Kia Rio: Restraint

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

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.

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/GDS.

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

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

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

Once airbag is deployed. The SRSCM should not be used again and should be replaced.

SRSCM will determine whether passenger put on the seat belt by the signal from built-in switch in the seat belt buckle, and deploy front seat airbag at each set of crash speed.

Side airbag deployment will be determined by SRSCM that detects satellite sensor impact signal upon a side crash, irrespective to seat belt condition.

SRSCM is sensing the vehicle rollover by using the rollover sensor. SAB, CAB, BPT will be able to expanse if mechanic moves the SRSCM during IGN ON state. For this reason, disconnect the battery negative cable during the SRSCM repair procedure.

Check for the normal operation of SRSCM after repair procedure.

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.

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.

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.

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.

Active fault or historical fault counter is greater or equal to 10.

Normal or historical fault counter is less than 10.

When turning the ignition switch ON during variant coding (EOL) mode, the airbag warning lamp illuminates and blinks at intervals of 1 second till the coding is completed.

In case the variant coding is completed normally, the airbag warning lamp is turned on for 6 seconds, and then turned off. Otherwise the airbag warning lamp continuously blinks at intervals of 1 second.

When there is active fault in airbag system or SRSCM internal fault, the variant coding (EOL) can’t be completed. In this case, do the variant coding (EOL) procedure again after troubleshooting with the KDS/GDS.

Loss of battery supply to the SRSCM : warning lamp turned on continuously.

Loss of internal operating voltage : warning lamp turned on continuously.

Loss of Microprocessor operation : warning lamp turned on continuously.

SRSCM not connected : warning lamp turned on continuously.

Before doing any SRS repairs, use the KDS/GDS to check for DTCs. Refer to the Diagnostic Trouble Code list for repairing of the related DTCs.

SRSCM

Deployed airbag(s)

Seat belt pretensioner(s)

Front impact sensors

Inspect the clock spring for heat damage.

If any damage found, replace the clock spring.

SRSCM

Deployed airbag(s)

Side impact sensor(s) for the deployed side(s)

Turn the ignition switch ON; the SRS indicator should come on for about six seconds and then go off.