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                                                                                                                         DI-263
                                                    DIAGNOSTICS          -   SUPPLEMENTAL RESTRAINT SYSTEM
                                                                                                                          DI4L2-12




  DTC                    B0102/11                         Short in D Squib Circuit (to Ground)

CIRCUIT DESCRIPTION
The D squib circuit consists of the airbag sensor assembly, spiral cable and steering wheel pad.
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 B0102/11 is recorded when a ground short is detected in the D squib circuit.
    DTC No.                          DTC Detecting Condition                                              Trouble Area
                   S Short circuit in D squib wire harness (to ground)            S Steering wheel pad (D squib)
                   S D squib malfunction                                          S Spiral cable
    B0102/11
                   S Spiral cable malfunction                                     S Airbag sensor assembly
                   S Airbag sensor assembly malfunction                           S Wire harness


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
 D Squib                             Airbag                cable and the steering wheel pad, measure the resistance be-
               Spiral
               Cable
                                     Sensor                tween D+ and body ground.
                                     Assembly
                                                           OK:
                                                                 Resistance: 1 M or Higher



                                    D+



                   (-)        (+)

H01001
                                                               NG            Go to step 5.
H02145                                           H02198




   OK




2002 ECHO (RM884U)

                                                                                   Author :                    Date :     433
DI-264
                                            DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



   3       Check airbag sensor assembly.

                                                  PREPARATION:
                                                  (a) Connect the connector to the airbag sensor assembly.
                              Airbag              (b) Using a service wire, connect D+ and D- of the connector
                 Spiral                                 (on the spiral cable side) between the spiral cable and the
                              Sensor
                 Cable
                              Assembly                  steering wheel pad.
 D Squib
                                                  (c) Connect negative (-) terminal cable to the battery, and
                           
                                                        wait at least for 2 seconds.
                                                  CHECK:
     D-               D+      ON                  (a) Turn the ignition switch to ON, and wait at least for 20 se-
                                                        conds.
                                                  (b) Clear DTC stored in memory (See step 5 on page
                                                        DI-239 ).
         DLC3              DTC B0102/11           (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.
                                                  (e) Check DTC (See page DI-239 ).
    CG           Tc
 H01002                                           OK:
 H02144 AB0118
 H10600 W02042                           H10605         DTC B0102/11 is not output.
                                                  HINT:
                                                  Codes other than code B0102/11 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 :              434
                                                                                                      DI-265
                                        DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



   4       Check D squib.

                                              PREPARATION:
                                              (a) Turn the ignition switch to LOCK.
     
                          Airbag
                                              (b) Disconnect negative (-) terminal cable from the battery,
                Spiral    Sensor                    and wait at least for 90 seconds.
                Cable     Assembly            (c) Connect the steering wheel pad connector.
D Squib
                                              (d) Connect negative (-) terminal cable to the battery, and
                                                    wait at least for 2 seconds.
                  ON                          CHECK:
                                              (a) Turn the ignition switch to ON, and wait at least for 20 se-
                                                    conds.
                                              (b) Clear DTC stored in memory (See step 5 on page
       DLC3              DTC B0102/11               DI-239 ).
                                              (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 DTC (See page DI-239 ).
H01003                                        OK:
AB0119
H10600 W02042                        H10606         DTC B0102/11 is not output.
                                              HINT:
                                              Codes other than code B0102/11 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. 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 :              435
DI-266
                                                    DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



    5      Check spiral cable.

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



                 (-)       (+)
H01000
                                                 H02200
                                                            NG        Repair or replace spiral cable.
H02145




   OK



    6      Check harness between airbag sensor assembly and spiral cable.

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




                            D+

                     (-)   (+)
 H01004
 H02145                                          H10607
                                                            NG        Repair or replace harness between airbag sen-
                                                                      sor assembly and spiral cable.


   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 :             436



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