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                                                                                                                        DI-259
                                                         DIAGNOSTICS    -   SUPPLEMENTAL RESTRAINT SYSTEM
                                                                                                                         DI18R-33




  DTC                       B0101/14                           Open in D Squib Circuit

CIRCUIT DESCRIPTION
The D squib circuit consists of the airbag sensor assembly, spiral cable and steering wheel pad.
It causes the airbag to deploy when the airbag deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS-2 .
DTC B0101/14 is recorded when an open is detected in the D squib circuit.
    DTC No.                            DTC Detecting Condition                                           Trouble Area
                      S Open circuit in D+ wire harness or D- wire harness of
                                                                                 S Steering wheel pad (D squib)
                        squib
                                                                                 S Spiral cable
    B0101/14          S D squib malfunction
                                                                                 S Airbag sensor assembly
                      S Spiral cable malfunction
                                                                                 S Wire harness
                      S Airbag sensor assembly malfunction


WIRING DIAGRAM
See page DI-254 .

INSPECTION PROCEDURE

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




   2      Check D squib circuit.

                                                               CHECK:
                                                               For the connector (on the spiral cable side) between the spiral
                                           Airbag              cable and the steering wheel pad, measure the resistance be-
               Spiral
                                           Sensor              tween D+ and D-.
               Cable
                                           Assembly            OK:
D Squib
                                                                     Resistance: Below 1 




                 D-                   D+



                      (-)       (+)
H01001
H02142                                                H02196     NG         Go to step 5.


  OK




2002 ECHO (RM884U)

                                                                                  Author :                    Date :     429
DI-260
                                         DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



   3       Check airbag sensor assembly.

                                             PREPARATION:
                                             (a) Connect the connector to the airbag sensor assembly.
                 Spiral
                             Airbag          (b) Using a service wire, connect D+ and D- of the connector
                             Sensor                (on the spiral cable side) between the spiral cable and the
                 Cable
                             Assembly
 D Squib                                           steering wheel pad.
                                             (c) Connect 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-
   D-                D+
                                                   conds.
                                             (b) Clear DTC stored in memory. (See page DI-239 )
                                             (c) Turn the ignition switch to LOCK, and wait at least for 20
                                                   seconds.
         DLC3             DTC B0101/14
                                             (d) Turn the ignition switch to ON, and wait at least for 20 se-
                                                   conds.
                                             (e) Check DTC. (See page DI-239 )
                                             OK:
    CG          Tc
H01002
                                                   DTC B0101/14 is not output.
H02144 AB0119                                HINT:
H10600 W02044                      H10602

                                             Codes other than code B0101/14 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 :              430
                                                                                                      DI-261
                                        DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



   4        Check D squib.

                                              PREPARATION:
                                              (a) Turn the ignition switch to LOCK.
                                              (b) Disconnect negative (-) terminal cable from the battery,
D Squib                   Airbag
                Spiral    Sensor
                                                    and wait at least for 90 seconds.
                Cable     Assembly            (c) Connect the steering wheel pad connector.
                                              (d) Connect 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 DTC stored in memory. (See page DI-239 )
                                              (c) Turn the ignition switch to LOCK, and wait at least for 20
       DLC3              DTC B0101/14               seconds.
                                              (d) Turn the ignition switch to ON, and wait at least for 20 se-
                                                    conds.
                                              (e) Check DTC. (See page DI-239 )
                                              OK:
       CG       Tc
H01003                                              DTC B0101/14 is not output.
AB0119
H10600 W02044                        H10603   HINT:
                                              Codes other than code B0101/14 may be output at this time, but
                                              they are not relevant to this check.

                                                NG        Replace steering wheel pad.


  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 :              431
DI-262
                                                 DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



    5     Check spiral cable.

                                                      PREPARATION:
                                                      Disconnect the connector between the airbag sensor assembly
D Squib
            Spiral                    Airbag          and the spiral cable.
                                      Sensor
            Cable                     Assembly
                                                      CHECK:
                                                      For the connector (on the spiral cable side) between the spiral
                                                      cable and the steering wheel pad, measure the resistance be-
                                                      tween D+ and D-.
                                                      OK:
                                                            Resistance: Below 1 
             D-                  D+



                  (-)      (+)
H01000
H02142                                       H02195



                                                        NG         Repair or replace spiral cable.


   OK



    6     Check harness between airbag sensor assembly and spiral cable.

                                                      CHECK:
                                      Airbag          For the connector (on the spiral cable side) between the airbag
           Spiral                     Sensor          sensor assembly and the spiral cable, measure the resistance
           Cable                      Assembly
                                                      between D+ and D-.
D Squib
                                                      OK:
                                                            Resistance: Below 1 



             D-                  D+


                  (-)      (+)
                                                        NG         Repair or replace harness or connector be-
 H01004                                                            tween airbag sensor assembly and spiral cable.
 H02142                                      H10604




   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 :             432



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