Bus Buffer ECU Communication Stop Mode [06/2018 - 08/2021]: Description

Detection Item	Symptom	Trouble Area
Bus Buffer ECU Communication Stop Mode	Any of the following conditions are met: Communication stop for "Accessory Gateway" is indicated on the "Communication Bus Check" screen of the Techstream. Refer to PROBLEM SYMPTOMS TABLE [06/2018 - 08/2020] , or refer to PROBLEM SYMPTOMS TABLE [08/2020 - 08/2021] Communication stop history for "Accessory Gateway" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Accessory Gateway" is 6 or more.) Refer to PROBLEM SYMPTOMS TABLE [06/2018 - 08/2020] , or refer to PROBLEM SYMPTOMS TABLE [08/2020 - 08/2021] 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 [06/2018 - 10/2019] , or refer to DTC COMBINATION TABLE [10/2019 - 08/2020] , or refer to DTC COMBINATION TABLE [08/2020 - 08/2021]	Option connector (bus buffer ECU) branch line or connector CAN compatible optional device Power source circuit of option connector (bus buffer ECU) Option connector (bus buffer ECU) ground circuit