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Home >> Lexus >> 2021 >> LC 500 2D Coupe >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Exterior Trim >> Active Rear Wing System - Diagnostic Codes & Symptom Tests (Coupe) >> Active Rear Wing System >> DTC U0101: Lost Communication with ECM; DTC U0129: Lost Communication with Skid Control ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter [03/2017 - ] >> Description

DTC U0101: Lost Communication with ECM; DTC U0129: Lost Communication with Skid Control ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter [03/2017 - ]: Description

These DTCs are stored when a malfunction occurs in the CAN communication system.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0101 Lost Communication with ECM All conditions are met:
  • Engine switch on (IG)
  • ECUB terminal voltage is 10 V or more.
  • No communication with the ECM for 10 seconds or more.
  • CAN communication system
  • ECM
  • Spoiler control ECU assembly
U0129 Lost Communication with Skid Control ECU All conditions are met:
  • Engine switch on (IG)
  • ECUB terminal voltage is 10 V or more.
  • No communication with the skid control ECU assembly for 10 seconds or more.
  • CAN communication system
  • Skid control ECU assembly
  • Spoiler control ECU assembly
U0142 Lost Communication with Main Body ECU All conditions are met:
  • Engine switch on (IG)
  • ECUB terminal voltage is 10 V or more.
  • No communication with the main body ECU (multiplex network body ECU) for 10 seconds or more.
  • CAN communication system
  • Main body ECU (multiplex network body ECU)
  • Spoiler control ECU assembly
U0155 Lost Communication with Combination Meter All conditions are met:
  • Engine switch on (IG)
  • ECUB terminal voltage is 10 V or more.
  • No communication with the combination meter assembly for 10 seconds or more.
  • CAN communication system
  • Combination meter assembly
  • Spoiler control ECU assembly