Certification ECU Communication Stop Mode [03/2017 - 05/2023]: Description

Detection Item	Symptom	Trouble Area
Certification ECU Communication Stop Mode	Any of the following conditions are met: Communication stop for "Certification (Smart)" is indicated on the "Communication Bus Check" screen of the Techstream. Refer to PROBLEM SYMPTOMS TABLE [03/2017 - 04/2020] , or refer to PROBLEM SYMPTOMS TABLE [04/2020 - 05/2023] Communication stop history for "Certification (Smart)" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Certification (Smart)" is 6 or more.) Refer to PROBLEM SYMPTOMS TABLE [03/2017 - 04/2020] , or refer to PROBLEM SYMPTOMS TABLE [04/2020 - 05/2023] Communication system DTCs (DTCs that start with U) that correspond to "Certification ECU Communication Stop Mode" in "DTC Combination Table" are output. Refer to DTC COMBINATION TABLE [03/2017 - 06/2019] , or refer to DTC COMBINATION TABLE [06/2019 - 04/2020] , or refer to DTC COMBINATION TABLE [04/2020 - 11/2021] , or refer to DTC COMBINATION TABLE [11/2021 - 05/2023]	Certification ECU (smart key ECU assembly) branch wire or connector Power source circuit of certification ECU (smart key ECU assembly) Certification ECU (smart key ECU assembly) ground circuit Certification ECU (smart key ECU assembly)