SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Contents
1. B1B54 seat belt switch RH circuit ground side shorted B1B55 seat belt switch RH circuit power supply side shorted B1B56 seat belt switch RH circuit open B1B70 Malfunction of G sensor inside front impact sensor LH B1B71 Malfunction of G sensor inside front impact sensor RH B1B72 Malfunction of G sensor inside side impact sensor LH B1B75 Malfunction of G sensor inside side impact sensor RH B1BA3 Driver s seat slide sensor malfunction occupant classification ECU B1BA5 SRS ECU squib count mismatch B1BAA Occupant classification ECU configuration mismatch B1BC7 SRS ECU record data full system B1C27 Side airbag module LH squib system shorted to squib circuit ground B1C28 Side airbag module LH squib system shorted to squib circuit power supply B1C29 Side airbag module LH squib system squib circuit open B1C2A Side airbag module LH squib system short circuit between squib circuit terminals B1C2B Side airbag module RH squib system shorted to squib circuit ground B1C2C Side airbag module RH squib system shorted to squib circuit power supply B1C2D Side airbag module RH squib system squib circuit open Diagnostic trouble Code No SUPPLEMENTAL RESTRAINT SYSTEM SRS 52B 23 SYSTEM CONSTRUCTION Inspection item B1C2E Side airbag module RH squib system short circuit between squib circ2. bag Seat slide sensor Occupant classification ECU Seat belt switch M2521000700349 Dual stage air bags lt Only 1st stage gt Front impact sensor RH Ignition signal aS Knee air bag lt driver s seat gt Air bag OFF indicator light AC609449AB e The seat slide sensor to detect the driver s seat position judges the deployment in two stages and deploys the driver s air bag e The occupant classification ECU has been added to recognize the passenger s seat occupant The occupant classification ECU identifies the occu pant class based on the signals from weight sen sors and sends the signal to SRS ECU SUPPLEMENTAL RESTRAINT SYSTEM SRS 52B 11 SYSTEM CONSTRUCTION SIDE AND CURTAIN AIR BAGS M2521000800250 Curtain air bag modules Side impact Side impact sensor sensor front RH front LH AC608667 Shock above a certain Pe level Ignition signal D Ignition judgment D G sensor Side airbag curtain air bag ESE E e E E ES Side impact against another vehicle SRS ECU Side airbag modules AC608515 AC609451AB SRS ECU uses data of the side impact sensor and G sensor in SRS ECU to calculate collision sever ity during side collision SRS ECU judges necessity of side airbag and curtain air bag based on the cal culated collision severity SYSTEM CONSTRUCTION DRIVER S SIDE AIR BAG MODULE M2521002000432 Air ba
3. in the non volatile memory EEPROM when a prob lem is detected Therefore the memory is not deleted after a battery terminal is disconnected The diagnostic trouble code memory can be deleted by the scan tool The occupant classification ECU identifies the occu pant class based on the signals from weight sensors and sends the signal to SRS ECU When the occu pant is determined to be less than 66 Ibs 30 kg the passenger s front air bag is not deployed Diagnostic trouble Inspection item Code No B1B78 Passenger seat weight sensor front LH performance B1B79 Passenger seat weight sensor ground side short circuited front LH B1B7A Passenger seat weight sensor power supply side short circuited front LH B1B7D Passenger seat weight sensor front RH performance B1B7E Passenger seat weight sensor ground side short circuited front RH B1B7F Passenger seat weight sensor power supply side short circuited front RH B1B82 Passenger seat weight sensor rear LH performance B1B83 Passenger seat weight sensor ground side short circuited rear LH B1B84 Passenger seat weight sensor power supply side short circuited rear LH B1B87 Passenger seat weight sensor rear RH performance B1B88 Passenger seat weight sensor ground side short circuited rear RH B1B89 Passenger seat weight sensor power supply side short circuited r
4. ouse Re code chart plate SRS warning light lt Vehicles for CANADA gt Passenger s front air bag module Co OOF Driver s air bag module Clock spring lt a DM 4 EA ms MERE 100 120 A B 3210 0 987654 K m P oll 20c E Diagnosis N connector Passenger s seat belt warning light sl aI Passenger s air bag OFF indicator light SRS ECU Knee air bag module D i G SS 3 Y Weight sensor 2 LS Weight sensor Occupant classification ECU Dw Side impact sensor Seat slide sensor Seat belt pre tensioner Front impact sensor AC609363 AB 92B 6 SUPPLEMENTAL RESTRAINT SYSTEM SRS GENERAL INFORMATION SRS SYSTEM CIRCUIT DIAGRAM Fusible link Ignition switch IG1 ETACS ECU Passenger s air bag OFF indicator light Driver s air bag module Passenger s front air bag module Knee air bag module Driver s side Seat belt pre tensioner LH Seat belt pre tensioner RH Side airbag module LH Side airbag module RH Curtain air bag module LH Curtain air bag module RH a CONNECTOR CONNECTOR LOCK SWITCH LOCK SWITCH OFF OFF OFF ON ON ON oi EEN ON pimen a a OFF SEE ON on T OFF CONNECTOR ION LOCK SWITCH OFF CONN
