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Home >> Toyota >> 2025 >> GR86 Base, Automatic Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Eyesight System - Diagnostic Codes (2 Of 2) & Symptom Tests >> Eyesight System >> DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication With ECM/PCM "A"; DTC U0101: Lost Communication With TCM; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0146: Lost Communication With Serial Data Gateway Module "A"; DTC U0402: Invalid Data Received From TCM; DTC U1077: Control Module Communication Bus "EyeSight Local - Bus3" Off; DTC U1235: Lost Communication With EyeSight; DTC U1433: Invalid Data Received From EyeSight; DTC U1C00: Invalid Authentication Data Received From Gateway; DTC U1C07: Invalid Authentication Data Received From ECM/PCM PU-Bus; DTC U1C08: Invalid Authentication Data Received From VDC PU-Bus [12/2023 - ] >> Description
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DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication With ECM/PCM "A"; DTC U0101: Lost Communication With TCM; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0146: Lost Communication With Serial Data Gateway Module "A"; DTC U0402: Invalid Data Received From TCM; DTC U1077: Control Module Communication Bus "EyeSight Local - Bus3" Off; DTC U1235: Lost Communication With EyeSight; DTC U1433: Invalid Data Received From EyeSight; DTC U1C00: Invalid Authentication Data Received From Gateway; DTC U1C07: Invalid Authentication Data Received From ECM/PCM PU-Bus; DTC U1C08: Invalid Authentication Data Received From VDC PU-Bus [12/2023 - ]: Description

DTC No. Detection Item DTC Detection Condition
U0073 Control Module Communication Bus Off Detected when malfunction occurs in CAN line. (Bus off)
U0100 Lost Communication With ECM/PCM "A" Detected when CAN data from ECM is not transmitted to No. 2 Network Gateway ECU.
U0101 Lost Communication With TCM
  • Detected when CAN data from transmission control ECU assembly is not transmitted to No. 2 Network Gateway ECU.
  • Detected when a No. 2 network gateway ECU with [Transmission Type] judged as [AT/CVT] is installed to a vehicle that is not equipped with a transmission control ECU assembly (MT model).
U0122 Lost Communication With Vehicle Dynamics Control Module Detected when CAN data from brake actuator assembly is not transmitted to No. 2 Network Gateway ECU.
U0146 Lost Communication With Serial Data Gateway Module "A" Detected when CAN data from the network gateway ECU is not transmitted to No. 2 Network Gateway ECU.
U0402 Invalid Data Received From TCM Failure counter diagnosis of transmission control ECU assembly.
U1077 Control Module Communication Bus "EyeSight Local - Bus3" Off Detected when malfunction occurs in CAN line. (Bus off)
U1235 Lost Communication With EyeSight Detected when CAN data from forward recognition camera is not transmitted to No. 2 Network Gateway ECU.
U1433 Invalid Data Received From EyeSight Failure counter diagnosis of forward recognition camera.
U1C00 Invalid Authentication Data Received From Gateway Detected when authentication communication with network gateway ECU failed.
U1C07 Invalid Authentication Data Received From ECM/PCM PU-Bus Detected when authentication communication with ECM failed.
U1C08 Invalid Authentication Data Received From VDC PU-Bus Detected when authentication communication with brake actuator assembly failed.
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