. Each person, choosing a security system, is guided by their own ideas about the ideal car alarm, guided by their financial capabilities. The reliability of all security systems is confirmed by quality certificates, but one small breakdown is enough for the integral mechanism to stop working in a harmonious mode. Because of what alarms break, how to repair them, motorists will be able to find out now.
So far, there are few fans of wireless signaling systems, but the standard model is on every car. It is on her example that possible breakdowns will be determined. A standard alarm that is connected to the car with a wire can break for the following reasons:
incorrect operation of the vehicle control system;
mechanical damage to the central unit;
breakage of signaling wires;
work at temperature conditions that are lower or higher than recommended;
software failure due to attempts by unauthorized persons to gain access to the security system;
lack of normal voltage, poor performance of the car battery;
inaccuracies made during system connection;
incorrect operation of control key fobs.
To repair the car alarm with his own hands, the driver must turn it off completely, find the cause of the breakdown, and eliminate it with high quality. To disable the security system, you should use one of these methods:
special computer support;
killers or linemen;
jack emergency shutdown button;
introduction of a personal code value.
After completely disabling the security system and its siren, the driver needs to start looking for the problem. To do this, he needs to go through a couple of simple steps in the following sequence:
inspection of the standard connection diagram - it will tell you exactly where to look for the problem if the person does not set the alarm yourself;
inspection of the central unit of the car, checking the correct connection of the wires and their integrity;
checking the LED indicator, latching relay, limit switches, sensors and siren;
checking the quality and power of the current supply, the operability of the key fob.
After finding the source of the problem, the driver needs to deal with it. To do this, he should prepare the appropriate tools, if necessary, dismantle the alarm. If the cause of the breakdown of the car alarm could not be found, the car owner should contact the service center for help.
The car dealership will carry out a full diagnosis in a short time, they will be able to determine the exact location of the problem, and solve it at a professional level. If the driver is not sure that he will be able to make the repairs correctly, it is better for him not to do it with his own hands, because it will only get worse. Standard problems of signaling systems are resolved quite quickly, without significant material damage to the car owners. If professional assistance cannot be provided, the system is completely out of order, the driver will need to replace it, which is also done in specialized repair centers.
VIDEO
Repair of alarms of any level of complexity should always be carried out professionally. If this is not done on time, the system will completely break down and the driver will have to spend money on a new alarm system, which is undesirable in any case, because it requires high costs. Repairing the security system is a responsible business. If the owner of the vehicle does not have the skills in this matter, he should not eliminate the cause of the malfunction himself. It is better to pay for a good repair than to buy a new car alarm later.
If the alarm key fob does not work, then the control of the anti-theft complex becomes less convenient. You can repair the device yourself, but for this you need to understand the reasons.
The reasons why the Alligator, Jaguar, Panther or other signal stopped responding with or without feedback may not be related to a pager malfunction. But usually the problem is caused by the work of the communicator.
If the alarm for a Tomahawk, Mongoose, APS or Starline A91 car does not respond and stops responding to any signals, you first need to diagnose the batteries in the key. The problem may be associated with their discharge or displacement at the installation site. A decrease in charge is usually accompanied by a decrease in the range of the communicator, as well as dimming of the diode indicator and display.
Elimination of the malfunction consists in replacing the power source, for this you need to disassemble the communicator case and gently knock it on a hard surface. The battery should fall out of the seat, after which a new battery is inserted into it. If the problem was in the battery, then after replacing it, the device will be triggered by pressing the buttons.
GO FASTRELIABLE spoke about replacing the power supply in Starline E90 communicators.
If the system of Scher Khan Magicar, Alligator, Cenmax or other model on the car stops starting, this may be due to the vehicle getting into an interference area. Such zones are usually located in close proximity to closed buildings, airports, as well as sensitive enterprises and are more typical for large cities.An electromagnetic field, a place of a large congestion of cars or collector cars can act as a source of interference.
You can diagnose the cause yourself by bringing the communicator close to the antenna adapter and clicking on the pager control buttons. If this does not help, then the car must be driven away from the potential place of accumulation of interference by 200-300 meters and the steps must be repeated.
