4WD Control ECU Communication Stop Mode [03/2020 - ]: Description

Detection Item	Symptom	Trouble Area
4WD Control ECU Communication Stop Mode	Any of the following conditions are met: Communication stop for "Four Wheel Drive Control" is indicated on the "Communication Bus Check" screen of the Techstream. Refer to PROBLEM SYMPTOMS TABLE [03/2020 - 10/2020] , or refer to PROBLEM SYMPTOMS TABLE [10/2020 - ] Communication stop history for "Four Wheel Drive Control" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Four Wheel Drive Control" is 6 or more.) Refer to PROBLEM SYMPTOMS TABLE [03/2020 - 10/2020] , or refer to PROBLEM SYMPTOMS TABLE [10/2020 - ] Communication system DTCs (DTCs that start with U) that correspond to "4WD Control ECU Communication Stop Mode" in "DTC Combination Table" are output. Refer to DTC COMBINATION TABLE [03/2020 - 10/2020] , or refer to DTC COMBINATION TABLE [10/2020 - 08/2021] , or refer to DTC COMBINATION TABLE [08/2021 - ]	4WD ECU assembly branch line or connector Power source circuit of 4WD ECU assembly 4WD ECU assembly ground circuit 4WD ECU assembly