TRAIL Switch Circuit [10/2022 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
The TRAIL mode signal will be sent to the 4WD ECU assembly when the TRAIL mode switch (electric parking brake switch assembly) is operated. If the specified conditions are met, the system enters TRAIL mode and the vehicle will be driven using TRAIL mode. This signal is then transmitted from the 4WD ECU assembly via CAN to the combination meter assembly to illuminate the TRAIL indicator.