Kia Optima: Restraint

Kia Optima DL3 2019-2020 Service and Repair Manual / Restraint

General information
General

The supplemental restraint system (SRS) is designed to supplement the seat belt to help reduce the risk or severity of injury to the driver and passenger by activating and deploying the driver, passenger, side airbag and seat belt pretensioner in certain frontal or side collisions.

The SRS (Airbag) consists of: a driver side airbag module with the folded cushion and an inflator unit located at the center of the steering wheel, a passenger side airbag module with the folded cushion assembled with inflator unit located in the passenger side crash pad, side airbag modules with the folded cushion and an inflator unit located in the front seat, and curtain airbag modules with folded cushions and inflator units located inside the headliner. The impact sensing function of the SRSCM is carried out by electronic accelerometer that continuously measures the vehicle’s acceleration and delivers the corresponding signal through amplifying and filtering circuitry to the microprocessor.

SRSCM (SRS Control Module)

SRSCM will detect front impact with front impact sensor, and side impact with side impact sensor, to determine airbag module deployment.

1.

DC/DC converter: DC/DC converter in power supply unit includes up/down transformer converter, and provides ignition voltage to 2 front airbag ignition circuits and the internal operation voltage to the SRSCM. If the internal operation voltage is below critical value setting, it will perform resetting.

2.

Back up power supply: SRSCM has separate back up power supply, that will supply deployment energy instantly in low voltage condition or upon power failure by front crash.

3.

Self diagnosis: SRSCM will constantly monitor current SRS operation status and detect system failure while vehicle power supply is on. System failure may be checked with trouble codes using KDS.

4.

Airbag warning lamp on: Upon detecting error, the module will transmit signal to SRSCM indicator lamp located in cluster. MIL lamp will inform the driver of SRS error. Upon Ignition on, SRS lamp will turn on for about six seconds.

5.

Trouble code registration: Upon error occurrence in system, SRSCM will store DTC corresponding to the error. DTC can be cleared only by KDS. However, if an internal fault code is logged or if a crash is recorded, the fault code(s) cannot be cleared.

6.

Self diagnostic connector: Data stored in SRSCM memory will be sent to KDS or other external output devices through connector located below the driver side crash pad.

7.

Once airbag is deployed, the SRSCM must be replaced. It should never be reused.

8.

Side airbag deployment will be determined by SRSCM that detects satellite sensor impact signal upon a side crash.

9.

Check for the normal operation of SRSCM after repair procedure.

Tightening torque
Tightening Torques

Item
N·m
kgf·m
lb·ft
lb·in
Passenger airbag (PAB) bolt
3.9 - 5.8
0.4 - 0.6
2.8 - 4.3
34.7 - 52.0
Side airbag (SAB) nut
5.8 - 7.8
0.6 - 0.8
4.3 - 5.7
52.0 - 69.4
Curtain airbag (CAB) bolt
7.8 - 11.7
0.8 - 1.2
5.7 - 8.6
-
Curtain airbag (CAB) nut
3.9 - 5.8
0.4 - 0.6
2.8 - 4.3
34.7 - 52.0
SRS control module (SRSCM) bolt
10.8 - 13.7
1.1 - 1.4
8.0 - 10.1
-
SRS control module (SRSCM) nus
6.9 - 7.8
0.7 - 0.8
5.1 - 5.7
60.8 - 69.4
Front impact sensor (FIS) bolt
8.8 - 10.8
0.9 - 1.0
6.5 - 7.2

Gravity side impact sensor (P-SIS)
2.0 - 2.9
0.2 - 0.3
1.4 - 2.2
17.4 - 26.0
Gravity side impact sensor (G-SIS)
6.9 - 7.8
0.7 - 0.8
5.1 - 5.7
60.8 - 69.4
Seat belt retractor & Pretensioner
39.2 - 53.9
4.0 - 5.5
28.9 - 39.8
-

Special service tools
Special Service Tools

Tool Name / Number
Illustration
Description
Deployment tool
0957A-34100A

Used for deploying airbag
Deployment adapter
0K57A-3U100A

Used with the deployment tool (0957A-34100A) when deploying DAB, PAB, CAB, BPT
Deployment adapter
0957A-2W100

Used with the deployment tool (0957A-34100A) when deploying SAB
Dummy
0957A-38200

Simulator to check the resistance of airbag wiring harness
Dummy adapter
0957A-2W200

Used with the dummy (0957A-38200)
when checking the resistance of SAB
Dummy adapter
0957A-2G000

Used with the dummy (0957A-38200)
when checking the resistance of DAB, PAB, CAB, BPT

DAB : Driver Airbag

PAB : Passenger Airbag

SAB : Side Airbag

CAB : Curtain Airbag

BPT : Seat Belt Pretensioner

General safety information and caution
Precautions
General Precautions

Please read the following precautions carefully before performing the airbag system service.

