Service Manual2006 Nubira-Lacetti MAINTENANCE AND REPAIR

Nubira-Lacetti

MAINTENANCE AND REPAIR

ON-VEHICLE SERVICE

SERVICE PRECAUTION

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 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 temporarily disable the SIR during service can result in unexpected deployment, personal injury and unnecessary SIR repairs.

Disabling the Supplemental Inflatable Restraints(SIR)

Turn the steering wheel to the straight-ahead position.
Turn the ignition switch to LOCK and remove the key.
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)

Insert the airbag fuse F1 in the I/P fuse block.
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 section.

Caution : While turning the ignition switch, staying well away from the inflator modules, or personal injury can be occurred.

Handling, Installation and Diagnosis

Airbag modules should not be subjected to temperature above 65 degrees Celsius(149 degrees Fahrenheit).
An airbag and SDM should not be used if it has been dropped from height of 0.9 meters(3 feet) or greater.
When an SDM is replaced, it must be oriented with the arrow on the SDM pointing toward the front of the vehicle.

It is very important for the SDM to be installed flat on the mounting surface, parallel to the vehicle's longitudinal axis.
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.
The SIR Diagnostic System Check must be the starting point of any SIR diagnostics. The SIR Diagnostic System Check will verify proper airbag indicator 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 configuration. Deployment requires replacement of SDM, the inflator modules and a dimensional inspection of the steering column.

If any SIR components are damaged, they must be replaced. If SIR components mounting points are damaged, they must be repaired or replaced.
Never use SIR parts from another vehicle. This does not include remanufactured parts purchased from an authorized source.
Do not attempt to service the SDM, the clock spring or other airbag modules, these items must be replaced if they are defective.
Verify the part number of replaced airbag modules. Some inflator modules look identical but contain different internal components.

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 airbag. The powder consists primarily of cornstarch(used to lubricate the bag as it inflates) and by-products of the chemical reaction. The sodium hydroxide then quickly reacts with atmospheric moisture 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 during the disposal procedure. Refer to "Deployed airbag module disposal procedure" in this section.

The SDM
Airbag modules and pretensioners
SIR wiring
Clock spring

Accident Without Deployment Component Inspection

Certain inspection must be performed after any crash, whether the airbag has deployed or not. :

The steering column must be dimensionally inspected.
Inspect the knee bolsters and mounting points for distortion, bending and cracking or other damages.
Inspect the instrument panel(I/P) and steering column reinforcement plate for distorsion, bending and cracking or other damage.
Inspect the I/P braces for distortion, bending and cracking or other damage.
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 inflatable 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 unexpected deployment and possible injury.

Important : If the vehicle interior has been exposed to extensive 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

Disable the supplemental inflatable restraints(SIR). Refer to "Disabling the SIR" in this section.
Remove the floor console. Refer to section 9G, Interior Trim.
Remove the connector position assurance lock, which is tethered to SDM connector.
Disconnect the SDM electrical connector.
Remove the SDM mounting bolts.
Remove the SDM.
Install the removed parts in the reverse order.

Installation Notice

Tightening torque of SDM mounting bolts is 10 N•m (89 lb-in).

Enable the SIR. Refer to "Enabling the SIR"

in this section.

Caution : All SDM mounting bolts must be carefully 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 attached to the vehicle, resulting in unexpected deployment and possible injury.

Driver Airbag Module

Removal and Installation Procedure

Disconnect the negative battery cable.

Remove two driver airbag module mounting bolts and discard them.

Remove the connector from the driver airbag module.
Remove the driver airbag module.

Caution : When handling an airbag module, always keep the top the unit facing upward. This leaves room for the airbag to expand if the module unexpectedly deploys. Without room for expansion, a module suddenly propelled toward a person or object can cause injury or vehicle damage.

Installation should follow the removal procedure in the reverse order.

Installation Notice

Tightening torque of the driver airbag module mounting bolt is 8 N•m (71 lb-in).

Clock Spring

Removal and Installation Procedure

Disconnect the negative battery cable.
Remove the driver airbag module. Refer to "Driver airbag module" in this section.
Remove the steering wheel. Refer to Section 6E, Steering Wheel and Column.
Remove the screws from the upper and lower steering column covers. And remove the covers.

Remove the driver side knee bolster or instrument panel lower cover.
Disconnect the driver airbag, horn and connectors from the lower steering column.
Remove the screws and discard them.
Remove the clock spring from the steering shaft.

