Text preview for : M38b1 Airbags 1-6.pdf part of Daewoo Matiz Service Manual, Wiring Diagram - 16 Part File - 62 File



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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.

TABLE OF CONTENTS
Description and Operation . . . . . . . . . . . . . . . . . . Airbag Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sensing and Diagnostic Module (SDM) . . . . . . . SIR Warning Lamp . . . . . . . . . . . . . . . . . . . . . . . . Clock Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wiring Harness/Connectors . . . . . . . . . . . . . . . . . SIR System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Precautions . . . . . . . . . . . . . . . . . . . . . . . 8B-3 8B-3 8B-3 8B-3 8B-4 8B-4 8B-4 8B-5 DTC 10 Driver Pretensioner Circuit, Resistance Too Low . . . . . . . . . . . . . . . . . . . . 8B-32 DTC 11 Driver Pretensioner Circuit, Short to Ground . . . . . . . . . . . . . . . . . . . . . . . . 8B-34 DTC 12 Driver Pretensioner Circuit, Short to Battery Voltage . . . . . . . . . . . . . . . . . 8B-36 DTC 13 Passenger Pretensioner Circuit, Resistance Too High . . . . . . . . . . . . . . . . . . . . 8B-38 DTC 14 Passenger Pretensioner Circuit, Resistance Too Low . . . . . . . . . . . . . . . . . . . . 8B-40 DTC 15 Passenger Pretensioner Circuit, Short to Ground . . . . . . . . . . . . . . . . . . . . . . . . 8B-42 DTC 16 Passenger Pretensioner Circuit, Short to Battery Voltage . . . . . . . . . . . . . . . . . 8B-44 DTC 18 Connection Between Driver Firing Circuit and Driver Pretensioner Circuit . . . . . 8B-46 DTC 19 Connection Between Driver Firing Circuit and Passenger Pretensioner Circuit 8B-48 DTC 20 Connection Between Passenger Firing Circuit and Driver Pretensioner Circuit . . . . . 8B-50 DTC 21 Connection Between Passenger Firing Circuit and Passenger Pretensioner Circuit 8B-52 DTC 22 Connection Between Driver Pretensioner Circuit and Passenger Pretensioner Circuit 8B-54 DTC 23 Ignition Input Circuit, Voltage Too High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8B-56 DTC 24 Ignition Input Circuit, Voltage Too Low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8B-58 DTC 25 Warning Lamp Failure . . . . . . . . . . . . . 8B-60 DTC 31 SDM Internal Fault . . . . . . . . . . . . . . . . 8B-63 DTC 32 SDM Crash Recorded . . . . . . . . . . . . . 8B-63 Diagnostic Illustration 1 Diagnostic Illustration 2 Diagnostic Illustration 3 Diagnostic Illustration 4 ................... ................... ................... ................... 8B-63 8B-64 8B-64 8B-64

Airbag Deployment Condition . . . . . . . . . . . . . . . 8B-5 Airbag Deployment Procedure . . . . . . . . . . . . . . 8B-6 Component Locator . . . . . . . . . . . . . . . . . . . . . . . . 8B-7 SIR Component . . . . . . . . . . . . . . . . . . . . . . . . . . . Diagnostic Information and Procedures . . . . . Bulb Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fault Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8B-7 8B-8 8B-8 8B-8

Clearing Fault Codes . . . . . . . . . . . . . . . . . . . . . . 8B-8 Microprocessor ­ Independent Lamp Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8B-8 System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . 8B-10 Fault Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8B-12 DTC 01 Driver Firing Circuit, Resistance Too High . . . . . . . . . . . . . . . . . . . . 8B-14 DTC 02 Driver Firing Circuit, Resistance Too Low . . . . . . . . . . . . . . . . . . . . 8B-16 DTC 03 Driver Firing Circuit, Short To Ground . . . . . . . . . . . . . . . . . . . . . . . 8B-18 DTC 04 Driver Firing Circuit, Short To Battery Voltage . . . . . . . . . . . . . . . . DTC 05 Passenger Firing Circuit, Resistance Too High . . . . . . . . . . . . . . . . . . . . DTC 06 Passenger Firing Circuit, Resistance Too Low . . . . . . . . . . . . . . . . . . . . DTC 07 Passenger Firing Circuit, Short To Ground . . . . . . . . . . . . . . . . . . . . . . . DTC 08 Passenger Firing Circuit, Short To Battery Voltage . . . . . . . . . . . . . . . . DTC 09 Driver Pretensioner Circuit, Resistance Too High . . . . . . . . . . . . . . . . . . . . 8B-20 8B-22 8B-24 8B-26 8B-28 8B-30

Diagnostic Illustration 5 . . . . . . . . . . . . . . . . . . . 8B-64 Diagnostic Illustration 6 . . . . . . . . . . . . . . . . . . . 8B-65 Diagnostic Illustration 7 . . . . . . . . . . . . . . . . . . . 8B-65