Observe the instructions described in this manual, or the airbags could accidentally deploy and cause damage or injuries.

Except when performing electrical inspections, always turn the ignition switch OFF and disconnect the negative cable from the battery, and wait at least three minutes before beginning work.

  

The contents in the memory are not erased even if the ignition switch is turned OFF or the battery cables are disconnected from the battery.

Use the replacement parts which are manufactured to the same standards as the original parts and quality.

Do not install used SRS parts from another vehicle. Use only new parts when making SRS repairs.

Carefully inspect any SRS part before you install it. Do not install any part that shows signs of being dropped or improperly handled, such as dents, cracks or deformation.

Before removing any of the SRSCM parts (including the disconnection of the connectors), always disconnect the SRSCM connector.

Airbag Handling and Storage

Do not disassemble the airbags; it has no serviceable parts. Once an airbag has been deployed, it cannot be repaired or reused.

For temporary storage of the air bag during service, please observe the following precautions.

Store the removed airbag with the pad surface up.

Keep free from any oil, grease, detergent, or water to prevent damage to the airbag assembly.

Store the removed airbag on secure, flat surface away from any high heat source (exceeding 85 C/185 F).

Never perform electrical inspections to the airbags, such as measuring resistance.

Do not position yourself in front of the airbag assembly during removal, inspection, or replacement.

Refer to the scrapping procedures for disposal of the damaged airbag.

Be careful not to bump or impact the SRS unit or the side impact sensors or front impact sensors whenever the ignition switch is ON, wait at least three minutes after the ignition switch is turned OFF before begin work.

During installation or replacement, be careful not to bump (by impact wrench, hammer, etc.) the area around the SRS unit and the side impact sensor and the front impact sensors. The airbags could accidentally deploy and cause damage or injury.

Replace the front airbag module, SRSCM, FIS when deploying the front airbag. Replace the airbag wiring when the airbag wiring get damaged. Replace the side airbag module, the curtain airbag module, SRSCM, SIS when deploying the side airbag. Replace the airbag when the airbag wiring get damaged.

After a collision in which the airbags or the side air bags did not deploy, inspect for any damage or any deformation on the SRS unit and the side impact sensors. If there is any damage, replace the SRS unit, the front impact sensor and/or the side impact sensors.

Do not disassemble the SRS unit, the front impact sensor or the side impact sensors.

Turn the ignition switch OFF, disconnect the battery negative cable and wait at least three minutes before beginning installation or replacement of the SRS unit.

Be sure the SRS unit, the front impact sensor and side impact sensors are installed securely with the mounting bolts.

Do not spill water or oil on the SRS unit, or the front impact sensor or the side impact sensors and keep them away from dust.

Store the SRS unit, the front impact sensor and the side impact sensors in a cool (15 ~ 25 C/ 59 ~ 77 F) and dry (30 ~ 80% relative humidity, no moisture) area.

Wiring Precautions

SRS wiring can be identified by special yellow outer covering. Observe the instructions described in this section.

Never attempt to modify, splice, or repair SRS wiring. If there is an open or damage in SRS wiring, replace the harness.

Be sure to install the harness wires so that they are not pinched, or interfere with other parts.

Make sure all SRS ground locations are clean, and grounds are securely fastened for optimum metal-to-metal contact. Poor grounding can cause intermittent problems that are difficult to diagnose.

Precautions for Electrical Inspections

When using electrical test equipment, insert the probe of the tester into the wire side of the connector.

Do not insert the probe of the tester into the terminal side of the connector, and do not tamper with the connector.

Use a u-shaped probe. Do not insert the probe forcibly.

Use specified service connectors for troubleshooting.

Using improper tools could cause an error in inspection due to poor metal contact.

Spring-Loaded Lock Connector

Some SRS system connectors have a spring-loaded lock.

Airbag Connector

Disconnecting

To release the lock, pull the spring-loaded sleeve (A) and the slider (B), while holding the opposite half of the connector.

Pull the connector halves apart. Be sure to pull on the sleeve and not on the connector half.

Connecting

Hold both connector halves and press firmly until the projection(C) of the sleeve-side connector clicks to lock.

The airbag module disposal procedure
The Airbag Module Disposal Procedure

When disposing a vehicle that is equipped with an airbag system and other restraint devices such as seatbelt pretensioners, airbags must first be deployed.

Airbag deployment must be performed by an experienced technician.

Airbags that have been deployed cannot be reused and must not be mounted to any other vehicles.

  

Deployment of airbags upon disposal of a vehicle is necessary as unintended deployment of such airbags can inflict serious physical injury.

At the time of disposal, the airbag module should, in principle, be deployed as it is mounted in the vehicle. Do not remove the airbag module unless it is absolutely necessary.

