SUPPLEMENTAL RESTRAINT SYSTEM (SRS AIRBAG)
Contents
1. Connect the SRS harness checker to SRSCM harness side connector Deployment tool 0957A 34100 57YRO600 56A 48 AIR BAG MODULE DISPOSAL 7 Atlocation as far away from the vehicle as possible press the pugh button removed from the vehicle to deploy the air bag Caution 1 Before deploying the air bag in this manner first check to be sure that there is no one in or near the vehicle Wear safety glasses 2 The inflator will be quite hot immediately following the deployment so wait at least 30 minutes to allow it to cool before attempting to handle it Although poisonous do inhale gas from air bag deployment See Deployed Air Bag Module Disposal Procedures for post deployment handling instructions 3 If the air bag fails to deploy when the procedures above are followed do not go near the module DEPLOYED AIR BAG MODULE DISPOSAL PROCEDURES After deployment the air bag module should be disposed of in the same manner as any other scrap parts except that the following points should be carefully noted during disposal 1 The inflator will be quite hot immediately following deployment so wait at least 30 minutes to allow it to cool before attempting to handle it 2 Do not put water or oil on the air bag after deployment 3 There may be adhered to the deployed air bag module material that could irritate the eyes and or skin so wear gloves and safety glasses when handling a depl2. DRIVER AND CLOCK SPRING COMPONENTS Airbag module Y Steering wheel clock spring AIR BAG MODULE with AIRBAG The inflater and bag of the airbag system are stored in the air bag module and cannot be disassembled The inflater contains a squib igniter charge gas generant etc and will inflate the bag in case of a frontal collision CLOCK SPRING in MULTI FUNCTION SWITCH A clock spring is used as an electrical joint from the vehicle body side to the steering wheel AIR BAG MODULE DRIVER AND CLOCK SPRING 56A 13 REMOVAL CAUTION 1 Never attempt to disassemble or repair the air bag module or clock spring If faulty replace it 2 Do not drop the air bag module or clockspring or allow contact with water grease or oil Replace it if a dent crack deformation or rust are detected 3 The air bag module should be stored on a flat surface and placed so that the pad surface is facing upward Do not place anything on top of it 4 Do not expose the air bag module to temperature over 93 C 200 F 5 After deployment of an air bag replace the clock spring with a new one 6 Wear gloves and safety glasses when handling an air bag that has already deployed 7 An undeployed air bag module should only be dis posed of in accordance with the procedures 1 Disconnect the negative battery cable and keep secure from battery CAUTION Wait at least 30 seconds after disconnecting the battery ca
3. Never attempt to measure the resistance of the DAB squib 5 Active DAB Driver Air Bag module circuit Short circuit in DAB wire harness 55 History resistance too low short circuit o Air bag module malfunction DAB Clock spring cable malfunction o SRSCM WIRING DIAGRAM DAB DRIVER AIR BAG CLOCK SPRING WITH INITIATOR Initiator Initiator SRS CONTROL io sie MODULE 56A 36 CIRCUIT INSPECTION INSPECTION PROCEDURE 1 Before inspection 1 Disconnect battery negative terminal cable Caution Wait at least 30 seconds Remove the air bag module Caution When storing air bag module keep the pad surface facing upward 2 Check Air bag SRSCM Disconnect clock spring connector Connect dummy terminal to harness side of DAB the inflator connector with Airbag wiring Inflator SRS harness checker Control Connect negative terminal cable to battery and wait at least 5 seconds Module 4 Connect the SCAN TOOL terminal and turn ignition switch ON uwr Diagnostic code 5 is not displayed 1121314 5 746 7181910 9 p ay 1112131415161718 192021 NOTE Code other than code 5 may be displayed at this time but this is not relevant to this check CIRCUIT INSPECTION 56A 37 3 Check Inflator circuit Driver 1 Disconnect SRSCM harness connector 2 Connectthe SRS harness checker to the SRSCM connector 3 Check between c
