THEFT DETERRENT SYSTEM(w/ Entry and Start System) Theft Warning Siren Circuit

DESCRIPTION

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


WIRING DIAGRAM

A01X7OWE01

CAUTION / NOTICE / HINT

Note


  • When replacing the theft warning siren assembly, refer to the Service Bulletin.

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

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (THEFT WARNING SIREN)


    1. Operate the intelligent tester according to the steps on the display and select "Active Test".

      Entry&Start
      Tester Display Test Part Control Range Diagnostic Note
      Security Horn2 Theft warning siren ON / OFF -
      OK
      Siren operates normally.

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

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


    1. A01XBAQE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Theft Warning Siren Assembly)

      Disconnect the K46 theft warning siren assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K46-5 (+B) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K46-2 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - THEFT WARNING SIREN)


    1. Disconnect the E30 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the K46 theft warning siren assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E30-7 (SSCL) - K46-4 (CONT) Always Below 1 Ω
      E30-7 (SSCL) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG (except Hood Courtesy Switch Connector 4 Pin Type) B
      NG (for Hood Courtesy Switch Connector 4 Pin Type) C

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    C

    CHECK HARNESS AND CONNECTOR (HOOD LOCK ASSEMBLY - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY AND THEFT WARNING SIREN) Click here

    A

  4. CHECK THEFT WARNING SIREN (OPERATION)


    1. Temporarily replace the theft warning siren assembly with a new or known good one (refer to the Service Bulletin).

    2. Check that the theft warning siren operates normally.

      OK
      Operates normally.

    OK

    END (THEFT WARNING SIREN ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  5. CHECK HARNESS AND CONNECTOR (HOOD LOCK ASSEMBLY - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY AND THEFT WARNING SIREN)


    1. Disconnect the E30 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the A8 hood lock assembly connector.

    3. Disconnect the K46 theft warning siren assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A8-1 (SLF+) - E30-7 (SSCL) Always Below 1 Ω
      A8-3 (SLF-) - K46-4 (CONT) Always Below 1 Ω
      A8-1 (SLF+) - Body ground Always 10 kΩ or higher
      A8-3 (SLF-) - Body ground Always 10 kΩ or higher

    OK

    REPLACE HOOD LOCK ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR