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Home >> Toyota >> 2017 >> Mirai >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System - Diagnostic Codes & Symptom Tests >> Meter / Gauge System >> DTC U0100: Lost Communication with EV ECU; DTC U0129: Lost Communication with Brake System Control Module; DTC U0131: Lost Communication with Power Steering Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0151: Lost Communication with Restraints Control Module; DTC U0182: Lost Communication with Lighting Control Module Front; DTC U023A: Lost Communication with Front Camera Module; DTC U1104: Lost Communication with Driving Support ECU [06/2015 - 11/2018] >> Description
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DTC U0100: Lost Communication with EV ECU; DTC U0129: Lost Communication with Brake System Control Module; DTC U0131: Lost Communication with Power Steering Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0151: Lost Communication with Restraints Control Module; DTC U0182: Lost Communication with Lighting Control Module Front; DTC U023A: Lost Communication with Front Camera Module; DTC U1104: Lost Communication with Driving Support ECU [06/2015 - 11/2018]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area
U0100 Lost Communication with EV ECU Both conditions are met:
  • IG voltage is 9.5 V or higher.
  • No communication with the ECM or hybrid vehicle control ECU continues for 2 seconds or more.
  • ECM
  • Hybrid vehicle control ECU
  • CAN communication system
  • Combination meter assembly
U0129 Lost Communication with Brake System Control Module Both conditions are met:
  • IG voltage is 9.5 V or higher.
  • No communication with the brake booster with master cylinder assembly (skid control ECU) continues for 3 seconds or more.
  • Brake booster with master cylinder assembly (skid control ECU)
  • CAN communication system
  • Combination meter assembly
U0131 Lost Communication with Power Steering Control Module Both conditions are met:
  • IG voltage is 9.5 V or higher.
  • No communication with the power steering ECU assembly continues for 3 seconds or more.
  • Power steering ECU assembly
  • CAN communication system
  • Combination meter assembly
U0142 Lost Communication with Body Control Module "B" Both conditions are met:
  • IG voltage is 9.5 V or higher.
  • No communication with the main body ECU (multiplex network body ECU) continues for 3 seconds or more.
  • Main body ECU (multiplex network body ECU)
  • CAN communication system
  • Combination meter assembly
U0151 Lost Communication with Restraints Control Module Both conditions are met:
  • IG voltage is 9.5 V or higher.
  • No communication with the airbag ECU assembly continues for 10 seconds or more.
  • Airbag ECU assembly
  • CAN communication system
  • Combination meter assembly
U0182 Lost Communication with Lighting Control Module Front Both conditions are met:
  • IG voltage is 9.5 V or higher.
  • No communication with the headlight light control ECU sub-assembly continues for 10 seconds or more.
  • Headlight light control ECU sub-assembly
  • CAN communication system
  • Combination meter assembly
U023A Lost Communication with Front Camera Module Both conditions are met:
  • IG voltage is 9.5 V or higher.
  • No communication with the lane departure warning camera continues for 10 seconds or more.
  • Lane departure warning camera
  • CAN communication system
  • Combination meter assembly
U1104 Lost Communication with Driving Support ECU Both conditions are met:
  • IG voltage is 9.5 V or higher.
  • No communication with the driving support ECU assembly continues for 10 seconds or more.
  • Driving support ECU assembly
  • CAN communication system
  • Combination meter assembly
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