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DI-358
                                                  DIAGNOSTICS    -   SUPPLEMENTAL RESTRAINT SYSTEM
                                                                                                                       DI6PU-04




  DTC             B1142/B1143/34                       Door Side Airbag Sensor (RH) Malfunc-
                                                       tion (2-Door only)

CIRCUIT DESCRIPTION
The door side airbag sensor (RH) circuit consists of the airbag sensor assembly and door side airbag sensor
(RH).
For details of the function of each component, see OPERATION on page RS-2 .
DTC B1142/B1143/34 is recorded when a malfunction is detected in the door side airbag sensor (RH) circuit.
    DTC No.                        DTC Detecting Condition                                       Trouble Area
                                                                         S Door side airbag sensor (RH)
                                                                         S Airbag sensor assembly
 B1142/B1143/34   S Door side airbag sensor (RH) malfunction
                                                                         S Instrument panel wire harness
                                                                         S RH front door wire harness


WIRING DIAGRAM




 D20
 Door Side Airbag Sensor (RH)                                                                      Airbag Sensor Assembly



                                                                2                                 3
                                       W-G                                   W-G
                    DMR+                                       IH1                               C5 DMR+
                               2       (*1)                                  (*1)




                                                                1                                4
                                         B-L                                 B-L
                     DMR-                                      IH1                               C5 DMR-
                               1         (*1)                                (*1)




*1 : 2 - Door w/ Side Airbag                                                                                           H02750




2002 ECHO (RM884U)

                                                                           Author :                    Date :            528
                                                                                                           DI-359
                                                  DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM

INSPECTION PROCEDURE

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




  2      Check wire harness (to B+).

Door Side Airbag Sensor                               CHECK:
(RH)                                                  (a) Turn the ignition switch to ON.
                                       Airbag         (b) For the connector (on the airbag sensor assembly side)
                                       Sensor             between the door side airbag sensor (RH) and the airbag
                                       Assembly           sensor assembly, measure the voltage between body
                                                          ground and each of DMR+ and DMR-.
                            Airbag Sensor
                                                      OK:
         ON                 Assembly
                                                          Voltage: Below 1 V


                            DMR-            DMR+


                     (-)         (+)
H03355                      V
AB0119
H17655                                       H17660
                                                         NG         Go to step 8.


  OK



  3      Check wire harness (to ground).

Door Side Airbag                                      CHECK:
Sensor (RH)                                           For the connector (on the airbag sensor assembly side) be-
                                   Airbag             tween the door side airbag sensor (RH) and the airbag sensor
                                   Sensor             assembly, measure the resistance between body ground and
                                   Assembly           each of DMR+ and DMR-.
                                                      OK:
                    Airbag Sensor
                    Assembly                                Resistance: 1 M or Higher




                      DMR-                DMR+

              (-)          (+)
H03355
                                                         NG         Go to step 9.
H17653                                       H17661



  OK

2002 ECHO (RM884U)

                                                                          Author :           Date :         529
DI-360
                                                 DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



    4       Check wire harness.

 Door Side Airbag                                    CHECK:
 Sensor (RH)                                         For the connector (on the airbag sensor assembly side) be-
                                 Airbag              tween the door side airbag sensor (RH) and the airbag sensor
                                 Sensor              assembly, measure the resistance between DMR+ and DMR-.
                                 Assembly
                                                     OK:
                                                           Resistance: 1 M or Higher
                     Airbag Sensor
                     Assembly



                      DMR-       DMR+
                                   (+)

                                           (-)
 H03355                                                NG          Go to step 10.
 H17654                                    H17662




   OK



    5       Check wire harness.

 Door Side Airbag                                    PREPARATION:
 Sensor (RH)
                                                     Using a service wire, connect DMR+ and DMR- of the connec-
                                     Airbag          tor (on the door side airbag sensor (RH) side) between the air-
                                     Sensor
                                                     bag sensor assembly and the door side airbag sensor (RH).
                                     Assembly
                                                     CHECK:
                                                     For the connector (on the airbag sensor assembly side) be-
  DMR-             DMR+ Airbag Sensor                tween the door side airbag sensor (RH) and the airbag sensor
                        Assembly
                                                     assembly, measure the resistance between DMR+ and DMR-.
                                                     OK:
                                      DMR+                 Resistance: Below 1 
                                       (+)

                          DMR-               (-)

 H03353
 H03360   H17654                           H17663      NG          Go to step 11.


   OK




2002 ECHO (RM884U)

                                                                          Author :           Date :            530
                                                                                                   DI-361
                                        DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



  6      Check door side airbag sensor (RH).

Door Side Airbag                            CHECK:
Sensor (RH)                                 For the connector of the door side airbag sensor (RH), measure
                             Airbag
                                            the resistance between DMR+ and DMR-.
                             Sensor         OK:
                             Assembly             Resistance: 300 - 1500 




          DMR+        DMR-




              (+)    (-)
H04504
H01062                             H08346
                                               NG         Replace door side airbag sensor (RH).


