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DI-366
                                                  DIAGNOSTICS    -   SUPPLEMENTAL RESTRAINT SYSTEM
                                                                                                                       DI6PV-04




  DTC             B1144/B1145/35                       Door Side Airbag Sensor (LH) Malfunc-
                                                       tion (2-Door only)

CIRCUIT DESCRIPTION
The door side airbag sensor (LH) circuit consists of the airbag sensor assembly and door side airbag sensor
(LH).
For details of the function of each component, see OPERATION on page RS-2 .
DTC B1144/B1145/35 is recorded when malfunction is detected in the door side airbag sensor (LH) circuit.
    DTC No.                        DTC Detecting Condition                                       Trouble Area
                                                                         S Door side airbag sensor (LH)
                                                                         S Airbag sensor assembly
 B1144/B1145/35   S Door side airbag sensor (LH) malfunction
                                                                         S Instrument panel wire harness
                                                                         S LH front door wire harness


WIRING DIAGRAM




 D19
 Door Side Airbag Sensor (LH)                                                                      Airbag Sensor Assembly



                                                                2                                 4
                                         W-G                                 W-G
                     DML+                                      IG1                               C3 DML+
                               2         (*1)                                (*1)




                                                                1                                 3
                                         B-L                                 B-L
                     DML-                                      IG1                               C3 DML-
                               1          (*1)                               (*1)




 *1 : 2 - Door w/ Side Airbag                                                                                          H02750




2002 ECHO (RM884U)

                                                                           Author :                    Date :            536
                                                                                                            DI-367
                                                 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:
(LH)                                                   (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 (LH) and the airbag
                                     Assembly              sensor assembly, measure the voltage between body
                                                           ground and each of DML+ and DML-.
                               Airbag Sensor
                               Assembly                OK:
         ON
                                                           Voltage: Below 1 V


                       DML+           DML-
              (-)        (+)
H03355
AB0119
H17658                                        H17664
                                                         NG        Go to step 8.


  OK



   3     Check wire harness (to ground).

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




          DML+                 DML-

                               (+)      (-)
                                                         NG        Go to step 9.
H03355
H17656                                        H17665



  OK

2002 ECHO (RM884U)

                                                                         Author :           Date :           537
DI-368
                                                   DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



   4       Check wire harness.

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




               DML+           DML-
                                       (-)


H03355                                 (+)               NG          Go to step 10.
H17657                                       H17666




   OK



   5       Check wire harness.

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


                                             (+)
 H03353
 H03360   H17657                             H17667      NG          Go to step 11.


   OK




2002 ECHO (RM884U)

                                                                            Author :           Date :          538
                                                                                                   DI-369
                                        DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



  6      Check door side airbag sensor (LH).

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




          DML+        DML-




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


  OK




2002 ECHO (RM884U)

                                                                Author :           Date :           539
DI-370
                                            DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



    7       Check airbag sensor assembly.

                                                  PREPARATION:
   Door Side Airbag
   Sensor (LH)                                    (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 (LH) 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         DTC B1144/B1145/35          (b) Clear the DTC stored in memory (See page 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 the DTC (See page DI-239 ).
 H04502
                                                  OK:
 AB0119
 H10600 H08036                           H12036         DTC 35 is not output.
                                                  HINT:
                                                  Codes other than code 35 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 :              540
                                                                                                          DI-371
                                               DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



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

Door Side Airbag                                   PREPARATION:
Sensor (LH)                                        Disconnect the LH 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 LH front door wire harness side)
         ON     LH Front Door                           between the airbag sensor assembly and the LH front
                Wire Harness
                                                        door wire harness, measure the voltage between body
                             DML+         DML-          ground and each of DML+ and DML-.
                                                   OK:
          (-)          (+)                              Voltage: Below 1 V

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



  OK



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



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

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

          (-)        (+)

H03354                                                NG         Repair or replace LH front door wire harness.
H03362                                    H08349




  OK



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

2002 ECHO (RM884U)

                                                                       Author :           Date :            541
DI-372
                                                 DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



  10       Check LH front door wire harness.

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




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


   OK



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




2002 ECHO (RM884U)

                                                                          Author :           Date :            542
                                                                                                           DI-373
                                              DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM



 11        Check LH front door wire harness.

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



                                                      NG        Repair or replace LH front door wire harness.


  OK



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




2002 ECHO (RM884U)

                                                                      Author :           Date :             543



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