DIY car alarm keychain repair panther

In detail: do-it-yourself panther car alarm keychain repair from a real master for the site my.housecope.com.

Unfortunately (for car enthusiasts), fortunately (for entrepreneurs), services that have a column in the list of services: repair of car alarm key fobs are flourishing, and all because they have enough customers. The installation of a security system designed to protect against theft of a vehicle, it would seem, should solve all the problems of the car owner, but no one is insured against breakdowns. And, as a rule, the most vulnerable element of the system breaks down, namely: the alarm key fob.

If the car alarm stops responding to commands from the control panel (key fob), then first you need to understand what is the reason for this development of events and only then decide what to do in this case?

There are enough reasons to either contact a company that repairs alarm key fobs, or spend time studying this issue in order to further self-repair the key fob. For an overview of the list of the most common malfunctions of key fobs and their causes:

The buttons do not respond. The problem may be due to:
- sticky buttons;
- failure of the button itself, contact or wire as a result of natural wear and tear or mechanical impact (shock);
- the absence of a sufficiently strong fastening of one of the elements of the main board (the contacts have moved away).
- Weak backlighting. The indicator LED is dim and the screen is dark. A malfunction can be triggered by:
  - insufficient charge of the power source (battery);
  - failure of the controller;
  - the departure of quartz from the processor;
  - violation of the integrity of the fastening of the contacts (often observed after the fall of the car alarm key fob).
  - There is no feedback. The system does not respond to commands sent from the remote control. Possible causes of the malfunction:
    - decoupling the keychain (violation of synchronization between the remote control and the elements installed on the car);
    - wear (breakage, damage) of the transmitter reception antenna;
    - the installation of the alarm was performed incorrectly (errors either during installation or during connection).

Video (click to play).

There are other reasons forcing the motorist to use the service: repair the alarm key fob or try to return this important element of the security system to its original characteristics with his own hands.

If the key fob is broken, it is not at all necessary to immediately buy a new control panel. In most cases, a faulty key fob can be reanimated. Some breakdowns can be repaired by yourself. In this case, you need to act in stages:

Step one (diagnostics). First, you need to identify where the failure occurred (disassemble the key fob into its component parts, ring the board contacts, the tester will point out problem areas, check the condition of the battery, carefully inspect every detail for damage or wear).
Step two (assessment of opportunities). Based on the results obtained, decide how to proceed (contact the professionals or still repair the keychain with your own hands).
The list of tasks that you can cope with on your own (if you have basic knowledge that does not imply special training) includes the following items:

replacement of parts (a car enthusiast can himself replace such elements of the keychain device as: case, display, button, but there is one "but": finding spare parts for some alarm models is quite problematic);
soldering contacts (gluing quartz with thermal paste);
reprogramming the control panel (detailed information on how to bind the key fob to the alarm, including the one already recorded in the system memory, can be found in the operating instructions).

Step three. Directly troubleshooting, performance check.

If it was not possible to repair the keychain using your own skills and abilities, it makes sense to seek help from specialists. At the same time, neither the brand of the alarm system (Starline, Sherkhan, Pandora, Tomahawk, Pharaoh and others), nor the type of security system (GSM, GPS alarm), nor its class (economy, business, premium) matters. Highly qualified craftsmen are able to restore the functionality of any alarm key fob (if possible and justified).

The list of works available to clients of such a service includes such actions as:

diagnostics of the technical condition of keyfobs (carried out using modern equipment that allows you to get accurate results within just a couple of minutes);
replacement of parts (display glass, display itself, faulty button, damaged case, metal or plastic antenna, battery cover);
restoration of the microcircuit (elimination of breaks in the circuit of the main board);
car alarm key fob coding (reprogramming - in case of successful repair of the old one, binding of a new one - in case of an unsuccessful attempt to repair or its recognition by the masters as inexpedient).

What are the advantages of a professional renovation? In 100% quality of the work performed, confirmed by warranty obligations and in a short time to solve the problem.

What is the disadvantage? The need to part with your own finances.

Summing up, I would like to say: in most cases, a car alarm key fob can be repaired. Breakage is not a sentence yet!

The car alarm system of the famous and popular model pantera qx-55 is a small plastic box with a pack of cigarettes. All peripherals are connected to it - locks, sensors, turn signals, a signal, and a small vibration sensor box. It is made according to a rather interesting principle with a ZP-shka as a sensitive element.

All this economy is interconnected by an unthinkable number of wires, among which it is very easy to get confused when connecting. What actually happened. The owner tried on his own to rearrange the car alarm to another car, the sad result of which we are seeing.

We open the box and see a small board with several relays and a small scarf of a super-regenerative receiver on the side. And then the savings!

You can feel the unforgettable smell of burnt electronics. And here's the reason - a charred powerful transistor. Of course, we will not call him :) Everything around him is burnt, so all the surrounding details are worth checking.

