Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix procedures described in individual Service Bulletins. This bulletin details the Global Techstream+ (GTS+) ECU flash reprogramming procedures and outlines the use of the Technical Information System (TIS) and the Calibration Update Wizard+ (CUW+). To ensure the correct ECU software is installed, ECUs will require a Security Signature before the ECU initializes the flash reprogramming sequence.
A new head unit software update (version 2300) is available via OTA or USB for 2022 – 2026 model year LX 600, NX 250, NX 350, and NX 350h; 2023 model year LS 500; 2023 – 2024 model year UX 250h; 2023 – 2025 model year ES 250, ES 300h, ES 350, LS 500h, RZ 300e, and RZ 450e; 2023 – 2026 model year RX 350, RX 350h, and RX 500h; 2024 – 2026 model year GX 550, LC 500, LC 500c, LC 500h, LS 500, RX 450h+, TX 350, TX 500h, and TX 550h+; 2025 model year UX 300h; 2025 – 2026 model year LX 700h; 2026 model year IS 350, RZ 350e, RZ 450e, and RZ 550e vehicles equipped with Lexus Multimedia versions older than 2300. This Software Update includes the following improvements: •User Interface •Cloud Navigation •Bug fixes Vehicle operators can perform this update directly by accepting the on-screen notification advising that the software update is available, or by locating the software update from the Settings menu and initiating the available update. The release message below will be displayed to the customer: “This software update includes improvements for User Interface, Cloud Navigation, and Bug fixes.” If it is necessary to perform the software update for a customer, follow the software update procedures in this bulletin. This is a phased rollout, which means that as time progresses, more vehicles will receive the update notification and ability to update the head unit. This timing will vary by location and may not display for every vehicle in one location at the same day/time.
During the manufacturing process, tires are mounted on the vehicle as matched sets to help reduce conditions such as pulling or drifting. If the wheels are replaced or refinished before vehicle delivery, it is important that the tires remain on the vehicle in the same location and in the same direction of rotation.
A battery in a stored vehicle is subject to conditions that can reduce its performance and service life. These conditions include storage period, temperature, parasitic drain, and battery load. Because of these factors, battery inspection and maintenance are required in order to ensure proper operation and optimal battery life.