THEFT DETERRENT SYSTEM Intrusion Sensor Circuit

DESCRIPTION


Tech Tips

In the following situations, the intrusion sensor (theft warning ultrasonic sensor) may operate and cause the automatic alarm system to operate even when the sensor is normal.


  • The driver steps away from the vehicle while other people, pets, etc. are in the vehicle.

  • There are things which move easily inside the vehicle, such as things hanging inside the vehicle or clothing hanging from the coat hooks.

  • A window or the sliding roof is open.

  • The vehicle is parked in a place with a lot of vibration or noise such as a parking garage.

  • The vehicle is being washed using a high-pressure spray gun or an automatic car washing machine.

  • The vehicle is continuously being struck or is vibrating due to hail or lightning.

  • The vehicle is continuously being subjected to impacts or is vibrating when snow or ice is being removed from the vehicle.

  • A frost prevention sheet which has an aluminum film is moved by wind, etc.

WIRING DIAGRAM

A01GYRWE05

INSPECTION PROCEDURE

Note


  • If the certification ECU is replaced, refer to the Service Bulletin.

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

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (INTRUSION SENSOR SOUND DETECT)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Entry&Start / Data List.

    5. According to the display on the intelligent tester, read the Data List.

    6. Make a metal-on-metal striking sound (such as by shaking keys) near the intrusion sensor and check the Data List.

      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Intrusion Sensor Sound Detect*1, *2 Intrusion sensor sound detection / ON or OFF

      ON: Intrusion sensor detecting sound

      OFF: Intrusion sensor not detecting sound

      		 Only displays "ON" on the Data List once. When checking again, disconnect and reconnect the intelligent tester.

      • *1: w/ Emergency Call Switch

      Note


      • *2: Perform the intrusion sensor operation inspection with the intelligent tester disconnected Click here.

      • Make sure all the windows are closed

      Tech Tips

      When performing the above inspection, have the electrical key transmitter in the vehicle exterior detection area to perform certification (this prevents the alarm from sounding).

      OK
      The display on the intelligent tester changes according to the detection condition of the intrusion sensor.

    NG

    CHECK INTRUSION SENSOR (IOUT) Click here

    OK

  2. READ VALUE USING INTELLIGENT TESTER (INTRUSION SENSOR)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Entry&Start / Data List.

    5. According to the display on the intelligent tester, read the Data List.

    6. From inside the vehicle, put your hand in front of the sensor and move it back and forth a distance of 0.3 m (0.984 ft.) and check the Data List.

      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Intrusion Sensor Status of the intrusion sensor detection / ON or OFF

      ON: Intrusion sensor detected

      OFF: Intrusion sensor not detected

      		 -

      Tech Tips

      When performing the above inspection, have the electrical key transmitter in the vehicle exterior detection area to perform certification (this prevents the alarm from sounding).

      OK
      The display on the intelligent tester changes according to the detection condition of the intrusion sensor (theft warning ultrasonic sensor).

    NG

    CHECK INTRUSION SENSOR (IOUT) Click here

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  3. CHECK INTRUSION SENSOR (IOUT)


    1. Using an oscilloscope, check the waveform.

      A01H0G6E01
      Text in Illustration
      *a

      Component with harness connected

      (Map Light Assembly)

      		 *b IOUT Initial Signal
      *c IOUT Initial Response *d Approximately 1.0 seconds
      *e Initial Diagnosis *f Approximately 1.0 to 1.6 seconds
      *g Approximately 0.05 seconds *h Approximately 5.5 seconds
      *i Disarmed State *j Arming Preparation State
      Measurement Condition
      Tester Connection Content
      Tester Connection X6-1 (IOUT) - Body ground
      Tool Setting 2 V/DIV., 100 ms./DIV.
      Condition Theft deterrent system is set (system changes from disarmed state to arming preparation state)

      Tech Tips


      • If the intrusion sensor (theft warning ultrasonic sensor) is normal, an initial response is output in response to the HI input from the certification ECU.

      • If the waveform output remains LO, there may be a problem with the certification ECU, as there is no input from the certification ECU.

      OK
      The waveform displays properly (HI is 6.5 V or higher and LO is below 1 V).

    NG

    REPLACE CERTIFICATION ECU

    OK

  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - MAP LIGHT ASSEMBLY)


    1. Disconnect the L16 certification ECU connector.

    2. Disconnect the X6 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L16-4 (IOUT) - X6-1 (IOUT) Always Below 1 Ω
      L16-4 (IOUT) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK MAP LIGHT ASSEMBLY


    1. Temporarily replace the map light assembly with a new or normally functioning one Click here.

    2. Check that the theft deterrent system functions operate normally Click here.

      OK
      Theft deterrent system functions operate normally

    NG

    REPLACE INTRUSION SENSOR (THEFT WARNING ULTRASONIC SENSOR)

    OK

    END (MAP LIGHT ASSEMBLY WAS DEFECTIVE)