THEFT DETERRENT SYSTEM SYSTEM DESCRIPTION


  1. THEFT DETERRENT SYSTEM DESCRIPTION

    The theft deterrent system is designed to deter vehicle break-ins and theft. If an attempted break-in or theft is detected, the vehicle horns and security horn / theft warning siren will sound and the hazard warning light will flash. The system detects an attempted break-in or theft when any of the following occurs: 1) the vehicle is forcibly entered; 2) the engine hood is forcibly opened; 3) the doors are unlocked without the use of a key; or 4) the cable from the negative (-) auxiliary battery terminal is disconnected and reconnected.

    If the system enters the alarm sounding state, any unlocked doors will automatically lock.

    The system has 4 states: disarmed state, arming preparation state, armed and alarm sounding state.

  2. FUNCTION OF MAIN COMPONENT

    Function Outline
    Security indicator Informs driver of theft deterrent system status
    Security horn

    Sounds when attempted break-in or theft is detected

    Located in engine compartment
    Theft warning siren*1

    Sounds when attempted break-in or theft is detected

    Located on luggage compartment trim cover inner RH
    Map light

    Map light has intrusion sensor cancel switch

    For vehicles equipped with tilt sensor, intrusion sensor cancel switch also functions as tilt sensor OFF switch
    Hazard warning light Begins flashing when attempted break-in or theft is detected
    Vehicle horns Sounds when attempted break-in or theft is detected
    Door courtesy light switch Detects door open status (open or closed)
    Door lock position switch Detects door lock status (locked or unlocked)
    Engine hood courtesy switch Detects engine hood open status (open or closed)
    Luggage compartment door courtesy switch Detects luggage compartment door open status (open or closed)
    Main body ECU Detects power switch condition (off or on (ACC, IG or engine running))
    Intrusion sensor*2 If intrusion is detected, alarm is activated
    Yaw rate sensor*3 After theft deterrent system is set, detects vehicle tilt. If vehicle tilt changes, certification ECU determines there was theft

    Tech Tips

    *1: w/ Theft Warning Siren

    *2: w/ Intrusion Sensor

    *3: For vehicles equipped with tilt sensor, this is a related part.

  3. SYSTEM FUNCTION


    1. Disarmed state:


      • The alarm function is not operating.

      • The theft deterrent system is not operating.

    2. Arming preparation state:


      • The theft deterrent system is not operating.

    3. Armed state:


      • The theft deterrent system is operating.

    4. Alarm sounding state:


      • The alarm function is operating.

    5. OPERATION OF INTRUSION SENSOR (w/ Intrusion Sensor)

      Note

      Ultrasonic waves are used to detect intrusion. Ultrasonic waves do not penetrate steel or glass. When any of the door glasses or sliding roof is left open, ultrasonic waves may escape. This may result in the detection of people in the surroundings, leaves or insects entering the vehicle, strong wind or other ultrasonic wave sources in the environment when the vehicle is parked with the door glasses or sliding roof open. When parking the vehicle with the door glasses or the sliding roof open for ventilation, turn off the intrusion sensor using the intrusion sensor cancel switch.


      1. An intrusion sensor is provided in the map light assembly located in the front of the vehicle interior.

      2. The certification ECU activates the intrusion sensor when the system changes from the disarmed state to the armed preparation state. If an intrusion detection signal is input from the intrusion sensor during the armed state, the certification ECU changes to the alarm state in order to output an alarm.

      3. When the system is in the disarmed state, the function of the intrusion sensor can be disabled by pressing the intrusion sensor cancel switch.

      4. The intrusion sensor may erroneously detect intrusion in the following states:


        1. Persons or pets are in the vehicle.

        2. The vehicle is parked in a place where extreme vibrations or noises occur, such as in a parking garage.

        3. Ice or snow is removed from the vehicle, causing the vehicle to receive repeated impacts or vibrations.

        4. The wind or something similar causes an externally mounted reflectively coated windshield cover to move.

        5. The intrusion sensor may react to a hanger or other objects hanging in the cabin when they drop or swing.

        6. The system changes to the armed state even when any of the door glasses or sliding roof is open. The intrusion sensor may react to objects moving outside the vehicle when any of the door glasses or sliding roof is open.

        7. The vehicle is inside an automatic or high-pressure car wash.

        8. The vehicle experiences impacts, such as hail, lightning strikes and other kinds of repeated impacts or vibrations.

    6. OPERATION OF TILT SENSOR (w/ Tilt Sensor)


      1. The tilt sensor detects pitch angle of vehicle inclination using the 2 deceleration sensors. When the tilt sensor detects a change in the pitch angle of vehicle inclination, such as a thief attempting to tow the vehicle, it transmits the warning signal to the certification ECU.

      2. The certification ECU activates the tilt sensor when the system changes from the armed preparation state to the armed state. If a warning signal is received from the tilt sensor when in the armed state, the certification ECU changes to the alarm state in order to sound the alarm.

      3. When the system is in the disarmed state, pressing the intrusion sensor cancel switch can disable the function of the tilt sensor. If the system changes to the armed state, the tilt sensor will not activate. This function is canceled each time all doors are unlocked with the entry and start system, and is reinstated when the tilt senor is on.

      4. Under the following conditions, if the vehicle tilts or the acceleration of gravity in the vertical and horizontal directions of the vehicle is detected by the tilt sensor, an alarm may occur accidentally. To avoid accidental alarm activation, turn the tilt sensor off using the intrusion sensor cancel switch.


        • The vehicle is transported by a ferry, trailer or train.

        • The vehicle is parked in multi-story parking facilities.

        • The vehicle is washed by a conveyor type car washing machine.

        • A tire blew out.

        • The vehicle is jacked up for a tire or wheel change.

        • An earthquake occurs or road subsides.

        • Goods such as skis or snowboards are loaded or unloaded.

    7. THEFT WARNING SIREN (w/ Theft Warning Siren)


      1. The theft warning siren has an internal battery. If power to the theft warning siren is interrupted or any of the communication lines are open, the theft warning siren detects it and sounds the alarm using the internal battery.

      2. The theft warning siren has the following alarm controls: normal alarm control and open circuit alarm control. Under normal alarm control, the alarm sounds based on instructions from the certification ECU whereas under open circuit alarm control, the theft warning siren judges current security conditions and sounds the alarm by itself.


        1. Normal alarm control

          The theft warning siren sounds when the theft deterrent system is in the alarm sounding state and does not sound when the system is not in the alarm sounding state.

          Tech Tips

          If communication interruption between the theft warning siren and certification ECU continues for 70 seconds or more while the theft deterrent system is in the alarm sounding state, the theft warning siren stops sounding.

        2. Open circuit alarm control

          The theft warning siren changes between the disarmed state and armed state in accordance with the theft deterrent system change between the disarmed state and armed state. If +B, GND or the communication line is open while the theft warning siren is in the armed state, the theft warning siren sounds.

          A000X6DE01

          During the open circuit alarm sounding state, the theft warning siren sounds intermittently for approximately 27.5 seconds and then stops for 5 seconds and this pattern repeats a maximum of 9 times.

          The intermittent sound will stop when either condition is met:

          1. The theft warning siren changes to the disarmed state.

          2. The open circuit is returned to normal.

          A000VO0E01