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Home >> Lexus >> 2018 >> LC 500 >> Repair and Diagnosis (Single Page) >> Electrical >> Gauges >> Meter / Gauge System - Diagnostic Codes & Symptom Tests (Coupe) >> Meter / Gauge System >> DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0103: Lost Communication with Gear Shift Module "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0130: Lost Communication with VGRS; DTC U0131: Lost Communication with Electric Power Steering ECU; DTC U0134: Lost Communication with DRS Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0151: Lost Communication with Restraints Control Module; DTC U0163: Lost Communication with Navigation 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 [03/2017 - 05/2023] >> Description
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DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0103: Lost Communication with Gear Shift Module "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0130: Lost Communication with VGRS; DTC U0131: Lost Communication with Electric Power Steering ECU; DTC U0134: Lost Communication with DRS Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0151: Lost Communication with Restraints Control Module; DTC U0163: Lost Communication with Navigation 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 [03/2017 - 05/2023]: Description

The combination meter assembly communicates with the ECM, shift control ECU, skid control ECU assembly, front steering control ECU, power steering ECU assembly, main body ECU (multiplex network body ECU), airbag ECU assembly, radio receiver assembly, No. 1 headlight ECU sub-assembly LH, forward recognition camera and millimeter wave radar sensor assembly via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
U0100 Lost Communication with ECM / PCM "A" When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with ECM continues for 2 seconds or more
  • ECM
  • CAN communication system
  • Combination meter assembly
 DTC stored -
U0103 Lost Communication with Gear Shift Module "A" When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with shift control ECU continues for 5 seconds or more
  • Shift control ECU
  • CAN communication system
  • Combination meter assembly
 DTC stored -
U0129 Lost Communication with Brake System Control Module When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with skid control ECU assembly continues for 3 seconds or more
  • Skid control ECU assembly
  • CAN communication system
  • Combination meter assembly
 DTC stored -
U0130 Lost Communication with VGRS When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with front steering control ECU continues for 3 seconds or more
  • Front steering control ECU
  • CAN communication system
  • Combination meter assembly
 DTC stored -
U0131 Lost Communication with Electric Power Steering ECU When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with power steering ECU assembly continues for 3 seconds or more
  • Power steering ECU assembly
  • CAN communication system
  • Combination meter assembly
 DTC stored -
U0134 Lost Communication with DRS Module When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with DRS ECU (rear steering control ECU) continues for 3 seconds or more
  • DRS ECU (rear steering control ECU)
  • CAN communication system
  • Combination meter assembly
 DTC stored -
U0142 Lost Communication with Body Control Module "B" When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with 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
 DTC stored -
U0151 Lost Communication with Restraints Control Module When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with airbag ECU assembly continues for 10 seconds or more
  • Airbag ECU assembly
  • CAN communication system
  • Combination meter assembly
 DTC stored -
U0163 Lost Communication with Navigation Control Module When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with radio receiver assembly continues for 3 seconds or more
  • Radio receiver assembly
  • CAN communication system
  • Combination meter assembly
 DTC stored -
U0182 Lost Communication with Lighting Control Module Front When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with No. 1 headlight ECU sub-assembly LH continues for 10 seconds or more
  • No. 1 headlight ECU sub-assembly LH
  • CAN communication system
  • Combination meter assembly
 DTC stored -
U023A Lost Communication with Front Camera Module When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with forward recognition camera continues for 10 seconds or more
  • Forward recognition camera
  • CAN communication system
  • Combination meter assembly
 DTC stored -
U1104 Lost Communication with Driving Support ECU When IG voltage is 9.5 V or more and the following condition is detected:
  • No communication with millimeter wave radar sensor assembly continues for 10 seconds or more
  • Millimeter wave radar sensor assembly
  • CAN communication system
  • Combination meter assembly
 DTC stored -
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