Subaru Ascent 2018-2026 Owner's Manual: Safety precautions

WARNING

• If you are using an implanted pacemaker or defibrillator, maintain a safe distance of at least 8.7 in (22 cm) from the transmitting antennas installed in the Subaru Ascent.

  The Subaru Ascent keyless access system emits radio waves that may interfere with the normal operation of implanted medical devices. This interference, although rare, could potentially affect device performance.

  If you rely on other electronic medical equipment, consult both the equipment manufacturer and relevant Subaru Ascent documentation before using the keyless access with push-button start system. Understanding how radio frequency signals interact with medical devices is critical for ensuring safe operation.

  Refer to the section titled "Radio waves used for the keyless access with push-button start system" for additional technical details.

• The Subaru Ascent keyless access system operates using radio waves, including a frequency of approximately 134 kHz, in addition to signals used by the remote keyless entry system. These signals are periodically transmitted from antennas located throughout the vehicle.

* Radio frequency: 134 kHz

1. Antennas

CAUTION

• Never leave the Subaru Ascent access key fob inside the vehicle or within a radius of approximately 6.6 ft (2 m). Doing so may result in accidental lock-in or unnecessary battery drain. In certain conditions, the push-button ignition system may not function properly depending on the fob's position.
• The Subaru Ascent access key fob contains sensitive electronic components. To ensure long-term reliability, observe the following precautions:
  • Have the battery replaced by an authorized SUBARU dealer to avoid damage or incorrect installation.
  • Avoid exposure to water. If the key fob becomes wet, dry it immediately and thoroughly.
  • Protect the key fob from strong impacts or drops.
  • Do not expose the key fob to direct sunlight or high temperatures, such as leaving it on the dashboard.
  • Do not clean the key fob using ultrasonic devices.
  • Avoid storing the key fob in humid or dusty environments, as this may cause malfunction.

    Always keep it in a clean and dry location.

  • Keep the Subaru Ascent key fob away from strong magnetic fields.
  • Do not place the key fob near computers, household appliances, or charging devices.
  • Avoid proximity to battery chargers or electrical accessories that may interfere with signal transmission.
  • Do not apply metallic window tint or attach metallic objects to windows, as this may disrupt signal communication.
  • Use only genuine Subaru Ascent accessories to ensure compatibility with the keyless system.
• If the Subaru Ascent access key fob is dropped, the internal emergency key may become loose. Check and secure it to prevent loss.
• When traveling by airplane, avoid pressing any buttons on the Subaru Ascent key fob. Radio signals may interfere with aircraft systems. Store the key in a way that prevents accidental button activation.

NOTE

• The Subaru Ascent keyless access function can be customized to operate or be disabled depending on user preferences.
• For operation of the push-button ignition when keyless access is disabled, refer to the section "Access key fob - if access key fob does not operate properly".
• The Subaru Ascent keyless system uses low-power radio signals. Environmental factors and surrounding electronic devices may interfere with communication between the vehicle and the key fob under the following conditions:
  • Near facilities transmitting strong radio signals, such as broadcast towers or power lines
  • When using other radio transmitters, such as another vehicle's key fob
  • When carrying multiple key fobs together
  • When the Subaru Ascent key fob is near mobile phones or wireless communication devices
  • When placed near metallic objects or accessories
  • When carried alongside electronic devices such as laptops
  • When the key fob battery is weak or discharged
• The Subaru Ascent access key fob continuously communicates with the vehicle, which results in gradual battery consumption even when not actively used. Regular battery checks are recommended.

Understanding these Subaru Ascent safety precautions ensures reliable operation of the keyless access system and helps prevent unexpected issues related to signal interference, battery life, or electronic compatibility.

In the Subaru Ascent, the lifespan of the access key fob battery depends on usage patterns and environmental conditions, but under normal circumstances it typically ranges from approximately 1 to 2 years. Frequent use of remote functions or exposure to extreme temperatures may reduce battery life.

If the battery in your Subaru Ascent key fob becomes fully discharged, it should be replaced promptly with a new one to ensure uninterrupted operation of the keyless access and push-button start system.

Once the steering lock engages, the initialization process in the Subaru Ascent is successfully completed.

• To prevent operational issues, do not leave the Subaru Ascent access key fob in the following locations:
  • On the instrument panel
  • On the floor of the vehicle
  • Inside the glove box
  • Within door storage compartments
  • On the rear seats
  • In the cargo area

If the Subaru Ascent key fob is left in these areas, the following issues may occur.

• The access key fob may become unintentionally locked inside the Subaru Ascent.
• The system may generate false warning messages even when no actual malfunction is present.
• In some cases, real system malfunctions may not trigger any warning alerts.

Proper handling and storage of the Subaru Ascent access key fob ensures reliable operation, extended battery life, and enhanced vehicle security in everyday use.