Subaru Solterra 2023-2026 Owner's Manual: LDA (Lane Departure Alert)

Basic functions

In the Subaru Solterra, the Lane Departure Alert (LDA) system is designed to assist the driver by monitoring the vehicle’s position relative to lane markings or road boundaries*. When the system detects a potential deviation, it provides timely warnings and can also apply gentle steering input to help guide the Subaru Solterra back toward the intended path.

The Subaru Solterra uses a forward-facing camera to identify lane lines or road edges such as the boundary between asphalt and grass, soil, or fixed structures like curbs and guardrails.

*: Boundary between the asphalt and grass, soil, etc., or structures, such as a curb, guardrail, etc.

■ Lane departure alert function

When the Subaru Solterra determines that the vehicle may unintentionally leave its lane or course*, a warning is displayed on the instrument panel, accompanied by either an audible alert or steering wheel vibration to draw the driver’s attention.

When alerted, always check the surroundings and carefully steer the Subaru Solterra back toward the center of the lane or course.

If the system detects a risk of collision with a vehicle in an adjacent lane, the Subaru Solterra LDA alert will activate even if the turn signals are in use, prioritizing safety over driver input.

*: Boundary between the asphalt and grass, soil, etc., or structures, such as a curb, guardrail, etc.

■ Lane departure prevention function

If the Subaru Solterra detects that the vehicle is about to leave its lane or course*, it can provide corrective steering assistance to help maintain proper lane positioning.

If the system determines that the steering wheel has not been actively controlled or that the driver is not maintaining a firm grip, a warning message and buzzer may be activated to prompt driver intervention.

When there is a risk of collision with a vehicle in a neighboring lane, the Subaru Solterra lane departure prevention function may activate regardless of turn signal use.

*: Boundary between the asphalt and grass, soil, etc., or structures, such as a curb, guardrail, etc.

■ Break suggestion function

The Subaru Solterra is equipped with a fatigue detection feature that monitors vehicle movement patterns. If irregular swaying or unstable driving is detected, a message and warning sound will advise the driver to take a break.

WARNING

■ Before using the LDA system

• Do not rely solely on the Subaru Solterra LDA system, as it is not designed for autonomous driving.

  The driver must remain fully attentive to road conditions and surrounding traffic at all times. The system is intended only as a support feature and does not reduce the responsibility of safe driving. Drivers should also take regular breaks during long trips to avoid fatigue.

• Failure to maintain proper control and awareness while driving the Subaru Solterra may result in serious accidents or hazardous situations.

The Subaru Solterra Lane Departure Alert system enhances driving safety by providing timely warnings and subtle steering assistance, helping the driver maintain proper lane position while remaining fully in control of the vehicle.

■ Operating conditions of each function

• Lane departure alert/prevention function

In the Subaru Solterra, these functions are designed to operate only when all required conditions are satisfied, ensuring reliable and accurate assistance during driving.

This function is operable when all of the following conditions are met:

• The Subaru Solterra is traveling at a speed of approximately 30 mph (50 km/h) or higher.

  In certain situations, operation may begin at speeds around 25 mph (40 km/h) if nearby vehicles, motorcycles, bicycles, or pedestrians are detected along the lane.

• The system successfully recognizes lane markings or a defined course*. (If detection is possible on only one side, the Subaru Solterra will provide support only on that side.)
• The lane width is approximately 9.8 ft. (3 m) or greater, allowing sufficient space for accurate detection.
• The turn signal lever is not in use, except when the Subaru Solterra detects a vehicle in the direction indicated by the signal.
• The vehicle is not navigating sharp or complex curves.
• The Subaru Solterra is not undergoing strong acceleration or deceleration.
• The steering wheel is not being turned significantly, such as during an intentional lane change.
• The VSC (Vehicle Stability Control) and TRAC (Traction Control) systems are active and not disabled.

*: Boundary between the asphalt and grass, soil, etc., or structures, such as a curb, guardrail, etc.

■ Temporary cancelation of functions

If any of the above conditions are no longer met, the Subaru Solterra LDA functions may temporarily deactivate. Once all required conditions are restored, the system will automatically resume operation without driver intervention.

■ Operation of the lane departure alert function/lane departure prevention function

• Depending on factors such as Subaru Solterra vehicle speed, road surface, and departure angle, the corrective steering assistance may be subtle or may not activate.
• Even if steering wheel vibration is selected in the settings, the Subaru Solterra may still use an audible warning depending on the situation.
• If the detected course* is unclear, inconsistent, or not straight, the system may not function properly.
• The Subaru Solterra may not activate these functions if it determines that the driver is intentionally steering to avoid an obstacle such as a pedestrian or parked vehicle.
• In some cases, the system may not be able to accurately determine the risk of collision with vehicles in adjacent lanes.
• The timing of warnings and interventions in the Subaru Solterra may vary depending on driver condition and driving behavior.
• The driver can always override steering assistance by applying manual steering input at any time.

*: Boundary between the asphalt and grass, soil, etc., or structures, such as a curb, guardrail, etc.

■ Hands off steering wheel warning operation

In the Subaru Solterra, if the system detects that the driver is not maintaining proper contact with the steering wheel, a visual message and icon will appear, accompanied by an audible alert prompting the driver to take control.

Even if no warning is currently displayed, always keep both hands on the steering wheel when using Subaru Solterra driver assistance systems to ensure safe and stable operation.

Maintaining proper steering input helps the Subaru Solterra systems function more effectively and ensures a higher level of driving safety in all conditions.

• In the Subaru Solterra, if the system detects that the driver is not firmly holding the steering wheel, or that no steering input is being applied while the lane departure prevention steering assist is active, a warning will be triggered to prompt driver engagement.

As the frequency of steering assist interventions increases in the Subaru Solterra, the duration of the warning buzzer will also gradually extend. This is designed to ensure that the driver remains attentive and responsive to system prompts.

If the Subaru Solterra detects that the steering wheel has been actively operated, the warning buzzer may stop. However, in certain situations, the buzzer may continue sounding briefly even after driver input is detected, reinforcing the need for consistent steering control.

■ Break suggestion function

The Subaru Solterra break suggestion function operates when all of the following conditions are satisfied:

• The vehicle speed is approximately 32 mph (50 km/h) or higher
• The detected lane width is approximately 9.8 ft. (3 m) or greater

Depending on driving conditions, vehicle behavior, or road surface quality, the Subaru Solterra may not always activate this function even if fatigue-like driving patterns are present.

Changing LDA settings

• The Subaru Solterra LDA system can be turned ON or OFF through the vehicle’s customization menu.
• Additional configuration options for the Subaru Solterra Lane Departure Alert can also be adjusted to match driver preferences and driving conditions.

WARNING

■ Situations in which the system may not operate properly

In certain driving environments, the Subaru Solterra Lane Departure Alert system may not perform as expected, and unintended lane deviation may occur. Always remain alert and keep full control of the vehicle.

• When road boundaries, such as the edge between asphalt and grass or physical structures like curbs and guardrails, are unclear, faded, or irregular
• When the Subaru Solterra is affected by strong crosswinds or turbulence from surrounding vehicles
• In situations where lane markings cannot be properly detected
• When sensors are obstructed, dirty, or not functioning correctly
• When system limitations prevent partial or full operation of assistance features
• When it is necessary to manually disable the Subaru Solterra LDA system for safety reasons

Displays and system operation

The Subaru Solterra provides clear visual indicators on the instrument panel to show the current status of the lane departure alert and steering assist functions.

These indicators help the driver understand when the Subaru Solterra LDA system is active, providing additional confidence and awareness during operation.