2004 DAEWOO LACETTI Lamp

8B – 52ISUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO V–121 BL4
J3B18B03
LT BLU
LT BLU
”13” Ter.
DLC
(Data Link Connector) YEL YEL
10A
1C207 PNKPNKPNK
BLK/
WHTBRN
SDM F1
Hot in Run and Start
3
65
97 17
10A F4
32
B15
B7A19 31C201
G202
C207 4
DIAGNOSTIC TROUBLE CODE (DTC) 33
DRIVER SIDE AIRBAG INFLATION RECORD BY SIDE
IMPACT
Circuit Description
When the ignition switch is turned to ON, the sensing and
diagnostic module(SDM) will perform turn–on test to diag-
nose critical malfunctions within SDM itself.
In case of driver side airbag inflation by side impact, the
SDM maintains warning lamp”ON” and then all the airbag
system should be checked including pretensioners andalso side airbag sensor, wiring should be replaced. In
case, the driver side airbag inflation by side impact counts
over 5, the SDM should also be replaced.
DTC 33 Will Set When
S The history of airbag inflation or belt pretensioner
explosion is in the SDM.
DTC 33
Driver Side Airbag Inflation Record By Side Impact
CAUTION : The sensing and diagnostic module(SDM)
can maintain sufficient voltage to deploy the airbags
and pretensioners for 1 minute after the ignition is
OFF and the fuse has been removed. If the airbags
and pretensioners are not disconnected, do not be-
gin service until one minute has passed after discon-
necting power to SDM. Otherwise, injury could result.
CAUTION : During service procedure, be very carefulwhen handling the SDM. Never strike or jar the SDM.
Never power the supplemental inflatable re-
straints(SIR) when the SDM is not rigidly attached to
the vehicle. All SDM mounting bolts must be carefully
tightened , and the arrow on the SDM must be point
toward the front of the vehicle to ensure proper op-
eration of the SIR. The SDM could be activated if it is
powered when it is not rigidly attached to the vehicle,
resulting in unexpected deployment and possible in-
jury.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 53
DAEWOO V–121 BL4
J3B18B03
LT BLU
LT BLU
”13” Ter.
DLC
(Data Link Connector) YEL YEL
10A
1C207 PNKPNKPNK
BLK/
WHTBRN
SDM F1
Hot in Run and Start
3
65
97 17
10A F4
32
B15
B7A19 31C201
G202
C207 4
DIAGNOSTIC TROUBLE CODE (DTC) 34
PASSENGER SIDE AIRBAG INFLATION RECORD BY
SIDE IMPACT
Circuit Description
When the ignition switch is turned to ON, the sensing and
diagnostic module(SDM) will perform turn–on test to diag-
nose critical malfunctions within SDM itself.
In case of passenger side airbag inflation by side impact,
the SDM maintains warning lamp ”ON” and then all the air-
bag system should be checked including pretensionersand also side airbag sensor, wiring should be replaced. In
case, the passenger side airbag inflation by side impact
counts over 5, the SDM should also be replaced.
DTC 34 Will Set When
S The history of passenger side airbag inflation or belt
pretensioner explosion is in the SDM.
DTC 34
Passenger Side Airbag Inflation Record By Side Impact
CAUTION : The sensing and diagnostic module(SDM)
can maintain sufficient voltage to deploy the airbags
and pretensioners for 1 minute after the ignition is
OFF and the fuse has been removed. If the airbags
and pretensioners are not disconnected, do not be-
gin service until one minute has passed after discon-
necting power to SDM. Otherwise, injury could result.
CAUTION : During service procedure, be very carefulwhen handling the SDM. Never strike or jar the SDM.
Never power the supplemental inflatable re-
straints(SIR) when the SDM is not rigidly attached to
the vehicle. All SDM mounting bolts must be carefully
tightened , and the arrow on the SDM must be point
toward the front of the vehicle to ensure proper op-
eration of the SIR. The SDM could be activated if it is
powered when it is not rigidly attached to the vehicle,
resulting in unexpected deployment and possible in-
jury.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 101
DAEWOO V–121 BL4
FRONT SEAT BELT
PRETENSIONERS
CAUTION : Tempering with seat belt pretensioner
creates the risk of an injury from unexpected deploy-
ment. Therefore, the driver airbag module should
never be disassembled.
