2004 DAEWOO LACETTI driver

SEAT BELTS 8A – 3
DAEWOO V–121 BL4
DIAGNOSIS
DRIVER SEAT BELT WARNING
Seat Belt Warning Lamp Does Not Turn On at Any Time
StepActionValue(s)YesNo
1Check the seat belt warning fuse F4.
Is fuse F4 blown?–Go to Step 2Go to Step 3
21. Check for a short circuit and repair if neces-
sary.
2. Replace the fuse.
Is the repair complete?–System OK–
31. Turn the ignition ON.
2. Check the voltage at fuse F4.
Is the voltage equal to the specified value?11–14 vGo to Step 5Go to Step 4
4Repair the open power supply circuit for fuse F4.
Is the repair complete?–System OK–
51. Disconnect the seat belt switch connector (lo-
cated under the driver’s seat).
2. Connect a jumper between the terminals on the
harness side of the seat belt switch connector.
3. Turn the ignition ON.
Does the seat belt warning lamp turn on?–Go to Step 6Go to Step 7
6Replace the seat belt switch.
Is the repair complete?–System OK–
71. Remove the instrument cluster.
2. Check the seat belt warning lamp bulb.
Is the bulb OK?–Go to Step 9Go to Step 8
8Replace the warning lamp bulb.
Is the repair complete?–System OK–
9Repair the open circuit between instrument cluster
terminal A11 and ground.
Is the repair complete?–System OK–

SEAT BELTS 8A – 7
DAEWOO V–121 BL4
Installation Procedure
Notice : Dissimilar metals in direct contact with each other
may corrode rapidly. Make sure to use the correct fasten-
ers to prevent premature corrosion.
1. Install the floor seat belt anchor bolts.
Tighten
Tighten the floor seat belt anchor bolt to 38 NSm (28
lb–ft).
2. Install the rear seat belt retractor bolts (LH, CEN-
TER, RH) on the back panel.
Tighten
Tighten the rear seat belt retractor bolts to 38 NSm (28
lb–ft).
3. Install the rear seat cushion. Refer to Section 9H,
SEATS.
4. Install the back shelf panel. Refer to Section 9G,
Interior Trim.
FRONT SEAT BELT BUCKLE
Removal Procedure
1. Remove the front seat belt bolt and washer.
2. In case of driver seat belt buckle, remove the elec-
trical connector.

8A – 8ISEAT BELTS
DAEWOO V–121 BL4
Installation Procedure
1. Install the front seat belt bolt and washer.
Tighten
Tighten the front seat belt bolt to 42 NSm (31 lb–ft).
2. In case of driver seat belt buckle, connect the elec-
trical connector.

SEAT BELTS 8A – 9
DAEWOO V–121 BL4
GENERAL DESCRIPTION
AND SYSTEM OPERATION
DRIVER SEAT BELT WARNING
The driver’s safety belt incorporates a safety belt reminder
light in the instrument cluster to remind the driver if the
safety belt is not fastened when the the ignition is turned
ON.
THREE–POINT ELR FRONT SEAT
BELT WITH PRETENSIONER
The three–point emergency locking retractor (ELR) front
seat belt pretensioner is always unlocked, allowing the
passenger freedom of movement, except in emergencies
such as rapid deceleration, rapid acceleration, or hard cor-
nering maneuvers.
The front seat belt pretensioner contains an ignitor charge
and a gas generator to inflate the pretensioner. The pre-
tensioner also includes wiring and a connector. The con-
nector of the pretensioner contains a shorting bar which
short–circuits the pretensioner high circuit to the preten-
sioner low circuit when the connector is disconnected. The
shorting bar prevents current from traveling through the
pretensioner during servicing. The shorting bar disen-
gaged when the connecotr is connected.
The pretensioner is an electronically controlled pyrotech-
nical reactor which reduce seat belt slack when it is actived
with air bags.
The front seat belt pretensioner must be replaced after an
accident that cause its activation.
THREE–POINT CLR (ELR) REAR
OUTBOARD SEAT BELT
The rear outboard seating positions use the three–point
child locking retractor (CLR) or emergency locking retrac-
tor (ELR) seat belts. The three–point CLR (ELR) seat beltis always unlocked, allowing the passenger freedom of
movement, except in emergencies such as rapid decel-
eration, rapid acceleration, or hard cornering maneuvers.
OPERATIONAL AND FUNCTIONAL
CHECKS
CAUTION :
S Keep sharp objects and potentially damaging
objects away from the seat belts.
S Avoid bending or damaging any portion of the
buckle or the latch plate.
S Do not bleach or dye the belt webbing. Use
only mild soap and water in order to clean the
belts.
S When installing the seat belt anchor bolts and
the screws, start the bolts and the screws by
hand in order to prevent cross–threading.
S Do not attempt any repairs on the retractor
mechanisms or the covers. Replace any defec-
tive assemblies with new assemblies.
S Replace any belts that are cut or damaged in
any way.
1. Inspect all seat belt anchor bolts and the screws in
order to verify that they are secure.
2. Inspect the seat belt buckle. The buckle must lock
and unlock easily.
3. After inserting the latch into the buckle, tug sharply
on the belt. The buckle must remain locked.
4. Fully extend the shoulder belt portion to make sure
that there is no twisting or tears in the belt.
5. Let the shoulder belt retract fully. The belt should
retract easily.
CHILD SEAT TETHER ANCHOR
For notch back vehicle, there are three child seat tether
anchors located on the read deck lid sill plate. For hatch
back vehicle, there are three child seat fether anchors on
the lower rear tail member in the luggage compartment.
And there are 4 lower child anchors under the rear seat.
4 circular discs on the rear seat indicate the location of the
lower child anchors.

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