Toyota bZ4X Owner's Manual: Smart Key System

The smart key system empowers you to perform a range of operations simply by carrying the electronic key on your person-whether it’s tucked in your pocket or securely stored in your purse. For optimal convenience and security, the driver should always have the electronic key with them.

This innovative system automatically recognizes the key’s proximity, allowing for seamless functions such as unlocking the doors, starting the engine, and even accessing trunk or back door functions-all without having to physically insert a key. Such hands-free operation not only enhances everyday ease but also bolsters vehicle security by restricting access to those who possess the key.

Enhanced with advanced sensor technology, the smart key system continuously monitors the surrounding area for the electronic key. Once detected, the system promptly enables full access to the vehicle, streamlining the process of entering and starting the car. This intelligent integration minimizes manual steps and provides a smooth, sophisticated user experience.

Furthermore, the system is designed to integrate with other vehicle features, allowing remote activation of additional functions and ensuring that critical operations are responsive and secure. Whether you’re loading groceries or preparing for a quick departure, the smart key system guarantees that your vehicle responds intuitively.

Experience peace of mind and unmatched convenience with this cutting-edge technology. Innovative vehicles like the Toyota bZ4X demonstrate how modern automotive design can transform your daily drive by combining security, efficiency, and effortless access.

• Locks and unlocks the doors
• Locks and unlocks the back door
• Starts the EV system

Antenna location

1. Antennas outside the cabin (front [if equipped])
2. Antennas outside the cabin (rear) (if equipped)
3. Antennas inside the cabin
4. Antenna inside the luggage compartment
5. Antenna outside the luggage compartment
6. Antennas outside the cabin (vehicles with Advanced Park with remote control function)

Effective range (areas within which the electronic key is detected)

1. When locking or unlocking the doors

The system can be operated when the electronic key is within about 2.3 ft. (0.7 m) of the driver's door handle, front passenger's door handle (if equipped), rear door handles (if equipped) and back door opener switch (if equipped). (Only the doors detecting the key can be operated.)

2. When starting the EV system or changing power switch modes

The system can be operated when the electronic key is inside the vehicle.

If an Alarm Sounds or a Warning Message is Displayed

When an alarm sounds or a warning message is shown on the multi-information display, it is a critical alert designed to protect against unexpected accidents or potential theft caused by erroneous operations. These signals help you immediately recognize that something may be amiss and prompt you to take corrective measures.

If a warning message appears, be sure to carefully review the instructions on the display and act accordingly. These instructions are tailored to address the specific safety issue at hand, ensuring that the right steps are taken to secure the vehicle.

In situations where only an alarm is heard, follow these correction procedures:

• Exterior Alarm: If an exterior alarm sounds once for approximately 5 seconds, it indicates an attempt was made to lock the vehicle while one or more doors were open. The appropriate corrective action is to close all the doors completely and then lock them again.

Situation → Correction Procedure:
If the alarm sounds because of an open door during a locking attempt, simply ensure every door is secured and retry locking the doors.

• Interior Alarm: If an interior alarm pings continuously, it usually signifies that the power switch was turned to ACC while the driver's door was open-or that the door was opened while the switch was in ACC mode. To correct this, promptly turn the power switch to OFF and close the driver’s door.

Situation → Correction Procedure:
When an interior alarm is active, reset the system by switching the power OFF and securely shutting the driver’s door.

Battery-Saving Function

To prevent battery discharge when the vehicle is not in use for an extended period, the battery-saving function automatically engages. This feature safeguards both the electronic key battery and the 12-volt battery, ensuring the vehicle remains ready for operation.

• The smart key system might respond more slowly if:
  • The electronic key has been left outside the vehicle (approximately 11.5 ft or 3.5 m away) for 2 minutes or longer.
  • The smart key system has not been used for 5 days or more.
• Moreover, if the smart key system remains unused for 14 days or longer, only the driver’s door will unlock automatically. In such cases, use the driver’s door handle, wireless remote control, or the mechanical key to access the vehicle.

These comprehensive safety features-from proactive alarm and warning responses to intelligent battery-saving mechanisms-ensure that the vehicle remains secure and that any issues are promptly highlighted for corrective action. They offer drivers clear, step-by-step guidance on resolving potential hazards, ultimately contributing to a safer driving environment.

This integrated system exemplifies the sophistication of modern automotive technology, as seen in innovative models like the Toyota bZ4X, where convenience, security, and advanced intelligence converge to create a seamless user experience.

Turning an electronic key to battery-saving mode

• When battery-saving mode is set, battery depletion is minimized by stopping the electronic key from receiving radio waves.

Press twice while pressing and holding .

Confirm that the electronic key indicator flashes 4 times.

While the battery-saving mode is set, the smart key system cannot be used. To cancel the function, press any of the electronic key buttons.

Electronic keys that will not be used for long periods of time can be set to the battery-saving mode in advance.

Conditions Affecting Smart Key Operation

The smart key system relies on low-power radio waves to communicate with the vehicle. However, its performance can be compromised under certain conditions that may interfere with the connection between the electronic key and the car’s systems-including the smart key, wireless remote, and immobilizer functions.

