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Home › Lexus › 2008 › IS F › Repair and Diagnosis › Body & Frame › Door Locks › Theft Deterrent / Keyless Entry › Theft Deterrent System › System Description

System Description

  1. OUTLINE OF THEFT DETERRENT SYSTEM 
    • When the theft deterrent system detects that the vehicle is being tampered with, the system sets off the alarm, causing the horns to sound and the lights to light up or blink in order to alert people around the vehicle to the theft
    • The theft deterrent system has 2 modes, one is active arming mode (see  3Active Arming Mode) and the other is passive arming mode (see  4Passive Arming Mode). The passive arming mode can be switched ON/OFF using the specified method
    • Each mode has 4 states, a disarmed state, an arming preparation state, an armed state and an alarm sounding state
    1. Disarmed state
      • The alarm function is not operating
      • The theft deterrent system is not operating.
    2. Arming preparation state
      • The time until the system goes into the armed 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

      Alarm time: 

      Approx. 60 sec. 

      Refer to table below for alarm method and time 

      BLINKING PATTERN CHART

      Alarm Method Headlight Blinking
      Taillight Blinking
      Hazard Warning Light Blinking
      Interior Light Illuminating
      Vehicle Horn Sounding
      (approx 0 4 second cycles)
      Security Horn Sounding
      (approx 0 4 second cycles)
      Alarm Time Approx 60 sec

      HINT:

      If any of the doors are unlocked when the key is not in the actuation area during the armed state, a forced door lock signal will be output (see  5 Forced Door Lock Control).

  2. FUNCTION OF MAIN COMPONENT 
    COMPONENT FUNCTION CHART

    Component Function
    Security indicator Informs driver of theft deterrent system status
    Security horn Sounds when attempted brake-in or theft is detected
    Headlights Blink when attempted break-in or theft is detected
    Taillights Blink when attempted break-in or theft is detected
    Hazard warning lights Blink when attempted break-in or theft is detected
    Interior light Lights up 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 status (open or closed)
    Door lock position switch Detects door status (locked or unlocked)
    Engine hood courtesy switch Detects engine hood status (open or closed)
    Luggage compartment door courtesy switch Detects luggage compartment door status (open or closed)
    Power source control ECU Detects engine switch states (off or on (IG))
  3. ACTIVE ARMING MODE 

    HINT:

    • Active arming mode starts the alarm control immediately after the doors are locked.
    • This system activates as described in the diagram below when one of items for each condition is met.
    1. Active arming mode
      Fig 1: Theft Deterrent System Flow Chart
      G05754528Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      ITEM REFERENCE CHART

      Condition Item
      Condition (1) In the disarmed state, when the key is not in the actuation area, the system state is switched if one of the following conditions is met
      1. With all doors, engine hood and luggage compartment door closed, all doors are locked by key operation
      2. With all doors, engine hood and luggage compartment door closed, all doors are locked by using the transmitter LOCK switch or the smart access system with push-button start
      Condition (2)
      1. Allow approx 30 sec to elapse
      Condition (3)
      1. All doors or driver side door is by wireless operation or the smart access system with push-button start
      2. All doors or driver side door is by key operation
      3. Any of the door is unlocked
      4. Any of the door is opened
      5. Reconnect battery
      6. Turn the engine switch from off to on (IG)
      Condition (4)
      1. Engine hood is opened
      2. Luggage compartment door is opened
      3. Reconnect battery
      4. Any of the door is opened
      5. Any of the door is unlocked when all doors are locked
      6. Turn the engine switch on (IG) when the key is not in the actuation area (A remote control starter is not in use at this time)
      Condition (5)
      1. All doors are unlocked by wireless operation or the smart access system with push-button start
      2. All doors are unlocked by key operation
      3. Turn the engine switch on (ACC or IG) within 5 seconds after turning it off
      Condition (6)
      1. After approx 60 sec, alarm stops and system returns to armed state
      Condition (7)
      1. All doors are unlocked by wireless operation
      2. Luggage compartment door is opened by key operation
      Condition (8)
      1. Engine hood is closed
      2. Luggage compartment door is closed
      Condition (9)
      1. Any of the door is unlocked when all doors are locked
      2. Any of the door is opened
      3. Turn the engine switch on (ACC or IG)
      4. Reconnect battery
      5. All doors are unlocked by wireless operation
      6. All doors are unlocked by key operation
      Condition (10)
      1. With all doors, engine hood and luggage compartment door closed, all doors are locked by key operation
      2. With all doors, engine hood and luggage compartment door closed, all doors are locked by wireless operation or the smart access system with push-button start
      Condition (11)
      1. Engine hood is opened
      2. Luggage compartment door is opened by wireless operation
      3. Luggage compartment door is unlocked by key operation
  4. PASSIVE ARMING MODE 

    HINT

    • Passive arming mode starts the alarm control after the key is removed from the actuation area and doors are closed
    • Passive arming mode can be switched ON/OFF by the Techstream
    • The alarm is initially set (when shipped from factory) to active arming mode (not passive arming mode)
    • During passive arming mode, the theft deterrent system goes into the armed state even if the doors are not locked
    • Detecting that the doors are unlocked does not set off the alarm during passive arming mode
    • A forced door lock signal is not output during passive arming mode (see  5 Forced Door Lock Control)
    • Although the theft deterrent system detects that the doors are opened during passive arming mode, the alarm will not go off immediately because an entry delay time is set
    • If any of the following conditions is met during passive arming mode, the theft deterrent system will switch to active arming mode
      • With all doors, engine hood and luggage compartment door closed, lock all doors by key operation
      • With all doors, engine hood and luggage compartment door closed, lock all doors by using the transmitter LOCK switch or the smart access system with push-button start.
    • This system activates as described in the diagram below when one of the items for each condition is met
    1. Passive Arming Mode
      Fig 2: Theft Deterrent System Flow Chart
      G05754529Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      ITEM REFERENCE CHART

