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                                                                                                                           DI-307
                                                       DIAGNOSTICS        -    SUPPLEMENTAL RESTRAINT SYSTEM
                                                                                                                            DI1NJ-14




  DTC                     B0118/46                          Short in Side Squib (LH) Circuit (to B+)

CIRCUIT DESCRIPTION
The side squib (LH) circuit consists of the airbag sensor assembly and side airbag assembly (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS-2 .
DTC B0118/46 is recorded when a B+ short is detected in the side squib (LH) circuit.
    DTC No.                            DTC Detecting Condition                                             Trouble Area
                     S Short circuit in side squib (LH) wire harness (to B+)        S Side airbag assembly (LH)
    B0118/46         S Side squib (LH) malfunction                                  S Airbag sensor assembly
                     S Airbag sensor assembly malfunction                           S Wire harness


WIRING DIAGRAM
See page DI-297 .

INSPECTION PROCEDURE

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




   2        Check side squib (LH) circuit.

          ON                                                  CHECK:
                                                              (a) Turn the ignition switch to ON.
                                                              (b) For the connector (on the side airbag assembly side) be-
                                       Airbag                     tween the side airbag assembly (LH) and the airbag sen-
          Squib (LH)                   Sensor
                                       Assembly                   sor assembly, measure the voltage between SFL+ and
                                                                  body ground.
                                                              OK:
                                                                  Voltage: 0 V

                                               SFL+


               (-)        (+)
 AB0119
 H01016                                                          NG            Repair or replace harness or connector be-
 H02119                                            H08265                      tween side airbag assembly (LH) and airbag
                                                                               sensor assembly.


   OK




2002 ECHO (RM884U)

                                                                                     Author :                     Date :    477
DI-308
                                              DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



    3         Check airbag sensor assembly.

  Squib (LH)                                      PREPARATION:
                                                  (a) Connect the connector to the airbag sensor assembly.
                             Airbag               (b) Using a service wire, connect SFL+ and SFL- of the con-
                             Sensor
                                                        nector (on the side airbag assembly side) between the
                             Assembly
                                                        side airbag assembly (LH) and the airbag sensor assem-
                                                        bly.
                                                  (c) Connect the negative (-) terminal cable to the battery,
                                                        and wait at least for 2 seconds.
                                    ON
                                                  CHECK:
  SFL-                SFL+
                                                  (a) Turn the ignition switch to ON and wait at least for 20 se-
                                                        conds.
                                                  (b) Clear the DTC stored in memory (See step 5 on page
                                                        DI-239 ).
          DLC3                 DTC B0118/46
                                                  (c) Turn the ignition switch to LOCK, and wait at least for 20
                                                        seconds.
                                                  (d) Turn the ignition switch to ON and wait at least for 20 se-
         CG      Tc                                     conds.
 H01017
                                                  (e) Check the DTC (See page DI-239 ).
 W03860 AB0119
 H10600 H01072                           H12858   OK:
                                                        DTC B0118/46 is not output.
                                                  HINT:
                                                  Codes other than code B0118/46 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 :            478
                                                                                                       DI-309
                                            DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



  4        Check side squib (LH).

                                                PREPARATION:
Squib (LH)                                      (a) Turn the ignition switch to LOCK.
                                                (b) Disconnect the negative (-) terminal cable from the bat-
                          Airbag
                                                      tery, and wait at least for 90 seconds.
                          Sensor
                          Assembly              (c) Connect the side airbag assembly (LH) connector.
                                                (d) Connect the negative (-) terminal cable to the battery,
                                                      and wait at least for 2 seconds.
                                                CHECK:
                     ON
                                                (a) Turn the ignition switch to ON and wait at least for 20 se-
                                                      conds.
                                                (b) Clear the DTC stored in memory (See step 5 on page
                                                      DI-239 ).
        DLC3                 DTC B0118/46       (c) Turn the ignition switch to LOCK, and wait at least for 20
                                                      seconds.
                                                (d) Turn the ignition switch to ON and wait at least for 20 se-
                                                      conds.
      CG        Tc                              (e) Check the DTC (See page DI-239 ).
H01018                                          OK:
AB0119
H10600 H01072                          H12859         DTC B0118/46 is not output.
                                                HINT:
                                                Codes other than code B0118/46 may be output at this time, but
                                                they are not relevant to this check.

                                                  NG          Replace side airbag assembly (LH).


  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. If the malfunctioning part can not be
 detected by the simulation method, replace all SRS components including the wire harness.




2002 ECHO (RM884U)

                                                                    Author :           Date :            479



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