Problems in the operation of the car alarms Pharaoh, Sherkhan or any other can occur as a result of the discharge of the car battery. If the voltage level to the on-board network has dropped to a critical value, this parameter will not be enough to execute commands. The problem with voltage drops can be caused by low temperatures, which are typical for the cold season. To rectify the situation, you will need to recharge the battery and run its diagnostics.
As a result of long-term operation, the range of operation of a car alarm transceiver, for example, Pandora or Sheriff, will decrease. This may be due to a breakdown of the antenna module or its incorrect operation; the device is usually mounted on the windshield of the car.
Decrease in the radius of action may be due to mistakes that were made when installing the anti-theft complex. If the transceiver is located near metal parts and surfaces with a close distance of less than 5 centimeters, it will degrade performance. In this case, it is advisable to reinstall the device.
Eduard Nikolaev spoke about the implementation of a practical method for increasing the range of the pager antenna.
If the remote control can be bound, but it refuses to send signals to the transceiver, or the processor module does not receive them, you need to contact the specialists. The reason may be the need to rewrite the communicator or control unit. To complete the task, the anti-theft complex is disabled abnormally. You can try to re-bind the pager, the procedure is performed in a specific algorithm, which is described in detail in the service manual for the system.
If the described actions did not help and the alarm key fob does not work, then to determine the causes of the malfunction, you will have to disassemble it. The procedure requires the use of a soldering iron with consumables, a tester and an oscilloscope.
The pager case must be opened and visual diagnostics of the board and its main components must be performed for damage and cracks. The reason may lie in poor quality soldering of the elements.
If there are traces of dirt and dust on the board, they should be removed using a regular construction or drawing brush. It is not recommended to treat the board with alcohol or solvents, as this can damage the capacitor devices.
If the diagnostics showed the disconnection of the contact elements, they must be carefully soldered back. A thin tip soldering iron should be used for soldering. During the process, you need to be careful not to allow tin to get on other elements of the board.
The voltage parameter on conductors and other components is checked using a multimeter. It is necessary to make sure that the buttons and the diode light are in working order.
Alexey Tretyakov showed how the procedure for checking the communicator and measuring the current consumption of the device is performed.
Using the tester, you need to diagnose the energy consumption of the batteries when you click on the buttons, the operating parameter should be no more than 10% of the total battery charge. When disassembling the device case, it is necessary to carry out its diagnostics for the activation and response of the anti-theft complex when the keys are clicked.
If there is no connection between the key fob and the system, diagnostics of the trimmer capacitor device is performed.
Using a dielectric screwdriver, this element can be scrolled by pressing the button and activating the setting mode.If, having turned the device 10 degrees, you did not notice the synchronization of the complex with the communicator, then the procedure is repeated. It is necessary to engage in the task only if you have skills in the field of electronics and electrical engineering. Otherwise, it can lead to breakdown of the anti-theft complex.
Diagnostics of the microprocessor device:
Use an oscilloscope to diagnose the power to the device.
Diagnose the generating set and make sure the impulses are running. Verification actions are performed on the terminals of the microprocessor device.
Make sure that the impulse output from the communicator is on one of the block contacts. Evaluate the correctness of the encoding of the transmitted packet data and check the signal transmission frequency. This is required in order to ensure the presence or absence of impulses.
If there are signals, but there was no response, look for the reason in the communicator.
There are two options for how the user should act when the signaling fails:
To perform an emergency shutdown of the protection mode, use the Jack or Override button, as well as a personal password. The code is provided to the consumer along with the alarm, the button is mounted in a hidden place in the car interior and is often masked as a bundle with standard wiring. To enter the password, the key is pressed sequentially with the ignition off or on. Depending on the model of the complex, the standard controls on the center console can be used for emergency shutdown.
You can improve the efficiency from activating the signal. This method is simple but effective. The car doors are opened with a key, and the control panel must be brought as close as possible to the antenna module or processor unit. The siren mute key is clicked quickly several times.
Both of the described options for deactivating the alarm are considered emergency, we do not recommend using them constantly.
Video (click to play).
The AUTO RES channel provided detailed instructions for repairing the anti-theft complex control pager.