Where is the shock sensor on the grant?

Almost all Lada cars have a standard security alarm. In terms of functionality, it is inferior to security systems from Starline, Tomahawk, etc. But if desired, you can expand its capabilities, for example, connect shock, volume, tilt or movement sensors to the standard alarm system.

You will need: buy a sensor (shock or volume) for any alarm system. There are many of them, but the connection method is similar (for the purpose of the sensor contacts, see the instructions included in the kit).

Depending on the configuration, different types of electrical package control units (ECU) can be installed on a Lada car. For example, in the “Norma” configuration of the Kalina/Grant, an APS-6 unit is installed, which is located under the rear left seat. The connection diagram for the 3-pin shock sensor is as follows:

• We connect 1 contact of the shock sensor to 1 contact of the BUE
• 2 contact - to ground (or contact 6 BUE)
• 3 contact - to 12 contact BUE

For a 4-pin sensor, two wires can be combined into one:

If several sensors are used, for example, a shock sensor and a volume sensor, diodes should be used (since only one input is used on the BUE).

On the “luxury” versions of Priora, a different ECU is used, which is located under the panel (next to the ECU). The connection is made to the connectors on the back of the unit (the connection connector was taken from the PC) according to the diagram:

Installation of the sensor It is recommended to attach the shock sensor to the metal of the body and securely fix it.

After arming, the sensor does not start working immediately, but only after 30 seconds. After hitting the body or wheel, the shock sensor will work and the horn will sound.

Have you modified the standard alarm systems of Lada Priora, Kalina or Grant cars in the same way? Let us remind you that it is possible to replace the standard key with a switch key.

A modern car consists of a huge number of complex systems. The SRS Airbag passive safety system is almost the most important in a car, because the health and life of people depends on the quality of its operation in an emergency. If it breaks, the corresponding light on the dashboard lights up. This light usually causes panic among drivers, because it indicates that the airbags for which the design of the accident is intended may not work. Now we will take a closer look at the SRS system, find out what to do if the airbag light comes on, and look at several specific examples of the life of car enthusiasts.

In any modern car we see the SRS marking in the interior. What does this mean? This abbreviation stands for Supplementary Restrain System, which in Russian means “Extended Security System”. Often the phrase Air bag is added to it, which translates as “airbag”. Specifically, pillows are the main attribute of the accounting system. However, apart from them, SRS also means:

1. Seat belts.
2. Tensioning devices.
3. Shock sensors.
4. Squibs.
5. Electrical control system.

Just like any other auto component, the security system can fail if one small part breaks down or another loss of reliable connection between the elements.

When the sensor detects an impact, it transmits an alarm signal to the system and the airbags deploy. From the moment of impact to the deployment of the airbags, 30-35 milliseconds pass. Modern cars have special batteries that operate the system even when the main battery is damaged.

If the airbag light comes on on the dashboard of your car, it means that there is some problem in the system. The indicator can glow constantly or flash at certain intervals, informing the driver of the error code.

Airbag device

An airbag cushion is an elastic base that fills with gas in the event of an accident.

The complex of components also includes a control system and a gas generator. Starch or talc acts as a lubricant for the material, guaranteeing clear opening.

The gas generator's job is to fill the airbag with gas during a collision. Together, the gas generator and the shell form an airbag.

Airbag designs are classified:

1. By the nature of the action - with one and two-stage operation;
2. In shape - in the form of a tube or dome;
3. According to the type of gas formation - hybrid or solid fuel.

A solid fuel generator is based on a fuel charge, a squib and a housing. The airbag is charged with a special composition based on silicon dioxide, potassium nitrate and sodium azide.

The fuel is ignited by the action of the squib, after which gas is formed.

In a hybrid gas generator, the main components are a squib, a housing, a gas and a solid propellant charge.

After a collision, the airbag cushions are filled with compressed gas, releasing a solid propellant charge.

The task of the control system is to combine devices (control unit, shock sensors, squib) and guarantee their precise operation.

How does an airbag deploy in an accident?

The airbag is deployed during a collision with another object or vehicle.

Depending on the location of the impact, the front or side airbags are activated. As soon as the impact force is above the limit level (set by software), the impact sensors send a command to the control unit.

The latter collects information, analyzes it and decides whether to deploy the airbags or not. The described actions occur in a fraction of a second.