The seat belt pretensioners(with load limiter for some ve-
hicles) are assembled with each front seat belt retractors
to retract the seat belt webbing when accounted frontal
collision. The seat belt pretensioners are controlled by
sensing and diagnostic module(SDM). The seat belt pre-
tensioner contains an igniter charge and a gas generator
to pull the seat belt webbing. The seat belt pretensioner
must be replaced after an accident that causes its activa-
tion.
The seat belt pretensioner also contains a shorting bar to
prevent current from travelling through the seat belt pre-
tensioner during servicing. The shorting bar is disengaged
when the connector is connected.
SENSING AND DIAGNOSTIC
MODULE (SDM)
CAUTION : During the service procedures, be careful
when handling the SDM. Never shake or jar the SDM.
Never apply power to SIR when the SDM is not rigidly
attached to the vehicle. All SDM mounting bolts and
grounding nuts must be fully tightened. Failure to fol-
low these precautions could cause deployment and
result in personal injury.
The SDM is located on the floor beneath the floor console
assembly. The SDM performs the following functions :
S Monitors the supplemental inflatable restraints(SIR)
electrical components and sets a diagnostic trouble
code(DTC) when malfunction is detected.
S Records any faults that are discovered.
S Displays SIR diagnostic trouble codes and system
status information when connected to a scan tool.
S Illuminates the airbag indicator to alert the driver to
any fault.S Provides a reserve power source to deploy the air-
bags and pretensioners if an accident has disabled
the normal power source.
S Monitors vehicle velocity changes to detect frontal
impacts, which are severe enough to warrant de-
ployment.
S Causes current to flow through the airbag modules
and pretensioner to cause deployment if a frontal
impact of sufficient force is detected.
The SDM contains no user–serviceable parts.
AIRBAG WARNING LAMP
The instrument cluster contains an airbag warning indica-
tor and sensing and diagnostic module(SDM). The SDM
performs a turn–on test when the ignition is turned ON.
The SDM flashes the airbag indicator seven times by sup-
plying an intermittent ground to the indicator lamp circuit.
After flashing seven times, the airbag indicator will turn off
if no more malfunctions have been detected.
If the SDM has detected malfunctions in the internal and
external circuits, which could potentially affect the opera-
tion of the supplemental inflatable restraints(SIR), the air-
bag indicator stays on. Some malfunctions could result in
non–deployment when necessary or deployment under
conditions which would not normally result in deployment.
When the SDM is not properly attached to its connector,
the airbag circuit is shorted to ground because there is a
shorting bar in the SDM electrical connector. The shorting
bar is disengaged when proper connection is made, but if
a poor connection exists the SDM connector supplied a
ground to the airbag indicator independently of the SDM,
and the airbag indicator turns on.
CLOCK SPRING
CAUTION : Disassembling the clock spring can cause
injury or cause the clock spring to malfunction.
CAUTION : Over–rotating the clock spring (over 3 and
one quarter turns to one direction) without the steer-
ing wheel in position could damage the clock spring
and result in an inoperative driver airbag.
There is a coil assembly in the steering which is referred
to as a clock spring because of its internal resemblance to
the type of spring used in a mechanical clock. The coil

8B – 102ISUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO V–121 BL4
spring should never be disassembled, and there is no
timekeeping function. The clock spring contains two or
three current–carrying coils. One of the current–carrying
coils maintains continuous contact within the driver de-
ployment loop while the steering wheel is rotated. The
clock spring also contains coils that maintain continuous
contact for horn and remote audio control switch circuit.
Turning the steering wheel in one direction tightens the
coil, and turning the steering wheel in the opposite direc-
tion loosens the coil. Do not turn the clock spring when the
steering wheel is not attached. Refer to ”Clock Spring” in
this section for proper installation of the clock spring.
The clock spring also includes the wiring and the connec-
tors for the horn circuit and the driver airbag circuit. A yel-
low two–way connector on the lower steering column is at-
tached to the clock spring wiring. The yellow connector to
the airbag contains a shorting bar which connects the driv-
er high circuit to driver low circuit when the connector is
disconnected.
The shorting bar prevents current from travelling through
the driver airbag module during servicing. The shorting bar
is disengaged when the clock spring connector is con-
nected.WIRING HARNESS CONNECTORS
If the sensing and diagnostic module (SDM) electrical con-
nector is not attached properly, a built in shorting bar will
connect the wire from airbag warning lamp with the SDM
ground wire. This turns on the airbag indicator . To prevent
deployment during servicing, additional shorting bars are
located in following locations :
S The clock spring electrical connector at the lower
steering column.
