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Home >> Lexus >> 2017 >> IS 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Gauges & Instrument Panels >> 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 U0140: Lost Communication with Body Control Module; 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 [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 U0140: Lost Communication with Body Control Module; 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 [09/2020 - ]: Description

The combination meter assembly communicates with each ECU via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
U0100 Lost Communication with ECM / PCM "A" Diagnosis Condition:
  • The engine switch is on (IG)
  • IG power source voltage is 9.5 V or more

Malfunction Status:
  1. No communication with ECM

Malfunction Time:
  1. 2 seconds or more
  • ECM
  • CAN communication system
  • Combination meter assembly
 DTC stored
U0129 Lost Communication with Brake System Control Module Diagnosis Condition:
  • The engine switch is on (IG)
  • IG power source voltage is 9.5 V or more

Malfunction Status:
  1. No communication with skid control ECU (brake actuator assembly)

Malfunction Time:
  1. 3 seconds or more
  • Skid control ECU (Brake actuator assembly)
  • CAN communication system
  • Combination meter assembly
 DTC stored
U0131 Lost Communication with Power Steering Control Module Diagnosis Condition:
  • The engine switch is on (IG)
  • IG power source voltage is 9.5 V or more

Malfunction Status:
  1. No communication with power steering ECU with motor assembly

Malfunction Time:
  1. 3 seconds or more
  • Power steering ECU assembly
  • CAN communication system
  • Combination meter assembly
 DTC stored
U0140 Lost Communication with Body Control Module Diagnosis Condition:
  • The engine switch is on (IG)
  • IG power source voltage is 9.5 V or more

Malfunction Status:
  1. No communication with main body ECU (multiplex network body ECU)

Malfunction Time:
  1. 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 Diagnosis Condition:
  • The engine switch is on (IG)
  • IG power source voltage is 9.5 V or more

Malfunction Status:
  1. No communication with airbag sensor assembly

Malfunction Time:
  1. 10 seconds or more
  • Airbag sensor assembly
  • CAN communication system
  • Combination meter assembly
 DTC stored
U0182 Lost Communication with Lighting Control Module Front Diagnosis Condition:
  • The engine switch is on (IG)
  • IG power source voltage is 9.5 V or more

Malfunction Status:
  1. No communication with headlight ECU sub-assembly LH

Malfunction Time:
  1. 10 seconds or more
  • Headlight ECU sub-assembly LH
  • CAN communication system
  • Combination meter assembly
 DTC stored
U023A Lost Communication with Front Camera Module Diagnosis Condition:
  • The engine switch is on (IG)
  • IG power source voltage is 9.5 V or more

Malfunction Status:
  1. No communication with forward recognition camera

Malfunction Time:
  1. 10 seconds or more
  • Forward recognition camera
  • CAN communication system
  • Combination meter assembly
 DTC stored
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