es350rm2028002-1000y_s000s_739d1_t0099_325_332

1、RS325SUPPLEMENTAL RESTRAINT SYSTEM OCCUPANT CLASSIFICATION SYSTEMDIAGNOSTIC TROUBLE CODE CHARTHINT: When DTC B1650/32 is detected as a result of troubleshooting for the AIRBAG SYSTEM, perform troubleshooting for the OCCUPANT CLASSIFICATION SYSTEM as shown in the chart below. Use the intelligent test

2、er to read and clear the DTC of the occupant classification ECU, otherwise the DTCs cannot be read and cleared.RSOCCUPANT CLASSIFICATION SYSTEMDTC CodeDetection ItemTrouble AreaPassenger Airbag ON/ OFF Indicator (OFF Indicator)See pageB1771Passenger Side Buckle Switch Circuit Malfunction1. Front sea

3、t wire RH2. Front seat inner belt assembly RH (Passenger side buckle switch)3. Occupant classification ECUONRS-322B1773Belt Tension Sensor Circuit Malfunction1. Front seat wire RH2. Front seat outer belt assembly RH (Seat belt tension sensor)3. Occupant classification ECUONRS-329B1774Pressure Sensor

4、 Circuit Malfunction1. Front seat wire RH2. Occupant classification sensor3. Occupant classification ECUONRS-336B1775Pressure Sensor Power Source Circuit Malfunction1. Front seat wire RH2. Occupant classification sensor3. Occupant classification ECUONRS-336B1776Seat Belt Tension Sensor Power Source

5、Circuit Malfunction1. Front seat wire RH2. Front seat outer belt assembly RH (Seat belt tension sensor)3. Occupant classification ECUONRS-329B1790Center Airbag Sensor Assembly Communication Circuit Malfunction1. Floor wire No. 22. Front seat wire RH3. Occupant classification ECU4. Center airbag sens

6、or assemblyONRS-343B1795Occupant Classification ECU MalfunctionOccupant classification ECUONRS-355B1797Calibration MalfunctionThere is no malfunction if this DTC is not output again after performing occupant classification system zero point calibration.ONRS-357RS326SUPPLEMENTAL RESTRAINT SYSTEM OCCU

7、PANT CLASSIFICATION SYSTEMDESCRIPTIONThe passenger side buckle switch circuit consists of the occupant classification ECU and the front seat inner belt assembly RH.DTC B1771 is recorded when a malfunction is detected in the passenger side buckle switch circuit. RSHINT:When DTC B1650/32 is detected a

8、s a result of troubleshooting for the AIRBAG SYSTEM, check the DTCs stored in the occupant classification ECU. When DTC B1771 is output, perform troubleshooting for the DTC.DTC No.DTC Detecting ConditionTrouble AreaB1771 The occupant classification ECU receives a line short circuit signal, and open

9、circuit signal, a short circuit to ground signal or a short circuit to B+ signal in passenger side buckle switch circuit for 2 seconds Passenger side buckle switch malfunction Occupant classification ECU malfunction Front seat wire RH Front seat inner belt assembly RH (Passenger side buckle switch)

10、Occupant classification ECUDTCB1771Passenger Side Buckle Switch Circuit Malfunc- tionRS327SUPPLEMENTAL RESTRAINT SYSTEM OCCUPANT CLASSIFICATION SYSTEMWIRING DIAGRAMRSPECTION PROCEDUREHINT: If troubleshooting (wire harnesspection) is difficult to perform, remove the front passenger seattallation bolt

11、s to see the undersurface of the seat cushion. In the above case, hold the seat so that it does not fall down. Holding the seat for a long period of time may cause a problem, such as seat rail deformation. Hold the seat only as necessary.(a)(b)Turn the engine switch on (IG).Clear the DTCs stored in

12、the occupant classification ECU (See page RS-318).Clear the DTCs stored in the center airbag sensor assembly (See page RS-49).Turn the engine switch off. Turn the engine switch on (IG).Check the DTCs (See page RS-318).(c)(d)(e)(f)1CHECK DTCT1Occupant Classification ECUFront Seat Inner Belt Assembly

13、RH (Passenger Side Buckle Switch)13T4BSW214T4BGND1H043056E28RS328SUPPLEMENTAL RESTRAINT SYSTEM OCCUPANT CLASSIFICATION SYSTEMOK:DTC B1771 is not output.HINT:Codes other than B1771 may be output at this time, but they are not related to this check. RSOKNG(a)(b)Turn the engine switch off.Disconnect th

14、e negative (-) terminal cable from the battery, and wait for at least 90 seconds.Check that the connectors are properly connected to the occupant classification ECU and the front seat inner belt assembly RH.OK:The connectors are properly connected.(c)NGOK(a)Disconnect the connectors from the occupan

15、t classification ECU and front seat inner belt assembly RH.Check that the connectors (on the center airbag sensor assembly side and front seat inner belt assembly RH) are not damaged.OK:The connectors are not deformed or damaged.HINT:If the connectors are not connected securely, reconnect(b)the conn