4. disposal steps as follows DISPOSAL PLAN Abnormal problems in air bag module Return to HMC dealer Car scrapping Deploy the air bag module in the scrapper yard with SST Crash Deployed Service station disposes the Air bag module UNDEPLOYED AIR BAG MODULE DISPOSAL Caution 1 If the vehicle is to be scrapped junked or otherwise disposed of deploy the air bag inside the vehicle 2 Since there is a loud noise when the air bag is deployed avoid residential areas whenever possible If anyone is nearby give warning of the impending noise 3 Since a large amount of smoke is produced when the air bag is deployed select a well ventilated site Moreover never attempt the test near a fire or smoke sensor AIR BAG MODULE DISPOSAL 56A 47 DEPLOYMENT INSIDE THE VEHICLE when vehicle will no longer be driven 1 Open all windows and doors of the vehicle Move the vehicle to an isolated spot 2 Disconnect the negative and positive 4 battery cables from the battery terminals and then remove the battery from the vehicle Caution Wait at least 30 seconds after disconnecting the battery cable before doing any further work 3 Remove the rear console assembly 4 Remove Air bag SRSCM connector 5 Connect disposal tool to the air bag checker R terminal 6 Connect SRS air bag adapter harness battery and when the SRS harness checker still disconnected to prevent sudden unexpected deployment of the air bag
5. is detected the SRI will turn off at the end of the current ignition cycle The fault will also be recorded in the history fault code 57 SRI OFF ON Second Ignition 56A 20 TROUBLESHOOTING SCAN TOOL CHECK 1 Turn the ignition OFF 2 Connect the scan tool to the data link connector in the fuse box 3 Connect the power source terminal of the scan tool to the cigarette lighter socket 4 Turn the ignition ON 5 Use the scan tool to check the diagnostic trouble codes 6 Complete the repair or correction of the problems after turning OFF the ignition switch then erase the stored diagnostic trouble codes using the SCAN TOOL 7 Disconnect the scan tool DIAGNOSTIC CONNECTOR GROUND 31480130 TROUBLESHOOTING 56A 21 Description Driver inflator short circuit to ground Driver inflator short circuit to battery Driver inflator circuit open Resistance too high Diagnostic Trouble Code DTC Chart O 4 5 c D Scan tool MUT display 31 35 9 53 Driver inflator circuit short Resistance too low kd E E E e E ES 39 42 45 45 45 Ignition input voltage too low ER Ignition input voltage too high Supplemental restraint system Air bag service reminder indicator short to ground or to battery open circuit Service restraint system Air bag contro
6. 6A 42 CIRCUIT INSPECTION SERVICE REMINDER INDICATOR CIRCUIT The SRI is located on the cluster When the air bag system is normal the SRI flashes for approx 6 seconds after the ignition switch is turned ON and then turns off S i automatically EE ER If there is a malfunction in the air bag system the SRI lights up to inform the driver of the abnormality The SRSCM shall measure the voltage at the air bag SRI Malfunc tion Indicator Light output pin both when the lamp is on and when the lamp is off to detect whether the commanded state matches the actual state Symptom Trouble Area 13 Active SRS SHI short to ground or to battery o SRI circuit 63 History voltage open circuit o SRSCM SRI does not light up GO TO 43 SRI light up permanently GO TO 44 WIRING DIAGRAM O 5BLU WHT 44 113 1 1 CLUSTER SRS SRI 0 5GRN BLK Ignition SRS Voltage Warning Lamp CIRCUIT INSPECTION 56A 43 INSPECTION PROCEDURE DOES NOT LIGHT UP 1 Check Air bag Fuse 1 Remove fuse 10 and 18 located in dash fuse box 2 Check continuity of fuse 10 and 18 Continuity 2 Check SRS SRI circuit Disconnect battery negative terminal cable and wait 30 seconds Remove the DAB connector Disconnect SRSCM connector and connect DAB SRS Airbag wiring harness checker to SRSCM Inflat Control connector nator Module Connect battery negative terminal cable Ground
7. RS system inopera tive risking serious driver injury WARNING SRS To help avoid personal injury due to unwanted inflation do not service or dispose of this unit without following instructions in the service manual CAUTION SRS clock spring This is not a repairable part Do not disassemble or tamper If defective remove and replace entire unit per service manual instructions Before replacement read service manual center front wheels and align neutral marks Failure to follow instructions may render SRS sys tem inoperative risking serious driver injury GENERAL 56A 7 SYSTEM COMPONENT DAB 57JROO1t SRSCM CONNECTOR 2000000000000 oOo dug Connector pinout Driver inflator low side Driver inflator high side Shorting bar removal tab Ponal Aipu oH put Pin 14 15 Driver side inflator oho oh Pin 22 23 SRS SRI Ground Pin 24 25 56A 8 WIRING DIAGRAM GENERAL IN ON OR START r re FUSE 18 15A 0 5BLU WHT 7 A MIO1 0 5BLU WHT 4 113 1 SRI 8Y 13 2 0 5BLK RED 4S MIO1 0 5BRN BLK 1 C Ignition oltage Ser al Data input output 3 0 5BLK WHT FUSE 10A SRS Warning Lamp 1 DASH oe FUSE Box TI CLUSTER 1 1 1 Initiator Initiator SRS low side MODULE Ground 10 M81 M82 0 5BLU 12 M33 a iDATA 10 CONN 31 SRSCM 56A 9 SRSCM SRS CONTROL MODULE Rear co
