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Home >> Toyota >> 2021 >> Avalon TRD >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Electronically Controlled Brake System - Diagnostic Codes (P0571-U0074) & Symptom Tests (Except Hybrid) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model) >> DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication With ECM/PCM "A"; DTC U0123: Lost Communication With Yaw Rate Sensor Module; DTC U0126: Lost Communication With Steering Angle Sensor Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0151: Lost Communication With Restraints Control Module [04/2018 - 08/2021] >> Description
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DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication With ECM/PCM "A"; DTC U0123: Lost Communication With Yaw Rate Sensor Module; DTC U0126: Lost Communication With Steering Angle Sensor Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0151: Lost Communication With Restraints Control Module [04/2018 - 08/2021]: Description

The skid control ECU (brake actuator assembly) receives signals from the ECM, steering angle sensor, yaw rate and acceleration sensor (airbag sensor assembly), airbag sensor assembly and main body ECU (multiplex network body ECU) via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0073 Control Module Communication Bus Off The +BS terminal voltage is between 9.6 and a 16.5 V and a bus OFF state occurs for 0.1 seconds or more. CAN communication system
U0100 Lost Communication With ECM/PCM "A" The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals cannot be sent to the ECM for 2 seconds or more.
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • ECM
U0123 Lost Communication With Yaw Rate Sensor Module The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals from the yaw rate and acceleration sensor cannot be received for 1 second or more.
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • Yaw rate and acceleration sensor (airbag sensor assembly)
U0126 Lost Communication With Steering Angle Sensor Module The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals from the steering angle sensor cannot be received for 1 second or more.
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • Steering angle sensor
U0142 Lost Communication with Body Control Module "B" The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, data cannot be received from main body ECU (multiplex network body ECU) continuously for 2 seconds or more.
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • Main body ECU (multiplex network body ECU)
U0151 Lost Communication With Restraints Control Module The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals from the airbag sensor assembly cannot be received for 5 seconds or more.
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • Airbag sensor assembly
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