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Home >> Lexus >> 2018 >> ES 300h >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Lane Departure Alert System (Diagnostic Codes & Circuit Tests) >> LANE DEPARTURE ALERT SYSTEM (w/ Steering Control) >> 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 Hybrid Vehicle Control System [07/2015 - ] >> Description
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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 Hybrid Vehicle Control System [07/2015 - ]: Description

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

DTC No. DTC Detection Condition Trouble Area
U0123 While the vehicle is being driven at 1 km/h (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
  • Airbag sensor assembly (yaw rate sensor)
  • Forward recognition camera
U0126 While the vehicle is being driven at 1 km/h (1 mph) or more, 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 While the power switch is on (IG), a communication error between the skid control ECU and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Brake booster with master cylinder assembly (skid control ECU)
  • Forward recognition camera
U0131 While the vehicle is being driven at 1 km/h (1 mph) or more, a communication error between the power steering ECU and the forward recognition camera is detected for approximately 5 seconds or more.
  • CAN communication system
  • Power steering ECU
  • Forward recognition camera
U0142 While the power switch is 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 While the power switch is 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 When the power switch is on (IG), a communication error between the hybrid vehicle control ECU assembly and the forward recognition camera is detected for approximately 10 seconds.
  • CAN communication system
  • Hybrid vehicle control ECU assembly
  • Forward recognition camera
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