The LADA Priora car, depending on the configuration, can be equipped with two types of systems:

- Single-channel SNPB (basic configuration) - driver's front airbag system. Seat belts for driver and front passenger of normal inertial action;

- Four-channel SNPB - front airbag system for driver and front passenger with front seat belts with a pretensioner.

Система надувных подушек безопасности Лада Приора

The single-channel airbag system includes:

- gas generator module (MNPBV) - 1118-8232010-00;

- the control unit for the airbag system - 2170-3824010-01;

- a connector with a rotating device - 2110-3709315-00 / 1118-3709315-01;

- steering wheel with signal switch - 1119-3402012-00.

The four-channel airbag system includes:

- gas generator module (MNPBV) - 2172-8232010-00;

- the control unit for the airbag system - 2170-3824010-11;

- a connector with a rotating device - 2110-3709315-00;

- steering wheel with signal switch - 1119-3402012-00;

- passenger airbag module - 2170-8233020-00;

- front right / left seat belt 2170-8217020 / 21-10.

Система надувных подушек безопасности Лада Приора

The gas generator module (MNPBV), Figure 2, consists of a gas generator 1, housing 3, with an inflatable cushion folded in it, a facing cover 6 and fasteners.

The gas generator produces gas inside the module to inflate the airbag.

Ignition of the pyrotechnic substance in the gas generator is carried out by an igniter-igniter mounted in the gas generator body.

There are two main types of gas generators.

The pyrotechnic gas generator consists of a body filled with a solid pyrotechnic substance and an igniter-igniter.

In it, gas is produced by the combustion of a pyrotechnic substance.

Applies to the driver's airbag module. The hybrid gas generator consists of a body filled with compressed inert gas and pyrotechnic substance, and an igniter-igniter.

Applies to the passenger airbag module. Igniter-igniter - a device with electrical resistance and pyrotechnic substance.

After receiving an electrical signal from BUSNPB, the electrical resistance heats up and ignites the pyrotechnic substance of the igniter-igniter, followed by the ignition of the bulk of the pyrotechnic substance of the gas generator.

Inflatable airbag - a bag made of synthetic material, mounted in the module body, filled with gas under pressure when the module is triggered.

The airbag is folded in a special way and is covered with a front cover.

Trim cover - a part that covers the airbag and bursts when the airbag is filled with gas along the structural seam located on the back of the cover.

Система надувных подушек безопасности Лада Приора

Block 1, figure 3, control of the SNPB is fixed with three nuts on the bracket 2 on the floor tunnel and is located under the console of the instrument panel, under the floor mat.

The BUSNPB includes an acceleration sensor and an electronic circuit for generating control signals supplied to the airbag modules and seat belts with a pretensioner.

The control unit converts and processes information from the acceleration sensor located in the unit itself and generates an electrical signal to the igniter of the gas generator of the airbag module (s) and seat belt pretensioners.

The control unit carries out SNPB diagnostics, displaying the state of the system on the diagnostic signaling device, and has software for storing fault codes and supporting the diagnostic data exchange channel on the "K" line according to ISO 9141.

Система надувных подушек безопасности Лада Приора

The connector with a rotating device, Figure 4, in the SNPB part, is intended for the electrical connection of the driver's airbag module, located on the steering wheel, with the car's wiring.

Система надувных подушек безопасности Лада Приора

The steering wheel, Figure 5, structurally contains a bracket 1 for attaching the driver's airbag module.

The driver's and front passenger's seat belts with a pretensioner consist of a body, a reel, a belt pretensioner and a belt with a tongue buckle.

The pre-tensioning device for the front seat belt is integrated into the reel and ensures the movement of the belt in the direction of winding around the reel. Pre-tensioned seat belts differ from conventional inertia belts by the presence of a gas generator with a tube filled with steel balls and a spool of belt with gear. Pyrotechnic gas generator.

When burned, the evolved gas pushes the steel balls through the tube onto the gear wheel of the tape reel, allowing it to rotate.

The structure of the gas generator is similar to that of the airbag module.

In the design of a seat belt with a pre-tensioning device, there is a mechanism for limiting the degree of tension when the SNPB is triggered.

Mechanical tension limiting mechanism, it does not require adjustment and maintenance.

When the SNPB is triggered after pre-tensioning the belt belt under the action of inertia forces acting on the driver and front passenger, the belt belt tension is further increased and the mechanism for limiting the degree of tension automatically maintains the set value.

Removal and installation of units and parts of SNPB

Система надувных подушек безопасности Лада Приора

Before starting work, place the vehicle in the workplace, brake with the parking brake. Switch off ignition.

Disconnect battery earth terminal.

Attention. There is an emergency supply of electricity in the BUSNPB scheme.

In order to discharge the capacitors after turning off the ignition, it is necessary to wait at least 10 seconds before performing work.

