Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: System Description

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Access System With Push-button Start (for Entry Function) / System Description

SYSTEM DESCRIPTION

MULTI CHANNEL FUNCTION

(a) The electrical key transmitter sub-assembly and door control receiver can operate on two different RF channels. When an electrical key transmitter sub-assembly is brought within an exterior detection area, key verification begins. If key verification fails due to wave interference, the channel will be switched and key verification will be performed again.

The multi channel system begins verification using the channel on which the last verification was successfully performed. When verification fails, the system switches to the other channel.

SMART ACCESS SYSTEM WITH PUSH-BUTTON START SPECIFICATIONS

(a) Some customers may inquire about the frequency used by the smart access system with push-button start on various models. This repair manual contains the applicable specifications of the smart access system with push-button start.

*a

Transmitter Detection Area

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Specifications for Smart Access System with Push-button Start Antenna LF Output Power
 

Specification

Frequency

Output Power/Electric Field Intensity

Modulation Method

Mounting Point in Vehicle

Inside Passenger Compartment

134.2 kHz

94.4 dBuV/m at 3 m

AM

Inside vehicle

Outside Vehicle

134.2 kHz

95 dBuV/m at 3 m

AM

Inside door handle

95 dBuV/m at 3 m

AM

Inside rear bumper
Specifications for Smart Access System with Push-button Start Antenna LF Transmission Timing
 

Transmission Timing

Vehicle Remains Parked

Entering or Exiting the Vehicle

Vehicle is being Driven

Inside Passenger Compartment

Does not transmit
  • Operating door locks
  • Operating engine switch / depressing brake pedal
  • Opening or closing doors
  • With engine switch on (IG) or engine switch on (ACC), and shift lever in P, closing any door when electrical key transmitter sub-assembly cannot be detected inside vehicle (continues for 3 seconds until electrical key transmitter sub-assembly is detected or engine switch is turned off)
  • Engine switch is off after driving for more than 20 minutes
  • With shift lever not in P, closing any door when electrical key transmitter sub-assembly cannot be detected inside vehicle (continues for 3 seconds until electrical key transmitter sub-assembly is detected)

When electrical key transmitter sub-assembly is not detected inside cabin while vehicle is being driven (transmits for 4 seconds)

Outside Vehicle

(1) When door is locked, transmits at 250 ms intervals (stops when door is unlocked)

(2) Does not transmit

(1) Touch the lock sensor

(2) Pressing back door opener switch assembly

(3) Touching unlock sensor in power saving mode

Does not transmit

BASIC PRECAUTIONS

(a) DTCs and Data Lists of ECUs related to the smart access system with push-button start can be checked using the Techstream.

(b) Check for DTCs using the following procedure. If any DTCs are output, diagnose those DTCs first.

(1) Connect the Techstream to the DLC3.

(2) Turn the engine switch on (IG).

(3) Enter the following menus: Body Electrical / Smart Access, Power Source Control or Starting Control / Trouble Codes.

(c) When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.

(d) If the smart access system with push-button start has been canceled by a customize setting, enable the smart access system with push-button start.

Click here

DIAGRAM OF SMART ACCESS SYSTEM WITH PUSH-BUTTON START

SYSTEM DESCRIPTION

The following pattern will be used: "Operation" indicates user operation using the smart access system with push-button start. "Expected operation of the vehicle" indicates how a known good vehicle will react in accordance with each operation. "Suspected Area/Diagnosis" indicates suspected malfunctioning areas and tips for performing diagnosis if the vehicle did not react as expected.

(a) Example: Operation No.

Operation

-

Expected operation of the vehicle

-

Waveform or Output Value

-

Suspected Area

Diagnosis

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-

DIAGNOSIS IN ACCORDANCE WITH USER OPERATION

(a) Operation 1

Operation

Turn the engine switch off and lock all the doors, then take the electrical key transmitter sub-assembly approximately 3 m (9.84 ft.) or more away from the vehicle.

HINT:

The detection area of each electrical key antenna (outside) is formed by emitting a periodic LF band request signal every 0.25 seconds. The detection area formed by each front door outside handle assembly (electrical key antenna) and rear door outside handle assembly (electrical key antenna) has a detection range of approximately 0.7 m (2.30 ft.).

Waveform or Output Value

Pulse generation (R1-17 (CLG1) - J41-18 (E)*)
  • *: Click here

(b) Operation 2

Operation

Bring the electrical key transmitter sub-assembly within 0.7 m (2.30 ft.) of the driver door.

HINT:

The system will enter in unlock standby mode when the electrical key transmitter sub-assembly is brought into the detection area and the key ID code sent by the electrical key transmitter sub-assembly matches the key ID code stored by the certification ECU (smart key ECU assembly). The door unlocks if the unlock sensor is touched by hand with the system in unlock standby mode.

Signal transmission: Certification ECU (smart key ECU assembly) → Door outside handle assembly (electrical key antenna) → Electrical key transmitter sub-assembly → Door control receiver → Certification ECU (smart key ECU assembly) → Main body ECU (multiplex network body ECU)

Expected operation of the vehicle

The LED of the electrical key transmitter sub-assembly starts blinking. If it does not, check the suspected areas in the following table.

