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DI-342
                                                DIAGNOSTICS           -   SUPPLEMENTAL RESTRAINT SYSTEM
                                                                                                                        DI6ZW-03




  DTC                B1140/32                        Side Airbag Sensor Assembly (RH)
                                                     Malfunction

CIRCUIT DESCRIPTION
The side airbag sensor assembly (RH) consists of the safing sensor, diagnosis circuit and lateral decelera-
tion sensor, etc.
It receives signals from the lateral deceleration sensor, judges whether or not the SRS must be activated,
and diagnosis system malfunction.
DTC B1140/32 is recorded when occurrence of a malfunction in the side airbag sensor assembly (RH) is
detected.
    DTC No.                      DTC Detecting Condition                                             Trouble Area
                                                                              S Side airbag sensor assembly (RH)
    B1140/32     S Side airbag sensor assembly (RH) malfunction               S Wire harness
                                                                              S Airbag sensor assembly


WIRING DIAGRAM



         S6
         Side Airbag Sensor Assembly (RH)                                                      Airbag Sensor Assembly



                                           4                                             7
                                                             GR
                                 ESR                                                    C5    ESR
                                                             (*1)


                                                                                         9
                                          3                  LG
                                 FSR                                                    C5    FSR
                                                             (*1)


                                                                                        10
                                          2                  L-Y
                                SSR+                                                    C5    SSR+
                                                             (*1)


                                                                                        12
                                           1                      P
                                VUPR                                                    C5    VUPR
                                                             (*1)




           *1 : w/ SideAirbag

                                                                                                                        H01450




2002 ECHO (RM884U)

                                                                                Author :                   Date :         512
                                                                                                  DI-343
                                      DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM

INSPECTION PROCEDURE

  1       Is DTC B1140/32 output?

                                          CHECK:
                                          (a) Turn ignition switch to ON and wait at least for 20 se-
                ON                              conds.
                                          (b) Clear DTC stored in memory (See step 5 on page
                                                DI-239 ).
                                          (c) Turn ignition switch to LOCK, and wait at least for 20 se-
                                                conds.
        DLC3           DTC B1140/32       (d) Turn ignition switch to ON and wait at least for 20 se-
                                                conds.
                                          (e) Check DTC (See page DI-239 ).
                                          HINT:
    CG          Tc
                                          Codes other than code B1140/32 may be output at this time, but
                                          they are not relevant to this check.
       AB0119
H10600 H09528                    H12860

                                            YES         The malfunctioning part can now be considered
                                                        normal. To make sure of this, use the simulation
                                                        method to check.


  NO



  2       Is connector of side airbag sensor assembly (RH) properly connected?




  3       Prepare for inspection (See step 1 on DI-390 ).




2002 ECHO (RM884U)

                                                              Author :           Date :            513
DI-344
                                               DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



   4       Check wire harness.

                                                     PREPARATION:
                                                     (a) Disconnect the side airbag sensor assembly (RH) con-
 Side Airbag Sensor                                        nector.
 Assembly (RH)
                                 Airbag              (b) Using a service wire, connect SSR and ESR of the con-
                                 Sensor                    nector (on the side airbag sensor assembly side) between
                                 Assembly                  the side airbag sensor assembly (RH) and airbag sensor
                                                           assembly.
                                                     CHECK:
                                                     For the connector (on the airbag sensor assembly side) be-
                           Airbag Sensor             tween the side airbag sensor assembly (RH) and the airbag
  SSR                      Assembly                  sensor assembly, measure the resistance between SSR and
                                                     ESR.
                                                     OK:
  ESR                                                      Resistance: Below 1 

                           (+)
                             SSR
                     (-)                    ESR
H01015
                                            H01160
                                                       NG        Repair or replace harness or connector be-
H01058 H01036
                                                                 tween side airbag sensor assembly (RH) and
                                                                 airbag sensor assembly.


   OK




2002 ECHO (RM884U)

                                                                       Author :            Date :             514
                                                                                                           DI-345
                                              DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



  5      Check wire harness.

                                                    PREPARATION:
Side Airbag Sensor                                  Using a service wire, connect VUPR and FSR of the connector
Assembly (RH)                                       (on the side airbag sensor assembly side) between the side air-
                              Airbag
                              Sensor                bag sensor assembly (RH) and airbag sensor assembly.
                              Assembly              CHECK:
                                                    For the connector (on the airbag sensor assembly side) be-
                                                    tween the side airbag sensor assembly (RH) and the airbag
                                                    sensor assembly, measure the resistance between VUPR and
                                                    FSR.
                           Airbag Sensor
                           Assembly                 OK:
            VUPR
                                                          Resistance: Below 1 

            FSR


                     VUPR              FSR
                     (+)
           (-)
H01015
H01059
                                           H01161
                                                      NG        Repair or replace harness or connector be-
H01037
                                                                tween side airbag sensor assembly (RH) and
                                                                airbag sensor assembly.


  OK




2002 ECHO (RM884U)

                                                                      Author :            Date :             515
DI-346
                                                   DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



    6       Check wire harness (to ground).

                                                         CHECK:
  Side Airbag Sensor
  Assembly (RH)                                          For the connector (on the airbag sensor assembly side) be-
                                     Airbag              tween the side airbag sensor assembly (RH) and the airbag
                                     Sensor
                                                         sensor assembly, measure the resistance between body
                                     Assembly
                                                         ground and each of SSR, VUPR and FSR.
                                                         OK:
                                                               Resistance: Below 1 
                 Airbag Sensor Assembly



                           VUPR
                                         FSR

           (-)           (+)
H01013                                                     NG        Repair or replace harness or connector be-
H01038                         SSR              H01162
                                                                     tween side airbag sensor assembly (RH) and
                                                                     airbag sensor assembly.



