SUPPLEMENTAL RESTRAINT SYSTEM (SRS AIRBAG)

1 SUPPLEMENTALRESTRAINTSYSTEM(SRS AIRBAG) Return To Main Table of (SRS Control Module).. 9 airbag MODULE (DRIVER) AND CLOCK 12 airbag MODULE SUPPLEMENTAL RESTRAINT SYSTEM (SRS) is designed to supplement the driver s seat belt to help reduce the risk or severityof injury to the driver by activating and deploying a drivers-side air bag in certain frontal SRS (Air-bag) consists of; a driver side air bag module located in the center of the steering wheel, which containsthe folded air-bag and an inflator unit: SRSCM (SRS control module) located under the rear console assembly, whichmonitors the SYSTEM , and an accelerometer which senses the vehicle deceleration an SRS SRI (Service reminderIndicator) located on the cluster, which indicates the operational status of the SRS; a clock spring interconnection locatedwithin the steering column; SYSTEM wiring and wiring connector.

2 And a knee bolster located under the steering impact sensing function of the SRSCM is carried out by electronic accelerometer that continuously measure thevehicle s acceleration and delivers a corresponding signal through amplifying and filtering circuitry to the is designed to occur in frontal or near-frontal impacts of moderate to severe authorized service personnel should do work on or around the SRS components. Those service personnel shouldread this manual carefully before starting any such work. Extreme care must be used when servicing the SRS, to avoidinjury to the service personnel (by inadvertent deployment of the air bag) or the driver (by rendering the SRS inoperative)CUSTOMER CAUTIONSF ailure to carry out service operations in the correct sequence could cause the airbag SYSTEM to unexpectedly deployduring servicing, possibly leading to a serious , if a mistake is made in servicing the airbag SYSTEM , it is possible the airbag may fail to operate when performing servicing (including removal or installation of parts, inspection or replacement)

3 , be sure to read thefollowing items carefully, then follow the correct procedure described in the repair must be started after approx. 30 seconds or longer from the time the ignition switch is turned to the LOCK positionand the negative (-) terminal cable is disconnected from the battery. (The airbag SYSTEM is equipped with a back-uppower source so that if work is started within 30 seconds of disconnecting the negative (-) terminal cable of the battery,the airbag may be deployed.)When the negative (-) terminal cable is disconnected from the battery, memory of the clock and audio systems willbe cancelled.

4 So before starting work, make a record of the contents memorized by the audio memory SYSTEM . Thenwhen work is finished, reset the audio SYSTEM as before and adjust the symptoms of the airbag SYSTEM are difficult to confirm, so the diagnostic codes become the most importantsource of information when troubleshooting the airbag SYSTEM , always inspect the diagnostic codes before disconnecting the use airbag parts from another vehicle. When replacing parts, replace them with new attempt to disassemble and repair the airbag modules, SRSCM, Clock spring and Air-bag wiring harnessin order to reuse the SRSCM or air-bag module have been dropped, or if there are cracks, dents or other defects in the case, bracketor connector, replace them with new work on the airbag SYSTEM is completed, perform the SRS SRI INDEPENDENT LAMP ACTIVATIONT here are certain fault conditions in which the SRSCM (SRSC ontrol Module) cannot function and thus cannot control theoperation of the lamp.

5 In these cases, the lamp is directly activatedby appropriate circuitry that operates independently of the SRSCM,as of ignition voltage supply to the SRSCM: lamp turned of internal operating voltage: lamp turned on of SRSCM operation: lamp turned on not connected: lamp turned on continuously throughshorting bar in wiring harness connectorCLOCK SPRING (in MULTI-FUNCTION SWITCH)The steering wheel must be fitted correctly to the steering columnwith the clock spring at the neutral position, otherwise cabledisconnection and other troubles may result. Refer to page 56A-13of this manual concerning correct steering wheel SERVICE TOOLToolName and DescriptionAirbag wiring harness checkerAirbag wiring harness checker (0957A-34000)- Harness inspection- SRSCM inspection with dummy terminalsDeployment tool (0957A-34100)- Deployment of undeployed Air-bag module(When vehicle will not longer be driven)56A-4 GENERALAIR-BAG MODULE (with airbag )