5. 207 Passenger s air bag OFF indicator light short circuit between circuit terminal B1BOO Driver s air bag module 1st squib system shorted to squib circuit ground B1B01 Driver s air bag module 1st squib system shorted to squib circuit power supply B1B02 Driver s air bag module 1st squib system squib circuit open B1B03 Driver s air bag module 1st squib system short circuit between squib circuit terminals B1B04 Driver s air bag module 2nd squib system shorted to squib circuit ground B1B05 Driver s air bag module 2nd squib system shorted to squib circuit power supply B1B06 Driver s air bag module 2nd squib system squib circuit open B1B07 Driver s air bag module 2nd squib system short circuit between squib circuit terminals B1B08 Passenger s front air bag module 1st squib system shorted to squib circuit ground B1BO9 Passenger s front air bag module 1st squib system shorted to squib circuit power supply B1BOA Passenger s front air bag module 1st squib system squib circuit open B1BOB Passenger s front air bag module 1st squib system short circuit between squib Circuit terminals B1BOC Passenger s front air bag module 2nd squib system shorted to squib circuit ground B1BOD Passenger s front air bag module 2nd squib system shorted to squib circuit power supply 92B 22 Diagnostic trouble Code No SUPPLEMENTAL RESTRAINT SYSTEM SRS SYSTEM CONSTRUCTION Inspection ite
6. 92B 1 GROUP 52B SUPPLEMENTAL RESTRAINT SYSTEM SRS CONTENTS GENERAL INFORMATION 52B 2 SIDE AIRBAG MODULE 52B 13 CURTAIN AIR BAG MODULE 52B 14 SYSTEM OPERATION 52B 10 FRONT IMPACT SENSOR 52B 14 ADVANCED AIR BAG AND SEAT BELT WITH SIDE IMPACT SENSOR 52B 14 PRE TENSIONER 52B 10 SEAT SLIDE SENSOR 52B 15 SIDE AND CURTAIN AIR BAGS 52B 11 OCCUPANT CLASSIFICATION ECU AND WEIGHT SENSOR 5 52B 15 SYSTEM CONSTRUCTION 52B 11 SEAT BELT WITH PRE TENSIONER 52B 18 DRIVER S SIDE AIRBAG MODULE 52B 11 PASSENGER SEAT BELT WARNING CLOCK SPRING eee 52B 12 LIGHT ss Me ark g soem NRS dad DR 52B 20 PASSENGER S FRONT AIR BAG PASSENGER S AIR BAG OFF INDICATOR MODULE 52B 12 LIGHT sioria OR OR EE FOR REG 52B 20 KNEE AIRBAG MODULE 52B 13 SRS EGU si esate vice Gd eae Roe ees 52B 21 SRS AIR BAG SPECIAL CONNECTOR 52B 25 92B 2 SUPPLEMENTAL RESTRAINT SYSTEM SRS GENERAL INFORMATION GENERAL INFORMATION A CAUTION Driver and passenger s front air bags knee air bag and seat belt pre tensioner deploy and operate in frontal collisions that exceed the threshold to activate the SRS Supplemental Restraint System The front air bag deploys when a vehicle col lides head on with a concrete fixed wall at approximately 25 km h 15 mph or more or when a vehicle su
7. DO NOT DISASSEMBLE HEAT INCINERATE APPLY ELECTRICITY OR STORE AT HIGH TEMPERATURE 93 C or HIGHER REFER TO WORKSHOP MANUAL FOR DETAILS CAUTION SRS CLOCK SPRING PLEASE DO NOT TURN EXCEPT WHEN REQUIRED THIS IS NOT A REPAIRABLE PART IF DEFECTIVE PLEASE REPLACE ENTIRE UNIT ACCORDING TO THE SERVICE MANUAL INSTRUCTIONS ALIGNMENT OF MODULES IS NECESSARILY WHEN THEY ARE ADJUSTED AND OR INSTALLED FOR THE ALIGNMENT PROCEDURES FOLLOW THE SERVICE MANUAL INSTRUCTIONS CAUTION DO NOT DISASSEMBLE OR DROP IF DEFECTIVE REFER TO SERVICE MANUAL DANGER FLAMMABLE EXPLOSIVE SRS AIR BAG MODULE e Do not disassemble or shock Do not heat or incinerate Do not contact with electricity or tester probes Do not test or diagnose Do not store in more than 200 F 93 C Store the air bag cover is top For information on handing replacement and disposal methods refer to the service manual F lt EXCEPT CANADA gt AC306673 WARNING EVEN WITH ADVANCED AIR BAGS e Children can be killed or seriously injured by the air bag e The back seat is the safest place for children e Never put a rear facing child seat in the front e Always use seat belts and child restraints e See owner s manual for more information about air bags WARNING DEATH or SERIOUS INJURY can occur e Children 12 and under can be killed by the air bag e The BACK SEAT is the SAFEST place for children e NEVER put a rear facing child seat in the fron
8. ECTOR LOCK SWITCH OFF SRS ECU Front impact sensor LH Front impact sensor RH IE Date link connector For scan tool Can bus line 4 Combination meter Front seat assembly Side impact sensor LH Side impact sensor RH C Seat belt switch Driver s side Seat belt switch Passenger s side Jo Note Connector connected ON Connector disconnected OFF AC609377AB SUPPLEMENTAL RESTRAINT SYSTEM SRS 52B 7 GENERAL INFORMATION CAUTION LABELS The labels indicating the precautions for handling and maintenance of SRS air bags and seat belt with pre tensioner are adhered to the locations shown in the above figures Passenger s front Driver s air bag module Clock spring air bag module AC611162 SRS ECU Knee air bag module Sunvisor Ga 2 E a ya SF N 4 eA a d EANA Hh a N N S m z a OD AC608596 AC506231 AC608592 Seat belt with pre tensioner Side airbag module Curtain air bag module right and left right and left right and left je AC608593 AC609443 AB Label contents SUPPLEMENTAL RESTRAINT SYSTEM SRS GENERAL INFORMATION A C DANGER FLAMMABLE EXPLOSIVE
