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Home >> Lexus >> 2018 >> LC 500h >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Dynamic Radar Cruise Control System - Diagnostic Codes & Circuit Tests >> Dynamic Radar Cruise Control System >> DTC U0125: 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 U0293: Lost Communication with Hybrid Vehicle Control System; DTC U1104: Lost Communication with Driving Support ECU [01/2017 - 05/2023] >> Description
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DTC U0125: 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 U0293: Lost Communication with Hybrid Vehicle Control System; DTC U1104: Lost Communication with Driving Support ECU [01/2017 - 05/2023]: Description

The driving support ECU assembly communicates with each sensor and ECU via CAN communication.

If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL
U0125 Lost Communication with Yaw Rate Sensor Module While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the yaw rate sensor and the driving support ECU assembly is detected for approximately 1 second or more.
  • CAN communication system
  • Yaw rate sensor
  • Driving support ECU assembly
 Does not come on
U0126 Lost Communication with Steering Angle Sensor Module While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the steering sensor and the driving support ECU assembly is detected for approximately 1 second or more.
  • CAN communication system
  • Steering sensor
  • Driving support ECU assembly
 Does not come on
U0129 Lost Communication with Brake System Control Module While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the skid control ECU assembly and the driving support ECU assembly is detected for approximately 2.5 seconds or more.
  • CAN communication system
  • Skid control ECU assembly
  • Driving support ECU assembly
 Does not come on
U0293 Lost Communication with Hybrid Vehicle Control System While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the hybrid vehicle control ECU assembly assembly and the driving support ECU assembly is detected for approximately 1 second or more.
  • CAN communication system
  • Hybrid vehicle control ECU assembly
  • Driving support ECU assembly
 Does not come on
U1104 Lost Communication with Driving Support ECU While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and the millimeter wave radar sensor assembly is detected for approximately 0.2 seconds or more.
  • CAN communication system
  • Millimeter wave radar sensor assembly
  • Driving support ECU assembly
 Does not come on
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