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Home >> Lexus >> 2018 >> LC 500h >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Forward Recognition Camera System - Diagnostic Codes & Circuit Tests >> Forward Recognition Camera System >> DTC U0101: Lost Communication with TCM; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0134: Lost Communication with DRS Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0293: Lost Communication with HV ECU [01/2017 - 05/2023] >> Description
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DTC U0101: Lost Communication with TCM; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0134: Lost Communication with DRS Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0293: Lost Communication with HV ECU [01/2017 - 05/2023]: Description

When a malfunction is detected between various ECUs and sensors, these DTCs are stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0101 Lost Communication with TCM While the vehicle is being driven at 1 km/h or 1 mph or more, a communication error between the hybrid vehicle control ECU assembly and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Hybrid vehicle control ECU assembly
  • Forward recognition camera
U0123 Lost Communication with Yaw Rate Sensor Module While the vehicle is being driven at 1 km/h or 1 mph or more, 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 sensor
  • Forward recognition camera
U0129 Lost Communication with Brake System Control Module 2 seconds after the power switch is turned on (IG), a communication error between the skid control ECU assembly and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Skid control ECU assembly
  • Forward recognition camera
U0134 Lost Communication with DRS Module 2 seconds after the power switch is turned on (IG), a communication error between the DRS ECU (rear steering control ECU) and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • DRS ECU (rear steering control ECU)
  • Forward recognition camera
U0142 Lost Communication with Body Control Module "B" 2 seconds after the power switch is turned on (IG), 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
U0293 Lost Communication with HV ECU 2 seconds after the power switch is turned on (IG), a communication error between the hybrid vehicle control ECU assembly and the forward recognition camera is detected for approximately 5 seconds.
  • CAN communication system
  • Hybrid vehicle control ECU assembly
  • Forward recognition camera
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