Installation should follow the removal procedure in the reverse order. Refer to "Clock Spring Alignment" in this section for alignment.

Tightening torque of the clock spring screw is 3 N•m (27 lb-in).

Caution : If the clock spring is not properly aligned, the steering wheel may not be able to rotate completely during a turn. Restricted turning ability can cause the vehicle to crash. Improper alignment of the clock spring also may make the SIR inoperative, preventing the airbag from deploying during crash. Both of the out comes can result in injury.

Clock Spring Alignment

Notice : Turning the clock spring more than three turns clockwise or counterclockwise can damage the spring.

Turn the front wheels straight ahead.
Turn the lobe of clock spring clockwise to lock (Do not force).
Then turn the lobe of clock spring counterclockwise approximately three turns to the neutral position, with the front of the wheels straight ahead.
Properly align the pointed marks on the components of the clock spring.

Passenger Airbag Module

Removal and Installation Procedure

Caution : The sensing and diagnostic module(SDM) can maintain sufficient voltage to deploy the airbags and pretensioners for 1minute 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 temporarily disable the SIR during service can result in unexpected deployment, personal injury and unnecessary SIR repairs.

Disconnect the negative battery cable.
Remove the glove box. Refer to 9E, Instrumentation/Driver Information.
Remove the glove box. Refer to 9E, Instrumentation/Driver Information.
Disconnect the passenger airbag yellow electrical connector. Remove the Instrument panel.
Remove the passenger airbag module by removing the mounting bolts from the airbag bracket.
Installation should follow the removal procedure in the reverse order.

Tightening torque of the passenger airbag module mounting bolt is 11 N•m (97 lb-in).

Side Airbag Sensor

Removal and Installation Procedure

Caution : The sensing and diagnostic module(SDM) can maintain sufficient voltage to deploy the airbags and pretensioners for 1minute 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 executed immediately without waiting for one-minute time period to expire. Failure to temporarily disable the SIR during service can result in unexpected deployment, personal injury and unnecessary SIR repairs.

Disconnect the negative battery cable.
Remove the trim from B pillar.
Remove the side airbag sensor mounting bolts.
Remove the side airbag sensor.
Installation should follow the removal procedure in the reverse order.

Tightening torque of the side airbag sensor mounting bolts is 8 N•m (71 lb-in).

Front Seat Belt Pretensioner

For removal and installation, refer to Section 8A, Seat Belts.

Airbag Module Deployment (Inside of Vehicle)

Deploy the airbags before disposing them. If a vehicle to be scrapped, the airbag may be deployed inside the vehicle.

Caution : To avoid injury while deploying an airbag or a pretensioner in the vehicle, observe the following precaution :

Before deploying the airbags, remove all loose objects from the airbag's expansion area.
Deploy the airbags with the vehicle doors closed and the side windows open.
Deploy the airbags only in an evacuated area. Service personnel who must be present during the deployment should be at least 10 meters(33 feet) in front of the vehicle.

Do not connect the voltage source until after having completed all other preparations for the deployment of airbags.
Allow a deployed airbag module or pretensioner cool for 30 minutes before handling.
Wear gloves and eye protection during the disposal procedure.
If the deployment fails, disconnect the voltage source and wait 5 minutes before approaching the vehicle.

Deployment Procedure

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 begin service until one minute has passed after disconnecting power to SDM. If the airbags are disconnected, service can be executed immediately without waiting for one-minute time period to expire. Failure to temporarily disable the SIR during service can result in unexpected deployment, personal injury and unnecessary SIR repairs.

Disconnect both battery cables and place the battery at least 10 meters (33 feet) from the vehicle.
Remove the driver side knee bolster or instrument panel lower cover from the steering column. Refer to Section 9G, Interior Trim.
At the lower steering column, cut the two wires leading from the supplemental inflatable restraints(SIR) harness to the clock spring.
Strip 13mm(0.5 inch) of the insulation from the end of the wires leading to the clock spring.
Use two additional wires, each at least 10 meters(33 feet) long, to reach from the deployment battery to the inflator module.
Strip 13mm(0.5 inch) of the insulation from the end of these two additional wires.