Removal of MNPBV

Система надувных подушек безопасности Лада Приора

Set the front wheels to the straight-ahead position of the vehicle.

The upper steering wheel spokes must be horizontal.

Open the left front door.

From outside the vehicle, to the side of the steering wheel, turn the steering wheel 180 degrees and unscrew the right bolt, Figure 7, securing the gas generator module to the steering wheel.

Return the steering wheel to its original position and unscrew the left bolt securing the gas generator module.

Система надувных подушек безопасности Лада Приора

Disconnect module 1, Figure 8, from the steering wheel, without tensioning the pad harness 2.

Using a flat screwdriver, remove the retainer 3 from the block 2, then, without applying additional lateral forces, disconnect the block 2 from the module 1 and remove the gas generator module.

Place the non-activated gas generator module on a flat surface with the facing cover facing up.

When the L-shaped block 2 is melted, in case of dismantling the activated gas generator module, disconnect the module by cutting the harness of the block 2.

Installation MNPBV

Before installing the gas generator module, visually make sure that there are no mechanical damages and that there is a label with a barcode and identification number on the gas generator module.

When installing a new gas generator module, tear off part of label 2, Figure 2, with a barcode from the gas generator module and paste it into the "Special Notes" section of the service book, indicating the installation date and vehicle mileage, and the reason for replacement.

Outside the car, to the side of the steering wheel, bring the gas generator module to the installation site in the steering wheel, without applying lateral forces, insert the L-shaped block 2, Figure 8, into the gas generator module connector 1 until a characteristic locking click is obtained.

Insert the retainer 3 into the block 2 until it clicks.

Before installing the latch in the L-shaped block, the airbag module is in the transport position, the contacts of the igniter-igniter connector are shunted.

Install the gas generator module into the steering wheel, aligning the clips 4, Figure 2, on the body 3 of the gas generator module with mating holes 2, Figure 5, on the steering wheel bracket 1.

Turn the steering wheel 180 degrees and tighten the right bolt, Figure 7, fastening the gas generator module, return the steering wheel to its original position and tighten the left bolt securing the gas generator module.

Tighten the fixing bolts of the gas generator module. The tightening torque of the bolts is from 6.4 to 9.6 Nm (from 0.7 to 0.9 kgf.m).

Removing the connector with a rotating device

Remove MNPBV. Unscrew two screws 7, Figure 6, and two screws 8 and remove the upper facing casing 1.

Unscrew three screws 9 and remove the lower casing 6 assembly with the insert 10 of the lower casing.

Remove O-ring 5 from the ignition switch.

Система надувных подушек безопасности Лада Приора

Disconnect the block 1, Figure 9, of the harness of the device rotating from the block of the harness of the horn switch.

Set the front wheels to the straight-ahead position of the vehicle.

The upper steering wheel spokes must be horizontal.

Система надувных подушек безопасности Лада Приора

Unscrew the steering wheel nut and remove the steering wheel from the steering shaft by passing the pads through the hole in the steering wheel hub.

After removing the steering wheel, exclude the axial movement of the cylindrical lock 4, Figure 4. To avoid damage, do not rotate the cover 1 of the rotating device, as it is automatically fixed.

Remove the wiper and warning light switches from the connector.

Disconnect the instrument panel harness pads from the connector.

Loosen the mounting bolt and remove the connector with the rotating device from the steering shaft.

Installing a Connector with a Rotating Device

Before installing, the steering rack must be in the middle position, while the front wheels must be in the straight-ahead position of the vehicle.

Install the connector with the rotating device on the steering shaft; do not tighten the connector fastening bolt.

Система надувных подушек безопасности Лада Приора

When installing a new connector with a rotating device, remove from the rotating device 1, Figure 11, the red transport key 2, which fixes the movable element of the device in the middle position by turning it around its axis by 90 ° + 30 °.

Pass pads 1 and 4, Figure 9, of the rotating device into the right hole of the steering wheel hub and install the steering wheel on the steering shaft.

In this case, the upper spokes of the steering wheel must be in a horizontal position.

Install and tighten the steering wheel nut 3. The tightening torque of the nut is from 31.4 to 51.0 Nm (from 3.2 to 5.1 kgf.m).

Move the connector with the device rotating close to the steering wheel hub along the axis of the steering shaft and then move it in the opposite direction by 2-3 mm.

Tighten the connector securing bolt. Connect the connector 1, Figure 9, of the harness of the rotating device to the connector 2 of the harness of the horn switch.

Connect the instrument panel harness pads to the connector. Install the wiper and light switch in the connector.

Install O-ring 5, Figure 6, on the ignition switch.

Install the casing 6 of the lower facing assembly with the insert 10 of the lower casing and fix it with screws 9.

