Bus Buffer ECU Communication Stop Mode [03/2019 - ]: Description

Detection Item	Symptom	Trouble Area
Bus Buffer ECU Communication Stop Mode	Either condition is met: Communication stop for "Accessory Gateway" is indicated on the "Communication Bus Check" screen of the Techstream. Refer to PROBLEM SYMPTOMS TABLE [03/2019 - 01/2023] , or refer to PROBLEM SYMPTOMS TABLE [01/2023 - ] Communication system DTCs (DTCs that start with U) that correspond to "Bus Buffer ECU Communication Stop Mode" in "DTC Combination Table" are output. Refer to DTC COMBINATION TABLE [03/2019 - 09/2020] , or refer to DTC COMBINATION TABLE [09/2020 - 01/2023] , or refer to DTC COMBINATION TABLE [01/2023 - 10/2023] , or refer to DTC COMBINATION TABLE [10/2023 - ]	Option connector (bus buffer ECU) branch line or connector Power source circuit of option connector (bus buffer ECU) Option connector (bus buffer ECU) ground circuit Option connector (bus buffer ECU)