service DAEWOO LACETTI 2004 Service Repair Manual

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 79
DAEWOO V–121 BL4
DTC 83
Driver Side Airbag Sensor Failure
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 careful
when 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.
Step
ActionValue(s)YesNo
11. Confirm the ignition switch ”OFF”.
2. Wait for a minute the SDM charger to be dis-
charged.
3. Visually check any damage for the driver side
airbag sensor wiring and the connector. Are the
airbag wiring and connector damaged?–Go to Step 2Go toStep 3
2Replace the wiring of airbag sensor.–––
3Replace the driver side airbag sensor.–––

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 81
DAEWOO V–121 BL4
DTC 84
Passenger Side Airbag Sensor Loop Is Shorted To
Power
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 careful
when 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.
Step
ActionValue(s)YesNo
11. Confirm the ignition switch ”OFF”.
2. Wait for a minute the SDM charger to be dis-
charged.
3. Visually check any damage for the passenger
side airbag sensor wiring and the connector.
Are the airbag wiring and connector damaged?–Go to Step 3Go to Step 2
2Repair and reconnect the circuit. Check the circuit
again.–––
3Check the resistance between the SDM and the
high, low terminal of passenger side airbag sensor
and the battery. Is the resistance 10KΩ?
10K ΩGo to Step 5Go to Step 4
4Replace the airbag wiring.–––
51. Replace the SDM.
2. Confirm the ignition switch ”ON”.
3. Remove the DTC with scan tool.
4. Check the circuit. Is the DTC still exist?–Go to Step 6The system is
OK.
6Replace the passenger side airbag sensor.–––

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 83
DAEWOO V–121 BL4
DTC 85
Passenger Side Airbag Sensor Loop Is Shorted To
Ground
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 careful
when 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.
Step
ActionValue(s)YesNo
11. Confirm the ignition switch ”OFF”.
2. Wait for a minute the SDM charger to be dis-
charged.
3. Visually check any damage for the passenger
side airbag sensor wiring and the connector.
Are the airbag wiring and connector damaged
OK?–Go to Step 3Go to Step 2
2Replace the airbag wiring and connect the connec-
tor.–––
3Check the resistance between the SDM and the
high, low terminal of passenger side airbag sensor
and the ground. Is the resistance 10KΩ?
10K ΩGo to Step 4Go to Step 6
41. Replace the SDM.
2. Confirm the ignition switch ”ON”.
3. Remove the DTC with scan tool.
4. Check the circuit. Is the DTC still exist?–Go to Step 5The system is
OK.
5Replace the passenger side airbag sensor.–––
6Replace the airbag wiring.–––

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 85
DAEWOO V–121 BL4
DTC 86
Passenger Side Airbag Sensor Communication Error
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 careful
when 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.
Step
ActionValue(s)YesNo
11. Confirm the ignition switch ”OFF”.
2. Wait for a minute the SDM charger to be dis-
charged.
3. Visually check any damage for the passenger
side airbag sensor wiring and the connector.
Are the airbag wiring and connector OK?–Go to Step 3Go to Step 2
2Replace the airbag wiring and connect the connec-
tor.–––
31. Replace the passenger side airbag sensor.
2. Confirm the ignition switch ”ON”.
3. Remove the DTC with scan tool.
4. Check the circuit. Is the DTC still exist?–Go to Step 4The system is
OK.
4Replace the SDM.–––

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 87
DAEWOO V–121 BL4
DTC 87
Passenger Side Airbag Sensor Failure
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 careful
when 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.
Step
ActionValue(s)YesNo
11. Confirm the ignition switch ”OFF”.
2. Wait for a minute the SDM charger to be dis-
charged.
3. Visually check any damage for the passenger
side airbag sensor wiring and the connector.
Are the airbag wiring and connector OK?–Go to Step 3Go to Step 2
2Replace the airbag wiring and connect the connec-
tor.–––
3Replace the passenger side airbag sensor.–––