9. L RESTRAINT SYSTEM SRS SYSTEM CONSTRUCTION 4 The gas pressure moves up the piston farther and the pinion rotates the spool to wind the belt PASSENGER SEAT BELT WARNING LIGHT VELL Passenger s IE belt I warning light SE TT Woe AB M2521001500036 The passenger s seat belt warning light turns ON when the pas senger s seat occupant is determined to be 66 Ibs 30 kg or more by the occupant classification ECU and his seat belt is not fastened PASSENGER S AIR BAG OFF INDICATOR LIGHT a JE indicator light k OO aa Woe AC M2521001600055 The indicator normally comes on when the ignition switch is turned to the ON position and goes off a few seconds later In the following situations the indicator will stay on to show that the passenger s front air bag is not operational e The occupant is determined to be less than 66 Ibs 30 kg by the occupant classification ECU e The front passenger s seat is not occupied The indicator goes off when the occupant is determined to be 66 Ibs 30 kg or more by the occupant classification ECU indi cating that the passenger s front air bag is operational SUPPLEMENTAL RESTRAINT SYSTEM SRS 92B 21 SYSTEM CONSTRUCTION SRS ECU The SRS ECU incorporates a front analog G sensor and front safing G sensor for frontal collisions and a side airbag safing G sensor for side collisions SRS ECU enter
10. M2521002100116 Squib connectors bag Inflator AC608598 AC609452AB The passenger s front air bag module consists of The inflator has two squib connector to deploy the air an air bag and their fasteners bag in two steps The air bag is made from nylon and inflates by the The front passenger air bag does not deploy at the gas from the inflator As a passenger is being front passenger seat is not occupied and when the pressed to the air bag it deflates discharging gas occupant classification sensor in the front passenger from two vents at the side of the air bag to reduce the seat senses a weight on the seat of less than 66 shock from the impact pounds 30 kg The front passenger s air bag deploys by changing An inflator that does not contain sodium azide is its inflation pressure in two steps used SUPPLEMENTAL RESTRAINT SYSTEM SRS 92B 13 SYSTEM CONSTRUCTION KNEE AIR BAG MODULE The knee air bag consists of the air bag inflator and fixing gear relating to those parts and is installed onto the instrument panel lower under the steering column SIDE AIRBAG MODULE The side airbag module consists of an air bag air bag cover inflator and their fasteners The modules are installed in the outer side supports of the driver s and front passenger s seatbacks The side airbags help protect the occupants regardless of the seat position and seatback a
11. TRAINT SYSTEM SRS 52B 15 SYSTEM CONSTRUCTION SEAT SLIDE SENSOR M2521001400103 e The seat slide sensor is attached to the slide e adjuster on the driver s seat side and the seat is moved forward backward by seat sliding When the seat is slid forward the shield plate covers the sensor and the sensor determines that the seat slide position is set forward Shield plate position AC609466 AB The seat slide sensor outputs the current by switching high output current and low output cur rent from the seat slide position as shown in the figure Based on the output current SRS ECU determines the deployment stage of the front air bag and then energizes the squib Current value Deployment stage When the shield plate is in the detection range of the seat slide sensor When the shield plate is not in the detection range of the seat slide sensor Low output current Only 1 stage High output current 1st and 2nd stage OCCUPANT CLASSIFICATION ECU AND WEIGHT SENSOR M2521001300032 Weight sensor Re ad Weight sensor Occupant classification ECU AC608516 AB 92B 16 SUPPLEMENTAL RESTRAINT SYSTEM SRS SYSTEM CONSTRUCTION The weight sensors are attached to the seat rails and provide SRS ECU with information on the weight applied to the front passenger seat DIAGNOSTIC TROUBLE CODE OUTPUT The occupant classification ECU diagnoses the fol lowing items and stores a diagnostic trouble code
