Why disable the immobilizer on a Chevrolet Niva
If the immobilizer is active, the Chevrolet Niva car engine practically does not start, which is a huge problem for attackers. The vehicle owner may need to disable the immobilizer in the following cases:
- an APS immobilizer or other device of a similar type cannot affect the car if it is started by unauthorized persons;
- the driver suspects that problems arise with the operation of the immobilizer due to a malfunction of one of its parts;
- there is a complete or partial break in the immobilizer wires, which are responsible for the receipt of specific signals;
- a specific model of an APS immobilizer or other security device is completely outdated, and the driver wants to replace it with a more modern version;
- The owner of a Chevrolet Niva wants to install a standard alarm system instead of a security immobilizer.
Whatever the reason for dismantling the immobilizer, before removing it from the car, it is necessary to completely disable it. This process will be a little more complicated than that of a standard security system, but if you study the user instructions in detail, you can cope with this task yourself.
If the car does not start, and the driver does not know how to disable the immobilizer, because the key was lost, and
the code is forgotten, he should seek professional help. To disable the immobilizer, you need to use additional equipment, and not everyone has it at hand. The principle of disabling standard APS immobilizers and more modern devices is based on the same level.
Each immobilizer, which is located on a Chevrolet Niva, has its own operating, connection and disconnection features. In order to neutralize the device you must:
- find all possible ways to solve this problem;
- choose the easiest and most affordable option from a huge number of possible ones;
- try to notice this method in practice;
- If all else fails, seek qualified help.
Most often, an APS immobilizer is installed on a Chevrolet Niva, which ensures that if an attempt is made to steal the car, it will not start at all. They can be easily disabled if the owner has a chip key and has not lost it. It is enough to remove the chip from the key and attach it to the immobilizer antenna so that deactivation occurs quickly and without problems. If there is no key, you can try to use other shutdown methods, but with them the situation is a little more complicated. As a last resort, there are special, professional organizations that will definitely help solve the problem of disabling any immobilizer quickly and efficiently.
Immobilizer on a Chevrolet Niva how it works
Each immobilizer has its own additional functions and capabilities, and if a car of the specified brand has a standard immobilizer, you should count on the following performance indicators:
- blocking vehicle movement systems using one working channel;
- possibility of emergency shutdown of the system and operation in service mode;
- automatic activation and deactivation of the security mode - you can set the timer for turning on the security mode yourself;
- ability to control the hood lock.
More modern, contact and wireless immobilizers can provide drivers with a number of such additional capabilities, not taking into account the above listed basic ones, which absolutely every immobilizer has:
- method of interactive user authorization, authorization using a key in the form of a plastic card and automatic - using a radio tag;
- connecting three to five blocking relays and using additional keys or radio tags;
- ability to work in anti-robbery, “Jack”, Anti-Hi-Jack modes;
- use of modern technologies for communication and very high data transfer speeds;
- the ability to work productively at very low and very high temperatures;
- productive work not only inside the vehicle, but also after installation on the outside.
Immobilizers work when an attacker tries to start the vehicle as follows:
- certain signals are sent to all vehicle movement systems;
- fuel supply stops;
- the intensity of the electric current becomes very low and it becomes almost impossible to start the engine.
Basically, the immobilizer is located in a Chevrolet Niva car behind the radio, and during minor or major malfunctions the lamp lights up. If the immobilizer is working correctly, when it is in active mode, the car does not start at all or immediately after starting the engine it stalls completely.
Location of the immobilizer on the VAZ-2114
Location of the APS-4 immobilizer on the car
Since the beginning of the 2000s, an automobile anti-theft system (APS) has been installed on all injection engines produced in Tolyatti.
The meaning of the system is as follows: an attempt to steal a car will end in nothing. The attacker will not be able to start the engine, and if he does start it, then after driving a few hundred meters the fuel supply will stop and the engine will stall.
The idea is good, but there are a number of problems that arise during its operation:
- Software failure. The electronics does not see the update of information supplied by the ignition key or does not recognize it. There were cases when, having stopped and turned off the engine, it was no longer possible to start it.
