2004 DAEWOO LACETTI airbag

STEERING WHEEL AND COLUMN 6E – 15
DAEWOO V–121 BL4
STEERING COLUMN
(Left–Hand Drive Shown, Right–Hand Dirve
Similar)
Important : Remove the steering column only if the follow-
ing conditions exist:
S The steering column requires replacement.
S The steering and the ignition lock housing require
replacement.
S Another operation requires the removal of the
steering column.
Notice : The steering column is extremely susceptible to
damage after it has been removed from the vehicle. Drop-
ping the column assembly on its end or hammering the
end of the steering shaft can collapse the steering shaft or
loosen the plastic injections which maintain column rigid-
ity. Leaning on the column can cause it to bend or deform.
Any of the above damage can impair the column’s collaps-
ible design. If it is necessary to remove the steering wheel,
use only the specified steering wheel puller.
Removal Procedure
1. Disconnect the negative battery cable and let the
vehicle sit for 1 minute to deactivate the airbag.
2. Remove the the lower instrument trim panels. Refer
to Section 9E, Instrumentation/Driver Information.
3. Remove the upper and the lower steering column
cover panel by removing the screws.
4. Remove the switch levers. Refer to ”Turn Signal
Switch and Lever” and ”Wiper Switch and Lever” in
this section.
5. Remove the immobilizer module. Refer to Section
9T, Remote Keyless Entry and Anti–theft System.
6. Disconnect the airbag electrical connections.

6E – 18ISTEERING WHEEL AND COLUMN
DAEWOO V–121 BL4
6. Connect the ignition switch electrical connection.
7. Connect the airbag electrical connections.
8. Install the switch levers. Refer to ”Turn Signal
Switch and Lever” and ”Wiper Switch and Lever” in
this section.
9. Install the immobilizer module. Refer to Section 9T,
Remote Keyless Entry and Anti–theft System.
10. Install the lower instrument trim panels. Refer to
Section 9E, Instrumentation/Driver Information.
11. Install the upper and the lower steering column cov-
er panel with the screws..
Tighten
Tighten the upper and the lower steering column pan-
el screws to 2.5 NSm (22 lb–in).
12. Inspect the steering wheel in a straight–ahead posi-
tion. Refer to Section 6C, Power Steering Gear.
13. Connect the negative battery cable.