Install the casing 1 with the upper facing and fasten it with the casing 6 with the lower facing screws 6 and 8.

Rotating the steering wheel to the right and left until it stops, make sure that there are no jamming, knocking and smooth rotation, as well as that the direction indicator lever can be reset.

By shaking the steering wheel, make sure that there are no radial and axial play of the steering wheel. Install MNPBV.

Removing the control unit SNPB

Система надувных подушек безопасности Лада Приора

Unscrew the fastening screws and remove screen 1, Figure 11, left side and right side screen.

Система надувных подушек безопасности Лада Приора

Fold back the floor mat to free access to the block 1, figure 13.

Press the latch 2 and, without disconnecting the pads from the BUSNPB connector, pull the lever 3 as shown in Figure 13, thereby ensuring automatic disconnection of the pads 1 from the SNPB control unit connector.

Система надувных подушек безопасности Лада Приора

Bend the floor mat from the side of the right side screen, unscrew the nuts 1, Figure 14, fastening the control unit 2 of the SNPB and remove the BUSNPB.

Installation of control unit SNPB

Install the control unit in the reverse order of removal.

When installing BUSNPB arrow 4, Figure 14, on the block cover should be directed in the direction of the vehicle. The tightening torque of the BUSNPB fastening nuts is from 6.4 to 9.6 N.m (from 0.64 to 0.96 kgf.m).

The SNPB control unit is supplied as spare parts in a locked state.

After replacing the control unit, it must be unlocked.

Removing the MNPBP

Система надувных подушек безопасности Лада Приора

Remove the cover of the glove compartment. Unscrew nuts 5, Figure 15, fastening the module 1 to the bracket 3.

Through the opening of the glove box, alternately acting on the latches 4 of the facing cover of the MNPBP, feeding from below, remove the MNPBP from the dashboard.

Without tensioning the wiring harness to the MNPBP, use a flat screwdriver to remove the retainer from the L-shaped block connected to connector 6 of the MNPBP, then, without applying additional lateral forces, disconnect the L-shaped block from the module and remove the airbag module.

Place the non-activated airbag module on a flat surface with the cover facing up.

In the case of dismantling a triggered airbag module, check the integrity of the wiring harness to the airbag module. If damage is found to the block to the airbag module, open or short circuit in the wires to the airbag module, replace the harness.

Installation of MNPBP

Before installing the MNPBP, visually make sure that there is no mechanical damage and that there is a label with a barcode and an identifying number on the module.

When installing a new airbag module, tear off part of the barcode label from the module and paste it into the "Special Notes" section of the service book, indicating the installation date and vehicle mileage, and the reason for replacement.

While in the car, bring the airbag module to the installation site in the dashboard, without applying lateral forces, insert the L-shaped block of the dashboard wiring harness into connector 6 of the airbag module until a characteristic locking click is obtained.

Insert the retainer into the L-shaped block until it clicks.

Before installing the latch in the L-shaped block, the airbag module is in the transport position, the contacts of the igniter-igniter connector are shunted.

Install the airbag module into the dashboard and fix the MNPBS cover in the dashboard. Screw in and tighten the nuts 5 for fastening the MNPBP to the bracket 3. The tightening torque of the nuts for the MNPBP is from 8 to 16 Nm (from 0.8 to 1.6 kgf.m).

Removing seat belts with a pretensioner

Система надувных подушек безопасности Лада Приора

Unscrew the two screws securing the trim 1, Figure 15, of the rear door sill, remove the trim.

Remove the trims and caps from the seat belt bolt heads.

Unscrew bolt 4, Figure 16, fastening the strap leg 3 on the floor sill.

Remove center pillar lower trim 2.

Система надувных подушек безопасности Лада Приора

Disconnect connector 1, Figure 17, from the retarder coil 2 gas generator.

Система надувных подушек безопасности Лада Приора

Unscrew bolt 1, Figure 18, fastenings of the seat belt clip 2 on the B-pillar.

Unscrew bolt 3, figure 17, reel fastenings 2 and remove the front seat belt with reel assembly.

Remove the bolt securing the front seat belt buckle to the seat bracket and remove the buckle.

Fitting seat belts with pre-tensioning device

Install the seat belts in the reverse order of removal.

After opening the locks, the seat belts must return from the working position to the initial position freely without jamming.

Remove the transport washers before installing the seat belts. The tightening torque of the seat belt mounting bolts is 18 to 32 Nm.

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

When connecting the ground wire terminal to the storage battery, the ignition must be turned off. In this case, no one should be in the passenger compartment.

Check the performance of the SNPB

For safety reasons, the first ignition on in a vehicle with a driver airbag module replaced should be 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, while 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 faults, the diagnostic indicator (orange symbol) should turn on for 3-4 seconds and turn off.

Switch off ignition.

