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Home >> Lexus >> 2018 >> RX 450h Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Lane Keep Assist / Lane Departure Assist System (Diagnostic Codes & Circuit Tests) >> LKA/LDA System >> DTC U0101: Lost Communication with TCM; 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 U0293: Lost Communication with HV ECU [10/2015 - 08/2019] >> Description
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DTC U0101: Lost Communication with TCM; 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 U0293: Lost Communication with HV ECU [10/2015 - 08/2019]: 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 TCM (hybrid vehicle control ECU assembly) and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • TCM (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 assembly and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Yaw rate sensor assembly
  • Forward recognition camera
U0126 Lost Communication with Steering Angle Sensor Module 2 seconds after the power switch is turned on (IG), 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 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
U0131 Lost Communication with Power Steering Control Module 2 seconds after the power switch is turned on (IG), 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 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
U0155 Lost Communication with Combination Meter 2 seconds after the power switch is turned on (IG), 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
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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