Waveform or Output Value
  • Pulse generation (R1-17 (CLG1) - J41-18 (E)*)
  • Pulse generation (R1-18 (RCO) - J41-18 (E)*)
  • Pulse generation (R1-19 (RDAM) - J41-18 (E)*)
  • Pulse generation (R1-20 (CSEL) - J41-18 (E)*)
  • *: Click here

Suspected Area

Diagnosis

Electrical key transmitter sub-assembly
  • The key ID code sent by the electrical key transmitter sub-assembly does not match the key ID code stored in the certification ECU (smart key ECU assembly). Use another electrical key transmitter sub-assembly to check the operation.
  • If the LED of the electrical key transmitter sub-assembly does not blink when it is brought within 0.7 m (2.30 ft.) of the front door outside handle assembly (for driver door), perform the following procedure.

    Press the lock and unlock switches of the electrical key transmitter sub-assembly to check the operation. If the doors can be locked and unlocked, that means the detection area has not been formed. Parts other than the electrical key transmitter sub-assemblies and door control receiver may be malfunctioning.

  • If the electrical key transmitter sub-assembly is malfunctioning, the engine cannot be started and the engine switch cannot be turned on (ACC) or on (IG). Under normal conditions, the entry warning light is displayed on the multi-information display in the combination meter assembly when the engine switch is pressed with the electrical key transmitter sub-assembly in the driver seat area, the shift lever in P and the brake pedal released. If the driver door cannot be opened, use the mechanical key installed in the electrical key transmitter sub-assembly to open the door.

HINT:

  • Before replacing the electrical key transmitter sub-assembly, check if the transmitter battery is depleted.
  • If the driver door cannot be opened, use the mechanical key installed in the electrical key transmitter sub-assembly to open the door.

Transmitter battery is depleted
  • Press and hold the lock switch of the electrical key transmitter sub-assembly for 5 seconds and check the number of times that the LED of the electrical key transmitter sub-assembly blinks. If the LED of the electrical key transmitter sub-assembly does not blink or blinks only once or twice, the transmitter battery may be depleted. If the LED of the electrical key transmitter sub-assembly does not blink at all, the electrical key transmitter sub-assembly may be malfunctioning.
  • If the transmitter battery voltage at the time the electrical key transmitter sub-assembly sends a signal drops to 2.2 V or less, "Yes" is displayed for "Key Low Battery" in the Data List.
  • If the transmitter battery voltage drops to 2.0 V or lower, operation cannot be assured.

    HINT:

    The output of the electrical key transmitter sub-assembly will decrease if it is in low temperatures.

  • When the transmitter battery is depleted, the engine cannot be started and the engine switch cannot be turned on (ACC) or on (IG). If the electrical key transmitter sub-assembly is held near the engine switch, the engine can be started.
  • Make sure that the transmitter battery type and installation direction are correct.

Wave Interference
  • If the problem occurs in certain locations or times of day, the possibility of wave interference is high.
  • When the electrical key transmitter sub-assembly is malfunctioning, the transmitter battery is depleted, an electrical key transmitter sub-assembly from another vehicle has been used or wave interference is suspected. "Yes" may be displayed for any of the following Data List items: "Unmatch Code or Form", "No Response", "ID Code Difference" or "Unmatched Vehicle-ID"

Certification ECU (smart key ECU assembly)

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Main body ECU (multiplex network body ECU)

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Front door outside handle assembly

Vehicle exterior detection area is not formed properly.

  • If the LED of the electrical key transmitter sub-assembly does not blink when it is brought within 0.7 m (2.30 ft.) of the front door outside handle assembly (for driver door), but blinks when it is brought within 0.7 m (2.30 ft.) of the front door outside handle assembly (for front passenger door), the front door outside handle assembly of the driver door may be malfunctioning.
  • Even if the vehicle exterior detection area is not formed properly, the engine switch can be turned on (ACC) and the engine can be started.
  • Formation of the vehicle exterior detection area can be confirmed by using the Techstream.

    Click here

  • Even if the vehicle exterior detection area is not formed properly, the doors can be unlocked by pressing the unlock switch of the electrical key transmitter sub-assembly.

Door Control Receiver
  • If the door control receiver is malfunctioning, it is not possible to unlock the front passenger door and rear door.
  • If the door control receiver is malfunctioning, it is not possible to unlock the doors by a wireless unlock operation.
  • If the door control receiver is malfunctioning, the engine cannot be started and the engine switch cannot be turned on (ACC) or on (IG) unless in an emergency.
  • Formation of the vehicle exterior detection area can be confirmed by using the Techstream.

    Click here

Battery is discharged

It may be possible to tell whether the battery is discharged by operating the horn.

Others
  • If the smart access system with push-button start function has been canceled through the customize function, the detection area cannot be formed, therefore the LED of the electrical key transmitter sub-assembly will not blink even if the electrical key transmitter sub-assembly is brought near a front door outside handle assembly or rear door outside handle assembly.
  • In the smart access system with push-button start, if the electrical key transmitter sub-assembly is constantly in the exterior detection area of one of the doors, the transmitter battery could be drained. For this reason, if this state continues for longer than 10 minutes, the smart access system with push-button start automatically deactivates the exterior detection area that the electrical key transmitter sub-assembly is in.
  • If the electrical key transmitter sub-assembly is in transmitter battery saving mode, even if it receives LF waves from the vehicle, it will not respond using RF waves, therefore the LED of the electrical key transmitter sub-assembly will not blink.
  • If the electrical key transmitter sub-assembly is left in the vehicle and the doors are locked using another electrical key transmitter sub-assembly, the LED of the electrical key transmitter sub-assembly will not blink even if it is brought near a front door outside handle assembly.