8. SCM operation lamp turned on continuously 4 SRSOM not connected lamp turned on continuously through shorting bar in wiring harness connector CLOCK SPRING in MULTI FUNCTION SWITCH The steering wheel must be fitted correctly to the steering column with the clock spring at the neutral position otherwise cable disconnection and other troubles may result Refer to page 564 13 of this manual concerning correct steering wheel installation 57480224 SPECIAL SERVICE TOOL Name and Description Airbag wiring harness checker Airbag wiring harness checker 0957A 34000 Harness inspection SRSCM inspection with dummy terminals Deployment tool 09574 34100 Deployment of undeployed Air bag module When vehicle will not longer be driven 56A 4 GENERAL AIR BAG MODULE with AIRBAG 1 When removing the air bag module or handling a new air bag module it should be placed with the pad top surface facing up In this case the twin lock type connector lock lever should be in the lock state and care should be taken to place it so the connector will not be damaged And do not store a steering wheel pad on top of another one Storing the pad with its metallic surface up may lead to a serious accident if the airbag inflates for some reason 2 Never measure the resistance of the airbag squib This may cause the airbag to deploy which is very dangerous 3 Store the air bag module where the ambient temperature remai
9. SUPPLEMENTAL RESTRAINT SYSTEM SRS AIRBAG Return To Main Table of Contents ooi aee ovi oen c decies 2 SRSCM SRS Control Module 9 AIRBAG MODULE DRIVER AND CLOCK SPRING 12 AIRBAG CONNECTORS TROUBLESHOOTING erret tete 19 AIRBAG MODULE DISPOSAL 46 56A 2 GENERAL GENERAL The supplemental restraint system SRS is designed to supplement the driver s seat belt to help reduce the risk or severity of injury to the driver by activating and deploying a drivers side air bag in certain frontal collisions The SRS Air bag consists of a driver side air bag module located in the center of the steering wheel which contains the folded air bag and an inflator unit SRSCM SRS control module located under the rear console assembly which monitors the system and an accelerometer which senses the vehicle deceleration an SRS SRI Service reminder Indicator located on the cluster which indicates the operational status of the SRS a clock spring interconnection located within the steering column system wiring and wiring connector and a knee bolster located under the steering column The impact sensing function of the SRSCM is carried out by electronic accelerometer that continuously measure the vehicle s acceleration and delivers a corresponding signal through amplifying and filtering circuitry to the microprocess
10. air bag module Caution When storing air bag module keep the pad surface facing upward 2 Check Air bag SRSCM DAB HARNESS Inflator SRS Control Module 1 2 314 5 PQe 7 8 9h 11 2131415161718192021 F3 EM x SCAN 12 1110 918 7 6 1 Disconnect clock spring connector 2 Connect dummy terminal to harness side of the inflator connector with SRS harness checker 3 Connect negative terminal cable to battery and wait at least 5 seconds 4 Connect the SCAN TOOL terminal and turn ignition switch ON Diagnostic code 1 is not displayed NOTE Code other than code 1 may be displayed at this time but this is not relevant to this check TROUBLESHOOTING 56A 25 3 Check inflator circuit Driver 1 Disconnect SRSCM harness connector and clock spring connector AIR BAG HARNESS 2 Connect SRS harness checker to the SRSCM harness connector and clock spring harness side connector 3 Check continuity between terminals 11 12 and body ground No continuity 4 Check clock spring 1 Disconnect DAB and clock spring connector 2 Connect the SRS harness checker to clock spring connector 3 Check continuity between terminals 5 6 and body ground a ue LIMIT No continui ty nd OKIS 56A 26 TROUBLESHOOTING 5 Check Inflator Turn ignition switch to lock and disconnect the negative terminal cable from battery and wait AIR BAG HARNESS at least 30
11. ble before doing any further work 2 Remove the air bag module mounting nut using a socket wrench from the back side 3 When disconnecting the connector of the clock spring from the air bag module press the air bag s lock toward the outer side to spread it open Use a screwdriver as shown in the figure to pry so as to remove the connector gently CAUTION o When disconnecting the air bag module clock spring connector take care not to apply excessive force to it o The removed air bag module should be stored in a clean dry place with the pad cover face up 56A 14 AIR BAG MODULE DRIVER AND CLOCK SPRING 4 Remove the steering wheel by using a special tool 09561 11002 CAUTION Do not hammer on the steering wheel Doing so may damage the collapsible column mechanism 09561 11002 57 120271 INSPECTION AIR BAG MODULE If any improper part are found during the following inspection replace the air bag module with a new one Dispose of the old one according to the specified procedure CAUTION Never attempt to measure the circuit resistance of the air bag module squib even if you are using the specified tester If the circuit resistance is measured with a tester accidental air bag deployment will result in serious personal injury 1 Check pad cover for dents cracks or deformities 57180280 2 Check the air bag module for denting cracking or deformation 3 Check hooks and connectors for damage terminals f
