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SECTION 8B

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

Caution : Disconnect the negative battery cable before removing or installing any electrical unit or when a tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable will help prevent personal injury and damage to the vehicle. The ignition must also be in B unless otherwise noted.

DESCRIPTION AND OPERATION

(Left-Hand Drive Shown, Right-Hand Drive Similar)

AIRBAG MODULE

Driver Airbag Module

Caution : Tampering with the driver side airbag module creates the risk of an injury from an unexpected deployment. Therefore, the driver side air-bag module should never be disassembled.

The driver airbag module is under the center pad on the steering wheel.
The driver airbag module contains an ignitor charge and a gas generator to inflate the folded airbag.

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Passenger Airbag Module

Caution : Tampering with the passenger side airbag module creates the risk of an injury from an unexpected deployment. Therefore, the passenger side airbag module should never be disassembled.

The passenger airbag module is on the passenger side of the instrument panel.
The passenger airbag module contains an ignitor charge and a gas generator to inflate the folded airbag.

SENSING AND DIAGNOSTIC MODULE (SDM)

The SDM
The SDM controls the deployment of the airbag system through the use of the

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Arming Sensor

The arming sensor is safety device made up of a dual-contact, electro-mechanical switch that:

Capacitor

The capacitor provides reserve power.

Crash Sensor

The crash sensor, or accelerometer, electronically represents the acceleration or deceleration of the vehicle during a frontal impact. In this electronic representation, the electrical signal is proportional to the acceleration or deceleration of the vehicle.

SIR WARNING LAMP

The supplemental inflatable restraints (SIR) system includes a self-diagnostic function.
If there is a failure of the sensing and diagnostic module or the external circuits, the SIR warning lamp in the instrument cluster turns ON.
As a system check, the SIR warning lamp also turns ON when the ignition is first switched to the ON position.

Correct Functioning

The system is working properly if:

Faulty Functioning

The system is not working properly, meaning one of the SIR components or the wiring connector is faulty, if:

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CLOCK SPRING

The clock spring:

Notice : Turning the steering wheel more than three and one-quarter turns may damage the clock spring.

Turning the steering wheel:

Caution : Disassembling the clock spring can cause injury and vehicle damage.

The clock spring should never be disassembled.
The clock spring must be replaced if the airbags have been deployed.

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WIRING HARNESS/CONNECTORS

The connector for the sensing and diagnostic module (SDM) has a built-in shorting bar that will turn ON the warning lamp if there is a poor connection at the SDM.
As an anti-deployment mechanism, additional shorting bars are in the
When these connectors are separated, the shorting bars will short circuit any current which is applied, preventing the current from reaching the airbag modules.

SIR SYSTEM

The supplemental inflatable restraints (SIR) system is a safety device used in conjunction with the seat belts.
The airbag does not replace the function of the seat belt. The driver and the passengers must always fasten their seat belts and adjust them for a proper fit.
The SIR is designed to protect the driver and the front seat passenger in the event of a significant frontal impact to the vehicle. The airbags deploy if the force is applied from a direction within 30 degrees of the vehicle's centerline and above 25 km/h (15 mph) speed.
The SIR consists of a

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GENERAL PRECAUTIONS

The supplemental inflatable restraints (SIR) warning lamp must illuminate when the ignition is switched ON, and then turn OFF after approximately 4 seconds.
There is a fault in the airbag system if
If the warning lamp indicates there is a fault in the airbag system, assume that the SIR system may not be functional.

Caution : Failure to follow all service procedures in the correct sequence can cause the airbag system to deploy unexpectedly and possibly cause a serious injury.

Only trained personnel at franchised Daewoo dealers and authorized Daewoo service dealerships may service the airbag system.
Never attempt to disassemble, repair, or reuse the
When making SIR repairs,

AIRBAG DEPLOYMENT CONDITION

Airbag is designed to deploy under 303 left/right angle barrier and above 25 km/h (15 mph) speed.

Concrete Barrier Deployment Condition

In case of the 0° frontal concrete battier, airbag may deploy above 25 km/h (15 mph) speed.

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AIRBAG DEPLOYMENT PROCEDURE

  1. Non-Deployment condition
  2. a. Initiator
    b. Piston
    c. Safety disc
    d. Compressed Ar gas
  3. When crashing, firing current flows from the SDM to the initiator.
  4. Initiator is burning and the inside pressure is increasing and the piston hits the safety disc.
  5. Safety disc is broken and the compressed Ar gas is spouted out.
  6. Compressed Ar gas and the burned initiator are carbureted. And the airbag is deployed.


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