For the first time, the option to control the central locking from a button on the instrument panel was implemented in a luxury vehicle (GLS) in March 2014, but from October 2021, the central locking control scheme was changed in accordance with the description in this section. We tell you how the standard central lock on a Chevrolet Niva works and how to install it yourself.
The central locking of this vehicle is controlled by:
- A latch in the driver's door, which is the factory design of the central locking system on a standard Chevrolet Niva car; however, a feature of the luxury configuration is that in this version the central locking is controlled by a latch only when the ignition is turned off.
- A button on the instrument panel when the ignition is on, which is also a feature of this car.
- Key fob installed security alarm, but this option will not be considered in this section.
When the car's ignition is turned on, control of the central locking switches from the latch to a button located on the dashboard, which is used both to close all the car's locks and to open them when pressed again.
The button does not directly control the servos of the latch in the car doors - it controls the car's central locking via the standard BUDM. 30 seconds after turning off the ignition, control of the central locking returns to the driver's door latch, and all the car's locks are adjusted to the position of the latch.
In addition to the standard illumination of the button when the dimensions are turned on, it also features illumination of the central locking status based on the position of the driver's door latch: orange means that the car's locks must be closed.
Causes of central locking malfunctions
Most often, the electrical part of the solenoids control fails , and the locks themselves are considered relatively reliable.
The central locking of a Chevy Niva car works on the following principle: the signal for opening or closing the doors is transmitted by pressing a button on the key or turning the cylinder in the driver's door, while the signal passes through the central locking control unit and the on-board computer.
This scheme has its weaknesses, and the main reasons for failure are the following factors::
- short circuit in the circuit and fuse failure;
- chafing of wiring in flexible corrugation, loss of contact at joints due to vibrations and moisture ingress;
- central locking relay malfunction;
- error in the central locking control unit;
- lock motor failure.
Advice! If the car has an alarm system, the central locking may not open due to a malfunction of the alarm system. Perhaps the reason lies in the dead battery of the alarm control panel.
Connecting the signaling to the Shnivy central locking system
Some versions of the Niva-Chevrolet are equipped with central locking. If there really is a standard central locking system, it is controlled by a single module. It should be noted that this same module acts as a standard signaling device. It turns out that an alarm system with central locking is installed in the Shniva from the factory, but you can always connect an additional alarm to it, that is, to the standard module. One of the options for such a connection is discussed further.
We combine two different alarms
So, let's say that one alarm system in the Niva-Chevrolet is already installed (from the factory). This means that we will use the wires connected to its module initially. There are limit switch taps and ground, as well as central locking control wires.
The lock is controlled by two wires - yellow-blue and blue. In addition, you will need to find another cord that powers the passenger door actuators.
The cable we are talking about is a power cable and is usually covered with yellow insulation.
Additional alarm connection diagram
To control all locks, and not just the driver’s actuator, you need to implement the following connection option:
Let's list the features of this option:
- The relay contacts built into the main unit are connected to the breaks in the signal wires (see figure);
- The normally open contact of the locking relay is left free. In “Shnivy”, closure occurs when the cord is “in the air”;
- The duration of the control pulse is set to “0.8 seconds”;
- The control output is programmed to be activated during unlocking. This output controls another, third relay.
Let's talk about why an additional relay is needed here. If we remove it, we will see that the passenger locks cannot be opened from the key fob. In principle, this option is also acceptable: except for remote unlocking of three doors, everything will work.
The 15 Amp fuse shown in the diagram is in series with the cable leading to the actuators.
Connecting without using a fuse is strictly prohibited. At the same time, it is not necessary to protect the relay windings with a pre-flask. The same applies to the signal wires, that is, to the normally open contact of the unlocking relay. In principle, fuses can be added to all three circuits. And also, the winding of the “lower” relay can be powered from the 87th contact.
Practical implementation of the scheme
Surely the reader knows where the fuse box is installed in the Niva-Chevrolet. This block must be dismantled by unscrewing one screw from the top.
A plastic box will be secured under the indicated block. She is exactly what we need.
There are three “important” cords on the connector of the module shown here: blue, blue-yellow, yellow. Taps from the three break points are extended to the installed signaling, as well as to an additional relay (see diagram). Particular attention should be paid to the connections of power wires.
You can make an additional relay module yourself. A current not exceeding 8 Amperes will flow through the contacts here, so there will be no difficulties:
The diode shown in the main diagram can be anything (its characteristics are not so important). The main thing is that it is there, otherwise you can burn out the control output to which the switched winding is connected.
Remember the main thing: you can carry out any installation work only when the negative terminal is disconnected from the battery.