8B – 88ISUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO V–121 BL4
MAINTENANCE AND REPAIR
ON–VEHICLE SERVICE
SERVICE PRECAUTION
CAUTION : The sensing and diagnostic mod-
ule(SDM) can maintain sufficient voltage to
deploy the airbags and pretensioners for 1 min-
ute after the ignition is OFF and the fuse has been
removed. If the airbags and pretensioners are not
disconnected, do not begin service until one
minute has passed after disconnecting power to
SDM. If the airbags are disconnected, service can
be excuted immediately without waiting for one–
minute time period to expire. Failure to tempo-
rarily disable the SIR during service can result in
unexpected deployment, personal injury and un-
necessary SIR repairs.
DISABLING THE SUPPLEMENTAL
INFLATABLE RESTRAINTS(SIR)
1. Turn the steering wheel to the straight–ahead posi-
tion.
2. Turn the ignition switch to LOCK and remove the
key.
3. Remove the airbag fuse F1 in the I/P fuse block
and wait more than one minute for SIR capacitor to
discharge.
ENABLING THE SUPPLEMENTAL
INFLATABLE RESTRAINTS(SIR)
1. Insert the airbag fuse F8 in the I/P fuse block.
2. Turn the ignition switch to ON and verify that the
airbag indicator flashes seven times and turns OFF.
If it does not operate as described, perform the”
SIR Diagnostic System Check” referring in this sec-
tion.
CAUTION : While turning the ignition switch,
staying well away from the inflator modules, or
personal injury can be occurred.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 89
DAEWOO V–121 BL4
HANDLING, INSTALLATION AND
DIAGNOSIS
S Airbag modules should not be subjected to temper-
ature above 65 degrees Celsius(149 degrees Fahr-
enheit).
S An airbag and SDM should not be used if it has
been dropped from height of 0.9 meters(3 feet) or
greater.
S When an SDM is replaced, it must be oriented with
the arrow on the SDM pointing toward the front of
the vehicle.
S It is very important for the SDM to be installed flat
on the mounting surface, parallel to the vehicle’s
longitudinal axis.
S To avoid setting diagnostic trouble codes(DTCs), do
not apply power to the SIR unless all components
are connected or a diagnostic chart request it.
S The SIR Diagnostic System Check must be the
starting point of any SIR diagnostics. The SIR Diag-
nostic System Check will verify proper airbag indi-
cator operation and will lead you to correct chart to
diagnose any SIR malfunctions. Bypassing these
procedures may result in extended diagnostic time
incorrect parts replacement.
REPAIRS AND INSPECTIONS
REQUIRED AFTER AN ACCIDENT
CAUTION : Any repairs to the vehicle’s structure
must return it to the original production configu-
ration. Deployment requires replacement of
SDM, the inflator modules and a dimensional in-
spection of the steering column.
S If any SIR components are damaged, they must be
replaced. If SIR components mounting points are
damaged, they must be repaired or replaced.
S Never use SIR parts from another vehicle. This
does not include remanufactured parts purchased
from an authorized source.
S Do not attempt to service the SDM, the clock spring
or other airbag modules, these items must be re-
placed if they are defective.
S Verify the part number of replaced airbag modules.
Some inflator modules look identical but contain
different internal components.

