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Home >> Toyota >> 2019 >> C-HR LE >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Lane Departure Alert System - Diagnostic Codes & Circuit Tests >> LANE DEPARTURE ALERT SYSTEM (w/ Steering Control) >> DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication With Steering Angle Sensor Module; 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 U0155: Lost Communication with Combination Meter; DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor [02/2017 - 08/2020] >> Description
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DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication With Steering Angle Sensor Module; 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 U0155: Lost Communication with Combination Meter; DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor [02/2017 - 08/2020]: Description

These DTCs are output when a communication malfunction occurs between the sensors and ECUs.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0100 Lost Communication with ECM / PCM "A" While the vehicle is being driven at 5 km/h or 3 mph or more, a communication error between the ECM and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • ECM
  • Forward recognition camera
U0123 Lost Communication with Yaw Rate Sensor Module 2 seconds after the ignition switch is turned ON, the vehicle is being driven at 5 km/h (3 mph) or more and a communication error between the yaw rate sensor and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Yaw rate and acceleration sensor (airbag sensor assembly)
  • Forward recognition camera
U0126 Lost Communication With Steering Angle Sensor Module 2 seconds after the ignition switch is turned ON, a communication error between the steering sensor and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Steering sensor
  • Forward recognition camera
U0129 Lost Communication with Brake System Control Module 2 seconds after the ignition switch is turned ON, a communication error between the skid control ECU (brake actuator assembly) and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
  • Forward recognition camera
U0131 Lost Communication with Power Steering Control Module When the vehicle is being driven at a speed of 5 km/h (3 mph) or more 2 seconds after the ignition switch is turned ON, a communication error between the power steering ECU assembly and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Power steering ECU assembly
  • Forward recognition camera
U0142 Lost Communication with Body Control Module "B" 2 seconds after the ignition switch is turned ON, a communication error between the main body ECU (multiplex network body ECU) and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Main body ECU (Multiplex network body ECU)
  • Forward recognition camera
U0155 Lost Communication with Combination Meter 2 seconds after the ignition switch is turned ON, a communication error between the combination meter assembly and the forward recognition camera is detected for approximately 50 seconds or more.
  • CAN communication system
  • Combination meter assembly
  • Forward recognition camera
U0235 Lost Communication with Cruise Control Front Distance Range Sensor When the vehicle is being driven at a speed of 5 km/h (3 mph) or more 2 seconds after the ignition switch is turned ON, a communication error between the millimeter wave radar sensor assembly and the forward recognition camera is detected for approximately 5 seconds.
  • CAN communication system
  • Millimeter wave radar sensor assembly
  • Forward recognition camera
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