12. hecker terminal 11 and 12 HARODA LIMIT No continuity 161718 Viana 415 HARO135 4 Check Clock Spring 1 Remove the clock spring connectors 2 Connect SRS harness checker to clock spring connector 3 Check continuity between checker terminal 5 and 6 No continuity Replace clock spring 56A 38 CIRCUIT INSPECTION 5 Check Inflator Turn ignition switch to lock and disconnect the AIR BAG HARNESS negative terminal cable from the battery and SRS wait at least 30 seconds DAB Fad Control Connect inflator connector Inflator Module Connect negative terminal cable to battery and wait at least 5 seconds Connect the scan tool terminal and turn ignition Switch ON Diagnostic code 5 is not displayed NOTE Code other than code 5 may be displayed at this time but this is not relevant to this check CIRCUIT INSPECTION 56A 39 IGNITION POWER VOLTAGE CIRCUIT The Air bag SRSCM shall measure the voltage at the ignition input to detect an operating voltage which is out of the normal operating range 7 Active Ignition input voltage too low Fuse 9 in dash fuse box 57 History Air bag harness o Charging system 8 Active Ignition input voltage too high 58 History WIRING DIAGRAM HOT IN ON OR START q CLUSTER 0 5GRN BLK Ignition eU SRS Voltage 5 35 Warning Lamp 56A 40 CIRCUIT INSPECTION 1 Power source SRS DAB Contro
13. in child restraints placed in the rear seat Rear seating positions are safer for children WARNING failure to follow above instruction can result in injury to you or other occupants and children in the vehicle See SRS section in Owners Manual for more information about airbag Danger Poison Keep out of the reach of children Contains sodium azide and potassium nitrate con tents are poisonous and extremely flammable Con tact with acid water or heavy metals may produce harmful and irritating gases or explosive compounds Do not dismantle incinerate bring into contact with electricity of store at temperature exceeding 93 3 C 200 F First aid If contents are swallowed induce vomiting For eye contact flush eye with water for 15 minutes If gases from acid or water contact are inhaled seek fresh air In every case get prompt medical atten tion For additional information see material safety data sheet MSDS for this product CAUTION SRS Before removal of steering gearbox read service manual center front wheels and remove ignition key Failure to do so may damage SRS clock spring and render SRS system inoperative risking serious driver injury Detach connector before unmounting Assemble strictly according to manual instructions CAUTION SRS Before replacing steering wheel read service manual center front wheels and align SRS clock spring neutral marks Failure to do so may render S
14. isplayed NOTE Code other than code 2 may be displayed at this time but this is not relevant to this check CIRCUIT INSPECTION 56A 31 DRIVER AIR BAG MODULE CIRCUIT Resistance too high Open circuit The Air bag SRSCM shall measure the resistance of the DAB Driver Air Bag module to detect a resistance which lies outside the allowed range Do not attempt to measure the resistance of DAB squib Code No Symptom Trouble cause 3 Active DAB Driver Air Bag module circuit Open circuit in DAB wire harness 53 History resistance too high open circuit o Air bag module malfunction DAB Clock spring cable malfunction o SRSCM WIRING DIAGRAM DAB DRIVER AIR BAG CLOCK SPRING WITH INITIATOR Initiator Initiator side high side S CONTROL MODULE 56A 32 CIRCUIT INSPECTION INSPECTION PROCEDURE 1 Before inspection 1 Disconnect battery negative terminal cable Caution Wait at least 30 seconds Remove the air bag module Caution When storing air bag module keep the pad surface facing upward 2 Check Air bag SRSCM DAB Inflator 412131415617 T8 919 112131415 1617181920 21 Disconnect clock spring connector Connect dummy terminal to the harness side of the inflator connector with SRS harness checker Connect negative terminal cable to battery and wait at least 5 seconds Connect the SCAN TOOL terminal and turn igni