(c) Operation 3

Operation

Touch the unlock sensor of the front door outside handle assembly (for driver door) with the electrical key transmitter sub-assembly in the exterior detection area.

Expected operation of the vehicle

While the doors are unlocked, the answer-back is performed at the same time. If they do not, check the suspected areas in the following table.

Waveform or Output Value
  • Pulse generation (R1-17 (CLG1) - J41-18 (E)*)
  • Tester connection (instrument panel junction block assembly (ACT-) - body ground)*
  • *: Click here

Suspected Area

Diagnosis

The suspected parts below overlap with the parts covered in operation 2 for when the LED of the electrical key transmitter sub-assembly does not blink.

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Front door outside handle assembly (unlock sensor)
  • If the doors can be unlocked by touching the unlock sensor of the front door outside handle assembly (for front passenger door) door while carrying the electrical key transmitter sub-assembly, the unlock sensor of the front door outside handle assembly (for driver door) may be malfunctioning.
  • Under normal conditions, "ON" is displayed for the Data List item "D-Door Touch Sensor" when the unlock sensor is touched.

Door lock/unlock mechanism

If a door cannot be locked/unlocked by operating the door control switch on the door in the cabin, the door lock mechanism is malfunctioning.

(d) Operation 4

Operation

After getting into the vehicle while carrying the electrical key transmitter sub-assembly, close the door and press the engine switch once with the shift lever in P while not depressing the brake pedal.

Expected operation of the vehicle
  • The security indicator light turns off, and then the immobiliser function is canceled, allowing the vehicle to be driven.
  • The steering is unlocked.

If any of the preceding do not happen, check the suspected areas in the following table.

HINT:

When the engine switch is pressed, the indoor electrical key antennas form the key detection area inside the vehicle and detect the electrical key transmitter sub-assembly in the cabin. The electrical key transmitter sub-assembly sends a key ID code upon receiving a request signal and the LED of the electrical key transmitter sub-assembly illuminates for a short time. After pressing the engine switch, if the key ID code sent by the electrical key transmitter sub-assembly matches the key ID code stored by the certification ECU (smart key ECU assembly), the ACC relay turns on and entry warning light is displayed on the multi-information display in the combination meter assembly. After the power source mode has changed, and L code and S code verification has been completed, the steering will be unlocked and the immobiliser will be disabled. The Data List item "Immobiliser" will then change from "Set" to "Unset".

Signal transmission: Certification ECU (smart key ECU assembly) → Indoor electrical key antenna → Electrical key transmitter sub-assembly → Door control receiver → Certification ECU (smart key ECU assembly)

HINT:

The interior detection area is formed when any of the following conditions are met:

  • Any door is opened.
  • Any of the doors have been opened and closed (formed within approximately 30 seconds).
  • The brake pedal has been depressed (formed within approximately 30 seconds).
  • The engine switch is pressed.

Waveform or Output Value
  • Pulse generation (R1-19 (RDAM) - J41-18 (E)*)
  • Pulse generation (J41-8 (CLG5) - J41-18 (E)*)
  • Pulse generation (J41-17 (IG1D) - J41-18 (E)*)
  • *: Click here

Suspected Area

Diagnosis

Certification ECU (smart key ECU assembly)

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Wave Interference
  • If malfunctions occur at a specific location/time, wave interference may be the cause.
  • If wave interference is suspected in the cabin, disconnect the connectors of all electronic devices which are not standard equipment, or remove the electronic devices and check for electrical noise.

Indoor electrical key antenna assemblies that form the interior detection areas
  • If the interior detection area is not formed properly, the engine cannot be started and the engine switch cannot be turned on (ACC) or on (IG). In an emergency the electrical key transmitter sub-assembly can be held near the engine switch to the start engine.
  • Using the Techstream, enter key diagnostic mode to forcibly form the interior detection area. If the electrical key transmitter sub-assembly is brought near the area, short beeps will sound.

    Click here

Engine switch

Under normal conditions, after the engine switch is pressed, "ON" is displayed for the Data List items "Start Switch1" and "Start Switch2".

ID code box (immobiliser code ECU)

In order to unlock the steering, it is necessary for "OK" to be displayed for the Data List item "S Code Check". If "OK" is displayed for "S Code Check", the certification ECU (smart key ECU assembly) code and ID code box (immobiliser code ECU) code match.

Park/neutral position switch assembly

Under normal conditions "ON" is displayed for the Data List item, "Neutral SW/ Clutch SW" when the shift lever is in P.

Steering lock ECU (steering lock actuator or upper bracket assembly)
  • If "OK" is displayed for the Data List item "L Code Check" when the engine switch is turned on (ACC), power will be supplied to the steering motor for approximately 10 seconds. Then the ECU will send an unlock signal to the steering motor and the Data List item "Unlock Request Receive" will temporarily change from "NG" to "OK". After the steering is unlocked, the ECU receives the unlocked signal from the steering motor and the Data List item "Steering Unlock" changes from "Unset" to "Set".
  • In order for the steering to be unlocked, it is necessary that "OK" be displayed for the Data List item "L Code Check" (the ID code stored in the steering lock ECU (steering lock actuator or upper bracket assembly) matches that of the ID code box (immobiliser code ECU))

(e) Operation 5

Operation

Depress the brake pedal with the shift lever in P while carrying an electrical key transmitter sub-assembly.