  OK




2002 ECHO (RM884U)

                                                                Author :           Date :           531
DI-362
                                              DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



    7       Check airbag sensor assembly.

                                                    PREPARATION:
   Door Side Airbag
   Sensor (RH)                                      (a) Turn the ignition switch to LOCK.
                                                    (b) Disconnect negative (-) terminal cable from the battery,
                                Airbag
                                                          and wait at least for 90 seconds.
                                Sensor
                                Assembly            (c) Connect the door side airbag sensor (RH) connector and
                                                          airbag sensor assembly connector.
                  
                                                    (d) Connect negative (-) terminal cable to the battery, and
                      ON                                  wait at least for 2 seconds.
                                                    CHECK:
                                                    (a) Turn the ignition switch to ON, and wait at least for 20 se-
                                                          conds.
          DLC3                                      (b) Clear the DTC stored in memory (See page DI-239 ).
                           DTC B1142/B1143/34       (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 ).
 H04502
                                                    OK:
 AB0119
 H10600 H08007                             H12035         DTC 34 is not output.
                                                    HINT:
                                                    Codes other than code 34 may be output at this time, but they
                                                    are not relevant to this check.

                                                      NG        Replace airbag sensor 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 :              532
                                                                                                          DI-363
                                               DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



   8      Check RH front door wire harness (to B+).

Door Side Airbag                                   PREPARATION:
Sensor (RH)                                        Disconnect the RH front door wire harness connector on the air-
                                    Airbag         bag sensor assembly side.
                                    Sensor         CHECK:
                                    Assembly       (a) Turn the ignition switch to ON.
                                                   (b) For the connector (on the RH front door wire harness
         ON     RH Front Door                           side) between the airbag sensor assembly and the RH
                Wire Harness
                                                        front door wire harness, measure the voltage between
                             DMR+         DMR-          body ground and each of DMR+ and DMR-.
                                                   OK:
          (-)          (+)                              Voltage: Below 1 V

H03354                                                NG         Repair or replace RH front door wire harness.
AB0119
H03364                                    H08348



  OK



 Repair or replace harness or connector between airbag sensor assembly and RH front door wire
 harness.



   9      Check RH front door wire harness (to ground).

Door Side Airbag                                   PREPARATION:
Sensor (RH)                                        Disconnect the RH front door wire harness connector on the air-
                                    Airbag         bag sensor assembly side.
                                    Sensor         CHECK:
                                    Assembly       For the connector (on the RH front door wire harness side) be-
                                                   tween the airbag sensor assembly and the RH front door wire
                                                   harness, measure the resistance between body ground and
  RH Front Door
                                                   each of DMR+ and DMR-.
  Wire Harness             DMR+        DMR-        OK:
                                                         Resistance: 1 M or Higher

          (-)        (+)
                                                      NG         Repair or replace RH front door wire harness.
H03354
H03362                                    H08349



  OK



 Repair or replace harness or connector between airbag sensor assembly and RH front door wire
 harness.


2002 ECHO (RM884U)

                                                                       Author :           Date :            533
DI-364
                                                DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



  10       Check RH front door wire harness.

 Door Side Airbag   RH Front Door Wire              PREPARATION:
                    Harness
 Sensor (RH)                                        Disconnect the RH front door wire harness connector on the air-
                                     Airbag         bag sensor assembly side.
                                     Sensor         CHECK:
                                     Assembly       For the connector (on the RH front door wire harness side) be-
                                                    tween the airbag sensor assembly and the RH front door wire
                                                    harness, measure the resistance between DMR+ and DMR-.
            DMR+                   DMR-             OK:
                                                          Resistance: 1 M or Higher




                    (+)      (-)
 H03354
 H09507                                    H08351
                                                      NG          Repair or replace RH front door wire harness.


   OK



  Repair or replace harness or connector between airbag sensor assembly and RH front door wire
  harness.




2002 ECHO (RM884U)

                                                                         Author :           Date :            534
                                                                                                           DI-365
                                              DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



 11        Check RH front door wire harness.

                     RH Front Door Wire             PREPARATION:
Door Side Airbag
                     Harness                        (a) Disconnect the RH front door wire harness connector on
Sensor (RH)
                                                          the airbag sensor assembly side.
                                  Airbag
                                  Sensor            (b) Using a service wire, connect DMR+ and DMR- of the
                                  Assembly                connector (on the RH front door wire harness side) be-
                   
                                                          tween the RH front door wire harness and the door side
                                                          airbag sensor (RH).
                                                    CHECK:
DMR-            DMR+ DMR+                 DMR-
                                                    For the connector (on the RH front door wire harness side) be-
                                                    tween the airbag sensor assembly and the RH front door wire
                                                    harness, measure the resistance between DMR+ and DMR-.
                                                    OK:
                            (+)      (-)
                                                          Resistance: Below 1 
H03352
H03360 H09507                              H08350



                                                      NG        Repair or replace RH front door wire harness.


  OK



 Repair or replace harness or connector between airbag sensor assembly and RH front door wire
 harness.




2002 ECHO (RM884U)

                                                                      Author :           Date :             535



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