Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: System Description

SYSTEM DESCRIPTION

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*1
    • Key linked lock/unlock operation
    • Opening and closing the doors*2
      • *1: Using the remote door lock and unlock is also considered to be a wireless lock/unlock operation. (for Toyota Entune Remote Connect Compatible Type)
      • *2: 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, the engine hood or luggage compartment door 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 horns 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 switch in the roof console box assembly are 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.

(a) Disarmed state:

  • The alarm function is not operating.
  • The theft deterrent system is not operating.

(b) Arming preparation state:

  • The time until the system goes into the armed state.
  • The theft deterrent system is not operating.

(c) Armed state:

  • The theft deterrent system is operating.

(d) Alarm sounding state:

  • The alarm function is operating.

Alarm time:

Approximately 57 seconds

Alarm Methods

Alarm Method

  • Exterior Lights
    • Low Beams
    • Taillights

Blinking

Turn Signal Lights

Blinking

Interior Lights

Illuminating

Vehicle Horns

Sounding

(Approximately 0.4-second cycles)

Security Horn Assembly

Sounding

(Approximately 0.4-second cycles)

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).

Certification ECU (Smart key ECU assembly)

  • Receives wireless door lock/unlock signal.
  • Receives entry door lock/unlock signal.

Luggage compartment door lock assembly

Detects luggage compartment door status (open or closed).

ACTIVE ARMING MODE

(a) Active arming mode:

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 this section refers to the driver door, front passenger door, rear door LH and rear door RH.
  • Using the remote door lock and unlock is also considered to be a wireless lock/unlock operation.*
    • *: for Toyota Entune Remote Connect Compatible Type

Condition

Item

Condition [1]

In disarmed state 1, when the power switch is turned off, the system state is changed if the following condition is met:

  • With all doors, the luggage compartment door 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 power switch is off, the engine hood and the luggage compartment door are 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 power switch is turned on (ACC) or on (IG). (Not using the remote start.*)
  • The auxiliary battery is reconnected.

Condition [4]

  • The engine hood is opened when it was closed.
  • The luggage compartment door is opened when it was closed.
  • The auxiliary battery is reconnected while the engine hood or the luggage compartment door 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 (IG) without pressing the power switch. (Not using the remote start.*)

Condition [5]

  • The power switch is turned on (READY).
  • All doors are unlocked by wireless operation, the smart key system or key linked power door lock operation.
  • The power switch is turned on (ACC) or on (IG) 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 luggage compartment door is opened by wireless operation or the smart key system.

Condition [8]

  • The luggage compartment door is closed when the engine hood is closed.
  • The engine hood is closed when the luggage compartment door is closed.

Condition [9]

  • Any door is unlocked when all doors are locked.
  • Any door is opened.
  • The power switch is pushed.
  • The power switch is turned on (ACC) or on (IG). (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 [10]

In disarmed state 1, when the power switch is turned off, the system state is changed if the following condition is met:

  • With all doors closed and the engine hood and the luggage compartment door open, all doors are locked by wireless operation, the smart key system or key linked power door lock operation.

In disarmed state 1, when the power switch is off, the engine hood and the luggage compartment door are 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 [11]

  • The engine hood is opened.
  • The luggage compartment door is opened.
  • The luggage compartment door is opened by wireless operation or the smart key system.
  • *: for Toyota Entune Remote Connect Compatible Type

FORCED DOOR LOCK CONTROL

(a) 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.

ALARM MEMORY FUNCTION

(a) 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.

PANIC ALARM CONTROL

(a) 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 power 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 power switch is turned on (IG).
  • The panic switch is pressed again.
  • Any of the switches on the key (lock/unlock/luggage compartment door open) 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.

SECURITY INDICATOR LIGHT OUTPUT

(a) 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 system unset)
  • Blinking (Immobiliser system 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 system is set, the security indicator light blinks during both the disarmed state and the armed state due to output signals from the immobiliser system.

    Security Horn Circuit

    System Diagram

    See More:

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