Expected operation of the vehicle

The entry warning light appears on the multi-information display. If it does not, check the suspected areas in the following table.

Suspected Area

Diagnosis

Stop light switch assembly

If the brake pedal is depressed, "ON" is displayed for the Data List item "Stop Light Switch1".

Certification ECU (smart key ECU assembly)

Start function-Terminals of ECU

Click here

(f) Operation 6

Operation

After getting into the vehicle while carrying the electrical key transmitter sub-assembly, press the engine switch with the shift lever in P while depressing the brake pedal.

Expected operation of the vehicle

The engine starts. If it does not, check the suspected areas in the following table.

Suspected Area

Diagnosis

Steering lock system

Under normal conditions, the steering will be unlocked and "ON" will be displayed for the Data List item "Steering Unlock Switch".

Battery is discharged

Whether the battery is discharged or not can be checked easily by operating the horn.

(g) Operation 7

Operation

With the engine running, press the engine switch.

Expected operation of the vehicle

The engine stops, the entry warning light illuminates and then turns off and the security indicator light changes from off to blinking.

(h) Operation 8

Operation

Turn the engine switch off and open any of the doors.

Expected operation of the vehicle

The steering locks. If it does not, check the suspected areas in the following table.

Suspected Area

Diagnosis

Steering lock system

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Door courtesy light switch assembly

When the driver door is opened, "ON" is displayed for the Data List item "FL Door Courtesy SW".

(i) Operation 9

Operation

Touch the lock sensor of the front door outside handle assembly (for driver door) while carrying the electrical key transmitter sub-assembly.

Expected operation of the vehicle

The door lock and the answer-back is performed simultaneously.

BATTERY SAVING FUNCTION

(a) When the smart access system with push-button start is operating, the vehicle performs key detection operations every 0.25 seconds. Therefore, if the vehicle is left as is for a long period of time, the battery may become fully discharged. The following controls help reduce the rate at which the battery is discharged.

(1) If the smart access system with push-button start is not operated for 5 days or more, periodic signal transmission from the electrical key antennas stops. However, the doors can still be unlocked by touching the unlock sensor of a front door outside handle assembly or rear door outside handle assembly.

(2) If the smart access system with push-button start is not operated for 14 days or more, the lock and unlock sensors of the front door outside handle assembly (for front passenger door) and rear door outside handle assemblies will be disabled. Therefore, only the unlock sensor of the front door outside handle assembly (for driver door) can be used to unlock the doors.

(3) If 10 minutes or more elapse while the electrical key transmitter sub-assembly is in an exterior detection area, the front door outside handle assembly (electrical key antenna) or rear door outside handle assembly (electrical key antenna) detecting the electrical key transmitter sub-assembly will stop operating.

(b) To restore operation of the smart access system with push-button start, perform any of the following operations.

(1) While carrying the electrical key transmitter sub-assembly, touch the lock or unlock sensor of the front door outside handle assembly (for driver door) and perform a door lock or unlock operation.

(2) Lock or unlock the doors using the wireless function.

(3) Insert the mechanical key into the door key cylinder of the driver door and lock or unlock the doors.

WIRELESS BUZZER VOLUME ADJUSTMENT FUNCTION

(a) The volume of the wireless buzzer can be changed through the customize function.

HINT:

The volume of the following wireless buzzer operations cannot be adjusted.

  • Warning function buzzer operations
  • Customize function buzzer operations
  • Buzzer operations for key diagnostic mode using the Techstream
  • Key registration buzzer operations

WARNING FUNCTION

(a) Warning

(1) Situation: The engine is left running and the shift lever is in a position other than P when the driver gets out of the vehicle.

  • There are 2 patterns for this situation.
    • Pattern 1:

      When the engine is left running and the shift lever is in a position other than P, the driver opens the door and attempts to get out of the vehicle.

      In this situation, the following control is performed:

      Reason for warning

      Prevention of sudden acceleration, vehicle theft deterrent, prevention of vehicle roll-away

      Warning Start Condition

      (All conditions are met)
      • The engine switch is on (ACC) or on (IG).
      • The shift lever is in a position other than P.
      • The driver door is opened.
      • No vehicle speed is detected.

      Warning description
      • The buzzer in the combination meter assembly sounds continuously.
      • "Shift to P Before Exiting Vehicle" is displayed on the multi-information display in the combination meter assembly.

      Warning Stop Condition

      (One condition is met)
      • The engine switch is turned off.
      • The shift lever is in P.
      • The driver door is closed.
      • The vehicle speed is 5 km/h (3 mph) or more.
    • Pattern 2:

      Under the situation of pattern 1, the driver closes the door and attempts to leave the vehicle while holding the electrical key transmitter sub-assembly.

      In this situation, the following control is performed:

      Reason for warning

      Prevention of sudden acceleration, vehicle theft deterrent, prevention of vehicle roll-away

      Warning Start Condition

      (All conditions are met)
      • The engine switch is on (ACC) or on (IG).
      • The shift lever is in a position other than P.
      • The driver door is opened → closed.
      • The electrical key transmitter sub-assembly is not in the vehicle.
      • No vehicle speed is detected.