12. The back seat is the safest place for children Never put a rear facing child seat in the front Always use seat belts and child restraints See owner s manual for more information about air bags Not to be removed except by owner K lt CANADA gt WARNING MISE EN GARDE Children Can Be KILLED or INJURED by Passenger Air Bag The back seat is the safest place for children 12 and under Make sure all children use seat belts or child seats Not to be removed except by owner 92B 10 SUPPLEMENTAL RESTRAINT SYSTEM SRS SYSTEM OPERATION SYSTEM OPERATION ADVANCED AIR BAG AND SEAT BELT WITH PRE TENSIONER Front impact sensor LH Frontal collision against another vehicle Shock above a EIS SN BOS O A O level or Frontal collision against a solid surface e In case of a frontal collision when the front impact sensor inside the engine room and the G sensor inside SRS ECU simultaneously detect an impact that exceeds a certain threshold turned ON SRS ECU energizes the driver s and passenger s front air bag modules squibs knee air bag module squib and driver s and pas senger s seat belt pre tensioners sduibs thus deploying the air bags and triggering the seat belt pre tensioners Also the advanced air bag has been adopted to optimize the air bag deployment control by adjusting the inflation pressure SRS ECU Analog G sensor Ignition judgment G sensor Front air
13. at Empty PFIS Child More 5th Undermined Battery voltage Always 0 to 30 V SUPPLEMENTAL RESTRAINT SYSTEM SRS Display on M U T IIl SYSTEM CONSTRUCTION Check conditions Normal conditions Pa seat weight sensor 1 RR Apply a load to the passenger seat 2 048 Kg 4 515 Ib to 2 048 Kg 4 515 Ib Pa seat weight sensor 1 RR volt Apply a load to the passenger seat 0 to 5 000 mV Pa seat weight sensor 2 RF Apply a load to the passenger seat 2 048 Kg 4 515 Ib to 2 048 Kg 4515 Ib Pa seat weight sensor 2 RF volt Apply a load to the passenger seat 0 to 5 000 mV Pa seat weight sensor 3 LF Apply a load to the passenger seat 2 048 Kg 4 515 Ib to 2 048 Kg 4 515 Ib Pa seat weight sensor 3 LF volt Apply a load to the passenger seat 0 to 5 000 mV Pa seat weight sensor 4 LR Apply a load to the passenger seat 2 048 Kg 4 515 Ib to 2 048 Kg 4 515 Ib Pa seat weight sensor 4 LR volt Apply a load to the passenger seat 0 to 5 000 mV VIN Information Always ACCURACY CHECK OCCUPANT classification sensor The scan tool can be used to perform the next func tion SEAT BELT WITH PRE TENSIONER Spiral Cap Og Gas generator The seatbelt pretensioner automatically winds the seatbelt at the frontal collision to restrain the forward travel of the passenger The seatbelt pretensioner sp
14. ch ON Prohibition After warning light pre check Undo a load from a passenger seat ACTUATOR TEST The scan tool can be used to forcibly operate the next actuator Display on M U T III Test item Driven component SRS warning light SRS warning light illumination ON SUPPLEMENTAL RESTRAINT SYSTEM SRS 52B 25 SYSTEM CONSTRUCTION SRS AIR BAG SPECIAL CONNECTOR M2521009000466 A A A ed io f Curtain air bag module RH o Side airbag module RH A A N N Seat belt with pre tensioner RH Passenger s front air bag module SRS ECU Clock spring Driver s air bag module A Seat belt with pre tensioner LH Driver s knee air bag module AE Side airbag module LH La Curtain air bag module LH A ff A A AC607646 AD To enhance the system reliability a connector short circuiting mechanism is integrated in the SRS ECU connector air bag module connectors clock spring connector and pre tensioner connectors black con nector A shown in the figure 92B 26 SUPPLEMENTAL RESTRAINT SYSTEM SRS SYSTEM CONSTRUCTION CONNECTOR SHORT CIRCUIT MECHANISM SRS ECU connector Partition panel This mechanism prevents the improper deployment of air bag module because of the current application to the squib due to the static electricity when connec tors between SRS ECU and air bag modules squibs are disconnected When the connector is disconnected t
15. dule Inflator AC608585 AB The inflator is of a cold gas type filled with high pres sure gas major component Argon When current passes through the squib to ignite the igniter powder the burst disk bursts emitting the gas into the air bag M2521005000442 e The front impact sensor transmits the coded acceleration e The front impact sensor is installed on the front end upper in the engine room and the analogue G sensor is housed in i 5 gt the front impact sensor AC608583 AB SIDE IMPACT SENSOR Side impact sensor A N AC605684AD data to SRS ECU Based on the data SRS ECU deter mines the deployment stage of the front air bag then ener gizes appropriate squib e SRS ECU performs the diagnostics of the front impact sen sor internal components If a malfunction occurs it sets the diagnostic trouble code M2521006000371 e The side impact sensors are installed to the lower part of the center pillars on both sides and to the quarter panels on both sides and the analogue G sensor is housed in the side impact sensor e The side impact sensor transmits the coded acceleration data to SRS ECU Based on the data SRS ECU determines the deployment of the side airbags and curtain air bags then ener gizes appropriate squib s e SRS ECU performs the diagnostics of the side impact sensor internal components If a malfunc tion occurs it sets the diagnostic trouble code SUPPLEMENTAL RES