One of the diodes, IN4005, was broken and rang shortly. The rest of the elements seem to have survived. We solder the transistor and not finding a similar one at hand, we use everything that is available. Judging by the form of the transistor and the place of its installation - the collector switches two relays, it should be about 50V 10A. The structure is pnp, since the emitter goes through the relay to the plus of the power supply.

Read also: DIY tin roof repair

Having restored the burned-out tracks, we temporarily solder the existing analogue - KT818. It is advisable to solder in this case not immediately to the signaling board, but through the wiring. Double-sided mounting is not so easy to solder, and even more so, in case of failure, to unsolder.

We connect the power - the LED blinked, we hook on the necessary contacts a howler, and try to press the “close” button on the key fob. The signal beep once. By pressing the "open" button, we force the alarm to beep twice and click the turn signal control relay. But the sound is not very good.Instead of a short, crisp peak-to-peak, there is a slightly blurry poo-oo-oo. We replace KT818 with some powerful imported pnp. Now the signaling is clear.

Everything seems to work. To finally make sure of this, we give a load of a 12V bulb to the relay outputs and by clicking on the vibration sensor, we make the signal roar, and the lamp blinks. Repair of the pantera qx-55 alarm, made successfully.

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 instructions for use. 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 memorization of various functions and key fobs.

Sometimes the key fob can freeze even with a working battery. This happens when the alarm is in the range of radio transmitters, the so-called car alarm jammers. In addition, the operation of the key fob also depends on the state of charge of the car's battery. In the first case, it is necessary to perform an emergency unlocking of the car alarm and leave the range of the transmitters, in the second, to replace the battery and reconnect the wiring.

On some cars, connecting the alarm system involves supplying a separate positive lead 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. Image - DIY car alarm keychain repair panther

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. Often, after dropping the keychain, quartz (a fragile part on two legs under the display) can come off the processor; 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.

Do you still think that car diagnostics is difficult? If you are reading these lines, then you have an interest in doing something yourself in the car and really savebecause you already know that:

STO lomat big money for simple computer diagnostics

To find out the error, you need to go to the specialists

Simple wrenches work in the services, but you can't find a good specialist

And of course you are tired of throwing money away, and there is no question of driving around the service station all the time, then you need a simple ELM327 AUTOSSCANER that connects to any car and through a regular smartphone you will always find a problem, pay off CHECK and save a lot.We have tested this scanner ourselves on different machines. and it showed excellent results, now we recommend it to EVERYONE! So that you do not fall for the Chinese counterfeit, we publish here a link to the official website of the AutoScanner. Image - DIY car alarm keychain repair panther

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.

The anti-theft complex control panel is the main control device. If it breaks down, the consumer will be able to use the main signaling options - enabling and disabling the protection mode, but other functions will be unavailable. Repair of the car alarm key fob can be done by hand.

If there are problems in the operation of the power supply, the remote control buttons will stop responding to commands, and the transmission of signals will be malfunctioning.

Sometimes the communicators of the Alligator, Sherkhan and other models alarms randomly send commands to unlock or lock the door locks. In most cases, the reason for this is a faulty power source, this will also be reported by a weak glow of the diode lamp on the device body or the absence of a signal. To make a diagnosis, you can use a multimeter, but it is better to immediately change the battery.

In some models of Pandora, Starline, Panther and other signaling devices, after changing the power source, reprogramming the device is required in order for the device to work. The binding procedure is always described in detail in the technical manual.To carry out this process, you will need to find the Jack or Override service button, which is used for emergency shutdown of the complex. Depending on the model, the button must be pressed several times with the ignition switched off or activated; check the exact number of clicks in the service book.

The Telemaster Korolyov channel tells about the reasons for the failure of the Starline key fob button and its repair.

It happens that the car alarm key fob freezes with a working power source. This problem usually manifests itself if the car is located within the range of anti-theft jammers or other sources of interference. The solution consists in emergency shutdown of the protection mode, after which the car owner must leave the interference zone. The operation of the communicator largely depends on the amount of charge of the machine battery, so if the battery runs out, it must be charged or replaced.

Sometimes the problem can be solved by rebooting the processor module, for this you need to remove the plug from the connector, disconnect the battery and turn it on again after a few minutes. A sound signal may sound, the pager will restore its work, if this did not happen, then the malfunction should be looked for in the operation of the board and contact elements.

You can repair a broken communicator yourself, we will analyze the repair process using the example of a pager from a Tomahawk 9010 signaling system. Practice shows that the control devices of these models fail more often than others.

AlanMorfreeman told about the repair of the pager.

