Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 20vff citheftd

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05-1874
                                         DIAGNOSTICS            -   THEFT DETERRENT SYSTEM                               05BA5-06




THEFT DETERRENT HORN CIRCUIT

CIRCUIT DESCRIPTION
When the theft deterrent system is operating, the relay in the multiplex network body ECU turns ON and OFF
in a cycle of approx. 0.2 seconds, causing the theft deterrent (security) horn to sound.

WIRING DIAGRAM
                                                                                             Instrument Panel J/B Assy


                                                                                                 B8
                                                                                                 Multiplex Network
                                                                                                 Body ECU
                                                      J/C
                                               6              23
                        GR                                                       GR
                                               J3             J4                                 SH
                                                                                             1




          1
              T1
              Security Horn Assy




                                                                                                                         B67843




INSPECTION PROCEDURE
   1      INSPECT SECURITY HORN ASSY

                                                    (a)      Check operation of the horn.
                                                             Standard:
                                                              Measurement Condition                Specified Condition
                                                          Battery positive (+)  Terminal 1
                                                                                                      Horn blows
                                                          Battery negative (-)  Horn body




                                      B67851
                                                      NG            REPLACE SECURITY HORN ASSY

   OK




2005 SIENNA REPAIR MANUAL (RM1163U)

                                                                             Author :             Date :                   2057
                                                                                                              05-1875
                                         DIAGNOSTICS   -   THEFT DETERRENT SYSTEM

   2      CHECK WIRE HARNESS (MULTIPLEX NETWORK BODY ECU) - SECURITY HORN
          ASSY)

 Wire Harness Side
                                               (a)   Disconnect the B8 ECU connector.
                                               (b)   Disconnect the T1 security horn connector.
         B8                                    (c)   Check the resistance between the wire harness side con-
         Multiplex Network Body ECU                  nectors.
                                                     Standard:
                                                           Terminal No.                 Specified Condition
                                                        B8-1 (SH) - T1-1                    Below 1 




            T1
            Security Horn Assy

                       1


B69123
                                                 NG        REPAIR OR          REPLACE      HARNESS              AND
B58961                                B68016               CONNECTOR

  OK

 REPLACE MULTIPLEX NETWORK BODY ECU




2005 SIENNA REPAIR MANUAL (RM1163U)

                                                                   Author :         Date :                      2058

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