DTC C1311: Open Circuit in Main Relay 1; DTC C1312: Short Circuit in Main Relay 1 [06/2018 - ]: Wiring Diagram
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.
Refer to DTC C1241.
Refer to DTC C1241: Low or High Power Supply Voltage [06/2018 - 08/2020] , or refer to DTC C1241: Low or High Power Supply Voltage [08/2020 - ]