15. l Inflator Modile 1234545 7 T8 9 0 11 2131415 8 1718 1920 21 J 2 Ground connection SRS DAB Control Inflator Module AIR BAG HARNESS nues T 23456 7 8 9 10 7st 9021 f Disconnect battery negative terminal cable Caution Wait at least 30 seconds Turn ignition switch to LOCK Disconnect SRSCM connector Connect SRS harness checker to SRSCM con nector and connect battery negative terminal cable Turn ignition switch to ON Engine stop Measure voltage between checker terminal 16 and body ground 9 0 V to 16 0 V 1 Turn ignition switch to LOCK 2 Check continuity between SRS harness checker terminal 18 and body ground Continuity CIRCUIT INSPECTION 56A 41 3 Check SCAN TOOL display 1 Remove battery negative terminal cable 2 Connect SRSCM connector AIR BAG HARNESS 3 Connect battery negative terminal cable 4 Turn ignition switch ON and wait at least 30 Ero second and check that the air bag SRS SRI Inflator goes off 5 Turn ignition switch to lock 6 Connect SCAN TOOL and turn ignition switch ON Diagnostic code 7 8 is not displayed NOTE If the fault disappears or is corrected between two ignition cycles i e while the Air bag SRSCM is off the warning lamp shall remain on for 15 second after the bulb check in the sub sequent ignition cycle NG gt Check battery and charging system 5
16. module internal fault SRSCM CRASH Crash recorded without being erased SRSCM PARAMET Parameter configuration missing incorrect A Active Histroy SRSCM 64 56A 22 TROUBLESHOOTING SERVICE DATA SCAN TOOL SCAN TOOL DISPLAY DESCRIPTION OF TROUBLE CODE 01 CRASH NUMBERS Numbers of airbag activation inflation 02 SRI STATUS The ON OFF status of service reminder indicator ON or OFF 03 SRI TIME The driving time after service reminder indicator ON is MIN recorded for fourty two hours by the minutes interval 04 1G CYCLE The engine starting numbers after service reminder indicator ON can be recorded 100 times NOTE The above service data information can be recorded in non volatile memory by the SRSCM in case of deployment event for retrieval at a later time TROUBLESHOOTING 56A 23 AIR BAG MODULE CIRCUIT Short to Ground The Air Bag Module circuit consists of SRSCM spiral cable clock spring driver side airbag module Code No Symptom Trouble cause 1 Active DAB Driver side air bag module Short circuit in DAB wire harness 51 History circuit short to ground o Air bag module malfunction Clock spring cable malfunction DAB only o SRSCM WIRING DIAGRAM DAB DRIVER AIR BAG 56A 24 TROUBLESHOOTING INSPECTION PROCEDURE 1 Before inspection Disconnect battery negative terminal cable Caution Wait at least 30 seconds Remove the
17. ms will be cancelled So before starting work make a record of the contents memorized by the audio memory system Then when work is finished reset the audio system as before and adjust the clock 2 Malfunction symptoms of the airbag system are difficult to confirm so the diagnostic codes become the most important source of information when troubleshooting When troubleshooting the airbag system always inspect the diagnostic codes before disconnecting the battery 3 Never use airbag parts from another vehicle When replacing parts replace them with new parts 4 Never attempt to disassemble and repair the airbag modules SRSCM Clock spring and Air bag wiring harness in order to reuse it 5 If the SRSCM or air bag module have been dropped or if there are cracks dents or other defects in the case bracket or connector replace them with new ones 6 After work on the airbag system is completed perform the SRS SRI check GENERAL 56A 3 SRSCM INDEPENDENT LAMP ACTIVATION There are certain fault conditions in which the SRSCM SRS Control Module cannot function and thus cannot control the operation of the lamp In these cases the lamp is directly activated Nu dd by appropriate circuitry that operates independently of the SRSCM BIS as follows 1 Loss of ignition voltage supply to the SRSCM lamp turned on continuously 2 Loss of internal operating voltage lamp turned on continuously 3 Loss of SR
18. nal and turn ignition switch ON Diagnostic code 2 is not displayed Inflator 112131415 1112131415 Code other than code 2 may be displayed at this time but this is not relevant to this check CIRCUIT INSPECTION 56A 29 3 Check inflator circuit Turn ignition switch to lock and disconnect the AIR BAG HARNESS negative terminal cable from the battery and wait at least 30 seconds Disconnect SRSCM harness connector and clock spring Connect SRS harness checker to the SRSCM harness connector and clock spring harness de ud side connector 121345295 7 8 910 Connect battery and turn ignition ON sh 4h sen 7 1 8 1 912012 1 Check voltage between terminals 11 12 and 2 body ground nur ov 4 Check Clock Spring 1 Disconnect DAB and clock spring connector and SRSCM connector 2 Connect the SRS harness checker to the clock spring connector 3 Connect battery and turn ignition ON 4 Check voltage between terminals 5 6 and body ground nur ov 56A 30 CIRCUIT INSPECTION 5 Check Inflator 1 Turn ignition switch to lock and disconnect the negative terminal cable from battery and wait AIR BAG HARNESS 2 Connect inflator connector H4 SRS 3 ct negative terminal cable to batter DAB Control 20 y 1 and wait at least 5 seconds Inflator Module 4 Connect the SCAN TOOL terminal and turn Diagnostic code 2 is not d
