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Home >> Lexus >> 2017 >> IS 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Electrical >> Gauges >> Meter / Gauge System - Diagnostic Codes (2 Of 2) & 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 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 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 [10/2016 - 09/2020] >> Description
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DTC U0100: Lost Communication with ECM / PCM "A"; 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 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 [10/2016 - 09/2020]: Description

The combination meter assembly communicates with the ECM, brake actuator assembly (skid control ECU), front steering control ECU, power steering ECU assembly, main body ECU (multiplex network body ECU), airbag sensor assembly, radio receiver assembly, headlight swivel ECU assembly

*1, No. 1 headlight ECU sub-assembly LH

*2, forward recognition camera and driving support ECU assembly via the CAN communication system.

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 -
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 -
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 swivel ECU assembly
  • *1 or No. 1 headlight ECU sub-assembly LH
  • *2 continues for 10 seconds or more
  • Headlight swivel ECU assembly*1
  • No. 1 headlight ECU sub-assembly LH*2
  • 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 driving support ECU assembly continues for 10 seconds or more
  • Driving support ECU assembly
  • CAN communication system
  • Combination meter assembly
 DTC stored -
  1. *1: w/ AFS (Adaptive Front-lighting System)
  2. *2: w/o AFS (Adaptive Front-lighting System)
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