Twist the two wires together at one end.
Twist the two wires together at one end.
Place the twisted ends of the two wires near the deployment battery. Do not connect the wires to the battery at this time.
Using the free ends of the 10 meters(33 feet) wires leading to the clock spring, make two splices, one at each wires from the airbag modules.
Wrap the wires with insulation tape.
Now that the free ends of the 10 meters(33 feet) wires are spliced to the airbag module wires, and the ends that are twisted together are near the deployment battery. Clear the area.
Untwist the wires that near the deployment battery.
Touch one wire to the positive battery terminal and touch the other wire to the negative battery terminal. The airbag will deploy.
Repeat this procedure for the passenger airbag, side airbags and pretensioners.
Using proper precautions, dispose of the deployed airbags/pretensioners. Refer to "Deployed Airbag Module Disposal Procedure" in this section.

Airbag Module Deployment (Outside of Vehicle)

If the vehicle is within the warranty period, contact the Daewoo regional service manager for approval or special instructions before deploying the airbag modules.

Deploy airbag modules in following situations :

If the vehicle is to be strapped. Refer to "Airbag Module Deployment(Inside of Vehicle" in this section.
If an airbag module is damaged during transit, storage or service.

Caution : To avoid injury while deploying an airbag or a pretensioner outside the vehicle, observe the following precaution :

Deploy the airbags only in an evacuated area. Service personnel who must be present during the deployment should be at least 10 meters(33 feet) in front of the vehicle.
Do not connect the voltage source until after having completed all other preparations for the deployment of airbags.
Allow a deployed airbag module or pretensioner cool for 30 minutes before handling.
Wear gloves and eye protection during the disposal procedure.
If the deployment fails, disconnect the voltage source and wait 5 minutes before approaching the vehicle.

Position the airbag module face up, on flat ground outdoors, at least 10 meters(33 feet) from the any obstacles or people.

Use two additional wires, each at least 10 meters(33 feet) long, to reach from the deployment battery to the airbag module/pretensioner.
Strip 13mm(0.5 inch) of the insulation from the ends of these two additional wires.
Twist the two wires together at one end.
Place the twisted ends of the two wires near the deployment battery. Do not connect the wires to the battery at this time.

Using the free ends of the 10 meters(33 feet) wires leading to the airbag module/pretensioner, make two splices, one at each wires from the airbag module/pretensioner.
Wrap the splices with insulating tape.
Now that the free ends of the 10 meters(33 feet) wires are spliced to the airbag module/pretensioner wires, and the ends that are twisted together are near the deployment battery, clear the area.
Untwist the wires that near the deployment battery.
Touch one wire to the positive battery terminal and touch the other wire to the negative battery terminal. The airbag will deploy.
Using proper precautions, dispose of the deployed airbags/pretensioners. Refer to "Deployed Airbag Module Disposal Procedure" in this section.

Deployed Airbag Module disposal Procedure

Caution : After deployment, a powdery residue may be on the surface of the airbag. The powder primarily consists of cornstarch(used to lubricate the bag as it inflates) and by-products of the chemical reaction. The sodium hydroxide then quickly reacts with atmospheric moisture and is converted to sodium carbonate and sodium bicarbonate(also known as baking soda). Therefore, it is unlikely that sodium hydroxide will be presents after deployment.

Caution : Be sure to wear gloves and eye protection during the disposal procedure.

Caution : After deployment, the metal surfaces of the airbag module will be hot. In order to avoid the risk of an injury or a fire do not place the deployed airbag module near any flammable objects, and allow the airbag module to cool 30 minutes before handling.

Deploy an airbag or pretensioner before disposing of it.

This includes those in a whole vehicle being scrapped. If the vehicle is still within the warranty period contact the Daewoo regional service manager for approval or special instructions before deploying an airbag module or a pretensioner. Deployed airbag module or pretensioner should be disposed of in the same manner as other scrap parts, with the addition of the following steps :

Place the deployed airbag or pretensioner in a sturdy plastic bag.
Seal the plastic bag securely.
Wash your hands and rinse them with water after handling a deployed airbag.

SIR Wiring Repair

Connector Repair

Caution : Before attempting any repairs, the SIR must be disabled. Refer to "Disabling the SIR"in this section for instructions on how to disable the SIR.

The terminals in the SIR are made of special metal to provide necessary contact integrity for the sensitive, low energy circuits. These terminals are available only in connector repair assembly packs. Do not substitute any other terminals for those in the assembly packs.

Wire Repair

Caution : Before attempting any repairs, the SIR must be disabled. Refer to "Disabling the SIR"in this section for instructions on how to disable the SIR.

Do not repair any wires of supplemental inflatable restraints(SIR). Replace any damaged wires with new one.