S The passenger airbag module.
S The driver airbag module.
S The seat belt pretensioners.
The shorting bar is only a backup safety device. Always
disable the supplemental inflatable restraints(SIR) before
beginning any service procedure.

BODY WIRING SYSTEM 9A – 13
DAEWOO V–121 BL4
FUSE CHART
Engine Room Fuse Block
FuseRating/SourceCircuit
EF130AB+Battery Main (F13~F16, F21~F24)
EF260AB+EBCM, Oil Feeding Connector
EF330AB+Blower Relay
EF430AB+Ignition Switch–2
EF530AB+Ignition Switch–1
EF620AB+Cooling Fan Low Relay
EF730AB+Defog Relay
EF830AB+Cooling Fan HI Relay
EF920AIGN 2Power Window Switch
EF1015AIGN 1Fuel Connector, ECM (MR–140), LEGR, EI Sys-
tem
EF1110AB+ECM, Main Relay (Sirius D4)
EF1225AB+Head Lamp Relay, ILLUM. Relay
EF1315AB+Brake Switch
EF1420AIGN 2Power Window Switch
EF1515ALightHead Lamp HI
EF1615AB+Horn Relay, Siren, Hood Contact Switch
EF1710AB+A/C Comp. Relay
EF1815AIGN 1Fuel Pump
EF1915AB+Cluster, Key Remind S/W, Folding Mirror Unit,
MAP Lamp, Room Lamp, Trunk Open Lamp,
Trunk Open S/W
EF2010ALightHead Lamp Low
EF2115AIGN 1/B+EVAP Canister Purge Solenoid, HO2S, Cooling
Fan Relay
EF2215AIGN 1/B+Injector, EGR, EEGR
EF2310AIlluminationLicense Plate Lamp, Chime Bell, Tail Lamp,
Head Lamp
EF2415AB+Fog LampRelay
EF2510AIGN 2Electric OSRV Mirror
EF2615AB+Central Door Lock Unit
EF2710ALightHead Lamp Low
EF2810AIlluminationILLUM. Circuit, Head Lamp, Tail Lamp
EF2910ASpareNot Used
EF3015ASpareNot Used
EF3125ASpareNot Used

9A – 14IBODY WIRING SYSTEM
DAEWOO V–121 BL4
I/P Fuse Block
FuseRating/SourceCircuit
F110AIGN 1SDM
F210AIGN 1TCM, ECM, Generator, VGIS, VSS
F315AIGN 1Hazard Switch
F410AIGN 1Cluster, DRL Module, Chime Bell, Brake Switch,
SSPS Module, A/C Control Switch
F5–Spare–
F610AIGN 2A/C Comp. Relay, Defog Relay, Power Window
Relay, Head Lamp Relay
F720AIGN 2Blower Relay, A/C Control Switch, FATC
F815AIGN 2Electric Mirror Switch, Folding Mirror, Sun Roof
Module
F925AIGN 1Wiper Motor, Wiper Switch
F10–Spare–
F1110AIGN 1EBCM, Oil Feeding Connector
F1210AIGN 1Immobilizer, Anti Theft Control Unit, Rain Sensor
Unit
F1310AB+TCM
F1415AB+Hazard Switch
F1515AB+Anti Theft Control Unit
F1610AB+DLC
F1710AACCAudio, Clock
F1815AACCExtra Power Jack
F1915AACCCigar Lighter
F2010AIGN 1Reverse Lamp Switch, PNP Switch
F2115AB+Rear Fog Relay
F2215AB+Clock, FATC, A/C Control Switch
F2315AB+Audio
F2410AB+Immobilizer

SECTION : 9B
LIGHTING SYSTEMS
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 LOCK unless otherwise noted.
TABLE OF CONTENTS
SPECIFICATIONS9B–2 . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb Usage Chart 9B–2. . . . . . . . . . . . . . . . . . . . . . . . . .
Fastener Tightening Specifications 9B–2. . . . . . . . . . .
SCHEMATIC AND ROUTING DIAGRAMS9B–3 . . . . .
Backup Lamps Circuit 9B–3. . . . . . . . . . . . . . . . . . . . . .
Instruments Circuit (W/O Dimmer Control :
General Only) 9B–4. . . . . . . . . . . . . . . . . . . . . . . . . . .
Instruments Circuit (W/ Dimmer Control) 9B–5. . . . . .
Front And Rear Fog Lamps Circuit 9B–6. . . . . . . . . . .
