Toyota bZ4X Owner's Manual: Parking Brake Operation

The parking brake can be engaged or released either automatically or manually, providing flexibility depending on driving conditions. While automatic mode allows the system to operate on its own, manual control is always available for greater precision.

Automatic Mode

In this mode, the parking brake is set and released automatically based on vehicle status. For instance, when you shift into park (P), the brake engages, and when you press the accelerator to move forward, the brake releases seamlessly.

Manual Mode

Even when automatic mode is enabled, you can manually set or release the parking brake using the designated control. This is useful for situations requiring precise parking adjustments, such as stopping on a steep incline or when performing maintenance tasks.

Understanding when to use manual or automatic mode ensures a secure driving experience, particularly in varying road conditions. Regularly checking the system's function helps prevent unexpected issues, keeping the vehicle stable in any parking situation.

1. Parking brake indicator light (U.S.A.)
2. Parking brake indicator light (Canada)

1. Pull the switch to set the parking brake

The parking brake indicator light will turn on.

Pull and hold the parking brake switch if an emergency occurs and it is necessary to operate the parking brake while driving.

2. Push the switch to release the parking brake

• Operate the parking brake switch while depressing the brake pedal.
• Using the parking brake automatic release function, the parking brake can be released by depressing the accelerator pedal

Make sure that the parking brake indicator light turn off.

If the parking brake indicator light flash, operate the switch again.

Understanding how to control the parking brake is essential for safe and efficient driving. The parking brake can be engaged or released either automatically by the system or manually by the driver, providing versatile control over the vehicle’s stationary functions.

When the vehicle is stopped, you can activate automatic mode by pulling and holding the parking brake switch until a buzzer sounds and a message appears on the multi-information display. Once active, the system behaves as follows:

• When shifting out of Park (P), the parking brake is automatically released and the indicator light turns off.
• When shifting into Park (P), the parking brake is set and the indicator light turns on.

Always change the shift position with the vehicle completely stopped and the brake pedal depressed. If you shift too quickly, the automatic function might not operate properly-in such cases, use the manual mode instead.

With the vehicle stationary and the brake pedal depressed, press and hold the parking brake switch until the buzzer sounds and the display confirms mode deactivation. This gives you full manual control when needed.

If the power switch is not ON, you cannot release the parking brake using the switch, and the automatic functions will be disabled. Always ensure the vehicle’s electrical system is active before attempting any operations.

In manual mode, the parking brake can be automatically released by slowly depressing the accelerator pedal-provided all of the following conditions are met:

• The driver’s door is closed.
• The driver is wearing a seat belt.
• The shift position is in a forward or reverse driving mode.
• The brake system warning light is not illuminated.

If the parking brake does not release when you press the accelerator, manually release it.

An automatic lock function will engage the parking brake if these conditions occur:

• The brake pedal is not pressed.
• The driver’s door is open.
• The driver’s seat belt is not fastened.
• The shift position is in a mode other than Park (P) or Neutral (N) (or remains in Park during advanced park operations, if equipped).
• No brake system warnings are present.

If the parking brake is used repeatedly in a short period, the system may restrict operation to prevent overheating. Normal function typically resumes after about one minute. If a message such as "Parking Brake Unavailable" appears on the display after several attempts, it may indicate a malfunction-consult a qualified technician for inspection.

When the parking brake operates, you may hear a whirring sound from the motor; this is normal. The parking brake indicator light behaves as follows:

• With the power switch ON, the light remains illuminated until the brake is released.
• With the power switch OFF, the light stays on for approximately 15 seconds.
• If the power switch is turned off while the brake is engaged, the indicator light continues for about 15 seconds without indicating a malfunction.

If the parking brake switch malfunctions, the system automatically engages the automatic mode to maintain safety. In addition, if you drive with the parking brake engaged, a warning buzzer will sound and the multi-information display will show "Parking Brake ON" once the vehicle exceeds 3 mph (5 km/h).

In cold weather or on slippery roads, brake performance can vary. Monitor the indicators closely, and if the parking brake does not release as expected when accelerating, release it manually to ensure safe operation.

This comprehensive parking brake control system not only improves safety and vehicle performance but also enhances energy efficiency. Advanced integration in modern vehicles streamlines these functions, ensuring reliable operation even under challenging conditions. By following these guidelines, you can confidently manage the parking brake for a smoother and safer driving experience. If you notice any irregularities, consult your owner’s manual or visit a professional service center.

WARNING: When Parking the Vehicle

Do not leave a child unattended in the vehicle. If the parking brake releases unintentionally, the vehicle could start moving, posing a severe risk of accident, injury, or death.

Parking Brake Switch

Do not place any objects near the parking brake switch. External objects may interfere with the switch’s operation, causing the parking brake to engage unexpectedly.

Parking Brake Automatic Lock Function

Avoid relying solely on the automatic parking brake engagement function as a substitute for normal parking brake operation. This feature is meant to reduce collision risks if the driver forgets to engage the brake, but over-reliance on it may lead to dangerous situations, potentially resulting in serious injury or death.

NOTICE: General Parking Procedures

Before leaving the vehicle, always shift into Park (P), set the parking brake, and verify that the vehicle does not move.

NOTICE: System Malfunctions

If any warning messages appear or the system malfunctions, safely stop the vehicle and review the messages before proceeding.

NOTICE: Discharged 12-Volt Battery

A discharged 12-volt battery disables the parking brake system. Always check the battery status to ensure proper operation.

NOTICE: Inability to Release the Parking Brake

If the parking brake cannot be released due to a malfunction, continuing to drive with the brake engaged may overheat brake components, impair braking performance, and increase wear. In such cases, have the vehicle inspected immediately by your authorized service center.

Regular maintenance and adherence to these guidelines are essential for ensuring safe and reliable operation. By following these instructions, you not only reduce risks associated with unintended brake engagement or release but also promote longevity and efficiency in the braking system. This attention to detail exemplifies the advanced engineering found in modern vehicles, such as one standout model from Toyota.