Methods for disabling the VAZ-2115 immobilizer
If you don’t have the skills to reprogram a security system, but don’t want to make charitable investments in favor of car services, that’s okay. The solution to the potential problem is quite simple: you can disable the standard immobilizer yourself. It is worth considering that this is recommended only in cases where your VAZ-2115 already has an alternative anti-theft system installed, otherwise you will simply give the green light to attackers.
So, in order to deactivate APS-4 without self-flashing and provide unhindered access to the engine, you need to do two things: completely dismantle the immobilizer itself and erase the security coding data from the memory of the car’s electronic control unit. This procedure must be carried out carefully: there is a risk that the system will regard this intervention as an attempt to steal a car and block further access.
First you need to find your immobilizer unit itself, dismantle it and disconnect the wired signal connector (block). By default, the VAZ-2115 has it in the center console, so there should be no problems with detection. Remember that if your console device differs from the standard one, it is better to refer to the instructions, with the help of which you can find answers to all your questions.
Then you should find the ninth and eighteenth contacts on the removed connector (there are twenty of them in total; if there are no factory markings, the counting is from left to right, starting from the top row). Carefully cut off the wires at the indicated contacts, leaving “tails” from the connector approximately 4-5 cm long from the block itself. The cut wires must be thoroughly cleaned, twisted together and insulated with conventional winding. Thus, you will completely restore the communication line between the electronic control unit and the diagnostic block, bypassing the immobilizer. After this, install the connector, returning it to its original position.
This method is fast, simple and convenient, but, unfortunately, it cannot absolutely guarantee that you will disable the built-in factory protection system. If this procedure does not help, intervention in the electronic system will be required - flashing, which is still better to entrust to specialists, since careless actions can block not only the engine, but also the entire control system as a whole. Take care of the safety of your car in advance - and it will serve you as long as you want.
VEHICLE ANTI-THEFT SYSTEM (APS)
The car is equipped with an APS-4 car anti-theft system (immobilizer), consisting of a control unit, a system status indicator and code keys.
The immobilizer is an electronic unit that prevents unauthorized engine starting, opening the necessary electrical circuits and works in conjunction with the electronic engine control system.
The immobilizer goes into security mode automatically when the ignition is turned off.
Checking the activity of the anti-theft system
First of all, make sure that the anti-theft system is connected and inactive. To do this, close all the car doors except the driver's door, get into the car and close the driver's door. The interior lamp should continue to light after closing the driver's door for another 12 seconds, and then go out smoothly. Turn on the ignition, the system status indicator LED should light up and stay lit while the ignition is on. In this case, you can proceed to the procedure for transferring the anti-theft system to the active state, i.e. carry out the so-called “training” of the system with code keys, which then become individual for each anti-theft system.
If, when the ignition is turned on, the system status indicator LED blinks at a frequency of 2 times per second, this means that the anti-theft system of your car has already been switched to an active state.
Disarming the immobilizer
To disarm the anti-theft system and start the engine, do the following.
1. Open and close the driver's door or turn on the ignition. In this case, the system goes into the “reading” mode of the key code, and the system status indicator LED on the instrument panel begins to blink at a frequency of 2 times per second. If the transition to the “reading” mode is carried out by turning on the ignition, the buzzer will emit a short sound signal.
2. In the “reading” mode, which lasts 1.5 minutes if the door was manipulated, or 10 seconds if the ignition was turned on, you should bring “your” working key to the indicator. After the system reads and recognizes the key code, the LED goes out and the buzzer emits a double beep. When the LED turns off, the engine can be started.
3. Turn on the ignition, the LED will light up briefly and go out, the engine should start.
The anti-theft system switches to security mode automatically after turning off the ignition and depends on the situation and the actions of the driver. If the driver’s door did not open or was open and not closed, then arming occurs after 5 minutes; If the driver's door was opened and closed, then arming occurs 30 seconds from the moment the door is closed.