16. ear RH B1B8C Seat slide sensor circuit performance B1B8D Seat slide sensor open circuit B1B8E Seat slide sensor short circuit B1B91 Driver seat slide sensor configuration mismatch B1BA7 Occupant classification system verification required B1BA8 Occupant classification ECU out of calibration Not calibrated B1BBA Passenger seat weight sensor supply circuit B1BBC Occupant classification system negative system weight B1BBD Occupant classification ECU current configuration table unprogrammed B1C23 Passenger seat weight sensor front LH configuration mismatch B1C24 Passenger seat weight sensor front RH configuration mismatch B1C25 Passenger seat weight sensor rear LH configuration mismatch B1C26 Passenger seat weight sensor rear RH configuration mismatch B1CB2 Occupant classification ECU parameter table incompatible B210D Battery voltage low B210E Battery voltage high SUPPLEMENTAL RESTRAINT SYSTEM SRS SYSTEM CONSTRUCTION 92B 17 Diagnostic trouble Inspection item Code No B2206 Chassis number does not match B2212 Occupant classification ECU internal B2250 Occupant classification ECU not programmed Flash reguired B2262 Occupant classification ECU electrostatic discharge event detected U0020 CAN B Bus off performance U0021 CAN B Bus circuit open U0022 CAN B Bus shorted to circuit ground U0023 CAN B Bus t shorted to circuit power su
17. ffers a severe impact from the front side The side air bag deploys when a center of side body suffers a severe impact The front air bags and pre tensioner may not work under the following conditions e A frontal collision is less than the specific value e The collision is from the rear e The collision is from the side e The vehicle rolls over or is in a similar position The side airbags and curtain air bags may not work under the following conditions e The collision is from the front e The collision is from the rear Driver s and passenger s front air bags side air bags knee air bag curtain air bags and seat belts with pre tensioner have been installed to all the vehicles as standard The SRS is a system that is effective with the seat belt fastened and it is designed as a supple mental system of the seat belt M2521000100994 e The advanced air bag system has been adopted to the driver s and passenger s front sides When a frontal impact exceeds the threshold upon a frontal collision or depending on the seat position driver s seat side the air bag inflates the cushion air bag in two stages improving the protection for the front seat passengers When a frontal impact exceeds the threshold the knee air bag is instantaneously inflated to protect the passenger s feet knee and leg The side airbag is activated when an impact exceeds the threshold upon a side collision and the cushion air bag is instantaneous
18. g module Section A A Inflator Air bag module AC607285 AC The driver s air bag module incorporates a three spoke steering wheel The driver s air bag module is an assembly part consisting of an air bag inflator and their fasteners The air bag is made from nylon and inflates by gas from the inflator As a driver 52B 12 SUPPLEMENTAL RESTRAINT SYSTEM SRS SYSTEM CONSTRUCTION is being pressed to the air bag it deflates discharg ing gas from two vents at the rear of the air bag to reduce the shock from the impact The driver s air bag deploys by changing its inflation pressure in two steps The inflator has two squib connectors to deploy the air bag in two steps The inflator does not contain sodium azide CLOCK SPRING M2521001100072 The clock spring consists of a flat cable rotator stator etc The Rotator Damper plate flat cable is loosely wound in the case in coil form One end is Flat cable attached to the rotator and the other end is attached to the sta Aff tor By turning the steering wheel the clock spring rotator turns along with the steering shaft The flat cable is wound or unwound by the rotator according to how the steering wheel rd turns It must be in the neutral position when assembling the LEES Stator clock spring NOTE For the clock spring centering procedures refer to the AC101314AD SERVICE MANUAL Anti vibration sheet PASSENGER S FRONT AIR BAG MODULE
19. he short spring short circuits the power supply side terminal and ground side terminal of squibs and prevents the static electricity from generating the potential difference This connector mechanism is adopted for the following connectors Wiring harness side connector 000000000000 EOIOOOOO 000000000000 Connector connected Wiring harness side connector terminal to short circuit Terminal to short circuit Ss e000000000000000 EO do oooooooooooooo Short spring Partition panel Short spring l SRS ECU side wiring harness side connector connector AC507316 AC SRS ECU connector Connector between the clock spring and body side wiring harness Each air bag module connector Each pre tensioner connector