8B – 90ISUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO V–121 BL4
ACCIDENT WITH DEPLOYMENT
COMPONENTS REPLACEMENTS
All SIR components must be replaced after frontal
crash involving airbag deployment. After deployment,
a powdery residue may be on the surface of the air-
bag. The powder consists primarily of corn-
starch(used to lubricate the bag as it inflates) and by–
products of the chemical reaction. The sodium
hydroxide then quickly reacts with atmospheric mois-
ture and is converted to sodium bicarbonate(also
known as baking soda). Therefore, it is unlikely that
sodium hydroxide will be present after deployment.
Replace the following SIR components.
CAUTION : Wear gloves and safely glasses dur-
ing the disposal procedure. Refer to ”Deployed
airbag module disposal procedure” in this sec-
tion.
S The SDM
S Airbag modules and pretensioners
S SIR wiring
S Clock spring
ACCIDENT WITHOUT DEPLOYMENT
COMPONENT INSPECTION
Certain inspection must be performed after any
crash, whether the airbag has deployed or not. :
S The steering column must be dimensionally in-
spected.
S Inspect the knee bolsters and mounting points for
distortion, bending and cracking or other damages.
S Inspect the instrument panel(I/P) and steering col-
umn reinforcement plate for distorsion, bending and
cracking or other damage.
S Inspect the I/P braces for distortion, bending and
cracking or other damage.
S Inspect the seat belt and mounting points. Refer to
Section 8A, Seat Belts.
SENSING AND DIAGNOSTIC
MODULE (SDM)
CAUTION : During service procedure, be very
careful when handling the SDM. Never strike or
jar the SDM. Never power the supplemental inflat-
able restraints(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 operation of the SIR. The SDM
could be activated if it is powered when it is not
rigidly attached to the vehicle, resulting in unex-
pected deployment and possible injury.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 91
DAEWOO V–121 BL4
Important : If the vehicle interior has been exposed to ex-
tensive water intrusion such as water leaks, driving
through high water, flooding or other causes, then the
SDM and SDM connector may need to be replaced. With
the ignition OFF, inspect the area of SDM, including the
carpet. If any significant soaking or evidence of previous
soaking is detected, the water must be removed, the water
damage repaired and the SDM and SDM connector must
be replaced. Before attempting any of these repairs, the
SRS must be disabled. Refer to ”Disabling the SIR” in this
section.
Removal and Installation Procedure
1. Disable the supplemental inflatable restraints(SIR).
Refer to ”Disabling the SIR” in this section.
2. Remove the floor console. Refer to section 9G, In-
terior Trim.
3. Remove the connector position assurance lock,
which is tethered to SDM connector.
4. Disconnect the SDM electrical connector.
5. Remove the SDM mounting bolts.
6. Remove the SDM.
7. Install the removed parts in the reverse order.
Installation Notice
Tightening torque of SDM mounting bolts is 10 NSm
(89 lb–in).
Enable the SIR. Refer to”Enabling the SIR”
in this section.
CAUTION : All SDM mounting bolts must be care-
fully tightened and the arrow on the SDM must be
pointing toward the front of the vehicle to ensure
proper operation of the SIR. The SDM could be
activated if it is powered while not rigidly at-
tached to the vehicle, resulting in unexpected de-
ployment and possible injury.
0
DRIVER AIRBAG MODULE
Removal and Installation Procedure
1. Disconnect the negative battery cable.
CAUTION : The sensing and diagnostic mod-
ule(SDM) can maintain sufficient voltage to
deploy the airbags and pretensioners for 1 min-
ute after the ignition is OFF and the fuse has been
removed. If the airbags and pretensioners are not
disconnected, do not begin service until one
minute has passed after disconnecting power to
SDM. If the airbags are disconnected, service can
be excuted immediately without waiting for one–
minute time period to expire. Failure to tempo-
rarily disable the SIR during service can result in
unexpected deployment, personal injury and un-
necessary SIR repairs.
2. Remove two driver airbag module mounting bolts
and discard them.

8B – 92ISUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO V–121 BL4
3. Remove the connector from the driver airbag mod-
ule.
4. Remove the driver airbag module.
CAUTION : When handling an airbag module, al-
ways keep the top the unit facing upward. This
leaves room for the airbag to expand if the mod-
ule unexpectedly deploys. Without room for ex-
pansion, a module suddenly propelled toward a
person or object can cause injury or vehicle dam-
age.
5. Installation should follow the removal procedure in
the reverse order.
Installation Notice
Tightening torque of the driver airbag module mount-
ing bolt is 8 NSm (71 lb–in).
CLOCK SPRING
Removal and Installation Procedure
CAUTION : The sensing and diagnostic mod-
ule(SDM) can maintain sufficient voltage to
deploy the airbags and pretensioners for 1 min-
ute after the ignition is OFF and the fuse has been
removed. If the airbags and pretensioners are not
disconnected, do not begin service until one
minute has passed after disconnecting power to
SDM. If the airbags are disconnected, service can
be excuted immediately without waiting for one–
minute time period to expire. Failure to tempo-
rarily disable the SIR during service can result in
unexpected deployment, personal injury and un-
necessary SIR repairs.
1. Disconnect the negative battery cable.
2. Remove the driver airbag module. Refer to ”Driver
airbag module” in this section.
3. Remove the steering wheel. Refer to Section 6E,
Steering Wheel and Column.
4. Remove the screws from the upper and lower
steering column covers. And remove the covers.