DAEWOO M-150 BL2

8B ­ 2 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
Diagnostic Illustration 8 . . . . . . . . . . . . . . . . . . . Diagnostic Illustration 9 . . . . . . . . . . . . . . . . . . . Diagnostic Illustration 10 . . . . . . . . . . . . . . . . . . Diagnostic Illustration 11 . . . . . . . . . . . . . . . . . . . Diagnostic Illustration 12 Diagnostic Illustration 13 Diagnostic Illustration 14 Diagnostic Illustration 15 .................. .................. .................. .................. 8B-65 8B-65 8B-66 8B-66 8B-66 8B-66 8B-67 8B-67 Driver Airbag Module . . . . . . . . . . . . . . . . . . . . . Clock Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Passenger Airbag Module . . . . . . . . . . . . . . . . . Sensing and Diagnostic Module (SDM) . . . . . . Airbag Module Deployment (In Vehicle) . . . . . . Airbag Module Deployment (Outside of Vehicle) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Deployed Airbag Module Disposal Procedure Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fastener Tightening Specifications . . . . . . . . . . Special Tools and Equipment . . . . . . . . . . . . . . Special Tools Table . . . . . . . . . . . . . . . . . . . . . . . Schematic and Routing Diagrams . . . . . . . . . . 8B-69 8B-70 8B-71 8B-72 8B-74 8B-76 8B-76 8B-78 8B-78 8B-78 8B-78 8B-79

Diagnostic Illustration 16 . . . . . . . . . . . . . . . . . . 8B-67 Diagnostic Illustration 17 . . . . . . . . . . . . . . . . . . 8B-67 Diagnostic Illustration 18 . . . . . . . . . . . . . . . . . . 8B-68 Diagnostic Illustration 19 . . . . . . . . . . . . . . . . . . Diagnostic Illustration 20 . . . . . . . . . . . . . . . . . . Diagnostic Illustration 21 . . . . . . . . . . . . . . . . . . Repair Instructions . . . . . . . . . . . . . . . . . . . . . . . . 8B-68 8B-68 8B-68 8B-69

Supplemental Inflatable Restraints (SIR) Electrical Schematic . . . . . . . . . . . . . . . . . . . . 8B-79

On-Vehicle Service . . . . . . . . . . . . . . . . . . . . . . . . . 8B-69

DAEWOO M-150 BL2

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B ­ 3

DESCRIPTION AND OPERATION
(Left­Hand Drive Shown, Right­Hand 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 airbag 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.

D Illuminates a warning lamp that alerts the driver to any faults. D Allows the fault codes to be retrieved with a scan tool. The SDM controls the deployment of the airbag system through the use of the D Arming sensor. D Capacitor. D Crash sensor, or accelerometer.

D110B007

Arming Sensor
D110B006

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.

The arming sensor is safety device made up of a dualcontact, electro-mechanical switch that: D Acts independently of the electronic components. D Keeps the firing circuits for the airbags unarmed under normal driving conditions. D Allows the airbags to deploy under the required conditions.

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.

SENSING AND DIAGNOSTIC MODULE (SDM)
The SDM D D D D Has no user-serviceable parts. Is under the front console assembly. Continuously monitors the system components. Records any faults which are discovered.

SIR WARNING LAMP
The supplemental inflatable restraints (SIR) system includes a self-diagnostic function.

DAEWOO M-150 BL2

8B ­ 4 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
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: D The SIR warning lamp turns OFF after approximately four seconds. Faulty Functioning The system is not working properly, meaning one of the SIR components or the wiring connector is faulty, if: D The SIR warning lamp fails to turn ON when the ignition is first switched ON. D The SIR warning lamp remains ON. The clock spring should never be disassembled. The clock spring must be replaced if the airbags have been deployed.

D110B008A

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 D Connector for the clock spring at the lower steering column. D Passenger airbag module connector.
D110B009A

CLOCK SPRING
The clock spring: D Is on the steering column. D Contains a coil that is the electrical contact between the steering column wiring harness and the driver side airbag module. D Is part of the circuit for the horn. Notice: Turning the steering wheel more than three and one-quarter turns may damage the clock spring. Turning the steering wheel: D In one direction tightens the coil. D In the opposite direction loosens the coil. D More than three and one-quarter turns may damage the clock spring. Caution: Disassembling the clock spring can cause injury and vehicle damage.

D SDM connector. 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 D Driver airbag module. D Passenger airbag module.

DAEWOO M-150 BL2

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B ­ 5
D D D D Sensing and diagnostic module. Steering column clock spring. Wiring harness. SIR malfunction warning lamp. 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 D Airbag modules. D Clock spring. D Sensing and diagnostic module. D Wiring harness. When making SIR repairs, D D D D
D110B001

Inspect any SIR part before it is installed. Use only new parts. Do not install used SIR parts from other vehicles. Do not install any part that has been dropped or that has dents, cracks, or other defects.

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 D The warning lamp does not turn OFF. D The warning lamp illuminates while the vehicle is in operation.

AIRBAG DEPLOYMENT CONDITION
Airbag is designed to deploy under 30_ 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.

DAEWOO M-150 BL2

8B ­ 6 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

AIRBAG DEPLOYMENT PROCEDURE
1. Non­Deployment condition a. b. c. d. Initiator Piston Safety disc Compressed Ar gas

D110B002

2. When crashing, firing current flows from the SDM to the initiator. 3. Initiator is burning and the inside pressure is increasing and the piston hits the safety disc.

D110B003

4. Safety disc is broken and the compressed Ar gas is spouted out.

D110B004

5. Compressed Ar gas and the burned initiator are carbureted. And the airbag is deployed.

D110B005

DAEWOO M-150 BL2