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Home >> Lexus >> 2019 >> GS F >> 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 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 [10/2015 - 09/2017] >> Description

DTC U0100: Lost Communication with ECM / PCM "A"; 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 [10/2015 - 09/2017]: 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 1 km/h or 1 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
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 ECM (TCM) and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • TCM
  • Forward recognition camera
U0123 Lost Communication with Yaw Rate Sensor Module 2 seconds after the engine switch is turned on (IG), the vehicle is being driven at 1 km/h or 1 mph or more and a communication error between the yaw rate and acceleration sensor (yaw rate sensor) and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Yaw rate and acceleration sensor (yaw rate sensor)
  • Forward recognition camera
U0126 Lost Communication With Steering Angle Sensor Module 2 seconds after the engine 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 engine switch is turned on (IG), 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 2 seconds after the engine 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 engine 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 engine 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
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