20. ly inflated to protect the chest area of the front seat passen gers The curtain air bag is activated simultaneously with the side airbag upon a side collision to pro tect the heads of the front seat and second seat passengers All the air bag modules are equipped with the inflator that does not contain toxic sodium azide The seat belt pre tensioner is activated simulta neously with the deployment of driver s and pas senger s front air bags in case of a frontal collision Seat belts are pulled in to eliminate the slack upon a collision thus improving the initial occupant restraint and reducing the travel dis tance of the occupants For the driver s seat in addition to the seat belt pre tensioner for the shoulder side the lap pre tensioner has been installed on the outer seat belt lower anchor side in order to improve the restraining performance in the waist and the chest areas SUPPLEMENTAL RESTRAINT SYSTEM SRS 92B 3 GENERAL INFORMATION Driver s air bag module Seat belt with pre tensioner 7 mi at al is mx System Component Parts The SRS consists of driver s and passenger s front air bag modules knee air bag modules side airbag modules curtain air bag modules SRS ECU air bag control unit front impact sensors side impact sen sors SRS warning light passenger s air bag OFF indicator light passenger s seat belt warning light clock spring seat belt pre tensioner seat bel
21. m B1BOE Passenger s front air bag module 2nd squib system squib circuit open B1BOF Passenger s front air bag module 2nd squib system short circuit between squib circuit terminals B1B10 Driver s knee air bag module squib system shorted to squib circuit ground B1B11 Driver s knee air bag module squib system shorted to squib circuit power supply B1B12 Driver s knee air bag module squib system squib circuit open B1B13 Driver s knee air bag module squib system short circuit between squib circuit terminals B1B18 Curtain air bag module LH Squib system shorted to squib circuit ground B1B19 Curtain air bag module LH squib system shorted to squib circuit power supply B1B1A Curtain air bag module LH squib system squib circuit open B1B1B Curtain air bag module LH squib system short circuit between squib circuit terminals B1B20 Curtain air bag module RH squib system shorted to squib circuit ground B1B21 Curtain air bag module RH squib system shorted to squib circuit power supply B1B22 Curtain air bag module RH squib system squib circuit open B1B23 Curtain air bag module RH squib system short circuit between squib circuit terminals B1B50 seat belt switch LH circuit ground side shorted B1B51 seat belt switch LH circuit power supply side shorted B1B52 seat belt switch LH circuit open
22. ngle M2521002600014 Section A A Air bag Cover AC608525 AC609476AB At the frontal collision the knee air bag deploys by the gas generated from the inflator to protect passen ger s feet knee and leg Like the air bags for frontal collision the side air bags are made of nylon whose inside is rubber coated and is folded up and housed in a cover Gas exhaust openings are provided at the sewed sections of the air bags to reduce the impacts on the passenger s feet at deployment An inflator that does not contain sodium aziae is used M2521004000290 Air bag module AC609459AB The side airbag made of nylon fabric The air bags are compactly folded and stored under the cover On the side of the air bag there are holes through which gas is partially released to alleviate shock to the occupant when the air bag is deployed An inflator that does not contain sodium azide is used 52B 14 SUPPLEMENTAL RESTRAINT SYSTEM SRS SYSTEM CONSTRUCTION CURTAIN AIR BAG MODULE The curtain air bag module consists of an air bag an inflator and the fixing gear relating to those parts and is installed in the roof side sections from the driver s and the passenger s front pillars to the rear pillars The air bag is made from nylon with the inside coated with silicon and housed in the roof side sec tions folded up compactly FRONT IMPACT SENSOR M2521000500226 Curtain air bag mo
23. nt impact sensor LH communication error U0171 Front impact sensor RH communication error U0172 Side impact sensor LH communication error U0175 Side impact sensor RH communication error U0184 Audio CAN timeout U0195 Satellite radio tuner CAN timeout U0197 Hands free Module CAN timeout U1414 Defective Coding Data U1415 Coding not completed Data fail 52B 24 SUPPLEMENTAL RESTRAINT SYSTEM SRS SYSTEM CONSTRUCTION DATA LIST OUTPUT The following items can be read by the scan tool from the SRS ECU input data Display on M U T III Check conditions Normal conditions SRS warning light ON e Ignition switch ON OFF request After warning lamp pre check Ignition switch ON ON During warning lamp pre check Pass SRS light ON Ignition switch ON request After warning light pre check Ignition switch ON ON During warning light pre check Driver s seatbelt switch Ignition switch ON Fastened After warning light pre check Wear the driver seatbelt Ignition switch ON Unfastened After warning light pre check Undo the driver seatbelt Passenger s seatbelt Ignition switch ON Fastened switch After warning light pre check Wear the passenger seatbelt Ignition switch ON Unfastened After warning light pre check Undo the passenger seatbelt Passenger seat airbag Ignition switch ON Permission ignition After warning light pre check Apply a load to the passenger seat Ignition swit