      Warning description
      • The buzzer in the combination meter assembly sounds continuously.
      • The wireless buzzer sounds continuously.
      • "Shift to P Before Exiting Vehicle"(A) and "Key Not Detected Check Key Location"(B) are displayed alternately on the multi-information display in the combination meter assembly.

      Warning Stop Condition

      (One condition is met)

      Warning stop conditions for (A)

      • The shift lever is in P.
      • The vehicle speed is 5 km/h (3 mph).

      Warning stop conditions for (B)

      • The engine switch is turned off.
      • The electrical key transmitter sub-assembly is returned to the vehicle.

(2) Situation: The key reminder sounds.

  • There are 3 patterns for this situation.
    • Pattern 1:

      When the shift lever is in P and the steering is unlocked, the driver opens the door and attempts to get out of the vehicle.

      In this situation, the following control is performed:

      Reason for warning

      Vehicle theft deterrent

      Warning Start Condition

      (Warning starts when condition 1 is met or condition 2 is met for 1 second)

      Condition 1

      • The engine switch is on (ACC).
      • The driver door is opened.

      Condition 2

      • The engine switch is off.
      • The steering is unlocked.
      • The driver door is opened.

      Warning description
      • The buzzer in the combination meter assembly sounds continuously at short and even intervals.

      Warning Stop Condition

      (One condition is met)
      • The engine switch is turned on (IG).
      • The driver door is closed.
      • The engine switch is turned off and the steering is locked.
    • Pattern 2:

      Under the situation of pattern 1, the driver closes the driver door and attempts to leave the vehicle while carrying the electrical key transmitter sub-assembly.

      In this situation, the following control is performed:

      Reason for warning

      Vehicle theft deterrent

      Warning Start Condition

      (All conditions are met)
      • The engine switch is on (ACC) or on (IG).
      • The shift lever is in P.
      • The driver door is opened → closed.
      • The electrical key transmitter sub-assembly is not in the vehicle.
      • No vehicle speed is detected.

      Warning description
      • The buzzer in the combination meter assembly sounds once.
      • The wireless buzzer sounds 8 times.
      • "Key Not Detected Check Key Location" is displayed on the multi-information display in the combination meter assembly.

      Warning Stop Condition

      (Either condition is met)
      • The engine switch is turned off.
      • The electrical key transmitter sub-assembly is returned to the vehicle.
    • Pattern 3:

      Under the situation of pattern 2, the driver touches the lock sensor on the door outside handle assembly.

      In this situation, the following control is performed:

      Reason for warning

      Vehicle theft deterrent

      Warning Start Condition

      (All conditions are met)
      • The engine switch is on (ACC) or on (IG).
      • The shift lever is in P.
      • The electrical key transmitter sub-assembly is not in the interior detection areas.
      • The electrical key transmitter sub-assembly is in the exterior detection areas.
      • The lock sensor is on.
      • No vehicle speed is detected.

      Warning description
      • The buzzer in the combination meter assembly sounds once.
      • The wireless buzzer sounds continuously.
      • "Turn Off Vehicle"(A) and "Key Not Detected Check Key Location"(B) are displayed alternately on the multi-information display in the combination meter assembly.

      Warning Stop Condition

      (One condition is met)
      • 5 seconds have elapsed after the warning started (only wireless buzzer stops).
      • Any door is opened (only wireless buzzer stops).
      • Any door is closed (only wireless buzzer stops).

      Warning stop conditions for (A)

      • 60 seconds have elapsed after the warning started.
      • The engine switch is off.
      • The shift lever is in a position other than P.
      • The vehicle speed is 5 km/h (3 mph).

      Warning stop conditions for (B)

      • The engine switch is off.
      • The electrical key transmitter sub-assembly is returned to the vehicle.

(3) Situation: A passenger gets out of the vehicle while carrying the electrical key transmitter sub-assembly.

  • When the engine switch is on (ACC) or on (IG), a passenger opens a door other than the driver door and attempts to get out of the vehicle while holding the electrical key transmitter sub-assembly.

    In this situation, the following control is performed:

    Reason for warning

    Preventing vehicle from becoming impossible to restart

    Warning Start Condition

    (All conditions are met)
    • The engine switch is on (ACC) or on (IG).
    • A door other than the driver door is opened → closed.
    • The electrical key transmitter sub-assembly is not in the vehicle.
    • No vehicle speed is detected.

    Warning description
    • The buzzer in the combination meter assembly sounds once.
    • The wireless buzzer sounds 8 times.
    • "Key Not Detected Check Key Location" is displayed on the multi-information display in the combination meter assembly.

    Warning Stop Condition

    (Either condition is met)
    • The engine switch is turned off.
    • The electrical key transmitter sub-assembly is returned to the vehicle.

(4) Situation: The electrical key transmitter sub-assembly is not in the interior or exterior detection areas.

  • The driver attempts to turn the engine switch on (IG) when the electrical key transmitter sub-assembly is not in the cabin, or attempts to change the power source mode by touching the electrical key transmitter sub-assembly to the engine switch.

    In this situation, the following control is performed:

    Reason for warning

    User confusion prevention

    Warning Start Condition

    (All conditions are met)
    • The immobiliser system is set.
    • The electrical key transmitter sub-assembly is not in the vehicle or the transmitter battery is depleted. (Interior verification failed or verification failed when the transmitter battery is depleted and the electrical key transmitter sub-assembly was touched to the engine switch.)
    • There is no history of unlocking the doors using the mechanical key and no history of verification failure when the engine switch is pressed.

