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                                                                                                                             DI-275
                                                DIAGNOSTICS        -      SUPPLEMENTAL RESTRAINT SYSTEM
                                                                                                                              DI1B7-30




  DTC                B0106/54                         Open in P Squib Circuit

CIRCUIT DESCRIPTION
The P squib circuit consists of the airbag sensor assembly and front passenger airbag assembly.
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 B0106/54 is recorded when an open is detected in the P squib circuit.
    DTC No.                      DTC Detecting Condition                                              Trouble Area
                S Open circuit in P+ wire harness or P- wire harness of
                                                                               S Front passenger airbag assembly (P squib)
                  squib
    B0106/54                                                                   S Airbag sensor assembly
                S P squib malfunction
                                                                               S Wire harness
                S Airbag sensor assembly malfunction


WIRING DIAGRAM
See page DI-271 .

INSPECTION PROCEDURE

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




   2       Check P squib circuit.

                                                       CHECK:
                                                       For the connector (on the front passenger airbag assembly
 P Squib
                            Airbag                     side) between the front passenger airbag assembly and the air-
                            Sensor                     bag sensor assembly, measure the resistance between P+ and
                            Assembly                   P-.
                                                       OK:
                                                             Resistance: Below 1 



                     P-           P+


                      (-)      (+)
                                                           NG          Repair or replace harness or connector be-
R14286                                                                 tween front passenger airbag assembly and air-
H02142                                       H02251
                                                                       bag sensor assembly.


  OK




2002 ECHO (RM884U)

                                                                                Author :                   Date :             445
DI-276
                                          DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



    3       Check airbag sensor assembly.

                                              PREPARATION:
  P Squib                                     (a) Connect the connector to the airbag sensor assembly.
                       Airbag                 (b) Using a service wire, connect P+ and P- of the connector
                       Sensor                       (on the front passenger airbag assembly side) between
                       Assembly                     the front passenger airbag assembly and the airbag sen-
                                                    sor assembly.
                                              (c) Connect negative (-) terminal cable to the battery, and
                                                    wait at least for 2 seconds.
                             ON
   P-             P+                          CHECK:
                                              (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 )
        DLC3                                  (c) Turn the ignition switch to LOCK, and wait at least for 20
                          Code B0106/54
                                                    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 )
 H01023
                                              OK:
 H02144 AB0119
 H10600 H01078                       H10613         DTC B0106/54 is not output.
                                              HINT:
                                              Codes other than code B0106/54 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 :             446
                                                                                                   DI-277
                                     DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



   4       Check P squib.

                                           PREPARATION:
                                           (a) Turn the ignition switch to LOCK.
 P Squib
                     Airbag                (b) Disconnect negative (-) terminal cable from the battery,
                     Sensor                      and wait at least for 90 seconds.
                     Assembly              (c) Connect the front passenger airbag assembly 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
                         DTC B0106/54            seconds.
       DLC3
                                           (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
                                                 DTC B0106/54 is not output.
H01024
AB0119
H10600 H01078                     H10614   HINT:
                                           Codes other than code B0106/54 may be output at this time, but
                                           they are not relevant to this check.

                                             NG        Replace front passenger airbag assembly.


   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 :              447



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