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Home >> Toyota >> 2017 >> Camry LE >> Repair and Diagnosis (Single Page) >> Restraints >> Seat Belts >> Pre-Collision System (Diagnostic Codes (C1A01-U0235) & Circuit Tests) (Except Hybrid) >> Pre-Collision 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 U0142: Lost Communication with Body Control Module "B"; DTC U1104: Lost Communication with Driving Support ECU [08/2015 - ] >> 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 U0142: Lost Communication with Body Control Module "B"; DTC U1104: Lost Communication with Driving Support ECU [08/2015 - ]: Description

The driving support ECU assembly uses the millimeter wave radar sensor assembly to detect obstacles in front of the vehicle.

Based on this information, the driving support ECU assembly sends pre-collision control operation signals. These DTCs are stored when a communication malfunction occurs between the sensors and ECUs that detect crashes, or between ECUs that perform the pre-collision control.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0125 Lost Communication with Yaw Rate Sensor Module When the engine switch is on (IG), a communication error between the airbag sensor assembly (yaw rate sensor) and the driving support ECU assembly is detected for approximately 0.772 seconds.
  • CAN communication system
  • Airbag sensor assembly (yaw rate sensor)
  • Driving support ECU assembly
U0126 Lost Communication with Steering Angle Sensor Module When the engine switch is on (IG), a communication error between the spiral cable with sensor sub-assembly (steering angle sensor) and the driving support ECU assembly is detected for approximately 3.760 seconds.
  • CAN communication system
  • Spiral cable with sensor sub-assembly (steering angle sensor)
  • Driving support ECU assembly
U0129 Lost Communication with Brake System Control Module When the engine switch is on (IG), a communication error between the skid control ECU (brake actuator assembly) and the driving support ECU assembly is detected for approximately 5.24 seconds.
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • Driving support ECU assembly
U0142 Lost Communication with Body Control Module "B" When the engine switch is on (IG), a communication error between the main body ECU (multiplex network body ECU) and driving support ECU assembly is detected for approximately 14.2 seconds.
  • CAN communication system
  • Main body ECU (multiplex network body ECU)
  • Driving support ECU assembly
U1104 Lost Communication with Driving Support ECU When the engine switch is on (IG), a communication error between the skid control ECU (brake actuator assembly) and the driving support ECU assembly is detected for approximately 1.6 second.
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • Driving support ECU assembly
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