Headlamps–On Reminder Chime Circuit 9B–7. . . . . .
Headlamps and Headlamp Leveling Circuit 9B–8. . . .
Daytime Running Lamps Circuit 9B–9. . . . . . . . . . . . .
Parking, Tail and License Lamps Circuit 9B–10. . . . . .
Stoplamps Circuit 9B–11. . . . . . . . . . . . . . . . . . . . . . . . .
Turn and Hazard Lamps Circuit 9B–12. . . . . . . . . . . . .
Interior Courtesy and Luggage Compartment Lamp
Circuit 9B–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIAGNOSIS9B–14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlamps–On Reminder Chime 9B–14. . . . . . . . . . .
Headlamps 9B–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlamp Leveling 9B–20. . . . . . . . . . . . . . . . . . . . . . .
Daytime Running Lamps 9B–22. . . . . . . . . . . . . . . . . . .
Parking Lamps and Taillamps 9B–23. . . . . . . . . . . . . .
Interior Courtesy and Luggage Compartment
Lamps 9B–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog Lamps 9B–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE AND REPAIR9B–36 . . . . . . . . . . . . . .
ON–VEHICLE SERVICE 9B–36. . . . . . . . . . . . . . . . . . . . Headlamps/Front Turn Signal Lamps 9B–36. . . . . . . .
Daytime Running Lamp Module 9B–37. . . . . . . . . . . . .
Parking Lamps 9B–37. . . . . . . . . . . . . . . . . . . . . . . . . . .
Side Turn Signal Lamps 9B–38. . . . . . . . . . . . . . . . . . .
Front Fog Lamps 9B–38. . . . . . . . . . . . . . . . . . . . . . . . .
Notchback Rear Combination Lamps 9B–39. . . . . . . .
Hatchback Rear Combination Lamps 9B–40. . . . . . . .
Hatchback Extension Lamps 9B–40. . . . . . . . . . . . . . .
Notchback Center High–Mounted Stoplamp 9B–41. .
Hatchback Center High–Mounted Stoplamp 9B–41. .
License Plate Lamps 9B–42. . . . . . . . . . . . . . . . . . . . . .
Door Jamb Switch 9B–42. . . . . . . . . . . . . . . . . . . . . . . .
Center Room Lamp 9B–43. . . . . . . . . . . . . . . . . . . . . . .
Map Lamp 9B–43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Luggage Compartment Lamp 9B–44. . . . . . . . . . . . . . .
Ashtray and Cigar Lighter Lamp 9B–44. . . . . . . . . . . .
GENERAL DESCRIPTION AND SYSTEM
OPERATION9B–46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlamps–On Reminder Chime 9B–46. . . . . . . . . . .
Headlamps 9B–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Daytime Running Lamps 9B–46. . . . . . . . . . . . . . . . . . .
Parking and Turn Signal Lamps 9B–46. . . . . . . . . . . . .
Fog Lamps 9B–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Combination Lamps 9B–46. . . . . . . . . . . . . . . . . .
License Plate Lamp 9B–46. . . . . . . . . . . . . . . . . . . . . . .
Interior Courtesy Lamp 9B–46. . . . . . . . . . . . . . . . . . . .
Luggage Compartment Lamp 9B–46. . . . . . . . . . . . . . .
Backup Lamps 9B–47. . . . . . . . . . . . . . . . . . . . . . . . . . .

9B – 2ILIGHTING SYSTEMS
DAEWOO V–121 BL4
SPECIFICATIONS
BULB USAGE CHART
BulbReplacement Bulb Number
Backup Lamp21W
Center High–Mounted Stoplamp5W
Front Fog Lamp27W
Headlamp55W
Interior Courtesy Lamp10W
License Plate Lamp5W
Luggage Compartment Lamp10W
Park and Front Turn Signal LampDouble 21/5W
Rear Fog Lamp21W
Rear Turn Signal Lamp21W
Side Turn Signal Lamp5W
Taillamp and StoplampDouble 21/5W
FASTENER TIGHTENING SPECIFICATIONS
ApplicationNSmLb–FtLb–In
CHMSL Mounting Nuts4–35
Door Jamb Switch Screw4–35
Front Fog Lamp Nuts4–35
Headlamp Assembly Bolts and Nuts4–35
License Plate Lamp Screws4–35
Map Lamp Screws1.5–13
Rear Combination Lamp Assembly Screws4–35
Hatchback Extension Lamp3–27