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PRE-COLLISION SYSTEM(for Mono Camera Type), Diagnostic DTC:U0125, U0126, U0129, U0155, U0293

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DTC Code DTC Name
U0125 Lost Communication with Yaw Rate Sensor Module
U0126 Lost Communication with Steering Angle Sensor Module
U0129 Lost Communication with Brake System Control Module
U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module
U0293 Lost Communication with HV ECU
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DESCRIPTION

The driving support ECU assembly uses the millimeter wave radar sensor assembly to detect objects in front of the vehicle. Based on signals from the millimeter wave radar sensor assembly, the driving support ECU assembly sends pre-collision system control operation signals. These DTCs are stored when a communication malfunction occurs between ECUs that perform pre-collision system control.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0125 Lost Communication with Yaw Rate Sensor Module When the power switch is on (IG), a communication error between the yaw rate sensor and the driving support ECU is detected for approximately 1 second or more.

  • CAN communication system

  • Yaw rate sensor

  • Driving support ECU assembly
U0126 Lost Communication with Steering Angle Sensor Module When the power switch is on (IG), a communication error between the steering sensor and the driving support ECU assembly is detected for approximately 4 seconds or more.

  • CAN communication system

  • Steering sensor

  • Driving support ECU assembly
U0129 Lost Communication with Brake System Control Module When the power switch is on (IG), a communication error between the skid control ECU assembly and the driving support ECU assembly is detected for approximately 3 seconds or more.

  • CAN communication system

  • Skid control ECU assembly

  • Driving support ECU assembly
U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module When the power switch is on (IG), a communication error between the combination meter assembly and the driving support ECU assembly is detected for approximately 3 seconds or more.

  • CAN communication system

  • Combination meter assembly

  • Driving support ECU assembly
U0293 Lost Communication with HV ECU When the vehicle is being driven at a speed of 5 km/h (4 mph) or more, a communication error between the hybrid vehicle control ECU assembly and the driving support ECU assembly is detected for approximately 5 seconds or more.

  • CAN communication system

  • Hybrid vehicle control ECU assembly

  • Driving support ECU assembly
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PROCEDURE


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    CHECK FOR DTCs (PRE-COLLISION SYSTEM)


    1. Clear the DTCs.

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      1. Body Electrical > Pre-Collision 2 > Clear DTCs


    2. Make sure that the DTC detection conditions are met.

      Tip:

      If the detection conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs.

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      1. Body Electrical > Pre-Collision 2 > Trouble Codes


      Result
      Result Proceed to
      DTC U0125, U0126, U0129, U0155 and U0293 are not output A
      DTC U0125, U0126, U0129, U0155 or U0293 is output B