If the airbag module has been removed from the vehicle due to airbag replacement (when repairing after a traffic accident, during warranty repair, etc.), the module must be deployed outside the vehicle following the instructions that apply.

(Deploying the airbag module inside the vehicle may damage the vehicle.)

Do not disassemble module.

Do not damage the airbag module.

Do not drop the airbag module.

Deployment of the airbag module must be performed on an even surface where there are no risk elements.

To deploy the airbag system, operate the airbag module at least 7 meters away from the airbag system.

As it can emit smoke, deploy in a well ventilated area with no smoke detector nearby

To deploy the airbag system, use the specified special service tools at all times and perform the procedure in a location where there is no electrical noise.

Always wear protective gloves, goggles, and earplugs during deployment.

Keep deployed module away from water.

Tools and equipment required to dispose of the airbag module

Illustration
Tool Name
Remarks

Gloves

Goggles

Earplugs

2 tires with wheel rim
(Top / Bottom)

3 tires without wheel rim
(Middle)

Rope Strap / Ratchet Strap
(Use for connecting the airbag module equipment and tires according to the deployment instructions)

12V battery


Deployed within the vehicle

1.

Turn the ignition switch OFF and disconnect the negative battery terminal.

  

After disconnecting the cables, wait at least 30 seconds.

2.

Confirm that each airbag module is securely mounted.

3.

Refer to the following to prepare for the deployment of the airbag system:

(1)

Inside the vehicle, remove the connector of the airbag to be deployed.

(2)

Connect the deployment adaptor from airbag/pretensioner.

For the driver airbag module, remove the connector and connect the deployment adapter. Reattach the module to the steering wheel.

4.

The mechanic shall be located at least 7 meters away from the vehicle.

5.

Connect the external battery after connecting the deployment tool (0957A-34100A) from the deployment adaptor.

(1)

Battery (12V)

(2)

Deployment tool (0957A-34100A)

(3)

Deployment adaptor

Driver airbag (0K57A-3U100A)

Passenger airbag (0K57A-3U100A)

Curtain airbag (0K57A-3U100A)

Knee airbag (0957A-3F100)

Side airbag (0957A-2W100)

Seat belt pretensioner (0K57A-3U100A)

Anchor pretensioner (0K57A-3U100A)

6.

Activate the switch of the airbag deployment tool to deploy the airbag system.

(1)

When properly connected to the battery (12 V), the POWER ON (1) will illuminate.

(2)

Press and hold READY (2) until the READY (2) lamp illuminate. Then, press DEPLOY (3) to deploy the system.

  

The airbag system generates an explosion-like sound when deployed. Make sure to choose a safe place to avoid any disturbance the procedure may cause.

  

Airbag deployment can be confirmed by audio (from the intense noise) and visually, as airbags instantly inflate and then gradually deflate.

7.

Place deployed airbags in a sturdy plastic bag, securely seal the bag, and dispose of the bag.

  

Allow at least 30 minutes for cooling before handling the airbag system as it generates extreme heat upon deployment.

Wash your hands thoroughly with soap and water after disposal.

Deployment in a vehicle outside

1.

Lay the rope (A) on the floor to form a cross and place the wheeled tire (B) over it.

2.

Install the deployment adaptor (0K57A-3U100A) from airbag module/pretensioner.

3.

Fix the airbag module/pretensioner (A) from wheel.

[Airbag Module]

  

The deployed side of the airbag must face up. The airbag may spring up and cause a serious physical damage to the operator if the deployed side is facing down.

[Pretensioner]

  

Install the anchor pretensioner with the end of the piston tube facing the floor.

4.

Place three waste tires (A) first, then place wheeled tire (B) on top of the pile.

5.

Secure the tire with the ratchet strap (C).

6.

Connect to the battery. Connect the airbag deployment tool (0957A-34100A) to the deployment adapter (0K57A-3U100A).

7.

When the POWER ON (A) is illuminated on the airbag deployment tool, press READY (B), and then DEPLOY (C) to deploy the airbag.

  

The airbag system generates an explosion-like sound when deployed. Make sure to choose a safe place to avoid any disturbance the procedure may cause.

  

Airbag deployment can be confirmed by audio (from the intense noise) and visually, as airbags instantly inflate and then gradually deflate.

8.

Place deployed airbags in a sturdy plastic bag, securely seal the bag, and dispose of the bag.

  

Allow at least 30 minutes for cooling before handling the airbag system as it generates extreme heat upon deployment.

Wash your hands thoroughly with soap and water after disposal.

Steering Gear Box
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SRSCM
Components and components location Components 1. Supplemental Restraint System Control Module (SRSCM) 2. Gravity Side Impact Sensor (G-SIS) 3. Front Impact Senso ...

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