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 mujst be also be in LOCK unless otherwise noted
TABLE OF CONTENTS
SPECIFICATIONS8B–3 . . . . . . . . . . . . . . . . . . . . . . . . . .
General Specifications 8B–3. . . . . . . . . . . . . . . . . . . . .
Fastener Tightening Specifications 8B–3. . . . . . . . . . .
SPECIAL TOOLS8B–3 . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS TABLE 8B–3. . . . . . . . . . . . . . . . . . .
SCHEMATIC AND ROUTING DIAGRAMS8B–4 . . . . .
Supplemental Inflatable Restraints(SIR)
Electronical Schematic 8B–4. . . . . . . . . . . . . . . . . . . .
SIR Component Locator 8B–5. . . . . . . . . . . . . . . . . . . .
DIAGNOSIS8B–6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Trouble Code (DTC) 8B–6. . . . . . . . . . . . . .
Scan Tool Diagnostics 8B–7. . . . . . . . . . . . . . . . . . . . . .
SIR Diagnostic System Check 8B–8. . . . . . . . . . . . . . .
Sensing and Diagnostic Module (SDM) Integrity
check 8B–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 1 Driver Airbag Deployment Loop Resistance
Is High 8B–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 2 Driver Airbag Deployment Loop Resistance
Is Low 8B–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 3 Driver Airbag Deployment Loop Is Shorted
To Ground 8B–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 4 Driver Airbag Deployment Loop Is Shorted
To Power 8B–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 5 Passenger Airbag Deployment Loop
Resistance Is High 8B–20. . . . . . . . . . . . . . . . . . . . . .
DTC 6 Passenger Airbag Deployment Loop
Resistance Is Low 8B–22. . . . . . . . . . . . . . . . . . . . . .
DTC 7 Passenger Airbag Deployment Loop Is
Shorted To Ground 8B–24. . . . . . . . . . . . . . . . . . . . . .
DTC 8 Passenger Airbag Deployment Loop Is
Shorted To Power 8B–26. . . . . . . . . . . . . . . . . . . . . . .
DTC 9 Driver Belt Pretensioner Deployment
Loop Resistance Is High 8B–28. . . . . . . . . . . . . . . . .
DTC 10 Driver Belt Pretensioner Deployment
Loop Resistance Is Low 8B–30. . . . . . . . . . . . . . . . . .
DTC 11 Driver Belt Pretensioner Deployment
Loop Is Shorted To Ground 8B–32. . . . . . . . . . . . . . . DTC 12 Driver Belt Pretensioner Deployment
Loop Is Shorted To Power 8B–34. . . . . . . . . . . . . . . .
DTC 13 Passenger Belt Pretensioner Deployment
Loop Resistance Is High 8B–36. . . . . . . . . . . . . . . . .
DTC 14 Passenger Belt Pretensioner Deployment
Loop Resistance Is Low 8B–38. . . . . . . . . . . . . . . . . .
DTC 15 Passenger Belt Pretensioner Deployment
Loop Is Shorted To Ground 8B–40. . . . . . . . . . . . . . .
DTC 16 Passenger Belt Pretensioner Deployment
Loop Is Shorted To Power 8B–42. . . . . . . . . . . . . . . .
DTC 23 Battery Voltage high 8B–44. . . . . . . . . . . . . . .
DTC 24 Battery Voltage Low 8B–46. . . . . . . . . . . . . . .
DTC 25 Airbag Warning Lamp Failure 8B–48. . . . . . .
DTC 31 Internal Sensing Diagnostic Module
(SDM) Failure 8B–50. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 32 Airbag Inflation Record By Frontal
Collision 8B–51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 33 Driver Side Airbag Inflation Record By
Side Impact 8B–52. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 34 Passenger Side Airbag Inflation Record
By Side Impact 8B–53. . . . . . . . . . . . . . . . . . . . . . . . .
DTC 35 Belt Pretensioner Explosion Record 8B–54. .
DTC 38 Side Airbag And Belt Pretensioner
Explosion Count Over 5 8B–55. . . . . . . . . . . . . . . . . .
DTC 52 Driver Side Airbag Deployment Loop
Resistance Is High 8B–56. . . . . . . . . . . . . . . . . . . . . .
DTC 53 Driver Side Airbag Deployment Loop
Resistance Is Low 8B–58. . . . . . . . . . . . . . . . . . . . . .
DTC 54 Driver Side Airbag Deployment Loop Is
Shorted To Ground 8B–60. . . . . . . . . . . . . . . . . . . . . .
DTC 55 Driver Side Airbag Deployment Loop Is
Shorted To Power 8B–62. . . . . . . . . . . . . . . . . . . . . . .
DTC 56 Passenger Side Airbag Deployment Loop
Resistance Is High 8B–64. . . . . . . . . . . . . . . . . . . . . .
DTC 57 Passenger Side Airbag Deployment Loop
Resistance Is Low 8B–66. . . . . . . . . . . . . . . . . . . . . .
DTC 58 Passenger Side Airbag Deployment Loop
Is Shorted To Ground 8B–68. . . . . . . . . . . . . . . . . . . .
DTC 59 Passenger Side Airbag Deployment Loop
Is Shorted To Power 8B–70. . . . . . . . . . . . . . . . . . . . .

