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Home >> Toyota >> 2019 >> Mirai >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - Diagnostic Codes & Circuit Tests >> Can Communication System >> DTC U0104: Lost Communication with Driving Support ECU [06/2015 - 11/2018] >> Description

DTC U0104: Lost Communication with Driving Support ECU [06/2015 - 11/2018]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Note
U0104 Lost Communication with Driving Support ECU No communication from the driving support ECU assembly continues.
  • Driving support ECU assembly branch line or connector
  • Power source circuit of driving support ECU assembly
  • Driving support ECU assembly ground circuit
  • Driving support ECU assembly
HINT: 
The network gateway ECU stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 2.

HINT: 

This diagnosis procedure is for when DTC U0104 is output by the network gateway ECU (Techstream display: Gateway).