19. ns below 93 C 200 F without high humidity and away from electrical noise 4 When using electric welding first disconnect the airbag con nector red color and 2 pins under the steering column near the MULTI FUNCTION SWITCH connector before starting work SRSCM SRS Control Module Install the SRSCM with the arrow on the SRSCM facing toward the front of the vehicle GENERAL 56A 5 WARNING CAUTION LABELS A number of caution labels relating to the SRS are found in the vehicle as shown in the following illustration Follow label instructions when servicing SRS If labels are dirty or damaged replace them with new ones xe I ton 1 4 A DAB ONLY CAUTION TO AVOID SERIOUS INJURY For maximum safety protection in all types of crashes you must always wear your safety belt Do not sit or lean unnecessarily close to the air bag Do not place any objects over the air bag or between the air bag and yourself See the owner s manual for further information and explanation 56A 6 GENERAL B DAB ONLY C CAUTION AIRBAG ESPS UNIT Air bag system is normal if SRS lamp in cluster flashes approximately 6 times and then goes out after ignition key is turned on However if any of the following conditions occur the system must be serviced 1 SRS lamp does not light when key is turned on 2 SRS lamp flashes or stays lit continuously 3 The airbag has inflated Always fasten children
20. nsole assembly SRSCM SRS Control Module The SRSCM is mounted below rear console assembly The electronic accelerometer which is located in the SRSCM sense the vehicle deceleration for determining the firing instant and discriminating between must deploy and must not deploy impact conditions 56A 10 SRSCM REMOVAL CAUTION o Never attempt to disassemble or repair the SRSCM If faulty replace it o Do not drop or subject the SRSCM to impact or vibration If denting cracking deformation or rust are discov ered in the SRSCM replace it with a new SRSCM Discard the old one o After deployment of an air bag replace the SRSCM with a new one o Never use an ohmmeter on or near the SRSCM and use only the Scan Tool 1 Disconnect the negative battery cable and keep it secure from the battery CAUTION Wait at least 30 seconds after disconnecting the battery cable before doing any further work 2 Remove the rear console assembly 3 Disconnect the SRSCM harness first before removing the Air bag mounting bolt 4 Remove the SRSCM 57JRO140 SRSCM 56A 11 INSPECTION 1 Check the SRSCM case and brackets for dents cracks or deformities 2 Check connectors and the lock lever for damage and terminals for deformities CAUTION If a dent cracks deformation or rust are discovered replace the SRSCM with a new one 57JR0180 56A 12 AIR BAG MODULE DRIVER AND CLOCK SPRING AIR BAG MODULE
21. or That is designed to occur in frontal or near frontal impacts of moderate to severe force Only authorized service personnel should do work on or around the SRS components Those service personnel should read this manual carefully before starting any such work Extreme care must be used when servicing the SRS to avoid injury to the service personnel by inadvertent deployment of the air bag or the driver by rendering the SRS inoperative CUSTOMER CAUTIONS Failure to carry out service operations in the correct sequence could cause the airbag system to unexpectedly deploy during servicing possibly leading to a serious accident Further if a mistake is made in servicing the airbag system it is possible the airbag may fail to operate when required Before performing servicing including removal or installation of parts inspection or replacement be sure to read the following items carefully then follow the correct procedure described in the repair manual 1 Work must be started after approx 30 seconds or longer from the time the ignition switch is turned to the LOCK position and the negative terminal cable is disconnected from the battery The airbag system is equipped with a back up power 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 syste