8B – 2ISUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO V–121 BL4
DTC 80 Driver Side Airbag Sensor Loop Is
Shorted To Power 8B–72. . . . . . . . . . . . . . . . . . . . . . .
DTC 81 Driver Side Airbag Sensor Loop Is
Shorted To Ground 8B–74. . . . . . . . . . . . . . . . . . . . . .
DTC 82 Driver Side Airbag Sensor Communication
Error 8B–76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 83 Driver Side Airbag Sensor Failure 8B–78. . .
DTC 84 Passenger Side Airbag Sensor Loop Is
Shorted To Power 8B–80. . . . . . . . . . . . . . . . . . . . . . .
DTC 85 Passenger Side Airbag Sensor Loop Is
Shorted To Ground 8B–82. . . . . . . . . . . . . . . . . . . . . .
DTC 86 Passenger Side Airbag Sensor
Communication Error 8B–84. . . . . . . . . . . . . . . . . . . .
DTC 87 Passenger Side Airbag Sensor Failure 8B–86
MAINTENANCE AND REPAIR8B–88 . . . . . . . . . . . . . .
ON–VEHICLE SERVICE 8B–88. . . . . . . . . . . . . . . . . . . .
Disabling the Supplemental Inflatable
Restraints(SIR) 8B–88. . . . . . . . . . . . . . . . . . . . . . . . .
Enabling the Supplemental Inflatable
Restraints(SIR) 8B–88. . . . . . . . . . . . . . . . . . . . . . . . .
Handling, Installation and Diagnosis 8B–89. . . . . . . . .
Repairs and Inspections Required After an
Accident 8B–89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accident With Deployment Components
Replacements 8B–90. . . . . . . . . . . . . . . . . . . . . . . . . . Accident Without Deployment Component
Inspection 8B–90. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sensing and Diagnostic Module (SDM) 8B–90. . . . . .
Driver Airbag Module 8B–91. . . . . . . . . . . . . . . . . . . . . .
Clock Spring 8B–92. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock Spring Alignment 8B–93. . . . . . . . . . . . . . . . . . . .
Passenger Airbag Module 8B–94. . . . . . . . . . . . . . . . . .
Side Airbag Sensor 8B–95. . . . . . . . . . . . . . . . . . . . . . .
Front Seat Belt Pretensioner 8B–95. . . . . . . . . . . . . . .
Airbag Module Deployment (Inside of Vehicle) 8B–95
Airbag Module Deployment (Outside of Vehicle) 8B–97
Deployed Airbag Module Disposal Procedure 8B–98.
SIR Wiring Repair 8B–99. . . . . . . . . . . . . . . . . . . . . . . .
GENERAL DESCRIPTION AND SYSTEM
OPERATION8B–100 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supplemental Inflatable Restraints(SIR) 8B–100. . . .
Airbag Modules 8B–100. . . . . . . . . . . . . . . . . . . . . . . . . .
Front Seat Belt Pretensioners 8B–101. . . . . . . . . . . . .
Sensing and Diagnostic Module (SDM) 8B–101. . . . .
Airbag Warning Lamp 8B–101. . . . . . . . . . . . . . . . . . . .
Clock Spring 8B–101. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Harness Connectors 8B–102. . . . . . . . . . . . . . .

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 3
DAEWOO V–121 BL4
SPECIFICATIONS
GENERAL SPECIFICATIONS
ApplicationDescription
Airbag System Deployment Time<20ms
Detection Time<5ms
Operating Temperature–40°C~+85°C
Storage Temperature–40°C~+90°C
Voltage Range9~16 V
Current consumption5ms after ignition switch ON <1A
5ms
5sec<300Ma, after 5sec.<100Ma
Acceleration Range+/– 50g
Maximum Acceleration+/– 600g pulse
Voltage Ramp0.2~2.0 V/s
Energy Reservation150ms after battery disconnection
Inflator Ignition Energy4.3mj
Squib Resistance2.15 +/– 0.35Ω
Airbag Warning Lamp ON Time(When Ignition ON)6sec
FASTENER TIGHTENING SPECIFICATIONS
ApplicationN·mLb–FtLb–In
Clock Spring Retaining Screws3–27
Driver Airbag Module Mounting Bolts11–97
Passenger Airbag Module Mounting Bolts8–71
Sensing and Diagnostic Module(SDM) Mounting Bolts10–89
SPECIAL TOOLS
SPECIAL TOOLS TABLE
Scan Tool

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 5
DAEWOO V–121 BL4
SIR COMPONENT LOCATOR
1. Driver Airbag Module
2. Clock Spring
3. Sensing And Diagnostic Module(SDM)4. Passenger Airbag Module
5. Side Airbag Module
6. Side Airbag Sensor

