Monitor Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
The skid control ECU (brake booster with master cylinder assembly) has a self-diagnosis function. When an EEPROM, serial communication, CPU or IC malfunction is detected during self-diagnosis, the skid control ECU (brake booster with master cylinder assembly) illuminates the MIL and stores a DTC.