      Condition Item
      Condition (1)
      1. With engine switch off, any of the door is opened
      Condition (2)
      1. All doors, engine hood and luggage compartment door are closed
      Condition (3)
      1. Any of the door is unlocked by wireless operation
      2. Any of the door is unlocked by key operation
      3. Reconnect battery
      4. Turn the engine switch from off to on (IG)
      Condition (4)
      1. Allow approx 30 sec to elapse
      Condition (5)
      1. Any of the door, engine hood or luggage compartment door is opened
      2. Luggage compartment door is opened by wireless operation
      3. Luggage compartment door is opened by key operation
      Condition (6)
      1. Any of the doors is opened and entry delay time*1 elapses
      2. Engine hood is opened
      3. Luggage compartment door is opened
      4. Reconnect battery
      5. Turn the engine switch on (IG) when the key is not in the actuation area (A remote control starter is not in use at this time)
      Condition (7)
      1. Any of the door is unlocked by wireless operation
      2. Any of the door is unlocked by key operation
      3. Engine switch is turned on (ACC or IG) within 5 seconds after turning it off
      4. Turn the engine switch on (IG) and run the engine for more than 2 seconds
      Condition (8)
      1. Luggage compartment door is opened by wireless operation
      2. Luggage compartment door is opened by key operation
      Condition (9)
      1. After approx 60 sec, alarm stops and system returns to armed state
      HINT:
      *1. If any door is opened during passive arming mode, the entry delay time starts. If the switch condition (armed state → disarmed state 1 or 2 is met during the entry delay time, the theft deterrent system will return to disarmed state 1 or 2 However, if the switch condition for disarmed state 1 or 2 is not met, the theft deterrent system will recognize it as a theft and set off the alarm Entry delay time of 0,14 or 30 sec can be selected by the customizing function
  5. FORCED DOOR LOCK CONTROL 
    1. The forced door lock control prevents the vehicle from being tampered with Immediately after a door is unlocked (alarm starts), the door is forced to lock by a forced door lock signal
      1. Conditions that force the doors to lock. When the key is not in the actuation area and both of the following conditions are met
        • The theft deterrent system is in the alarm sounding state of active arming mode
        • Any of the door is unlocked
  6. ALARM MEMORY FUNCTION 
    1. If the alarm is set off (tampering is detected) while the theft deterrent system is armed, it will be recorded by the alarm memory function. Whenever the theft deterrent system is cancelled, the alarm memory function causes the taillights to light up for 2 seconds in order to inform you that the alarm has been set off.
      1. Conditions of the alarm memory function that cause the taillights to light up for 2 seconds:
        • When the theft deterrent system has entered into the alarm sounding state (tempering has been detected) even once.
        • When switched to disarmed state 1 from the armed state during passive arming mode.

        HINT

        Active arming mode see  3. Passive Arming Mode see  4

  7. PANIC ALARM CONTROL 
    1. The panic alarm control makes it possible to voluntarily set off the panic alarm by pressing the PANIC switch on the wireless transmitter
      1. When the PANIC switch on the wireless transmitter is pressed, the panic alarm control sets off the panic alarm if any of the following conditions is met:
        • The engine switch is off
        • The theft deterrent system is not in the alarm sounding state (This condition is common both to active arming mode and to passive arming mode.)
      2. Conditions that cause the panic alarm control to shut off the alarm: The panic alarm control shuts off the panic alarm when any of the following conditions is met during panic alarm operation
        • The engine switch is turned on (IG).
        • The panic alarm switch is turned on again.
        • Either of the switches on the wireless transmitter (LOCK/UNLOCK/TRUNK) is pressed
        • The panic alarm ends (approx 60 sec have passed)
        • The theft deterrent system switches to the alarm sounding state Under this condition, the theft deterrent system is controlling the alarm rather than the panic alarm control In order to cancel this alarm, refer to the theft deterrent system alarm sounding state cancellation procedure (This condition is common both to active arming mode and to passive arming mode)

        HINT:

        Active arming mode see  3. Passive arming mode see  4.

  8. SECURITY INDICATOR OUTPUT 
    1. The main body ECU RH (cowl side junction block RH) outputs a signal to light up the security indicator, according to the state of the theft deterrent system

      Output 

      ITEM REFERENCE CHART

      State of Theft Deterrent System* Security Indicator
      Output Signals from Main Body ECU RH Actual Lighting Condition
      Disarmed state 1, 2 OFF (Immobilizer system upset)
      BLINKING (Immobilizer system set)      		 OFF (Immobilizer system upset)
      BLINKING (Immobilizer system set)
      Arming preparation state ON ON
      Armed state BLINKING BLINKING
      Alarm sounding state ON ON

      Blinking Cycle 

      BLINKING CYCLE REFERENCE

      Time Security Indicator
      0 2 sec ON
      1 8 sec OFF

      HINT

      • *. The above condition is common both to active arming mode and to passive arming mode
      • When the immobilizer system is set, the security indicator blinks during both the disarmed state and the armed state, due to the output signals from the immobilizer system
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