22. or defor mities and harness for binds 4 Check air bag inflator case for dents cracks or deformities 5 Install the air bag module to steering wheel to check fit or alignment with the wheel CLOCK SPRING If as a result of the following checks even one abnormal point is discovered replace the clock spring with a new one 1 Check connectors and protective tube for damage and termi nals for deformities protective tube Fady SRSCM 57JR0330 AIR BAG MODULE DRIVER AND CLOCK SPRING 56A 15 2 Visually check the case and the gears for damage Check for continuity between No 1 connector of the clock spring and connectors No 2 Limit Continuity 4 Check of resistance between the terminals 1 Join the No 4 connector of the clock spring to the Airbag wiring harness checker 2 Check continuity between terminals 1 and 2 of the Airbag wiring harness checker Limit Continuity 3 Join the No 4 and No 5 connectors of clock spring to the Airbag wiring harness checker 4 Check continuity between terminals 1 and 2 of the Airbag wiring harness checker Limit No continuity 57JR0320 57YRO320 Airbag wiring harness checker 0957A 34000 57YR0030 Clock spring 57YR0031 56A 16 AIR BAG MODULE DRIVER AND CLOCK SPRING INSTALLATION 1 Installation of clock spring Align the mating mark and NEUTRAL position indicator of the clock spring and after turning the front
23. ot light up First check cluster connector and if good NG Replace Air bag harness OK gt CIRCUIT INSPECTION 56A 45 SRSCM MALFUNCTION The SRSCM shall also cyclically monitor the following a Functional readiness of the firing circuit activation transis tors driver and passenger side b Adequacy of deployment energy reserves driver and passenger side c Safing sensor integrity detection of faulty closure longer than 4 seconds d Plausibility of accelerometer signal e Operation of SRSCM components AID converter etc The timely completion of all tests is monitored by a separate hardware watchdog During normal operation the watchdog is triggered periodically by the SRSCM if the SRSCM fails to trigger the watchdog the watchdog will reset the SRSCM and activate the SRI Service Reminder Indicator 14 Active Internal fault 64 History SRSCM Replace SRSCM 2 SRSCM Replace SRSCM 16 Active Parameter configuration 56A 46 AIR BAG MODULE DISPOSAL AIR BAG MODULE DISPOSAL PROCEDURES Before either disposing of a vehicle equipped with an air bag or prior to disposing of the air bag module be sure to first follow the procedures described below to deploy the air bag AIR BAG REMOTE DEPLOYMENT DEVICES Tool Number Name Use Deployment tool 0957A 34100 o Deployment inside the vehicle when vehicle will not longer be driven DISPOSAL PLAN When the problem occurs take
24. oyed air bag module IF DESPITE THESE PRECAUTIONS THE MATERIAL DOES GET INTO THE EYES OR ON THE SKIN IMMEDIATELY RINSE THE AFFECTED AREA WITH A LARGE AMOUNT OF CLEAN WATER IF ANY IRRITATION DEVELOPS SEEK MEDICAL ATTEN TION Tightly seal the air bag module in a strong vinyl bag for disposal 5 Be sure to always wash your hands after completing this operation B
25. seconds Connect inflator connector DAB Ss Connect negative terminal cable to battery Inflator 47 onto and wait at least 5 seconds Module Connect the SCAN TOOL terminal and turn ignition switch ON Diagnostic code 1 is not displayed 5 12 1110 9 8 7 6 Code other than code 1 may be displayed at this time but this is not relevant to this check CIRCUIT INSPECTION AIR BAG MODULE CIRCUIT Short to Battery The DAB circuit consists of Air bag SRSCM clock spring and the Air bag module Code No Symptom Trouble Area 2 Active DAB Driver side Air bag modulator circuit o Short circuit in DAB wire harness 52 History short to Battery 12V to battery 12V Air bag modulator malfunction Clock spring cable malfunction o SRSCM WIRING DIAGRAM DAB DRIVER AIR BAG ZS dnitiator Initiator SRS 56A 28 CIRCUIT INSPECTION INSPECTION PROCEDURE 1 Before inspection 1 Disconnect battery negative terminal cable Caution Wait at least 30 seconds Remove the air bag module Caution When storing air bag module keep the pad surface facing upward 2 Check Air bag SRSCM Remove clock spring connector Connect dummy terminal to harness side of the inflator connector with SRS harness checker Connect negative terminal cable to bat tery and wait at least 5 seconds Connect the SCAN TOOL termi
26. squib terminals 3 Electrical Connection check mechanism is designed for finding poor connections at the SRSCM connector If it occurs SRS SRI Service Reminder Indicator lights up permanently Anti deploy mechanism Disconnected SRSCM is UNLOCKED Shortening bar SRSCMis Z2 LOCKED P Zor Connected Secondary lock Shortening bar 56A 18 AIR BAG CONNECTORS Driver Air Bag Module DAB Two security mechanism of the DAB is twin lock mechanism and anti deploy mechanism The anti deploy mechanism prevents unexpected deployment by the shortening of the two squib terminals The twin lock mechanism connectors male and female are fastened locked by two locking devices to increase connection reliability If the primary lock is incomplete ribs interfer and prevent the secondary lock Twin lock mechanism Anti deploy mechanism Primary lock Connector is UNLOCKED Shortening Disconnected Secondary lock Connector is Shortening bar LOCKED TROUBLESHOOTING 56A 19 DIAGNOSIS SYSTEM SERVICE REMINDER INDICATOR CHECK When the ignition switch is turned on check that the SRS SRI goes ON for 6 seconds if the SRI is not illuminated immediately after the ignition is turned ON a failure in the area of SRI circuit has occurred FAULT STATUS SRI STATUS ON SRI HUUU OFF ON G key OFF NO FAULT ACTIVE and HISTORYFAULT If an Ignition input voltage too low Fault Code 7
