Certification ECU Communication Stop Mode [11/2017 - ]: Description

Detection Item	Symptom	Trouble Area
Certification ECU Communication Stop Mode	Either condition is met: Communication stop for "Certification (Smart)" is indicated on the "Communication Bus Check" screen of the Techstream. Refer to PROBLEM SYMPTOMS TABLE [11/2017 - 08/2018] , or refer to PROBLEM SYMPTOMS TABLE [08/2018 - ] 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 [11/2017 - 08/2018] , or refer to DTC COMBINATION TABLE [08/2018 - ]	Power source circuit of certification ECU (smart key ECU assembly) Certification ECU (smart key ECU assembly) ground circuit Certification ECU (smart key ECU assembly) branch wire or connector Certification ECU (smart key ECU assembly)

HINT:

For vehicle with smart key system only.