Car alarms today are installed on almost every car. In this case, during operation, for various reasons, it may be necessary to turn off the alarm. For example, disabling the alarm may be necessary if the driver leaves the car in a parking lot, closed garage or guarded parking lot for a long time.
Also, the alarm on a car often needs to be deactivated if there are malfunctions or malfunctions in its operation, repair work is being carried out, etc. One way or another, not all drivers know how to completely turn off the car alarm. Let's figure it out.
Possible causes of failure
There are several reasons why a car alarm may break down or not work:
- Radio interference. The reason is especially pressing for large cities, in which many radio towers, mobile communication stations have been erected, and a huge amount of various electronics are concentrated, preventing the high-quality passage of the signal, including the signal from the security system key fob. To fix the problem, you can try to bring the key fob closer to the central control unit or to the receiver with an antenna, deactivating the siren.
- Failure of the control panel (key fob). This can happen after a strong impact (for example, on the ground when falling). Careless handling and prolonged use most often lead to failure of the door closing and opening buttons. In this case, it is necessary to repair or replace the remote control and register it in the memory of the anti-theft system. If water gets inside, oxidation of the contacts may occur. Current stops passing through them, the buttons do not respond to pressing. It is necessary to disassemble the key and carefully check the conductive elements. A common cause of this problem is low battery. It needs to be replaced with a new one. If the standard remote control is equipped with one-way communication, you can check the battery charge by pressing the button. Doesn't the warning light come on? The battery needs to be replaced. In case of two-way communication, a charging indicator is visible on the display.
- Battery low. The problem can occur even while the vehicle is moving. You can determine it by turning on the ignition. If there are no indicator lights on the dashboard, the car's battery is discharged. The door can be opened with a key after first disconnecting the “negative” terminal on the battery. To turn off the alarm and start the engine, you can try to “smoke” the car from another car.
To reactivate the system, you need to perform a number of steps. Most often, press the door open and close button 6 times.
Advice: to avoid mistakes when trying to reactivate the anti-theft system in a car after it has been disabled, carefully read the instructions.
Dismantling Guide
It is necessary to remove the old alarm from the car when installing a new one. Removing the main car alarm unit may be necessary when updating the software or updating its settings so that it meets the security requirements of modern security systems. Sometimes it is necessary to dismantle parts of the anti-theft system for repair and replacement (video author - SpetsAvtoSystems).
Modern security systems reliably protect cars from theft and entry; they have an increased degree of protection against code reading and interception.
You can install a new one instead of the old one, and the installation can be performed on a car of any brand. But before installing a new security system, you need to remove the old one. If you are changing the alarm system, then find a diagram for the old alarm system and connect the new one to the same places, this will make your work much easier.
Tools and materials
It is difficult to dismantle the alarm system, since its elements are hidden as far as possible so that they are invisible. Many owners do not know where the car alarm is installed, so it is better to entrust the dismantling to specialists.
How to turn off the alarm without a key fob
To turn off the anti-theft alarm on a car without a key fob, you can use one of 2 methods: emergency shutdown or coding.
Emergency shutdown
Emergency deactivation of a car alarm is carried out using the Valet button - an emergency alarm deactivation button. Most often it is placed:
- next to the safety block;
- under the dashboard.
Sometimes:
- in the area of the pedal assembly;
- behind the glove box;
- under the steering column.
You can find out exactly where the emergency button is located by reading the user manual. It also contains information about the combination required to turn it off, consisting of simultaneous pressing of buttons and pedals (one or both).
Hint: when looking for an emergency button to turn off the alarm in a car, pay attention to the location of the anti-theft LED indicator. If it is located in front and to the left, then you should look for the button somewhere nearby. Likewise - if in the middle or on the right.
It is advisable to first disconnect the terminal from the battery to turn off the sound signal. If you make several unsuccessful shutdown attempts, the car alarm may automatically lock.
Important! For emergency shutdown, hold down the car alarm button and press the pedal for at least 10 seconds.
Coded shutdown
With a coded shutdown, the standard alarm is blocked using a PIN code containing from 2 to 4 digits. It is known only to the owner of the car.
The procedure is carried out as follows:
- turn on the engine ignition system;
- press the valet service key a number of times similar to the first digit of the PIN code;
- turn off the engine ignition system;
- repeat the procedure for the second and subsequent digits of the PIN code.