Taking into account the analysis of the severity and type of accident, the whole or only part of the system works. Sometimes it is enough to activate only the seat belt tensioners or they work in conjunction with the airbags.

The control unit sends a command to turn on the gas generator of a specific airbag. In this case, the response time is 30-40 ms. During this period, the gas generator guarantees the expansion and filling of the pillow with gas.

As soon as the airbag touches the human body, it ruptures and deflates.

The front airbags are activated when a number of conditions are met:

• Car fire;
• Increasing the specified impact force in a frontal collision;
• Vehicle crash;
• A sharp collision with the wall of a hole, a curb or the edge of a sidewalk;
• Impact to the end of the car (oblique frontal collision);
• A hard fall on the wheels after a “jump”.

It is worth knowing that the front airbags do not deploy in the following cases - when the car rolls over, a side impact or contact from the rear.

It is built into the car program that before opening the airbag, the speed of deceleration of the car and movement at the moment of collision, the presence of connected seat belts, and so on are analyzed.

For more information on this topic, see here https://autotopik.ru/obuchenie/503-kak-rabotaet-podushka-bezopasnosti.html.

Checking the airbags

Immediately after purchasing a used car, the new owner of the iron horse must make sure not only of the functionality of his purchase, but also check the airbags. First of all, you should make sure that they are generally intended for a given car model. This will be indicated by the corresponding SRS or Airbag inscriptions on the steering wheel and dashboard. There should be no chips or scratches around these abbreviations, as this means that the protective accessory has already been used and it is not a fact that the previous owner took care of the expensive service of filling the air bags with gas. However, even if the product was reinstalled, there is no guarantee that the procedure was completed correctly.

Healthy! The shelf life of pillows is usually from 10 to 14 years (depending on the model, brand and year of manufacture of the car). After this period, the cartridge is discharged and the product becomes unusable.

It is also worth paying attention to the glass (especially the windshield). If they have changed, then most likely the airbag has already been used.

It is worth paying attention to the date of manufacture of seat belts. The data must be the same on all seats. If these elements were replaced, then a possible reason is a strong blow, which also provoked the opening of the airbag.

In addition, there are several more ways to check the presence and functionality of pillows:

• Turn on the ignition and wait for the “airbag” sign to appear on the dashboard, which should disappear after a few seconds.
• If the car has a special connector for diagnosing the operation of systems (usually located under the steering wheel), then you need to start the engine, wait 30 seconds and close contacts 4 and 13 using a regular paper clip. After this, the buttons on the dashboard should start blinking. If one of them displays a person with a pillow, and this button blinks more often than others, then this indicates an error in the received code. If the light bulb shows no signs of life at all, this indicates that the car seller has completely turned off this module.

What to do if the airbag deploys?

Car enthusiasts are often lost and don’t know what to do when opening an airbag. On many cars (Lada Granta and Priora, Ford Focus 2, Lada Priora, Opel Astra and others), you will have to perform the following manipulations:

• Install new airbags, replacing those that have already deployed;
• Correct the “brains” of the control system, that is, the unit that is responsible for the SRS. Instead of the error, a dump of the new machine is installed (as if there was no accident);
• Install a special snag (plug).

The problem is that each manufacturer has classified information, which forces car enthusiasts to buy a new control unit for the airbag. In addition, airbags are often tied to the VIN number or model of the vehicle.

If you go to a service station, the cost of restoration work will hit your wallet.

Experienced car enthusiasts copy a security system dump and write it to a remote memory device.

Data is stored until sold. If the car is involved in an accident, it is easier for a specialist to restore the system.

In this situation, a microcircuit and a programmer are purchased, after which the device is flashed. The average cost for such work is from 5-7 thousand rubles.

Removing the driver's airbag

We carry out the work when replacing the airbag and when removing the steering wheel.
Before removing the airbag, disconnect the wire terminal from the negative terminal of the battery. After this, you must wait at least 10 minutes for the airbag activator capacitor to discharge. The airbag is mounted on the steering wheel...

...two plastic hooks 1 and two plastic clips 2.

The cushion hooks engage with two spring clips 1, and the cushion clips fit into recesses 2 on the steering wheel (for clarity, shown with the cushion removed). We set the steering wheel to the straight-line position of the car and, by removing the key from the ignition switch, fix this position.

