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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Theft Deterrent System - Diagnostics & Circuit Tests >> Theft Deterrent System >> System Description [12/2019 - 11/2023] >> System Description [12/2019 - 11/2023]

System Description [12/2019 - 11/2023]

  1. OUTLINE OF THEFT DETERRENT SYSTEM 
    • The theft deterrent system can be set/canceled by locking/unlocking the doors using any of the following operations:
      • Entry lock/unlock operation
      • Wireless lock/unlock operation
      • Key linked lock/unlock operation
      • Opening and closing the doors*
        1. *: Only when setting the theft deterrent system.
    • The alarm function will be activated when someone attempts to forcibly unlock any of the doors or open any of the doors or the engine hood while the system is in the armed state.
    • In the alarm sounding state, the system illuminates the interior lights and blinks the turn signal lights and the exterior lights. At the same time, the system sounds the vehicle horn and security horn assembly to deter break-in and theft as well as to warn people around the vehicle.

      HINT: 

      The interior lights are illuminated if the interior light door switches in the map light assembly is on.

    • The theft deterrent system has an active arming mode. There are 4 states in this mode; 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

      Approximately 57 seconds

      ALARM METHODS

      Alarm Method
      1. Exterior Lights
        • Low Beams
        • Taillights
      		 Blinking
      Turn Signal Lights Blinking
      Interior Lights Illuminating
      Vehicle Horn Sounding
      (Approximately 0.4-second cycles)
      Security Horn Assembly Sounding
      (Approximately 0.4-second cycles)
  2. FUNCTION OF MAIN COMPONENTS 
    Component Function
    Security indicator light Informs driver of theft deterrent system status.
    Security horn assembly Sounds when attempted break-in or theft is detected.
    Low beams Blink when attempted break-in or theft is detected.
    Taillights
    • Blink when attempted break-in or theft is detected.
    • Come on when theft deterrent system has entered alarm sounding state.
    Turn signal lights Blink when attempted break-in or theft is detected.
    Interior lights Comes on when attempted break-in or theft is detected.
    Vehicle horns Sound when attempted break-in or theft is detected.
    • Front door courtesy light switch assembly (for LH/RH)
    • Rear door courtesy light switch assembly (for LH/RH)
    		 Detects door status (open or closed).
    Door unlock detection switch Detects door status (locked or unlocked).
    Engine hood courtesy switch (Hood lock assembly) Detects engine hood status (open or closed).
    Back door lock with courtesy light switch assembly Detects back door status (open or closed).
    Certification ECU (Smart key ECU assembly)
    • Receives wireless door lock/unlock signal.
    • Receives entry door lock/unlock signal.
  3. ACTIVE ARMING MODE 
    1. Active arming mode (for HV Model):

      This system operates as described in the diagram below when one of the items for each condition is met.

      HINT: 

      The term "all doors" used in appropriate service information refers to the driver door, front passenger door, rear door LH, rear door RH and back door.

      GTY650640Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Condition Item
      Condition [1] In disarmed state 1, when the ignition switch is turned off or the remote start is operating*, the system state is changed if the following condition is met:
      • With all doors and the engine hood closed, all doors are locked by wireless operation, the smart key system or key linked power door lock operation.

      In disarmed state 1, when the ignition switch is off, the engine hood is closed and all doors are locked, the system state is changed if the following condition is met:

      • All doors are closed when any door is open.
      Condition [2]
      • Approximately 30 seconds elapse.
      Condition [3]
      • All doors are unlocked by wireless operation, the smart key system or key linked power door lock operation.
      • Any door is unlocked.
      • Any door is opened.
      • The power switch is pushed.
      • The ignition switch is turned to ACC or ON. (Not using the remote start.*)
      • The auxiliary battery is reconnected.
      Condition [4]
      • The engine hood is opened when it was closed.
      • The auxiliary battery is reconnected while the engine hood is open or any door is unlocked.
      • Any door is opened when all doors are closed.
      • Any door is unlocked when all doors are locked.
      • When 5 seconds or more have elapsed since the power switch is pressed, the power source mode is changed from off to ON without pressing the power switch. (Not using the remote start.*)
      Condition [5]
      • The ignition switch is turned on (READY).
      • All doors are unlocked by wireless operation, the smart key system or key linked power door lock operation.
      • The ignition switch is turned to ACC or ON within 5 seconds after the power switch is pushed. (Not using the remote start.*)
      Condition [6]
      • After approximately 57 seconds, the alarm stops and the system returns to the armed state.
      Condition [7]
      • The back door is closed when the engine hood is closed.
      • The engine hood is closed when the back door is closed.
      Condition [8]
      • Any door is unlocked when all doors are locked.
      • Any door is opened.
      • The power back door stops or operates in the reverse direction during a closing operation, or any of the doors are opened during a power back door closing operation.
      • The power switch is pushed.
      • The ignition switch is turned to ACC or ON. (Not using the remote start.*)
      • The auxiliary battery is reconnected.
      • All doors are unlocked by wireless operation, the smart key system or key linked power door lock operation.
      Condition [9] In disarmed state 1, when the ignition switch is turned off, the system state is changed if the following condition is met:
      • With all doors closed and the engine hood is open, all doors are locked by wireless operation, the smart key system or key linked power door lock operation.
      • During a power back door close operation with all other doors closed, the doors are locked (power back door reservation lock) by wireless operation.

      In disarmed state 1, when the ignition switch is off, the engine hood is open and all doors are locked, the system state is changed if the following condition is met:

      • All doors are closed when any door is open.
      Condition [10] The engine hood is opened.
      1. *: w/ Remote Engine Start Function
    2. Active arming mode (for Gasoline Model):

      This system operates as described in the diagram below when one of the items for each condition is met.

