DIY car alarm alligator keychain repair

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

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.

Video (click to play).

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's 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.

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 a list of the most common keyfob malfunctions 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).

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 inappropriate).

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!

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.

Read also: DIY phone case repair

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.

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.

The alligator cm 30g car alarm is characterized by reliability, functionality and ease of use. This system is characterized by the presence of two-way communication, which ensures not only safety during its use, but also ease of use. Despite the high quality of the equipment, it is still prone to breakdowns. Any car owner will be able to repair the alarm due to the simplicity of its design.

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Most often in the alligator cm 30g car alarm, the key fob fails. There are more than enough reasons for the occurrence of breakdowns. If the key fob does not perform its functions, does not turn on, does not catch the car, beeps, does not react, then this indicates a breakdown and requires repair.

The key fob consists of a board to which the buttons are attached. If they don't work, then repairing the alarm is to solder the buttons to the board. For this purpose, you can use an ordinary soldering iron.

In most cases, car owners think that the alligator cm 30g car alarm has broken. But the cause of the breakdown may be a malfunction of the button on the key fob, which can be easily repaired with your own hands. If the equipment button is not pressed well, then it must be cleaned. For this purpose, it is necessary to remove the top cover from the alarm key fob. This algorithm consists in unscrewing the bolts with a screwdriver.

After removing the cover, it is necessary to carefully remove the board from the sm equipment key fob. In order to eliminate damage to the screen of the key fob, a soft cloth is placed under it. Next, you need to take medical alcohol and drip it a little on the button that does not work.

Alcohol should hit not only the button, but also the space between it and the body.

After that, you must press the button 10 to 20 times. Thanks to such movements, dirt will be washed out from under the button. After carrying out this procedure, it is necessary to blow off or wipe off alcohol and dirt from the button and the key fob body. After checking the functionality of the button, the key fob is completed in the reverse order. This completes the repair of the car alarm key fob button.

In order to ensure the full functionality of the alarm, it is necessary to program the key fob correctly. Initially, the ignition system is turned on. Next, you need to hold the VALET button in the on state for a few seconds. The button is then released. The procedure must be repeated three times. If it is carried out correctly, the car alarm emits a signal. The next step is to alternately press the buttons on the remote controls. On completion, you must turn off the ignition system.

If the sm alarm is not triggered using the above method, the second triggering algorithm can be used. Initially, it is necessary to turn on the ignition of the vehicle. Then the VALET button is pressed three times and held for a few seconds. After that, the car ignition is turned off. The next step is to turn on the ignition system again and press the buttons on the alarm key fobs one by one. Next, you need to turn off the ignition.

If the equipment is being repaired, then it is necessary to use these algorithms not only to configure the operation of the key fob, but also to activate the car alarm itself. In most cases, when using these algorithms, the recovery of the device's performance is observed.

It often happens that the alligator cm 30g device breaks down on the road. In this case, you can eliminate a minor malfunction. The main thing is not to panic. Initially, the alarm is tested, which allows you to determine the cause of its breakdown.

If the arming function does not work, then it is necessary to bring the alligator cm 30g keyfob as close as possible to the central unit of the device and try to arm the system again.

If the car alarm does not work, then it is necessary to reboot the manipulation system. For this purpose, the battery terminal is used. The reason for such a breakdown in most cases is the proximity to the vehicle of industrial facilities.

Some drivers have a situation when the car stalls and when they try to start it, the car alarm sm. The cause of such a malfunction in this case is the battery discharge and the car cannot start. The car alarm is triggered by a large voltage drop. In this case, the siren is turned off and the battery is repaired.

These two reasons are the most common on the road. In this case, the elimination of alarm breakdowns is as simple as possible. The car owner needs to calmly and slowly assess the condition of the equipment and start troubleshooting.

In order to fix the alligator cm 30g car alarm, you do not need to have special knowledge and skills. In this case, the motorist can independently make the simplest equipment repairs. If you cannot fix the problem on your own, then you need to seek help from specialists.

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. Image - DIY car alarm alligator keychain repair

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 the 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 car's original electronics system. 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 located 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 on your own.

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.

Many car enthusiasts know that a breakdown of a key fob near an alarm is a fairly common case. As a rule, due to the ingress of moisture and its frequent use with an effort above the norm, it leads to breakage of buttons and plastic surfaces, as well as structures of printed circuit boards with radio components.

Often, such keychains are not repaired at all in the workshop, many craftsmen are so arrogant that they consider it a trifle and do not undertake such repairs, or, say, they may ask for 1000-1500 rubles for repairs - almost like a new car alarm.

But it is difficult to get a key fob for some car alarms, especially if it is not available in the city, and custom-made price tags start from 2,500 rubles and up to about 4,000-5,000 rubles at a standard price, and the new key fob will still be of little quality and not original, just sewn under the needs of this order.

Let's go back to our instance. In this keychain from StarLine, they ditched the button, completely crushing it to such an extent that all the insides were crumpled.

I took a new button from the DVR board (in the photo above), which I soldered out carefully using a special flux and solder, and there was also a difficulty in the fact that the output of button 4 is the attachment points, this is the plate itself, two points, and two outputs of the button, so that soldering with a soldering iron even with a thin tip is still a mission.

We put the button in place of the dismantled one, rinse it with a degreaser. We also clean the jumper jumpers between the two boards, the main one and the transmitter - they often oxidize in moisture conditions, everything must be dried after cleaning, and then you can collect and turn on the alarm.

Checking such a key fob can be performed both visually - pressing a button is visible by the reaction on the display and by sound, and with the help of a simple HF detector that will catch the signal transmission from the key fob.