It is better to connect power cables by twisting, but knowing how to do it correctly is an entire art. All connection points must be isolated. But this will not be enough: in places where the metal touches, the cord is protected with heat-resistant insulation. This is how you can protect yourself from unforeseen consequences.
Features of programming the new signaling
Let's say the scheme discussed above was implemented without errors. At the second step, as you might guess, you need to correctly program the alarm. Otherwise, there is a possibility of burning out the actuators installed in the passenger doors. The advice is simple: you cannot make a control pulse longer than one second. However, the default value is 0.7 or 0.8.
The signal output used must also be programmed correctly (it must be activated at the moment of unlocking). An alternative method is to use the 2-step unlock output. The pulse duration on it must be set within 0.7-0.8 s. The default value is 30 s, and guess what this means in this case.
Niva Chevrolet and Starline A91
Operating principle and central locking diagram
Central locking has been installed on the VAZ 2123 since 2004 . Since then, the Chevy Niva central locking scheme has not changed fundamentally and is installed on cars starting with the “Norma” configuration. To control the remote door opening, a remote control (remote control with a flip key) is used. It combines the functions of an immobilizer, ignition key, and door key. The signal from the remote control is received by the electrical package control unit (1118-6512010), which is responsible for opening the doors.
Causes of fuse failure
Each element is designed for a specific current. Its meaning is written on the case, but for convenience, the colors of the case correspond to certain values.
- Brown – 7.5 A
- Red – 10 A;
- Blue – 15 A
- Yellow – 20 A;
- White – 25 A.
If the permissible current value is exceeded, the fuse blows and the circuit opens. In this way, consumer failure is prevented. The reason for the increase in current strength may be an increase in the circuit load or a short circuit. In this case, the total resistance of the circuit decreases, and the current increases.
Ways to solve problems with central locking Niva Chevrolet
Before starting work, it is recommended to evaluate your repair skills and experience with electrical wiring in a car. Special equipment may be required, and at a minimum, a tester is required to diagnose electrical circuits. Troubleshooting always starts from simple to complex.
Fuse failure
The fuse is the first thing every car enthusiast should check if the central locking stops working . The symptom will be the failure of all doors to close with the button at the same time. It's easy to check - just open the mounting block and replace it with a serviceable one of the same rating.
Most often, the cause of its burnout is a short circuit or overload in the circuit . In the mounting block of cars manufactured before 2009, it is designated F6; on cars after 2010, it is located under the number F10.
Cigarette lighter fuse
If the cigarette lighter does not work, then the first thing you should check is the socket itself for the presence of foreign objects and the integrity of the fusible link, which opens the circuit if the reverse mechanism of the cigarette lighter spiral does not work.
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Next, check the fuse on the unit itself. On the diagrams it is marked as number 6 (F6).
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If this does not help, then the question remains with the electrical wiring itself.
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In this video you can clearly see an example of how to get to the fuse box and replace them.
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You should also check the supply voltage to the connectors with the electric motor wires, as breaks occur in these circuits. To determine the lack of contact, you need to ring each wire with a multimeter. The drive motor is checked with a measuring device; to do this, it is necessary to measure the resistance of its windings.
Niva Chevrolet repair manual. Diagram of the door lock system: 1 – mounting block; 2 –…
If clicks are not heard, check that there is power at the switches. Conclusions Determining the causes of a central locking malfunction is quite simple.
The rest of the peeps act on their own, each opening its own door. Sometimes installing an alarm yourself can lead to blocking failure, so you should entrust this work to specialists.
Depending on the method of switching on the relay, the polarity of the voltage changes, ensuring a corresponding change in the position of the lock latch.
Some models may be equipped with an anti-theft system built into the central locking system. If you are unable to independently determine the cause of the failure by performing a series of general checks, contact your Chrysler dealer for advice.
With the engine off, switch the door lock switches in both directions Open - Closed. The relay should make clearly audible clicks.
Door lock relay location. There are a lot of different things to do, it’s cold outside, the toad was choking me to change it at the service station, and somehow I drove like that, locking it with the key. And then last week the door completely stopped working, neither opening nor closing.
When using the original signaling, only the starboard turn signals blinked. I read on the Internet that the electrical package located behind the fuse box burns out.
It cost me quite a budget in rubles. I came across two types of “Norma” in the store and, I took the one I had without the “” at the end, does anyone know what the difference is between them?
I left the store, immediately picked up the block, closed the door with the key, all the locks worked as expected, first they all opened, then they all closed. That is, the block is working and my wiring, as I said, is also all working.