Use a thin screwdriver or other suitable tool to pierce the hole marked on the steering wheel. We similarly pierce a hole on the other side of the steering wheel. Through the holes with two screwdrivers...

…we press the spring clamps (for clarity, shown with the airbag removed)… …and, by pulling the airbag towards you, we disengage the hooks of the airbag from the latches on the steering wheel. We pull the pillow towards ourselves and, overcoming the resistance of the plastic clamps of the pillow, remove them from the recesses of the steering wheel.

Move the airbag away from the steering wheel...

...and disconnect the ends of the two wires from the terminals of the horn switch.

Using a screwdriver, we pull the lock out of the wire block...

...disconnect the block from the airbag connector...

...and remove the airbag. The removed airbag should be stored in a place protected from moisture and excessive heat, with its cover facing up.

Do not disassemble or repair the airbag yourself. Having connected the block of wires to the airbag connector, insert the clamp into the block. We connect the wire lugs to the terminals of the signal switch. We install the cushion on the steering wheel so that the cushion clamps fit into the recesses of the steering wheel, and the hooks of the cushion fit into the corresponding holes in the steering wheel. Press the cushion until the hooks of the cushion snap into place with the steering wheel latches.

Accident statistics show that an airbag reduces the death rate by an average of a third. There are cases when a serious collision ended in a slight injury due to the opening of the airbag. But what to do after the airbag deploys on an Opel Astra, Lada Granta or Priora, as well as on other cars? How to fix the error?

Is it possible to drive without airbags?

Car enthusiasts often ask questions regarding the operation of the car if there are faulty (opened) airbags or a malfunction indicator has been activated.

If the icon lights up, it indicates that one of the sensors has failed. This means that the likelihood of the airbag not deploying in an accident is higher. The indicator also lights up when the device has already been activated and a “plug” is installed instead.

You are allowed to drive with such errors (the technical part of the car does not suffer). Another thing is that the level of security is falling. There remains a risk that the airbag will not fulfill its intended purpose.

What to do with worn seat belts?

The seat belt squib often deploys along with the airbag. There are two options here - turn to specialists or do the work yourself.

In the second case, the sequence is as follows:

• Move the front seat forward as far as possible;
• Unscrew the blind edge of the belt from the body part;
• Disassemble the lower edge of the rack trim (the mechanism is located there);
• Pick out the plug on the adjustment mechanism;
• Remove the rack trim to check the level of wear;
• Carefully unscrew the belt and push it away from the adjuster;
• Remove the device and discard the system connectors;
• Remove the cover and locking assembly;
• Under the steel plate there is a mechanism with a return spring. The latter, when the squib operates, is triggered, jumps out of its place and fixes the belt;
• Compress the springs and put everything back in place.

Where is the Airbag Sensor on the Grant?

30 Aug
Removing the airbag control unit (SRS unit) Lada Grant VAZ 2190

tools:

Parts and consumables:

• Oil filter
• Machine oil
• rags

Tool:

• Nozzle nozzle 10 mm
• Collar under end cap
• Wrench

Parts and consumables:

• Airbag control unit (BUSSNB)

1. Place the vehicle in a working position and lock the parking brake. Turn off the ignition.

2. Disconnect the negative battery cable from the battery.

Warning:

The BUSNPB scheme has an emergency power reserve. To discharge the capacitors after turning off the ignition, wait at least 10 seconds before performing any work.

Removing the SNPB control unit

3. Remove the floor center console as described here.

4. Disconnect the shoe (1) from the SNPB control unit (2).

The airbag light on the dashboard came on.

The airbag light on the dashboard came on. What does this mean and what could happen? What is the reason.

How to remove the driver's airbag on a LADA GRANT

One day, when the ignition was turned on and the engine was still running, the display on the instrument panel stopped.

5. Remove the nuts (3) and remove the control unit (2).

Installation of the SNPB control unit

6. Install the control unit in the reverse order of removal. When installing the automatic control unit, the arrow on the device cover must be directed along the direction of movement of the vehicle. The tightening torque for BUSSBP nuts is from 7 to 8 Nm (from 0.7 to 0.8 kgcm).

The note:

The SNPB control unit is delivered to the spare parts in a locked state. After replacing the control unit, it must be unlocked.