6 Removing the air-bag module or handling a newair-bag module, it should be placed with the pad top surfacefacing this case, the twin-lock type connector lock lever should bein the lock state and care should be taken to place it so theconnector will not be damaged. And do not store a steeringwheel pad on top of another one. (Storing the pad with itsmetallic surface up may lead to a serious accident if the airbaginflates for some reason.)Never measure the resistance of the airbag squib.(This may cause the airbag to deploy, which is very dangerous.)Store the air-bag module where the ambient temperatureremains below 93 C (200 F) without high humidity and awayfrom electrical using electric welding, first disconnect the airbag con-nector (red color and 2 pins) under the steering column nearthe MULTI-FUNCTION SWITCH connector before (SRS Control Module)Install the SRSCM with the arrow on the SRSCM facing towardthe front of the LABELSA number of caution labels relating to the SRS are found in the vehicle, as shown in the following illustration.

7 Followlabel instructions when servicing labels are dirty or damaged, replace them with new ONLYCAUTIONTO AVOID SERIOUS INJURY:For maximum safety protection in all types ofcrashes, you must always wear your safety not sit or lean unnecessarily close to the air not place any objects over the air bag or betweenthe air bag and the owner s manual for further information DAB : SRSAir bag SYSTEM is normal if SRS lamp, in clusterflashes approximately 6 times and then goes outafter ignition key is turned , if any of the following conditions occur thesystem must be SRS lamp does not light when key is turned SRS lamp flashes or stays lit The airbag has fasten children in child- restraints placed inthe rear seating positions are safer for !

8 Failure to follow above instruction canresult in injury to you or other occupants andchildren in the SRS section in Owners Manual for moreinformation about ! Poison. Keep out of the reach of sodium azide and potassium nitrate con-tents are poisonous and extremely flammable. Con-tact with acid, water, or heavy metals may produceharmful and irritating gases or explosive not dismantle, incinerate, bring into contact withelectricity of store at temperature exceeding ( C)200 aid: If contents are swallowed, induce eye contact flush eye with water for 15 gases from acid or water contact are inhaled, seekfresh air.

9 In every case, get prompt medical additional information, see material safety datasheet (MSDS) for this removal of steering gearbox, read servicemanual, center front wheels and remove to do so may damage SRS clock spring andrender SRS SYSTEM inoperative, risking serious : SRSB efore replacing steering wheel, read service manual,center front wheels and align SRS clock springneutral to do so may render SRS SYSTEM inopera-tive, risking serious driver SRSTo help avoid personal injury due to unwantedinflation do not service or dispose of this unit withoutfollowing instructions in the service : SRS clock springThis is not a repairable part.

10 Do not disassemble defective, remove and replace entire unit perservice manual replacement, read service manual, centerfront wheels and align neutral to follow instructions may render SRS sys-tem inoperative, risking serious driver COMPONENTSRSCM CONNECTORC onnector pinoutPin 1 Driver inflator, low sidePin 2 Driver inflator, high sidePin 3 Serial data input, outputPin 7 Ignition voltagePin 9 SRS SRIPin 10 GroundShorting bar removal tabPin 14,15 Driver side inflatorPin 18,19 Not usedPin 22,23 SRS SRIPin 24, 25 Not usedGENERALWIRING DIAGRAMIN ON OR STARTSRSCMSRSCM (SRS CONTROL MODULE)The SRSCM is mounted below rear console electronic accelerometer which is located in the SRSCM sensethe vehicle deceleration for determining the firing instant anddiscriminating between must-deploy and must-not-deploy attempt to disassemble or repair the SRSCM.