24. pply U0024 CAN B Bus circuit open U0025 CAN B Bus shorted to circuit ground U0026 CAN B Bus shorted to circuit power supply U0141 ETACS CAN timeout U0151 SRS ECU CAN timeout U0155 Combination meter CAN timeout U0164 A C ECU CAN timeout U0168 KOS ECU or WCM CAN timeout U0184 Audio CAN timeout U0195 Satellite radio tuner CAN timeout U0197 Hands free module CAN timeout U0245 Audio visual navigation unit CAN timeout U1419 The signal from a weight sensor front LH is unusual U141A The signal from a weight sensor front RH is unusual U141B The signal from a weight sensor rear LH is unusual U141C The signal from a weight sensor rear RH is unusual U1423 The signal from a weight sensor is unusual DATA LIST OUTPUT The following items can be read by the scan tool from the occupant classification ECU input data Display on M U T III Check conditions Normal conditions Passenger weight Apply a load to the passenger seat 2 048 Kg 4 515 Ib to 2 048 Kg 4 515 Ib Dr seat position sensor current Slide the seat the back end to the front position 0 to 4 095 93 mA Dr seat position sensor voltage Slide the seat the back end to the front position 0 to 5 000 mV Dr seat position sensor status Slide the seat the back end to the front position Not in Frontal Zone In Frontal Zone Undetermined occupant classification status Apply a load to the passenger se
25. ring unit Plate cover Bushing y Base cartridge Piston Rack Piston ring Roller bag operates in ahead of the SRS airbag deployment to e seat weight sensor Accuracy Check e Zero calibration M2521008000429 AC609471AB restrain the forward travel of the passenger at the frontal collision for achieving the effective SRS air SUPPLEMENTAL RESTRAINT SYSTEM SRS 52B 19 Roller Clearance Sleeve AC105418 AC Roller Connection Pinion N Sleeve Pinion gear Rack gear Piston VEE da Force direction Gas generator AC105077AC SYSTEM CONSTRUCTION Seatbelt pretensioner operation 1 When the pretensioner is inactivated the clearance between the roller and the sleeve is secured and thus the sleeve rotates freely The spool which winds the seatbelt rotates together as with the sleeve 2 At the frontal collision SRS ECU which has detected the impact exceeding the threshold from the front impact sensors is energized to ignite the gas generator Then the gas is generated and the gas pressure moves up the piston 3 When the piston moves up the rack gear of the piston is engaged with the pinion gear of the pinion to rotate the pinion When the pinion rotates the pinion is tilted to move the roller to the center and the pinion sleeve and spool are incorporated 92B 20 Rotates with spool Force direction AC105078 AC SUPPLEMENTA
26. s an ignite signal to the driver s and passenger s front air bag modules if the front impact sensor in the engine compartment the front analog G sensor and front safing G sensor in the SRS ECU simultaneously detect gravitational impact upon front impact Further SRS ECU starts an ignite signal for the side and curtain air bag module upon sideways gravitational impact that is simultaneously detected by the analog G sensor of the side impact sensor and the side airbag safing G sensor inside the SRS ECU DIAGNOSTIC TROUBLE CODE OUTPUT The SRS ECU diagnoses the following items and stores a diagnostic trouble code in the non volatile memory EEPROM when a problem is detected Therefore the memory is not deleted after a battery terminal is disconnected The diagnostic trouble code memory can be deleted by the scan tool M2521007000631 The SRS ECU is provided with the following capabil ities e Backup power supply in case of power failure in collisions e Boosting function in case of battery voltage drop e Self diagnosis function to avoid system s opera tion errors and improve its reliability DIAGNOSTIC FUNCTION The SRS ECU has the following functions to make system checking using the scan tool easy e Diagnostic trouble code output e Service data output e Actuator test Diagnostic trouble Inspection item Code No B1206 Passenger s air bag OFF indicator light open circuit B1
27. t e Sit as far back as possible from the air bag e ALWAYS use SEAT BELTS and CHILD RESTRAINTS SEAT BELT PRETENSIONER CAUTION THIS ASSEMBLY CONTAINS AN EXPLOSIVE INITIATOR DANGER FLAMMABLE MATERIAL TO PREVENT PERSONAL INJURY e DO NOT REMOVE INSTALL IT INTO ANOTHER VEHICLE e SERVICE OR DISPOSE OF IT AS DIRECTED IN THE REPAIR MANUAL e DO NOT DISMANTLE INCINERATE OR BRING INTO CONTACT WITH ELECTRICITY Label contents SUPPLEMENTAL RESTRAINT SYSTEM SRS 52B 9 GENERAL INFORMATION H WARNING SRS AIR BAG MODULE FLAMMABLE EXPLOSIVE TO AVOID SERIOUS INJURY e DO NOT REPAIR DISASSEMBLE OR TAMPER e AVOID CONTACT WITH FLAME OR ELECTRICITY e DO NO DIAGNOSIS USE NO TEST EQPT OR PROBES e STORE BELOW 200 F 93 C e BEFORE DOING ANY WORK INVOLVING MODULE READ SERVICE MANUAL FOR IMPORTANT FURTHER DATA DANGER CONTAINS HIGH PRESSURE GAS AND FLAMMABLE MATERIAL To avoid injury NEVER Repair Disassembly Incinerate Bring into contact with electricity Install onto another vehicle or Store where the temperature is above 93 C 200 F See Repair Manual for details SRS SIDE AIRBAG WARNING TO AVOID SERIOUS INJURY OR DEATH e Do not lean against the door e Do not use seat covers See owner s manual for more information K lt EXCEPT CANADA gt This Vehicle is Equipped with Advanced Air Bags Even with Advanced Air Bags Children can be killed or seriously injured by the air bag
