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THEFT DETERRENT SYSTEM Theft Warning Siren Circuit

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DTC Code DTC Name
  Theft Warning Siren Circuit
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DESCRIPTION

The theft warning siren assembly sounds if either of the following conditions is met:


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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

  • Inspect the fuses for circuits related to this system before performing the following procedure.

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PROCEDURE


  1. Click here

    PERFORM ACTIVE TEST USING GTS (SECURITY HORN2)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Active Test.

    5. Perform the Active Test according to the display on the GTS.


      1. Body Electrical > Main Body > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Security Horn2 Theft warning siren assembly OFF/ON -



      1. Body Electrical > Main Body > Active Test
        Tester Display
        Security Horn2




      OK
      The theft warning siren assembly sounds and stops correctly when operated using the GTS.
      Result
      Proceed to
      OK
      NG

  2. Click here

    CHECK HARNESS AND CONNECTOR (BATTERY - THEFT WARNING SIREN ASSEMBLY - BODY GROUND)


    1. B00684LC08
      *a

      Front view of wire harness connector

      (to Theft Warning Siren Assembly)

      Disconnect the T48 theft warning siren assembly connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      T48-1 (+B) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      T48-3 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - THEFT WARNING SIREN ASSEMBLY)


    1. Disconnect the O1 main body ECU (multiplex network body ECU) connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      O1-18 (SSCL) - T48-2 (CONT) Always Below 1 Ω
      O1-18 (SSCL) or T48-2 (CONT) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. Click here

    REPLACE THEFT WARNING SIREN ASSEMBLY


    1. Temporarily replace the theft warning siren assembly with a new or known good one.

      Tip:

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

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    CHECK THEFT WARNING SIREN ASSEMBLY


    1. Turn the engine switch on (IG), then off.

    2. Set the theft deterrent system to "ARMED STATE".

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    3. Check that the security indicator changes from illuminated to blinking.

    4. Change the theft deterrent system to "ALARM SOUNDING STATE".

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    5. Check that the theft warning siren assembly is sounding.

      OK
      Theft warning siren assembly is sounding.
      Result
      Proceed to
      OK
      NG

    • OK

      END (THEFT WARNING SIREN ASSEMBLY WAS DEFECTIVE)

    • NG

      REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)Click here