The alarm does not respond to the keychain - how to troubleshoot? Repair of car alarms

Car owners often face a situation where the alarm does not respond to the key chain. As a result, it is necessary to open the car with a key, which leads to the activation of the siren and not to the most pleasant impressions. What to do when the alarm does not respond to the key chain and how can you eliminate the causes that lead to the failure of the work?

Causes of failure of signaling

Reasons for which the alarm does not respond to the key chain, can be very different. Most of them can easily be eliminated without resorting to car services or to masters who install security systems. Repair car key fobs - a simple procedure that can fulfill any motorist.

Battered batteries in the key chain

If the car does not respond to the alarm keychain, then it is likely that the batteries have become trapped or moved from their seats. Gradual reduction of the battery charge is often accompanied by a tarnish of the LED and the screen.

Correct the situation can be a trivial replacement of the battery. For this, the body of the key fob is opened, which is then gently taped on the hard surface. The battery must fall out of the socket. After the new battery in the alarm key is inserted, the system will start responding to the keystrokes.

The car got into the radio interference zone

Often, such zones are located in close proximity to closed facilities, airports and business enterprises. The source of interference can be an electromagnetic field, a large congestion of transport or collector cars, because of which it is not worth stopping next to them.

Check, for this reason whether the alarm does not respond to the key chain, you can bring the device close to the receiver and press the appropriate key. If such measures are useless, then the car must be driven away for several hundred meters and repeat the procedure with the key fob.

Insufficient voltage for system triggering

The working voltage of a discharged battery to turn on the alarm system is not enough. In addition, the alarm goes off and does not respond to the key chain if there are severe frosts on the street.

Many transmitters do not work if they are outside the coverage area of the signal and on and the buttons are repeatedly pressed. This often happens when the key ring is in the pocket of trousers or with it play the young children.

Wear of alarm system

The range of activation of alarms, which are operated for a long time, may decrease with time. One of the reasons for this may be the failure of the receiving antenna of the transmitter signal, which is fixed in the car. There is a possibility that mistakes were made during the installation of the system, which led to such consequences.

The key fob does not synchronize with the car

In such cases, the transmitter can not communicate with the system, accordingly, the alarm does not respond to the key chain. What to do in this situation? Go to the masters who can reflash the alarm unit. To do this, you have to disconnect the entire system in an emergency manner. Repair of the keyfobs of the car alarm by the reprogramming method can be done on their own - as a rule, the entire process is described in the user manual for the system and is a simple algorithm that is executed by pressing a certain sequence of keys.

What if the alarm stops responding to the transmitter's signals?

To carry out an independent repair of the car alarm system or remote control from it can by no means every car owner. For those who are unsure of their abilities, there are several methods for bringing the non-working system to life.

1. Emergency shutdown option. Any security car system can be forcibly disabled using a special code. It comes complete with a signal and is installed during its installation. To enter a digital combination, you need to use the Valet button - it is located next to the car's steering wheel, on the center console or near the unit. The code can represent both a sequential chain of keystrokes of the key fob, and any other combination.
2. Increasing the efficiency of the system shutdown signal. The method is banal, but effective: the car opens and the alarm stick is brought almost right to the unit. The button on the transmitter is pressed several times at a fast pace - this is usually enough to turn off the alarm system.

What to do if the "Starline" alarm does not respond to the key chain

Cope with the problems of car alarm Starline will help simple actions, which, despite its primitiveness, are very effective. One of them is the replacement of the battery in the key fob. For the full-fledged operation of the transmitter it is necessary to use only high-quality batteries that can work for a long time. Chinese batteries for the car alarm keychain are better not to use - they are quickly discharged and the system is rendered unusable.

Important is the place of purchase of the battery. To buy batteries in severe frosts in the street is not worth it - after they get warm, their service life will be reduced by a factor of times, and the likelihood that the discharge will occur immediately after installation. In addition, it is necessary to have a spare set of batteries with you in case the console stops working.

If the installation of a new battery does not give the desired results, and the "Starline" alarm does not respond to the key chain, it is worth paying attention to other factors. One of the reasons for the failure of the system may be the hang of the transmitter, which is typical for the following situations:

• The car is parked near a power line or a high-power radio station.
• For some reason, the battery is exhausted.
• Keys of the key fob have been pressed several times outside the coverage area of the alarm system.

The last case is solved quite simply - just drive the car away for several hundred meters and check the operation of the remote control.

Other reasons for failure of the key fob

If the above actions do not have the desired effect, then all further measures involve carrying out repairs using a soldering iron, a multimeter and an oscilloscope.

• The case of the key fob opens and its contents are carefully viewed for the presence of microcracks and traces of low-quality soldering.
• Various impurities, wool, dust, mote are removed with a soft brush. Wipe the chips with alcohol or other solvent can not be - this can lead to the destruction of capacitors.
• Leaving contacts and details are neatly soldered into place.
• Voltage of conductors and other elements is checked by a multimeter. And also it is desirable to test the operation of the LED and buttons.

The meter also checks the energy consumption of the battery when the key is pressed - its value should not exceed 10% of the total battery charge.

During the analysis of the keyfob, it is desirable to check it for triggering and for the response of the system to pressing the buttons. In the absence of any connection, it is worth checking the trimmer capacitor - there is a high probability that the reason lies in it.

Using a dielectric screwdriver, the capacitor rotates with the key pressed and the programming mode turned on by 10 degrees. If the system was not synchronized, the action is repeated.

Conduct all the above procedure is desirable only if there is at least a minimum of knowledge in the electrician. Otherwise, the probability of complete failure of the car alarm system and the need for repair work is high.

The lack of response of the alarm system to the keyfob commands is not the worst damage. You can eliminate it yourself, the main thing is to correctly determine the cause of the malfunction.