28. t switch seat slide sensor occupant classification ECU and weight sensor Driver s and passenger s front air bag modules are located in the center of the steering wheel and above the glove box The knee air bag module has been installed to the instrument panel lower section under the steering column Side air bags are located inside the front seatback frame The curtain air bag module has been installed onto the roof side section from front pillar and back end of rear pillar Each air bag consists of a folded air bag and an inflator unit On all air bag modules the infla tor does not contain sodium azide The SRS ECU placed on the forefront of the floor monitors the sys tem and has a front air bag safing G sensor front air Passenger s front air bag module ex Side airbag module Knee air bag module AC609360 AB bag analog G sensor and a side airbag safing G sensor The front impact sensor is assembled in the front end upper bar to monitor impact in case of front impact The side impact sensors inside the cen ter pillars monitor the shock incurred by the sides of the vehicle The SRS warning light on the combina tion meter indicates the operational status of the SRS The clock spring is installed in the steering col umn The seat belt pre tensioner is built into the driver s and passenger s front seat belt retractor The seat slide sensor is installed at the seat adjuster sec tion of the driver seat in order to de
29. tect the driver seat slide position The weight sensor is installed underneath a rail of the passenger seat to detect the load on the seat The occupant classification ECU mounted under the front passenger s seat deter mines the occupant class according to the signals from the weight sensors and sends signals to SRS ECU The passenger s air bag OFF indicator light is installed to the lower left of the center panel and illuminates when the passenger s front air bag 52B 4 SUPPLEMENTAL RESTRAINT SYSTEM SRS GENERAL INFORMATION is inactive The passenger s seat belt warning light is installed to the lower right of the center panel and illuminates when the passenger is not wearing the seat belt The seat belt switch detects whether the seat belt is used The SRS ECU will start a squib ignition current to the driver s passenger s front air bag module knee air bag module and seat belt pre tensioner when simul taneously detecting frontal impact with the front impact sensor front air bag safing G sensor and front air bag analog G sensor It will also supply a squib ignition current to the side airbag module and curtain air bag module when simultaneously detect ing side impact with the side impact sensor and side airbag safing G sensor SUPPLEMENTAL RESTRAINT SYSTEM SRS 52B 5 GENERAL INFORMATION CONSTRUCTION DIAGRAM lt Vehicles for USA gt SRS warning light Vehicle po awe s identification a zp DE ACA
30. uit terminals B1C38 Driver s pre tensioner squib system shorted to squib circuit ground B1C39 Driver s pre tensioner squib system shorted to squib circuit power supply B1C3A Driver s pre tensioner squib system squib circuit open B1C3B Driver s pre tensioner Squib system short circuit between squib circuit terminals B1C47 Front passenger s pre tensioner squib system shorted to squib circuit ground B1C48 Front passenger s pre tensioner squib system shorted to squib circuit power supply B1C49 Front passenger s pre tensioner squib system Squib circuit open B1C4A Front passenger s pre tensioner squib system short circuit between squib circuit terminals B210D Battery abnormal low voltage B212C Open circuit to IG1 power supply fuse No 12 circuit B212D Open circuit to G1 power supply fuse No 18 circuit B2207 Occupant restraint controller internal 1 B2208 Occupant restraint controller internal 2 B2209 Occupant restraint controller internal 3 B220A Occupant restraint controller internal 4 B220B Occupant restraint controller firing stored energy B220C Occupant restraint controller accelerometer 1 B220D Occupant restraint controller accelerometer 2 B223D OCM Occupant Classification ECU DTC present U0019 Bus off CAN B U0141 ETACS CAN timeout U0154 Occupant classification ECU CAN timeout U0155 Combination meter CAN timeout U0164 A C ECU CAN timeout U0168 KOS ECU or WCM CAN timeout U0170 Fro
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