Toyota Innova: Using the Driving Support Systems - Lane Tracing Assist (LTA)

LTA Functions

The Lane Tracing Assist (LTA) system is designed to help maintain the vehicle's lane position. When driving on roads with clear lane lines and with the dynamic radar cruise control operating, the system uses the front camera and radar sensor to detect lane lines and surrounding vehicles. It then operates the steering wheel to keep the vehicle centered in its lane.

Important Usage Note: This function is intended for use only on highways and expressways.

The LTA system will not operate if the dynamic radar cruise control is not active. In situations where lane lines are difficult to see or are not visible, such as in traffic jams, the system will provide support by tracking the path of preceding and surrounding vehicles.

If the system detects that the steering wheel has not been operated for a certain period, or if it is not being gripped firmly, the driver will receive an alert, and the function will be temporarily canceled. If the steering wheel is gripped firmly, the function will resume operation.

When the function is active, the driver will be alerted via a display and buzzer if the vehicle is likely to depart from its lane. Upon hearing the buzzer, the driver should check the surroundings and carefully operate the steering wheel to guide the vehicle back to the center of the lane.

Diagram Description: A visual representation shows a car in the center of a lane, with dashed lines indicating the lane boundaries. Arrows show the car's path being guided by the LTA system, with a smaller car ahead also being tracked.

Before Using the LTA System

WARNING:

• Do not rely solely on the LTA system. It is a driving assistance feature, not a replacement for driver attention and control. The driver remains fully responsible for observing surroundings and operating the steering wheel to ensure safety.
• Drivers should take adequate breaks, especially during long journeys, to prevent fatigue.
• Failure to operate the vehicle appropriately and maintain careful attention can lead to accidents.
• When the LTA system is not in use, it should be turned off using the LTA switch.

Operating Conditions of Function

The LTA function operates when all of the following conditions are met:

• The LTA system can detect lane lines or the path of preceding or surrounding vehicles.
• The dynamic radar cruise control is operating.
• The lane width is approximately 3 to 4 meters (10 to 13 feet).
• The turn signal lever is not being operated.
• The vehicle is not navigating a sharp curve.
• The vehicle is not accelerating or decelerating significantly.
• The steering wheel is not being turned with excessive force.
• The hands-off steering wheel warning is not active.
• The vehicle is being driven in the center of the lane.

Temporary Cancellation of Functions

The function may be temporarily canceled if the operating conditions are no longer met. Operation will automatically resume when the conditions are met again. A buzzer may sound to indicate a temporary cancellation if the operating conditions cease while the function is active. The steering assist can be overridden by the driver's steering wheel input.

Lane Departure Warning Function When LTA is Operating

Even if the Lane Departure Alert (LDA) warning method is set to steering wheel vibration, a warning buzzer will sound if the vehicle deviates from the lane while LTA is active. The system will not provide a warning if it detects steering wheel operation equivalent to a lane change, assuming the vehicle is not deviating.

Hands Off Steering Wheel Warning Operation

If the system detects that the driver is not holding the steering wheel, a warning message and an icon will be displayed on the multi-information display, urging the driver to grip the wheel. The warning is canceled when the system detects the steering wheel is being held. Drivers should always grip the steering wheel firmly, regardless of whether a warning is active.

If no steering wheel operations are detected for a period, the warning will activate, and the function will be temporarily canceled. This warning may also trigger if the driver makes only small, continuous steering inputs.

Situations where the hands-off steering wheel warning may not operate properly: The warning function might not operate correctly depending on vehicle conditions, steering control, or road surface.

Enabling/Disabling the System

The LTA system can be toggled ON/OFF by pressing the LTA switch. When the LTA is ON, the LTA indicator will illuminate.

Diagram Description: An illustration shows a car's interior dashboard with a button labeled 'LTA'. Pressing this button controls the system's activation.

Situations in Which Functions May Not Operate Properly

WARNING: In the following situations, the LTA functions may not operate correctly, and the vehicle could depart from its lane. Do not rely solely on these functions. The driver is responsible for maintaining awareness and controlling the steering wheel.

• When a preceding or surrounding vehicle changes lanes (your vehicle may follow and change lanes).
• When a preceding or surrounding vehicle sways (your vehicle may sway and depart from the lane).
• When a preceding or surrounding vehicle departs from its lane (your vehicle may follow and depart from the lane).
• When a preceding or surrounding vehicle drives very close to a lane line (your vehicle may follow and depart from the lane).
• When moving objects or structures are present in the surrounding area (vehicle sway may occur depending on their position).
• When the vehicle is affected by a crosswind or turbulence from other vehicles.
• Situations where sensors may not operate properly.
• Situations where the lane may not be detected.
• When it is necessary to disable the system.

Operation Display of Steering Wheel Operation Support

The operating status of the LTA system is indicated through various displays: