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Home >> Toyota >> 2019 >> Prius Prime Advanced >> 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 [09/2016 - 07/2020] >> 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 [09/2016 - 07/2020]: 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 0.8 seconds or more.
  • CAN communication system
  • Airbag sensor assembly (Yaw rate and acceleration sensor)
  • Driving support ECU assembly
  • Network gateway ECU
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 0.8 seconds or more.
  • CAN communication system
  • Steering sensor
  • Driving support ECU assembly
  • Network gateway ECU
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 (brake booster with master cylinder assembly) and the driving support ECU assembly is detected for approximately 2.3 seconds or more.
  • CAN communication system
  • Skid control ECU (brake booster with master cylinder assembly)
  • Driving support ECU assembly
  • Network gateway ECU
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 and the driving support ECU assembly is detected for approximately 0.8 seconds or more.
  • CAN communication system
  • Hybrid vehicle control ECU
  • Driving support ECU assembly
  • Network gateway ECU
Does not come on