   OK



    7       Check wire harness (to B+).

          ON                                             CHECK:
           Side Airbag Sensor                            (a) Turn ignition switch to ON.
           Assembly (RH)               Airbag            (b) For the connector (on the airbag sensor assembly side)
                                       Sensor                between the side airbag sensor assembly (RH) and the
                                       Assembly              airbag sensor assembly, measure the voltage between
                                                             the body ground and each of SSR, VUPR, ESR and FSR.
                                                         OK:
                       Airbag Sensor Assembly                Voltage: 0 V


                           SSR            FSR

                          VUPR                             NG        Repair or replace harness or connector be-
 AB0119
                 (-)      (+)                   ESR                  tween side airbag sensor assembly (RH) and
 H01013
 H01039                                         H08270               airbag sensor assembly.


   OK




2002 ECHO (RM884U)

                                                                           Author :            Date :         516
                                                                                                   DI-347
                                       DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



  8        Is DTC B1140/32 output again?

                                            PREPARATION:
                                            (a) Connect the connector to the side airbag sensor assem-
 Side Airbag Sensor
 Assembly (RH)                                    bly (RH).
                        Airbag
                                            (b) Connect the connector to the airbag sensor assembly.
                        Sensor
                        Assembly            (c) Connect negative (-) terminal cable to the battery, and
                                                  wait at least for 2 seconds.
                                            CHECK:
                     
                                            (a) Turn ignition switch to ON and wait at least for 20 se-
            ON                                    conds.
                                            (b) Clear DTC stored in memory (See step 5 on page
                                                  DI-239 ).
                                            (c) Turn ignition switch to LOCK, and wait at least for 20 se-
                        DTC B1140/32              conds.
        DLC3
                                            (d) Turn ignition switch to ON and wait at least for 20 se-
                                                  conds.
                                            (e) Check DTC (See page DI-239 ).
      CG        Tc                          OK:
                                                  DTC B1140/32 is not output.
H01012 AB0119
H10600 H01065                      H12861   HINT:
                                            Codes other than code B1140/32 may be output at this time, but
                                            they are not relevant to this check.

                                              NG         Go to step 9.


  OK



 From the results of the above inspection, the malfunctioning part can now be considered normal.
 To make sure of this, use the simulation method to check.




2002 ECHO (RM884U)

                                                               Author :           Date :            517
DI-348
                                        DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



   9        Check airbag sensor assembly.

                                             PREPARATION:
                                             (a) Turn ignition switch to LOCK.
 Side Airbag Sensor                          (b) Disconnect negative (-) terminal cable from the battery,
 Assembly (LH)           Airbag
                                                   and wait at least for 90 seconds.
                         Sensor
                         Assembly            (c) Disconnect the side airbag sensor (RH) from the connec-
                                                   tor and connect the side airbag sensor (LH) to the con-
                                                   nector.
                      
                                             (d) Connect negative (-) terminal cable to the battery, and
             ON                                    wait at least for 2 seconds.
                                             CHECK:
                                             (a) Turn ignition switch to ON and wait at least for 20 se-
                                                   conds.
                         DTC B1140/32
            DLC3                             (b) Clear DTC stored in memory (See step 5 on page
                                                   DI-239 ).
                                             (c) Turn ignition switch to LOCK, and wait at least for 20 se-
                                                   conds.
       CG        Tc                          (d) Turn ignition switch to ON and wait at least for 20 se-
                                                   conds.
 H01012 AB0119
 H10600 H01065                      H12862   (e) Check DTC (See page DI-239 ).
                                             OK:
                                                   DTC B1140/32 is not output.
                                             HINT:
                                             Codes other than code B1140/32 may be output at this time, but
                                             they are not relevant to this check.

                                               NG         Replace airbag sensor assembly.


   OK




2002 ECHO (RM884U)

                                                                Author :            Date :            518
                                                                                                   DI-349
                                       DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



 10        Check side airbag sensor assembly (RH).

                                            PREPARATION:
                                            (a) Turn ignition switch to LOCK.
                                            (b) Disconnect negative (-) terminal cable from the battery,
                        Airbag                    and wait at least for 90 seconds.
                        Sensor              (c) Connect the side airbag sensor (RH) to the connector that
Side Airbag Sensor      Assembly
                                                  the side airbag sensor (LH) was connected to.
Assembly (RH)
                                            (d) Connect negative (-) terminal cable to the battery, and
                                                  wait at least for 2 seconds.
                ON
                                            CHECK:
                                            (a) Turn ignition switch to ON and wait at least for 20 se-
                                                  conds.
                        DTC B1141/33        (b) Clear DTC stored in memory (See page DI-239 ).
       DLC3                                 (c) Turn ignition switch to LOCK, and wait at least for 20 se-
                                                  conds.
                                            (d) Turn ignition switch to ON and wait at least for 20 se-
                                                  conds.
    CG          Tc                          (e) Check DTC (See page DI-239 ).
                                            OK:
H01007 AB0119
H10600 H01066                      H12863         DTC B1141/33 is not output.
                                            HINT:
                                            Codes other than code B1141/33 may be output at this time, but
                                            they are not relevant to this check.

                                              NG         Replace side airbag sensor assembly (RH).


  OK



 From the results of the above inspection, the malfunctioning part can now be considered normal.
 To make sure of this, use the simulation method to check.




2002 ECHO (RM884U)

                                                               Author :           Date :            519



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