Headlight ECU RH Communication Stop Mode [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.

Detection Item	Symptom	Trouble Area
Headlight ECU RH Communication Stop Mode	Communication stop for "Headlight Control (Sub)" is indicated on the "Communication Bus Check" screen of the GTS. Refer to DIAGNOSIS SYSTEM [10/2022 - 08/2023] , or refer to DIAGNOSIS SYSTEM [08/2023 - 10/2024] , or refer to DIAGNOSIS SYSTEM [10/2024 - ]	Headlight ECU sub-assembly RH branch line or connector Power source circuit of headlight ECU sub-assembly RH Headlight ECU sub-assembly RH ground circuit Headlight ECU sub-assembly RH Semiconductor power integration ECU