When removing / installing the steering wheel, by pressing the switches located in the horizontal spokes of the steering wheel, make sure that there is a sound signal.

Diagnosis of SNPB

Система надувных подушек безопасности Лада Приора

The electrical connection diagram of the single-channel SNPB of the LADA Priora car is shown in Figure 19.

The purpose of the terminals of the SNPB control unit is shown in Table 1.

1 - driver's airbag, contact "-"

2 - driver's airbag, contact "+"

3 - passenger airbag, contact "-"

4 - passenger airbag, contact "+"

7 - Pretensioner RB passenger, contact "-"

8 - Pretensioner RB driver, contact "+"

9 - Pretensioner RB driver, contact "-"

10 - the diagnostic indicator in the instrument cluster

11 - Common wire (weight)

25 - To terminal "15" of the ignition switch

30 - Pretensioner RB passenger, contact "+"

46 - Contact "M" diagnostic block (K-line)

To view the fault codes and SNPB parameters, the DST-2M (DST-10S) diagnostic device is used, which is connected to the vehicle's diagnostic block.

The list of codes of malfunctions displayed by the diagnostic device in the "Malfunction" mode is given in table 2

Code - Code Description

B1001

Leakage to positive terminal 30 "+" RB passenger

Leakage to minus terminal 7 "-" RB passenger

High resistance of contacts 7 and 30 RB of the passenger

Low resistance of contacts 7 and 30 RB of the passenger

B1002

Leakage to positive terminal 8 "+" RB driver

Leakage to minus terminal 9 "-" RB driver

High resistance of contacts 8 and 9 RB of the driver

Low resistance of contacts 8 and 9 RB driver

B1003

Leakage to plus of contact 2 "+" PB of the driver

Leakage to minus contact 1 "-" PB of the driver

High resistance of contacts 1 and 2 of the driver's PB

Low resistance of contacts 1 and 2 of the driver's PB

B1004

Leakage to positive terminal 4 "+" PB of the passenger

Leakage to minus terminal 3 "-" PB of the passenger

High resistance of contacts 3 and 4 PB passenger

Low resistance of contacts 3 and 4 PB passenger

B1040

Leakage to positive terminal 10 of the diagnostic indicator

Leakage to minus terminal 10 of the diagnostic indicator

B1042

Supply voltage out of operating range (≥ 16.5 V or ≤ 10.0 V)

Low supply voltage due to bounce of battery contacts

B1044

- Incorrect connection of the fuse lines

B10C0 - B10CE,

B1081 - B1084,

B10B1 - B10BE,

B109A - B109C

- Internal malfunction of the SNPB control unit

If a fault is found of the "High contact resistance" type, check:

- reliability of connection of the instrument panel harness block to the BUSNPB;

- reliability of connection of the block to the corresponding component of the SNPBV (MNPBV and rotating device, MNPBP, seat belt pretensioner);

- the corresponding electrical circuit to the BUSNPB for an open (before checking the circuit, it is imperative to disconnect the pads from the BUSNPB and the corresponding component of the SNPB).

If a malfunction of the "Low contact resistance" type is found, check:

- completeness and reliability of the block fixation in the connector of the corresponding component of the SNPBV (the cause of this malfunction may be the not installed retainer in the L-shaped block to the MNPBV, MNPBP, the not fixed block in the connector of the seat belt pretensioner, rotating device);

- the corresponding electrical circuit to the BUSNPB for a short circuit between the contacts (before checking the circuit, it is imperative to disconnect the blocks from the BUSNPB and the corresponding component of the SNPB).

If a malfunction "Internal malfunction of the SNPB control unit" is detected, replace the SNPB.

The list of parameters displayed by the diagnostic device in the "Parameters. Current state of SNPB" mode is given in Table 3.

Parameter

Name

Unit

Single channel

SNPB

Four-channel

SNPB

Спр ПБ вод

Circuit resistance

airbags

driver

Ом

2,70-3,30

2,70-3,30

Спр ПБ пас

Resistance

airbag circuit

passenger

Ом

12,40-13,20

1,70-2,30

Спр РБ вод

Circuit resistance

pretensioner

seat belt

driver

Ом

12,40-13,20

1,70-2,30

Спр РБ пас

Circuit resistance

belt pretensioner

passenger safety

Ом

12,40-13,20

1,70-2,30

 

If the control unit is in a locked state, as evidenced by the constant burning of the indicator after the ignition is turned on, it must be unlocked using the DST-2M device, for which, in the SNPB menu, select: "Mode record" "ECU lock" "BU lock - OFF"

If it is necessary to forcibly deactivate the passenger airbag module in the four-channel airbag system, select in the SNPB menu: the ignition is switched on, the diagnostic indicator will turn on for 3-4 seconds, then it will blink 12 times, informing about the blocking of the MNPBP, and will turn off.