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Home >> Lexus >> 2020 >> RC 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Electrical >> Gauges >> Meter / Gauge System - Diagnostic Codes & Symptom Tests (1 Of 2) >> Meter / Gauge System >> DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0130: Lost Communication with VGRS; DTC U0131: Lost Communication with Power Steering Control Module; 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 [09/2014 - 11/2017] >> Description
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DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0130: Lost Communication with VGRS; DTC U0131: Lost Communication with Power Steering Control Module; 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 [09/2014 - 11/2017]: Description

The combination meter assembly communicates with the ECM, brake actuator assembly (skid control ECU), front steering control ECU*1, power steering ECU assembly, rear steering control ECU*2, main body ECU (multiplex network body ECU), airbag sensor assembly, radio receiver assembly, headlight leveling ECU assembly*3, headlight control ECU sub-assembly LH*4, lane departure warning camera*5 and driving support ECU assembly*6 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 -
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 brake actuator assembly (skid control ECU) continues for 3 seconds or more
  • Brake actuator assembly (skid control ECU)
  • 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 w/ Variable Gear Ratio Steering System
U0131 Lost Communication with Power Steering Control Module 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 rear steering control ECU continues for 3 seconds or more
  • Rear steering control ECU
  • CAN communication system
  • Combination meter assembly
 DTC stored w/ Dynamic Rear Steering System
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 10 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 sensor assembly continues for 10 seconds or more
  • Airbag sensor 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 headlight leveling ECU assembly*3 or headlight control ECU sub-assembly LH*4 continues for 10 seconds or more
  • Headlight leveling ECU assembly*3
  • Headlight control ECU sub-assembly LH*4
  • 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 lane departure warning camera continues for 10 seconds or more
  • Lane departure warning camera
  • CAN communication system
  • Combination meter assembly
 DTC stored w/ Lane Departure Alert System
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 driving support ECU assembly continues for 10 seconds or more
  • Driving support ECU assembly
  • CAN communication system
  • Combination meter assembly
 DTC stored w/ Pre-collision System
  1. *1: w/ Variable Gear Ratio Steering System
  2. *2: w/ Dynamic Rear Steering System
  3. *3: for Single Beam Headlight
  4. *4: for Triple Beam Headlight
  5. *5: w/ Lane Departure Alert System
  6. *6: w/ Pre-collision System
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