    Warning description
    • The buzzer in the combination meter assembly sounds once.
    • "Key Not Detected Check Key Location" is displayed on the multi-information display in the combination meter assembly.

    Warning Stop Condition

    (One condition is met)
    • 15 seconds have elapsed after the warning started.
    • The electrical key transmitter sub-assembly is returned to the vehicle. (Interior verification succeed or verification succeed when the transmitter battery is depleted and the electrical key transmitter sub-assembly was touched to the engine switch.)
    • The driver door is opened using the door outside handle and 30 seconds have elapsed.

(5) Situation: The vehicle is driven without a registered electrical key transmitter sub-assembly.

  • In this situation, the following control is performed:

    Reason for warning

    Preventing vehicle from becoming impossible to restart

    Warning Start Condition

    (All conditions are met)
    • The engine switch is on (IG).
    • Warning for when a passenger gets out of the vehicle while carrying the electrical key transmitter sub-assembly is operating.
    • The vehicle speed is 5 km/h (3 mph) or more.
    • The electrical key transmitter sub-assembly is not in the vehicle.

    Warning description
    • The buzzer in the combination meter assembly sounds nine times.
    • "Key Not Detected Check Key Location" is displayed on the multi-information display in the combination meter assembly.

    Warning Stop Condition

    (Either condition is met)
    • The electrical key transmitter sub-assembly is returned to the vehicle.
    • The engine switch is turned off.

(6) Situation: The electrical key transmitter sub-assembly is left in the vehicle.

The lock sensor on a door outside handle assembly is touched to perform an entry lock operation with the electrical key transmitter sub-assembly left in the vehicle.

In this situation, the following control is performed:

Reason for warning

Vehicle theft deterrent

Warning Start Condition

(All conditions are met)
  • The engine switch is off.
  • All doors are closed.
  • The electrical key transmitter sub-assembly is in the vehicle.
  • The lock sensor on a door outside handle assembly is on (touched).
  • Any door is unlocked.
  • No vehicle speed is detected.

Warning description
  • The wireless buzzer sounds continuously.
  • "Key Left inside Vehicle" is displayed on the multi-information display in the combination meter assembly.

Warning Stop Condition

(One condition is met)
  • 5 seconds have elapsed after the wireless buzzer is activated (only wireless buzzer stops).
  • The engine switch is on (ACC) or on (IG).
  • The vehicle speed is 5 km/h (3 mph) or more.
  • Any door is opened (only wireless buzzer stops).
  • The doors are locked.
  • 60 seconds have elapsed after the warning started.

(7) Situation: Door is ajar.

  • The lock sensor on a door outside handle assembly is touched to perform an entry lock operation with a door open.

    In this situation, the following control is performed:

    Reason for warning

    Vehicle theft deterrent

    Warning Start Condition

    (All conditions are met)
    • The engine switch is off.
    • Any door other than the door that locked using the entry lock function is open*.
    • The lock sensor is on or lock switch is pressed on the electrical key transmitter sub-assembly.
    • The electrical key transmitter sub-assembly is in the exterior detection areas.

    Warning description
    • The wireless buzzer sounds continuously.*1

    Warning Stop Condition

    (One condition is met)
    • 5 seconds have elapsed after the wireless buzzer is activated.*1
    • The engine switch is on (ACC) or on (IG).
    • All doors are closed.*2
    • The doors are unlocked by a wireless door unlock operation.
    • The doors are unlocked by a the entry unlock operation.
    • Any of the doors are opened.
  • *1: Default setting is off.
  • *2: The back door is considered closed when the power back door is operating.

(8) Situation: The electrical key transmitter sub-assembly is locked inside the vehicle.

  • The electrical key transmitter sub-assembly is locked inside the vehicle.

    In this situation, the following control is performed:

    Reason for warning

    Vehicle theft deterrent

    Warning Start Condition

    (All conditions are met)
    • With a door open, the lock knob is locked and then the door is closed with the door handle being pulled or the power back door is closed and locked by the power back door entry reservation lock function.
    • The electrical key transmitter sub-assembly is in the vehicle.
    • No vehicle speed is detected.

    Warning description
    • The buzzer in the combination meter assembly sounds once.
    • The wireless buzzer sounds continuously.
    • "Key Left inside Vehicle" is displayed on the multi-information display in the combination meter assembly.

    Warning Stop Condition

    (One condition is met)
    • 5 seconds have elapsed after the wireless buzzer is activated (only wireless buzzer stops).
    • 60 seconds have elapsed after the warning started.
    • The power source mode is changed to a mode other than off.
    • Any door is opened (only wireless buzzer stops).
    • The doors are locked.
    • The vehicle speed is 5 km/h (3 mph) or more.

(9) Situation: The transmitter battery is weak.

  • The vehicle is driven using an electrical key transmitter sub-assembly that has a low transmitter battery.

    In this situation, the following control is performed:

    Reason for warning

    Preventing vehicle from becoming impossible to restart, usability function

    Warning Start Condition

    (Either Condition 1 or 2 is met)

    Condition 1 (All conditions are met)

    • The engine switch is turned off after being left on (IG) for more than 20 minutes.
    • The transmitter battery voltage is low.
    • The electrical key transmitter sub-assembly is in the vehicle.
    • No vehicle speed is detected.