If the process is carried out correctly, the anti-theft system will be unlocked.
Linking a new key fob
Every motorist can restore normal operation of the security system in the event of loss of the alarm key fob. The new control element must be linked to the old security system. This process is described in the instructions, it may differ depending on the type of alarm. The general points are as follows:
- the system is switched to “valet mode” mode by pressing the corresponding button or lever in the car interior;
- switching to the mode may require entering a security code, which is additional protection (the code is displayed in the instructions);
- An important point is the number of key fobs that can be connected to the system; if you connect an extra one, the code will be erased from the first one.
If you take these points into account and strictly follow the instructions for linking a new key fob, then everything will work out, since anyone can replace a car alarm key fob. There are no difficulties in this process.
Do not rush to change the alarm system if problems arise with its key fob. Solving the problem can be much easier and cheaper. Of course, if the system is old and key fobs are no longer available for it, then it will be easier to install a new alarm system.
The best prices and conditions for the purchase of new cars
What to do if the engine does not start after turning off
If, after disabling the anti-theft device, the engine refuses to start, then, if you have certain skills, you can disconnect the housing yourself. For this purpose, the latches and screws are removed from it.
Attention! The latches and screws must be removed extremely carefully; opening the body of the anti-theft device must be done very carefully so that any fastening element does not break.
If the motor is blocked by a program, it is better not to try to fix the situation yourself, but to seek help from professionals.
Is it possible to transfer an old alarm from one car to another?
If the dismantled alarm was in working order, and the work on its removal was carried out carefully, without damaging the elements, then it can be reinstalled on another car. Even if the electrical wiring has been damaged, it can be easily restored.
Moreover, you yourself can purchase a used car alarm to install in your car. This can save you a fair amount of money. However, you should carefully check the condition of the system elements. If you do not trust the seller, then you should refrain from purchasing. The fact is that until you install the system, you will not be able to assess its serviceability. And once again installing and removing the alarm takes a lot of time and effort.
In what cases is it necessary to disable the immobilizer?
There are a number of cases when there is a need to turn off this device:
- If it is defective from the factory and because of this the machine does not work properly. As a rule, this occurs on the very first car models.
- If the computer battery is completely discharged and prevents the engine from starting.
- If the ECU has blocked it.
- It also happens that the system is worn out and requires replacement.
As we can see, there are different reasons for disabling the immobilizer. It should be understood that this procedure is very serious and quite complex. You need to know all the subtleties.
Simply unplugging the connector can completely shut down the entire engine starting system.
The trained key is lost. What to do
If the trained key is lost, it is necessary to re-train the remaining key. This is necessary to prevent an attacker from using the found trained key. The procedure for learning the remaining key (or a purchased new one) is carried out according to the same scheme, with the only difference being that the LED indicator at the beginning of the learning process does not light up constantly, but blinks at a frequency of 2 times per second.
Chip key VAZ 2110
If the training key with the red mark is lost, you will have to change the immobilizer-electronic engine control unit pair and retrain the purchased keys. Training a clean immobilizer and keys is carried out in the manner described above. Using the same scheme, a failed immobilizer is replaced, having a red training key and two black working keys available.
Immobilizer functions on the VAZ-2114
Disabling the immobilizer on the Lada Priora
VAZ-2114 automakers consider it their duty to install an anti-theft system, called a standard immobilizer, on every vehicle they produce. This device communicates with the engine (with its injection controller) using certain programs. Thanks to the program, an enabling signal is sent to the controller, which does not independently initiate the engine start. That is, the program of the built-in anti-theft device blocks the start of the engine.
The mechanism of operation of the immobilizer is to break the connection of the vehicle's electrical circuit in one of the significant places. This location may be the ignition or starter electrical circuit. Due to the rupture, the car will not start and will remain stationary. The calculation is that if a thief wants to steal a car, it will be protected by an immobilizer program that will prevent the engine from starting.
So that the owner of the VAZ-2114 can control the standard anti-theft system, electronic code keys are attached to it. According to the instructions, the car driver must use the electronic code key in the following way:
- insert it into a special socket (for a contact type of device) or bring it to the system status indicator - ISS (for a contactless type of device);
- The immobilizer system reads the key program code;
- The vehicle lock will be disabled.
