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                                                                                                                   DI-671
                                             DIAGNOSTICS    -   BODY CONTROL SYSTEM
                                                                                                                    DI6LZ-03




 Passenger buckle switch and seat belt warning occupant detec-
 tion sensor

CIRCUIT DESCRIPTION
This circuit detects the conditions of the passenger buckle switch and the seat belt warning occupant detec-
tion sensor, and makes the passenger seat belt warning flash.

WIRING DIAGRAM


                                                                                                     Body ECU
                       S16                                                 D26                       (Integration Relay)
                                                                           DIODE
                       Seat Belt Warning
                       Occupant Detection Sensor                           (Buckle SW)
                                                           (*1) P-B        2       1   P (*1)
                           SENSOR
                                                    5                                             3    9
               P                             P-B
                                                   II2                                           I13 I16 PBKL
         C         1                     2                             (*2) R-B
   J23                                                                                           (*2) (*1)
   J/C                   Buckle Switch
                                                   6
         C     P                             W-B
                                                   II2
                   7                     3
                                                                                       W-B
                                                                J/C
                                                           B          B
                                    W-B
                                                           J3         J2

                              ED




                                   (*1) w/ Door Lock Control
                                   (*2) w/o Door Lock Control

                                                                                                                      I18650




 2001 SIENNA (RM787U)

                                                                       Author :                 Date :              825
DI-672
                                   DIAGNOSTICS   -   BODY CONTROL SYSTEM

INSPECTION PROCEDURE

   1     Check passenger buckle switch. (See page BE-43 )


                                          NG         Replace the passenger buckle switch.


  OK



   2     Check seat belt warning occupant Detection sensor. (See page BE-43 )


                                          NG         Replace the seat belt warning occupant Detec-
                                                     tion sensor.


  OK



   3     Check wireharness and connector between seat belt warning occupant Detec-
         tion sensor and body ECU, passenger buckle switch and seat belt warning occu-
         pant Detection sensor, passenger buckle switch and body ground.


                                          NG         Repair or replace wireharness or connector.


  OK



  Proceed to next circuit inspection shown on
  problem symptoms table.
  (See page DI-636 )




2001 SIENNA (RM787U)

                                                           Author :           Date :           826

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