    Condition 2 (All conditions are met)

    • The engine is off → the engine is started
    • The transmitter battery voltage is low.
    • The electrical key transmitter sub-assembly is in the vehicle.
    • No vehicle speed is detected.
    • Condition 1 has been met. (In the past)

    Warning description
    • The buzzer in the combination meter assembly sounds once.
    • "Key Battery Low" is displayed on the multi-information display in the combination meter assembly.

    Warning Stop Condition

    (Either condition is met)
    • 15 seconds have elapsed after the warning started.
    • The vehicle speed is 5 km/h (3 mph) or more.

(10) Situation: The steering cannot be released.

  • The steering cannot be released, thus the engine is prevented from starting.

    The shift lever is moved to a position other than P before the steering is unlocked.

    In this situation, the following control is performed:

    Reason for warning

    Usability function

    Warning Start Condition
    • Steering cannot be unlocked (judged by the steering lock ECU (steering lock actuator or upper bracket assembly)).

    Warning description
    • The buzzer in the combination meter assembly sounds once.
    • "Steering Wheel Lock Press Engine Switch while Turning Wheel" is displayed on the multi-information display in the combination meter assembly.

    Warning Stop Condition

    (Either condition is met)
    • 15 seconds have elapsed after the warning started.
    • The steering is unlocked.

(11) Situation: The smart access system with push-button start is malfunctioning.

  • A malfunction that interferes with the steering lock ECU (steering lock actuator or upper bracket assembly) or a vehicle speed signal malfunction is detected.

    In this situation, the following control is performed:

    Reason for warning

    Malfunction detection

    Warning Start Condition

    (One condition is met)
    • The steering lock ECU (steering lock actuator or upper bracket assembly), certification ECU (smart key ECU assembly) or unlock detection switch is malfunctioning.
    • The vehicle speed is judged as abnormal or vehicle speed signal communication is malfunctioning.

    Warning description
    • The buzzer in the combination meter assembly sounds once.
    • "Access System with Elec. Key Malfunction See Owner's Manual" is displayed on the multi-information display in the combination meter assembly.

    Warning Stop Condition

    (Either condition is met)
    • 15 seconds have elapsed after the warning started.
    • The system returns to normal.

(12) Situation: The engine does not start. (Situation A)

  • When the driver door is opened using the mechanical key and the engine switch is pressed, the electrical key transmitter sub-assembly cannot be detected in the vehicle, or when the engine switch is pressed, the electrical key transmitter sub-assembly cannot be detected two times in a row.

    In this situation, the following control is performed:

    Reason for warning

    Usability function

    Warning Start Condition

    (One condition is met)
    • The immobiliser system is set.
    • The electrical key transmitter sub-assembly is not in the vehicle.
    • Key code verification error occurs when the engine switch is pressed twice or the driver door key-linked unlock operation is performed.

    Warning description
    • The buzzer in the combination meter assembly sounds once.
    • "Depress Brake and Then Touch Key to Engine switch" is displayed on the multi-information display in the combination meter assembly.

    Warning Stop Condition

    (One condition is met)
    • 60 seconds have elapsed after the warning started.
    • The electrical key transmitter sub-assembly is in the vehicle. (Interior verification succeed or verification succeed when the transmitter battery is depleted and the electrical key transmitter sub-assembly was touched to the engine switch.)
    • The driver door is opened using the front door outside handle assembly (for driver door) and 30 seconds have elapsed.

(13) Situation: Immobiliser system certification completion occurs.

  • When the transmitter battery is depleted, the smart access system with push-button start is canceled or wave interference occurs, the electrical key transmitter sub-assembly is touched to the engine switch.

    In this situation, the following control is performed:

    Reason for warning

    Usability function

    Warning Start Condition
    • Electrical key transmitter sub-assembly certification result is OK.

    Warning description
    • The buzzer in the combination meter assembly sounds once.
    • "Depress Brake and Power to Start" is displayed on the multi-information display in the combination meter assembly.

    Warning Stop Condition

    (One condition is met)
    • 10 seconds have elapsed after the warning started.
    • The electrical key transmitter sub-assembly is detected by the vehicle.
    • The engine speed is at 500 rpm or more.
    • The vehicle can be driven.
    • The immobiliser system is set and key recognition is stopped or the key cannot be recognized.

(14) Situation: The engine does not start. (Situation B)

  • There are two patterns for this situation.
    • Pattern 1:

      The engine might be started (when the driver gets in the vehicle, or the engine switch is turned on (ACC)).

      In this situation, the following control is performed:

      Reason for warning

      Usability function

      Warning Start Condition

      (Either condition is met)
      • After the doors are unlocked from outside the vehicle with the engine switch off, the driver door is opened.
      • With the brake pedal not depressed, the engine switch is turned on (ACC).

      Warning description

      (Not displayed while the opening image is displayed.)
      • "Depress Brake and Power to Start" is displayed on the multi-information display in the combination meter assembly.

      Warning Stop Condition

      (One condition is met)
      • 19 seconds have elapsed after the warning started.
      • The engine is started.
      • The doors are locked from outside the vehicle.
      • The doors are locked by a wireless door lock operation from inside the vehicle.
    • Pattern 2:

      The engine might be started (when the engine switch is on (IG)).