You need to repair the device after disassembling the case:

After diagnosing the board, the fasteners are checked on the diagram:

If the pager fell, the quartz element could be disconnected from the main processing unit. This part is rather fragile, it is fixed on two contact elements under the screen. In case of minor damage, quartz is glued to the board with thermal paste.
Instead of the old key, a flux is applied to the circuit, stripping is performed by means of a copper braid.
A new key is being installed, all contact elements are securely soldered, this requires a soldering iron with a thin tip.
Solder paste residues are removed from the board using a toothbrush and anti-flux. Remnants of carbon deposits and dust are removed. To do this, take a cotton swab and treat it with alcohol. It is not recommended to completely process the circuit with liquid; trimming capacitor devices can be used in older communicator models. Exposure to alcohol will cause damage.
You can change the screen on the device yourself, for this you need a new display. Work is performed using a tester, screwdrivers, soldering iron and other tools. Before installing a new screen, all remnants of cracked glass are removed from the board.

Read also: DIY Chinese watch repair

Anton Baitov spoke about how to repair the keys of the transceiver.

If you cannot repair the car alarm key fob by soldering, it makes sense to buy a new communicator.

In large cities, there are dozens of specialized service centers that offer services not only for repairs, in such workshops you can find used keys with key fobs from different models of signaling devices. Pager repairs are often done by qualified electricians. You can find specialists without leaving your home by looking at advertisements on the Internet.

Many service centers today offer communicator repair services:

replacement of screens on consoles;
replacement of pager cases, protective glasses, contacts, etc .;
full restoration or reconstruction of devices, flashing of devices.

The cost of the service depends on the nature of the breakdown. The minimum repair price will be at least 250 rubles, the region of residence and the alarm model play a role in determining the cost.To repair communicators of modern complexes, you will have to pay a higher amount. Button replacement services are less expensive than repairing a board or changing a display.

The cost of repairing an alarm key fob depends on the type of malfunction.

Eugene Irimia clearly showed the procedure for repairing keys on the DaVinci car alarm pager.

Surely many of our readers have encountered problems related to alarm systems. Sometimes they howl for no reason or stop responding to button presses. There are other common problems that we will tell you about below.

Modern signaling consists of the main components, among which the following can be distinguished:

anti-theft system or immobilizer;
means of notification;
different sensors;
blockers;
additional locks.

The main detail is the immobilizer, as it is considered to be the brain of car alarms.

The immobilizer of any alarm consists of an anti-theft relay and a control unit installed in a break in the vehicle's electrical networks. In modern systems, these elements are not connected to each other by additional wires, so they remain invisible.

When we press a button on the remote control, the encoded signals, after recognition, are transmitted to the vehicle's OEM electronics. Depending on the immobilizer model, some alarms can recognize drivers by an electronic tag or fingerprints.

The situations in which motorists can find themselves due to problems with alarms are very different. They are often associated with the operating system of the hardware. In this case, you can solve the problem yourself.

The main weapons of the car owner against breakdown are the following tools:

You should start with the main thing - this is nutrition. The alarm can stop responding to the button or turn itself on. In this case, you need to start the check with the key fob, or rather, with the battery, which can just sit down. You can easily notice this even before the problem appears: the LED will start to glow dimmer, and the range of the key fob will noticeably decrease.

Another reason for the malfunctioning of the key fob is water that gets into it during the rain or when it falls into a puddle.

If there are no problems with the key fob, the second step in troubleshooting should be checking the wiring. Despite the type of signaling (no matter how modern it may be), contacts can oxidize over time. Use a tester - if the wires ring, the problem is not with the wires.

If the LED is brightly on, and the alarm stops responding to pressing the buttons on the key fob, reload the electronics. To do this, you need to remove the terminal from the battery and put it on again after 2-3 minutes. If this does not help, repeat the procedure.

With such manipulations, your alarm should work. If the method does not work, go to the next step - check the fuses. If a separate wire with a box leaves the positive terminal of the battery, it must be checked, since the fuse is probably there.

At the same time, do not forget to check the serviceability of the fuses on the main energy consumers of the vehicle, such as the sound signal and the emergency light. This is done in an elementary way: remove and insert the connectors of the blocks into place.

If you know where the central power control unit is located, you can ring it on the negative wires.

If even all this does not give you positive results, contact the service center. The problem can go much deeper. In this case, you will not be able to cope with it yourself.

Electronics are generally very moody, so do not be alarmed in unforeseen situations. Often, repairs may not even be required at all, but testing the system will not be superfluous.

In most cases, the remote control starts to glitch, namely the arming or disarming button stops working. In such a situation, try to bring the key fob as close to the central unit as possible and try again to press the button. If this does not help, reload the circuit using the battery terminal. Often this problem manifests itself along with the presence of a lot of interference that clogs the key fob signals.

Another type of problem that we want to address is related to the battery. If it sits down, the voltage in the electrical networks will drop below eight volts, and the alarm will react to this as an attempt to open the car. To stop the wild howling of the system, you need to disconnect the siren and try to solve the problem, but be prepared to explain to the nearest police officer that this is your car.

So, we have considered the most popular causes of malfunctioning car alarms. Once again, we want to remind you that in any case you do not need to fall into despair - you can always repair the system yourself or contact the specialists at the service center.

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 the indicated replacement with your own hands. 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 in 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 (click to play).