- Engine blocking due to low battery. Leaving your car in a parking lot for several days in winter can accidentally activate the system.
- Serious problems when connecting an alarm system with auto start.
- Breakdown, contact closure due to poor location.
In the case when a car with an active immobilizer does not communicate with the computer, you need to know the following: the K-Line wire connects the diagnostic connector and the APS. Only then does the power enter the electronic control unit.
In the event of a malfunction, you need to make sure that the system is connected to the correct connector. If the result is positive, you can try to disconnect it and bridge the 9th and 18th contacts.
In case of malfunctions related to the operation of the immobilizer, it is necessary to take into account the fact that this is a complex electronic device. Therefore, to troubleshoot it, it is recommended to contact a professional auto electrician.
The Bosch ECU on the VAZ-2114 came complete with an APS-4 immoblizer
When deciding whether to deactivate the immobilizer or not, you need to know the following. APS-6 or 4, although it has a number of significant drawbacks, it really counteracts hooligans who may decide to ride in a car parked near the entrance. The alarm does not turn off the engine and fuel system.
The anti-theft system of the 6th series, on the contrary, turns off the power to the fuel injectors (the 4th turns off the fuel pump and glow plugs). Therefore, it’s up to you to decide whether to connect it after the next glitch or not. But at least, if they decide to steal a car, then they will need their own ECU; you can’t take the car with your bare hands.
A few more features of the aps4 immobilizer
Car immobilizer aps4 is a system that works with domestic cars and perfectly protects them from theft for a long period
In addition to the features of the configuration, functionality and appearance of the system, car owners should also pay attention to the following indicators:
- work at temperatures not lower than -40 and not higher than +85 degrees;
- consumer parameters of the immobilizer are in the range of 8-15 V, 5 mA;
- the system is sold to the consumer without a registered key and this will have to be done independently;
- reading the code using a specially installed device can last for ninety seconds or less;
- the user should not register his own key until the immobilizer training is completely completed.
The aps4 immobilizer is not suitable for installation in modern foreign cars.
This system is highly reliable, but requires special attention, because you will need to work hard on the immobilizer learning process. A diagram for installing the immobilizer is attached to the instructions, and thanks to this, each user can install the system independently.
Why is it needed and when is it not needed?
The standard immobilizer for the VAZ 2114 leaves the assembly line untrained. There is no data about master keys in its memory. Therefore, the complete delivery set of the car contains 3 keys: red (training) and two black (working). The owner will have to learn the system, with which the salon employees or the previous owner will help him when selling the car second-hand.
In domestic cars, the immobilizer communicates directly with the car's ECU, which locks or unlocks the system. This is the biggest disease of the entire system, because domestic automatic systems leave much to be desired. Communication between the immobilizer and the ECU can interfere with the connection of diagnostic equipment, signal interference, and even normal interference from a mobile phone.
Another weak point of the device is the battery. If it goes down completely, the K-Line (communication line with the ECU) will be disrupted and the same consequences will occur as with unauthorized access. Regardless of the reasons for decoding the connection between devices, you cannot avoid a trip to the service center on a tow truck.
There were so many unreasonable system failures (especially in cars before 2001) that VAZ designers developed separate software for emergency starting of the car. A machine controller configured in advance for this function will allow a single start followed by a safe trip.
The device does not have external controllers, and therefore the password is entered by pressing the gas pedal. A special algorithm must be followed, which turns this function into a perversion. You can read more about the setting algorithms in the instructions for the immobilizer.
Having assessed the above-described system errors, the VAZ design bureau in 2004 replaced the brand of the serial device with APS-6 (previously APS-4 was installed). They developed new software.
Immobilizer software interface
The most noticeable innovations were: a code key, which moved from the gas pedal to the steering column and door controls (including power windows).
Although the new functionality has become noticeably better than the previous one, failures and “miracle masters” still force car owners of the fourteenth to change the ECU. Sometimes the owner can unintentionally delete the code on his own, after which the question of expensive car repairs will arise. Also, do not forget about some of the tricks that domestic car enthusiasts go to in order to deceive the cunning system.