      In this situation, the following control is performed:

      Reason for warning

      Usability function

      Warning Start Condition

      (Either condition is met)
      • With the brake pedal not depressed, the engine switch is turned on (IG) (the engine is not started).
      • The engine switch is on (IG) (the engine is not started) and the shift lever is moved from a position other than P or N to P or N.

      Warning description
      • "Depress Brake and Power to Start" is displayed on the multi-information display in the combination meter assembly.

      Warning Stop Condition

      (One condition is met)
      • The power source mode is changed to any mode other than on (IG).
      • The vehicle speed is 5 km/h (3 mph) or more.
      • The shift lever is moved to a position other than P or N.

(15) Situation: The engine switch cannot be turned off.

  • There are 2 patterns for this situation.
    • Pattern 1:

      A warning message appears on the multi-information display when the driver attempts to turn the engine switch off with the shift lever in any position other than P

      In this situation, the following control is performed:

      Reason for warning

      Prevention of battery discharge, prevention of vehicle roll-away

      Warning Start Condition
      • The engine switch is turned off with the shift lever in a position other than P or N. (Excluding an emergency stop by pressing the engine switch 3 times quickly or pressing and holding the engine switch for 2 seconds or more.)

      Warning description
      • The buzzer in the combination meter assembly sounds once.
      • "Shift to P Before Exiting Vehicle" is displayed on the multi-information display in the combination meter assembly.

      Warning Stop Condition

      (Either condition is met)
      • The shift lever is moved to P.
      • The power source mode is changed to a mode other than on (ACC).
    • Pattern 2:

      Under the situation of pattern 1, the shift lever is moved to P.

      In this situation, the following control is performed:

      Reason for warning

      Prevention of battery discharge

      Warning Start Condition
      • The shift lever is moved to P.

      Warning description
      • The buzzer in the combination meter assembly sounds once.
      • "Turn Off Vehicle" is displayed on the multi-information display in the combination meter assembly.

      Warning Stop Condition

      (Either condition is met)
      • The power source mode is changed to a mode other than on (ACC).
      • The shift lever is in any position other than P.

(16) Situation: Auto power off operation occurs.

  • A warning message appears on the multi-information display when an automatic power off operation occurs.

    In this situation, the following control is performed:

    Reason for warning

    Usability function

    Warning Start Condition

    (All conditions are met)
    • The shift lever is in P.
    • The engine switch is on (ACC) or on (IG).
    • No vehicle speed is detected and the engine is stopped.
    • The power source mode is changed to off by automatic power off function. (20 minutes have elapsed with the engine switch on (ACC) or 1 hour has elapsed with the engine switch on (IG).)

    Warning description
    • "Power Turned Off to Save Battery" is displayed on the multi-information display in the combination meter assembly.

    Warning Stop Condition

    (Either condition is met)
    • 10 seconds have elapsed after the warning started.
    • The engine switch is turned on (ACC) or on (IG).

(17) Situation: An electrical key transmitter sub-assembly has been registered.

  • A warning message appears on the multi-information display when an electrical key transmitter sub-assembly has been registered to the vehicle.

    In this situation, the following control is performed:

    Reason for warning

    Usability function

    Warning Start Condition

    (All conditions are met)
    • The engine switch is off.
    • The driver door is unlocked and opened.

    Warning description
    • "A New Key has been Registered Contact Your Dealer for Details" is displayed on the multi-information display in the combination meter assembly.

    Warning Stop Condition

    (One condition is met)
    • 60 seconds have elapsed after the warning started.
    • 10 days have elapsed since the warning was first displayed.
    • All doors are closed and locked.
    • The engine switch is on (IG).

(18) Situation: The shift lever is in a position other than P or N with the engine stopped.

  • A warning message appears on the multi-information display when the shift lever is in a position other than P or N while the engine switch is on (ACC) or on (IG) and the engine is stopped.

    In this situation, the following control is performed:

    Reason for warning

    Prevention of vehicle roll-away

    Warning Start Condition

    (All conditions are met)
    • The engine switch is on (IG).
    • No vehicle speed is detected.
    • The shift lever is in a position other than P or N.

    Warning description
    • The buzzer in the combination meter assembly sounds once.
    • "Engine Stopped Shift to P" is displayed on the multi-information display in the combination meter assembly.

    Warning Stop Condition

    (One condition is met)
    • The shift lever is moved to P or N.
    • The engine switch is turned off.
    • The vehicle speed is 5 km/h (3 mph) or more.

(19) Situation: The vehicle is moving with the engine switch on (IG) and the engine is stopped.

  • A warning message appears on the multi-information display if the vehicle begins moving when the engine switch is on (IG) and the engine is stopped.

    In this situation, the following control is performed:

    Reason for warning

    Prevention of vehicle roll-away

    Warning Start Condition

    (All conditions are met)
    • The engine switch is on (IG).
    • The shift lever is in a position other than P or N.
    • The engine is stopped.
    • The vehicle speed is 2 km/h (1 mph) or more.

    Warning description
    • The buzzer in the combination meter assembly sounds continuously.
    • "Engine Stopped Stop in a Safe Place" is displayed on the multi-information display in the combination meter assembly.

    Warning Stop Condition

    (One condition is met)
    • The shift lever is moved to N.
    • The engine switch is turned off.
    • The engine is started.
    • No vehicle speed is detected.
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