Interference from External Factors

Communication disruptions can occur under several circumstances:

• When the electronic key battery is nearly depleted, reducing its signal strength.
• In areas with strong radio wave emissions, for example, near TV towers, electric power plants, gas stations, radio stations, large digital displays, airports, or similar facilities that generate significant electrical noise.
• When the electronic key comes into contact with or is covered by metallic objects. Metallic interference can be caused by items such as:
  • Cards wrapped in aluminum foil
  • Metallic wallets or bags
  • Loose coins
  • Metal-based hand warmers
  • Media objects like CDs and DVDs
• When another wireless key that emits radio waves is used nearby.
• When carrying the electronic key along with devices that emit radio waves (for instance, portable radios, cellular phones, cordless phones, personal computers, digital assistants, audio players, or portable game systems).
• If window tint containing metallic components or other metallic objects are attached to the rear window.
• When the electronic key is positioned near a battery charger or other electronic devices, or if the vehicle is parked in a pay parking spot where extra radio frequency emissions are present.

Entry Function Considerations

Even when the electronic key is within the effective detection range, its functionality might be affected by its placement or surrounding conditions:

• The key may not be recognized correctly if it is too close to the window, an exterior door handle, or positioned near the ground or at an elevated location during locking or unlocking operations.
• Avoid placing the electronic key on surfaces such as the instrument panel, luggage cover, or floor, or storing it in door pockets or the glove box when changing EV system modes or the power switch position.
• Do not leave the key atop the instrument panel or near door pockets when exiting the vehicle; poor positioning might enable the car’s antenna to inadvertently detect the key from outside, potentially locking the doors and trapping the key inside.
• As long as the key remains in the effective range, any individual near the car might be able to lock or unlock the doors; however, only those doors that successfully detect the key are operable for securing the vehicle.
• The EV system might start if the electronic key is near a window-even if the key is not physically inside the cabin.
• In heavy rain or during a car wash, a large amount of water splashing on a door handle may cause the door to unlock and then automatically lock again after about 60 seconds if no further action is taken.
• If a wireless remote is used to lock the doors while the electronic key is in close proximity, the entry function might fail to unlock them. In such cases, use the remote to unlock the doors.
• Wearing gloves while touching the door lock sensor might delay or inhibit its operation. Remove the gloves and try again.
• When the door lock sensor is activated, the system will display recognition signals up to two consecutive times and then cease further signals.
• If a door handle becomes wet while the electronic key remains in the effective range, the door might begin to lock and unlock repeatedly. To resolve this issue, move the electronic key to a location at least 6 ft (2 m) away from the vehicle (while ensuring it remains secure) or set it to battery-saving mode.
• In instances where the key is inside the vehicle and a door handle becomes wet, a warning message and buzzer alert may appear; simply locking all doors typically cancels the alert.
• The lock sensor may malfunction if it comes into contact with ice, snow, or mud. Carefully clean the sensor and try operating the door lock once more.
• A sudden proximity to the effective range or rapid movement of the door handle might temporarily prevent the door from unlocking. Return the handle to its original position and attempt the operation again.
• If more than one electronic key is detected, unlocking may take slightly longer after gripping the door handle.

Extended Non-Usage and Security

• When the vehicle is not driven for long periods, do not position the electronic key within 6 ft (2 m) of the car to deter potential theft.
• The smart key system can be deactivated in advance, and battery-saving mode can help reduce the key’s power consumption.

Proper System Operation

To ensure optimal performance, always carry the electronic key with you when operating the system, and avoid placing it too close to the vehicle when you are outside. The key’s exact positioning and how it is held can greatly affect detection accuracy, possibly causing accidental alarms or malfunctioning door lock prevention.

Troubleshooting Smart Key Issues

If the doors fail to lock or unlock:

• Bring the electronic key closer to the door handle and attempt to lock or unlock again.
• Alternatively, use the wireless remote control.

Should these methods fail, use the mechanical key. Note that operating the mechanical key when the alarm system is engaged will trigger a warning sound.

Additionally, if the EV system does not start, refer to the troubleshooting guidelines provided in your vehicle manual.

Customization Options

The smart key system settings can be customized to suit your preferences. For example, if you have deactivated the smart key system in your customized settings, you will need to rely on:

• The wireless remote control or mechanical key for locking and unlocking the doors.
• Manual operations for starting the EV system, switching power modes, and stopping the EV system.

Warning: Interference with Electronic Devices

Caution Regarding Interference with Electronic Devices

• Individuals with implantable cardiac pacemakers, cardiac resynchronization therapy pacemakers, or implantable cardioverter defibrillators should maintain a safe distance from the smart key system antennas. Radio waves emitted by the system might interfere with the operation of such devices.

The radio frequencies used by the smart key system could affect medically sensitive equipment. If necessary, the entry function can be disabled-consult your vehicle dealer for details including radio wave frequency and emission timing, and check with your doctor to determine if the entry function should be disabled.

• Users of other electrical medical devices should consult the device manufacturer for information regarding susceptibility to radio frequency interference.

Ask your Toyota dealer for details on disabling the entry function if you experience issues related to nearby electronic devices.

Experience unparalleled security and convenience with smart key technology. This advanced system, featured in innovative vehicles such as the Toyota bZ4X, optimizes everyday access and enhances vehicle protection. Whether you’re navigating urban environments or heading out on a long drive, these intelligent features ensure your car remains secure and responsive-every interaction is engineered for safety and ease.