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DI-320
                                                      DIAGNOSTICS         -   SUPPLEMENTAL RESTRAINT SYSTEM
                                                                                                                            DI1BI-24




  DTC                     B0133/62                          Short in P/T Squib (RH) Circuit (to B+)

CIRCUIT DESCRIPTION
The P/T squib (RH) circuit consists of the airbag sensor assembly and seat belt pretensioner (RH).
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 B0133/62 is recorded when a B+ short is detected in the P/T squib (RH) circuit.
     DTC No.                           DTC Detecting Condition                                              Trouble Area
                     S Short circuit in seat belt pretensioner (RH) wire harness
                                                                                   S Seat belt pretensioner (RH)
                       (to B+)
    B0133/62                                                                       S Airbag sensor assembly
                     S P/T squib (RH) malfunction
                                                                                   S Wire harness
                     S Airbag sensor assembly malfunction


WIRING DIAGRAM
See page DI-310 .

INSPECTION PROCEDURE

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




    2      Check P/T squib (RH) circuit.

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


                                                                 NG           Repair or replace harness or connector be-
 H01019                                                                       tween seat belt pretensioner (RH) and airbag
 AB0119
 H08394                                            H08268                     sensor assembly.


   OK




2002 ECHO (RM884U)

                                                                                     Author :                      Date :     490
                                                                                                     DI-321
                                         DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



   3        Check airbag sensor assembly.

                                             PREPARATION:
                                             (a) Connect the connector to the airbag sensor assembly.
 P/T Squib (RH)         Airbag               (b) Using a service wire, connect PR+ and PR- of the con-
                        Sensor
                        Assembly
                                                   nector (on the seat belt pretensioner side) between the
                                                   seat belt pretensioner (RH) and the airbag sensor assem-
                                                   bly.
                                             (c) Connect negative (-) terminal cable to the battery, and
  PR+           PR-                                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 B0133/62             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-
       CG       Tc                                 conds.
H01020
                                             (e) Check DTC (See page DI-239 ).
H02139 AB0119
H10600 H01081                       H10625   OK:
                                                   DTC B0133/62 is not output.
                                             HINT:
                                             Codes other than code B0133/62 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 :             491
DI-322
                                        DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



   4        Check P/T squib (RH).

                                             PREPARATION:
                                             (a) Turn the ignition switch to LOCK.
                                             (b) Disconnect negative (-) terminal cable from the battery,
                      Airbag                       and wait at least for 90 seconds.
 P/T Squib (RH)
                      Sensor
                      Assembly               (c) Connect the seat belt pretensioner (RH) connector.
                                             (d) Connect negative (-) terminal cable to the battery, and
                                                   wait at least for 2 seconds.
                                             CHECK:
                                             (a) Turn the 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 ).
         DLC3                                (c) Turn the ignition switch to LOCK, and wait at least for 20
                         DTC B0133/62
                                                   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 ).
 H01021
                                             OK:
 AB0119
 H10600 H01081                      H10626         DTC B0133/62 is not output.
                                             HINT:
                                             Codes other than code B0133/62 may be output at this time, but
                                             they are not relevant to this check.

                                               NG         Replace seat belt pretensioner (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. 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 :              492



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