16、ectors and proceed to the nextpection.NGOKREPAIR OR REPLACE FRONT SEAT WIRE RH3CHECK CONNECTORSCONNECT CONNECTORS PROPERLY, THEN GO TO STEP 12CHECK CONNECTION OF CONNECTORSUSE SIMULATION METHOD TO CHECK (Seepage RS-37)RS329SUPPLEMENTAL RESTRAINT SYSTEM OCCUPANT CLASSIFICATION SYSTEM(a) Connect the n

17、egative (-) terminal cable to the battery.(b) Turn the engine switch on (IG).(c) Measure the voltage according to the value(s) in the table below.Standard voltageRSNGOK(a)(b)Turn the engine switch off.Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.Using

18、 a service wire, connect terminals 1 and 2 of connector C.NOTICE:(c)Do not forciblyert the service wire into theterminals of the connector when connecting the wire.(d)Measure the resistance according to the value(s) in the table below.Standard resistanceNGOKREPAIR OR REPLACE FRONT SEAT WIRE RHTester

19、 connectionConditionSpecified conditionT4-13 (BSW) - T4-14 (BGND)AlwaysBelow 1 WFront Seat Wire RHD CBFront Seat InnerOccupantBelt Assembly RHClassificationECUConnector CConnector B T1T412 1 2 3 4 5 6 7 8 910 11 12 13 14 15 16 17 18Service WireBSWBGNDC142484E01A5CHECK FRONT SEAT WIRE RH (OPEN)REPAIR

20、 OR REPLACE FRONT SEAT WIRE RHTester connectionConditionSpecified conditionT4-13 (BSW) - BodygroundEngine switch on (IG)Below 1 VT4-14 (BGND) - BodygroundEngine switch on (IG)Below 1 VFront Seat Wire RHDCBFront Seat InnerOccupant Belt Assembly RHClassificationECUConnector BT41 2 3 4 5 6 7 8 910 11 1

21、2 13 14 15 16 17 18BSWBGNDH101899E22A4CHECK FRONT SEAT WIRE RH (SHORT TO B+)RS330SUPPLEMENTAL RESTRAINT SYSTEM OCCUPANT CLASSIFICATION SYSTEM(a) Disconnect the service wire from connector C.(b) Measure the resistance according to the value(s) in the table below.Standard resistance RSNGOK(a) Measure

22、the resistance according to the value(s) in the table below.Standard resistanceNGOKREPAIR OR REPLACE FRONT SEAT WIRE RHTester connectionConditionSpecified conditionT4-13 (BSW) - T4-14 (BGND)Always1 MW or higherFront Seat Wire RHD CBFront Seat InnerOccupantBelt Assembly RHClassificationECUConnector B

23、T41 2 3 4 5 6 7 8 910 11 12 13 14 15 16 17 18BSWBGNDH101899E22A7CHECK FRONT SEAT WIRE RH (SHORT)REPAIR OR REPLACE FRONT SEAT WIRE RHTester connectionConditionSpecified conditionT4-13 (BSW) - BodygroundAlways1 MW or higherT4-14 (BGND) - BodygroundAlways1 MW or higherFront Seat Wire RHD CBFront Seat I

24、nnerOccupantBelt Assembly RHClassificationECUConnector BT41 2 3 4 5 6 7 8 910 11 12 13 14 15 16 17 18BSWBGNDH101899E22A6CHECK FRONT SEAT WIRE RH (SHORT TO GROUND)RS331SUPPLEMENTAL RESTRAINT SYSTEM OCCUPANT CLASSIFICATION SYSTEM(a)Connect the connectors to the occupant classification ECU and the fron

25、t seat inner belt assembly RH. Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG).Clear the DTCs stored in the occupant classification ECU (See page RS-318).Clear the DTCs stored in the center airbag sensor assembly (See page RS-49)Turn the engine switch off. Turn

26、 the engine switch on (IG).Check the DTCs (See page RS-318).OK:DTC B1771 is not output.HINT:Codes other than B1771 may be output at this time, but they are not related to this check.(b)(c)(d)RS(e)(f)(g)(h)OKNG(a)(b)Turn the engine switch off.Disconnect the negative (-) terminal cable from the batter

27、y, and wait for at least 90 seconds.Replace the front seat inner belt assembly RH (See page SB-22).HINT:(c)Perform the if possible.pection using parts from a normal vehicle(d)(e)(f)Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG).Clear the DTCs stored in the occ

28、upant classification ECU (See page RS-318).Clear the DTCs stored in the center airbag sensor assembly (See page RS-49)Turn the engine switch off. Turn the engine switch on (IG).Check the DTCs (See page RS-318).OK:DTC B1771 is not output.HINT:Codes other than B1771 may be output at this time, but they are not related to this check.(g)(h)(i)(j)OKNGEND9REPLACE FRONT SEAT INNER BELT ASSEMBLY RHUSE SIMULATION METHOD TO CHECK (Seepage RS-37)8CHECK DTCRS332SUPPL