They differ in standard colors:
- worker – black;
- educational - red.
Initially, you should carry out a training procedure for the anti-theft system so that the immobilizer is triggered by a working key, since the new car is in an inactive state. It can only be activated using the red “learning” key. As soon as this happens, the functions of enabling and disabling the anti-theft device will transfer to the working “black” key. Thus, a standard immobilizer is intended to protect the vehicle from unauthorized engine starting. The offender, even after climbing into the car, may try to start its engine. But he won’t be able to go anywhere because the immobilizer system in the VAZ-2114 will block the engine.
Why do you have to disable the immobilizer?
VAZ began to equip immo only with injection-type cars. The first anti-theft devices of this series appeared on the VAZ 2110 and they were called APS-4. Today, more modern APS-6 models are more common. Now all cars of the 2110 to 2115 series are equipped with this particular device.
The most common problem with this device is the loss of the key or if the car owner, without knowing it, erased its code. Speaking specifically about VAZ standard immos, you can more often encounter a problem related to the fact that the lights in the cabin do not go out and, as a result, the alarm does not go off. In addition, malfunctions of the immobilizer software often occur, as a result of which its central unit does not read information about the key or considers it “not native”. As a result, when you stop to refuel, you risk being left in a stalled car.
To reprogram (marry, bypass, flash, upgrade, adapt) a device, you must first turn it off. In addition, immobilizers are usually disabled when installing a car alarm.
How do immobilizers work on VAZ 2110, 2112, 2111 cars?
The main features of all immobilizers are the same, but additional features differ from each other. Since we are talking about a standard VAZ 2110 immobilizer, it has the following capabilities and functions:
- when attempting to steal, it creates electrical interference that prevents the engine from performing its job properly;
- blocks all movement systems automatically and completely;
- can connect to the hood lock, control the closing or unlocking of door locks;
- There is a possibility of emergency shutdown of the system and its setting to service mode.
The standard immobilizer does not allow the VAZ owner to connect additional locking relays or use many keys to control the system.
Security is disabled only if the owner of the vehicle opens the car and has the immobilizer key with him. The system instantly recognizes this key and gives a command to terminate the security mode. The immobilizer and its key are a single system, but they work separately, which is very convenient.
The danger of incorrect actions
If the driver makes mistakes while removing the car alarm, the following problems may arise:
- Damage to cables. Faulty electrical circuits will have to be completely replaced. In case of minor damage, part of the wiring is repaired. If the insulation is broken, the cables are wrapped with electrical tape.
- Malfunctions of electronic devices. The method for solving the problem depends on the type of breakdown. In case of minor faults, damaged terminals and cables are replaced. If an electrical appliance fails, the device may need to be replaced.
- Damage to the decorative trim of the car.
- Problems with the engine. Occurs when the power device lock is dismantled incorrectly. In this case, the removal procedure is repeated, correcting the mistakes made.
- Damage to the head unit. In this case, the alarm becomes unsuitable for further use. Soldering the damaged areas and reflashing the module helps solve the problem.
Improper removal of the alarm may result in incorrect battery operation. The battery begins to discharge quickly, which is why it has to be replaced.
Source
Immobilizer VAZ-2110: safety requires sacrifices
It doesn't work without sacrifices. VAZ standard immobilizers have been bringing their owners more hassle than benefit for almost 20 years.
Frequent groundless failures , refusals to start, incompatibility with other security systems, unreliability of the elementary base and jambs during assembly force us to disable the standard immobilizer by any means. But first, let’s briefly look at the principle of operation of the device in order to understand how to deal with it.
Principle of operation
The principle of operation of the immobilizer. The operating principle of any simple immobilizer is ridiculously simple - the device communicates with the engine control unit and gives a certain signal when unauthorized access is attempted . The ECU, in turn, gives or does not give permission to start the engine. It happens like this - to start the engine, it is necessary for the immobilizer to accept the key and only after successful initialization it sends an enabling signal to the ECU. Even in the case when the key fully fits the lock, but is not initialized by the immobilizer, the latter will send a prohibiting signal to the ECU, and the unit will turn off the fuel pump and ignition system. Consequently, starting the engine will be impossible.