27. the Airbag wiring harness checker terminal 17 Turn ignition switch to ON position SRS SRI is on 45 248 7 8 910 aeter 7181920 First check cluster connector NG m d If ok replace Air bag harness OK gt SRSEM 56A 44 CIRCUIT INSPECTION INSPECTION PROCEDURE Light up permanently NOTE AIR BAG SRSCM INDEPENDENT LAMP ACTIVATION There are certain fault conditions in which the SRSCM cannot function and thus cannot control the operation of the lamp In these cases the lamp is directly activated by appropriate circuitry that operates independently of the SRSCM as follows 1 2 3 Loss of ignition voltage supply to the SRSCM lamp turned on continuously Loss of internal operating voltage lamp turned on continuously Loss of SRSCM operation lamp turned on continuously SRSOM not connected lamp turned on through shorting bar in wiring harness connector Check Air bag SRSCM connector DAB Inflator ontrol Module 1 21314 5 pQ6 7 8 9 0 111 12 13 14 15 16 17 18 192021 CH SRIB Turn ignition switch ON to LOCK Disconnect battery negative terminal cable and wait at least 30 seconds Disconnect SRSCM connector and DAB connector Connect Air bag checker connector to SRSCM harness side connector Connect battery negative terminal cable Turn ignition switch ON LIMIT Does n
28. tion switch ON Diagnostic code 3 is not displayed NOTE Code other than code 3 may be displayed at this time but this is not relevant to this check CIRCUIT INSPECTION 56A 33 3 Check Inflator circuit 1 Disconnect SRSCM harness connector 2 Connect Air bag checker to the clock spring harness side connector amp SRSCM side connector 3 Check between checker terminals as follows Terminals 3 and 11 Terminals 4 and 12 HARO131 NG gt Replace Air bag harness 4 Check Clock Spring 1 Remove the clock spring connectors 2 Connect SRS harness checker to clock spring connector 3 Check continuity between checker terminal 1 and 2 Continuity YCHCL36 56A 34 CIRCUIT INSPECTION 5 Check Inflator Turn ignition switch to lock and disconnect the negative terminal cable from battery and wait at least 30 seconds DAB on Connect inflator connector Inflator Connect negative terminal cable to battery Module and wait at least 5 seconds Connect the scan tool terminal and turn ignition Switch ON Diagnostic code 3 is not displayed NOTE Code other than code 3 may be displayed at this time but this is not relevant to this check CIRCUIT INSPECTION 56A 35 DRIVER AIR BAG MODULE CIRCUIT Resistance too Low Short Circuit The Air bag SRSCM shall measure the resistance of the DAB Driver Air Bag module to detect a resistance which lies outside the allowed range
29. wheels to the straight ahead position install the clock spring to the column switch CAUTION If the clock spring s mating mark is not properly aligned the steering wheel may not be completely rotational dur ing a turn or the flat cable within the clock spring may be 57 JRO320 severed obstructing normal operation of the SRS and possibly leading to serious injury to the vehicle s driver AIR BAG CONNECTORS 56A 17 CONNECTORS All wiring in the airbag system is wrapped in yellow type to distinguish it from others For ensuring high reliability air bag connectors have special functions and specifically designed The connectors use gold plated terminals 1 SRS control Module Twin lock Mechanism Anti deploy Mechanism AIR BAG HARNESS Electrical Connection check Mechanism SRS DAB Control Inflator Module Q D Anti deploy mechanism Twin lock Mechanism 2 Driver Air bag Twin lock Mechanism Anti deploy mechanism Anti deploy Mechanism Twin lock Mechanism G Anti deploy mechanism Twin lock Mechanism Electrical connection check mechanism SRS Control Module Connector SRSCM Connector SRSCM Connector is designed with 3 security systems for preventing unexpected deployment because of poor connections 1 Twin Lock mechanism secures the locking of the terminal by locking device to prevent terminal from coming out 2 Anti deploy mechanism to prevent unexpected deployment by shortening of the two
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