7. After completing the removal/installation of the SNPB components, connect the ground terminal to the battery.

Warning:

The ignition must be turned off while connecting the ground terminal to the battery. In this case, no one should be in the car.

SNPB Performance Testing

Warning:

For safety reasons, the first ignition on a vehicle with a replaced driver airbag module must be performed as follows:

• open the driver's door;
• Without sitting on the seat, with your right hand, placing it under the steering wheel, turn on the ignition, and the head of the specialist performing this operation should not be between the steering wheel and the driver’s seat.

After turning on the ignition, in the absence of malfunctions, the driver's seat belt warning lamp should turn on for 3-4 seconds and turn off.

Turn off the ignition. Press the MFP cover in the area of ​​the beep symbol to make sure there is a beep.

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What to do if the car does not start after the airbag deploys?

On many car models (Lada Granta or Priora, Ford Focus 2, Opel Astra and others), the injectors turn off after the airbag is activated. This is done for safety and to prevent the car from catching fire.

To restore the supply of the fuel mixture, you should contact a specialist (it is unlikely that you can restore the supply of the hot mixture yourself).

Sometimes disconnecting the battery for 6-10 minutes (disconnecting the terminal) helps. In addition, a number of manufacturers install unlock buttons.

How to remove the error?

On numerous forums, car enthusiasts discuss how to remove the error after the airbags deploy. This is logical, because driving with a burning lamp is an unpleasant and dangerous pleasure.

When the indicator lights up, you should take the following measures:

• Check the operation of the airbag when starting the engine;
• Make diagnostics for errors and determine the code. It is often possible to do such work only at a service station;
• Change or repair the airbag;
• Update the system module.

There are cases when the light comes on due to insufficient contact or due to the absence of airbags dismantled after an accident.

Ideally, the clock spring, control unit, wiring, belts and airbag are replaced. As mentioned, costs are reduced when purchasing units from disassembly.

To temporarily “extinguish” the light bulb, it is possible to install a “plug” (a special resistance of 2.0 - 2.2 ohms).

• Disconnect the battery, install the control unit and clock spring. Instead of the airbag, an equivalent resistance of 2.2 Ohms is installed;
• Connect the battery and check whether the lamp flashes or not;
• Erase the crash date from the airbag control unit;
• Go to a service center to reset the error in the control unit using a scanner. If everything is correct, then the light will not light, that is, it lights up for a short time and goes out.

Airbag control structure

Modern airbag control systems are structurally simple and consist of the following elements:

1. ECU (electronic control unit). Its main element is a three-dimensional accelerometer, which calculates the deceleration of the car when impacted on different axes. It must be borne in mind that the command for airbag squibs is issued only during sharp deceleration in a moving car, so complaints about allegedly faulty airbags that do not work at low speed are actually groundless. The control unit also reads information from a number of additional sensors described below.

1. Shock sensors are an element of outdated Airbag systems that did not have an accelerometer built into the ECU. Such sensors were attached either in the bumper area, and responded to critical deformation, or in the front part of the cabin, and gave a signal about a sharp deceleration. They only made it possible to determine the fact of an impact in the direction where they were located, which is why they are not applicable on modern cars with many airbags that are triggered depending on the direction of the impact.
2. Airbags. They consist of an elastic shell that is filled with gas when the squib is detonated by an electrical signal. The only airbag malfunction that the ECU can track is a significant change in the resistance of the squib ignition circuit relative to the specified one, that is, a short circuit or break. If the reason for the airbag warning light to come on is a detected open circuit, you can turn it off on a number of vehicles by removing this airbag or another element from the system configuration menu using a diagnostic scanner.

   

3. Auxiliary actuators . The most common are seat belt pretensioners. They are squibs that, before the airbag deploys, press the person to the back of the seat. In this case, the pretensioner will work only in one case - if the seat belt is extended to a sufficient length (determined by the sensor located on the belt reel) and is latched into the buckle. A malfunction of any of these sensors will not only cause the warning light to come on, but also block the corresponding pretensioner.
4. Additional sensors. These include seat belt sensors, the front passenger's front airbag switch, and so on. Their malfunction also leads to the registration of a corresponding error and the turning on of a warning lamp on the instrument panel.
5. Wiring and connectors. The most common problems associated with them are mechanical damage. The most common malfunction of safety systems lies in a break in the connecting cable of the driver's airbag.