      HINT: 

      The term "all doors" used in appropriate service information refers to the driver door, front passenger door, rear door LH, rear door RH and back door.

      GTY650640Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Condition Item
      Condition [1] In disarmed state 1, when the ignition switch is turned off or the remote start is operating*1, the system state is changed if the following condition is met:
      • With all doors and the engine hood closed, all doors are locked by wireless operation, the smart key system or key linked power door lock operation.

      In disarmed state 1, when the ignition switch is off, the engine hood is closed and all doors are locked, the system state is changed if the following condition is met:

      • All doors are closed when any door is open.
      Condition [2]
      • Approximately 30 seconds elapse.
      Condition [3]
      • All doors are unlocked by wireless operation, the smart key system or key linked power door lock operation.
      • Any door is unlocked.
      • Any door is opened.
      • The engine switch is pushed.
      • The ignition switch is turned to ACC or ON. (Not using the remote start.*1)
      • The auxiliary battery is reconnected.
      Condition [4]
      • The engine hood is opened when it was closed.
      • The auxiliary battery is reconnected while the engine hood is open or any door is unlocked.
      • Any door is opened when all doors are closed.
      • Any door is unlocked when all doors are locked.
      • When 5 seconds or more have elapsed since the engine switch is pressed, the power source mode is changed from off to ON without pressing the engine switch. (Not using the remote start.*1)
      Condition [5]
      • The ignition switch is turned to ON and the engine is running at 550 rpm for 2 seconds or more.
      • All doors are unlocked by wireless operation, the smart key system or key linked power door lock operation.
      • The ignition switch is turned to ACC or ON within 5 seconds after the engine switch is pushed. (Not using the remote start.*1)
      Condition [6]
      • After approximately 57 seconds, the alarm stops and the system returns to the armed state.
      Condition [7]
      • The back door is closed when the engine hood is closed.*2
      • The engine hood is closed when the back door is closed.*2
      • The engine hood is closed when it was open.*3
      Condition [8]
      • Any door is unlocked when all doors are locked.
      • Any door is opened.
      • The power back door stops or operates in the reverse direction during a closing operation, or any of the doors are opened during a power back door closing operation.*2
      • The engine switch is pushed.
      • The ignition switch is turned to ACC or ON. (Not using the remote start.*1)
      • The auxiliary battery is reconnected.
      • All doors are unlocked by wireless operation, the smart key system or key linked power door lock operation.
      Condition [9] In disarmed state 1, when the ignition switch is turned off, the system state is changed if the following condition is met:
      • With all doors closed and the engine hood is open, all doors are locked by wireless operation, the smart key system or key linked power door lock operation.
      • During a power back door close operation with all other doors closed, the doors are locked (power back door reservation lock) by wireless operation.

      In disarmed state 1, when the ignition switch is off, the engine hood is open and all doors are locked, the system state is changed if the following condition is met:

      • All doors are closed when any door is open.
      Condition [10] The engine hood is opened.
      1. *1: w/ Remote Engine Start Function
      2. *2: w/ Power Back Door System
      3. *3: w/o Power Back Door System
  4. FORCED DOOR LOCK CONTROL 
    1. The forced door lock control prevents the vehicle from being tampered with. Immediately after a door is unlocked (armed state), all doors are forced to lock by a forced door lock signal.
      1. If the following conditions are met, the forced door lock control is operated.
        • The theft deterrent system is in the armed state.
        • Any door is unlocked.
  5. ALARM MEMORY FUNCTION 
    1. If the alarm is set off (tampering is detected) while the theft deterrent system is in the armed state, it will be stored by the alarm memory function. Whenever the theft deterrent system is canceled, the alarm memory function causes the taillights to light up for 2 seconds in order to inform the user that the alarm has been set off.
      1. Condition that cause the taillights to light up for 2 seconds:

        The theft deterrent system has entered the alarm sounding state (tampering has been detected) at least once.

        HINT: 

        Active arming mode: See Active Arming Mode.

  6. PANIC ALARM CONTROL 
    1. Panic alarm control makes it possible to voluntarily set off the panic alarm by pressing the panic switch on the key.
      1. Conditions that cause panic alarm control to set off the panic alarm:

        The panic switch on the key is pressed under the following conditions:

        • The ignition switch is off.
        • The theft deterrent system is not in the alarm sounding state.
      2. Conditions that cause the panic alarm control to shut off the alarm:

        Any of the following conditions is met during panic alarm control operation:

        • The ignition switch is turned to ON.
        • The panic switch is pressed again.
        • Any of the switches on the key (lock/unlock) is pressed.
        • The panic alarm ends (approximately 57 seconds have elapsed).
        • The theft deterrent system switches to the alarm sounding state. Under this condition, the theft deterrent system controls 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.
  7. SECURITY INDICATOR LIGHT OUTPUT 
    1. According to the state of the theft deterrent system, the main body ECU (multiplex network body ECU) outputs a signal to turn the security indicator light on. However, some of the actual lighting conditions of the security indicator light are different from the output signals of the main body ECU (multiplex network body ECU).
      OUTPUT

      State of Theft Deterrent System Security Indicator Light
      Output Signal from Main Body ECU (Multiplex Network Body ECU) Actual Lighting Condition
      Disarmed state (1), (2) Off
      • Off (Immobiliser function unset)
      • Blinking (Immobiliser function set)
      Arming preparation state On On
      Armed state Off Blinking
      Alarm sounding state On On
      BLINKING CYCLE

      Time Security Indicator Light
      0.125 sec. On
      1.875 sec. Off

      HINT: 

      When the immobiliser function is set, the security indicator light blinks during both the disarmed state and the armed state due to output signals from the immobiliser function.

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