8B – 6ISUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO V–121 BL4
DIAGNOSIS
DIAGNOSTIC TROUBLE CODE (DTC)
When the sensing and diagnostic module (SDM) detects
any problem it illuminates the airbag warning indicator and
stores the diagnostic trouble codes (DTCs).
The supplemental inflatable restraints (SIR) diagnostic
system check must be always the starting point for any
SIR diagnosis. The diagnostic system check reveals diag-
nostic trouble codes (DTCs) through the use of scan tool.
It also checks for proper airbag warning lamp operation.
The two types of DTCs that may be recorded are as fol-lows :
1. Active DTCs represent malfunction being detected
during the current ignition cycle. Active DTCs are
stored in random access memory (RAM).
2. Historic DTCs represent malfunctions detected sin-
cethe last time the historic memory was cleared.
Historic DTCs are stored in the electrically erasable
programmable read–only memory (EPROM).
Diagnostic Trouble Code Table
DTCDescription
1Driver Airbag Deployment Loop Resistance Is High
2Driver Airbag Deployment Loop Resistance Is Low
3Driver Airbag Deployment Loop Is Shorted To Ground
4Driver Airbag Deployment Loop Is Shorted To Power
5Passenger Airbag Deployment Loop Resistance Is High
6Passenger Airbag Deployment Loop Resistance Is Low
7Passenger Airbag Deployment Loop Is Shorted To Ground
8 Passenger Airbag Deployment Loop Is Shorted To Power
9Driver Belt Pretensioner Deployment Loop Resistance Is High
10Driver Belt Pretensioner Deployment Loop Resistance Is Low
11Driver Belt Pretensioner Deployment Loop Is Shorted To Ground
12 Driver Belt Pretensioner Deployment Loop Is Shorted To Power
13Passenger Belt Pretensioner Deployment Loop Resistance Is High
14Passenger Belt Pretensioner Deployment Loop Resistance Is Low
15Passenger Belt Pretensioner Deployment Loop Is Shorted To Ground
16Passenger Belt Pretensioner Deployment Loop Is Shorted To Power
23Battery Voltage High
24 Battery Voltage Low
25 Airbag Warning Lamp Failure
31Internal Sensing Diagnostic Module(SDM) Failure
32 Airbag Inflation Record By Frontal Collision
33 Driver Side Airbag Inflation Record By Side Impact
34Passenger Side Airbag Inflation Record By Side Impact
35Belt Pretensioner Explosion Record
38Side Airbag And Belt Pretensioner Explosion Count Over 5
52 Driver Side Airbag Deployment Loop Resistance Is High
53Driver Side Airbag Deployment Loop Resistance Is Low
54Driver Side Airbag Deployment Loop Is Shorted To Ground
55 Driver Side Airbag Deployment Loop Is Shorted To Power
56Passenger Side Airbag Deployment Loop Resistance Is High

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 7
DAEWOO V–121 BL4
DTC Description
57Passenger Side Airbag Deployment Loop Resistance Is Low
58Passenger Side Airbag Deployment Loop Is Shorted To Ground
59Passenger Airbag Deployment Loop Is Shorted To Power
80Driver Side Airbag Sensor Loop Is Shorted To Power
81Driver Side Airbag Sensor Loop Is Shorted To Ground
82Driver Side Airbag Sensor Communication Error
83Driver Side Airbag Sensor Failure
84Passenger Side Airbag Sensor Loop Is Shorted To Power
85Passenger Side Airbag Sensor Loop Is Shorted To Ground
86Passenger Side Airbag Sensor Communication Error
87Passenger Side Airbag Sensor Failure
SCAN TOOL DIAGNOSTICS
A scan tool can read serial data from terminal 13 of the
data link connector(DLC). The scan tool is used to read
diagnostic trouble codes(DTCs), and to clear some DTCs
after a repair is completed. By design, DTC 51 can not becleared. And the DTC 61 can not be cleared for the ignition
cycle once the DTC has been detected by the SDM.
To use the scan tool, turn the ignition OFF, connect the
scan tool to the DLC, and turn the ignition switch to ON.
Follow the instructions in the scan tool manual. The SDM
sends serial data from terminal 9 of the SDM to terminal
13 of the DLC.