ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:U0073/94, U0123/62, U0124/95, U0126/63, U0128/13, U0130/68, U0134/15, U0293/59

DTC Code DTC Name
U0073/94 Control Module Communication Bus OFF
U0123/62 Lost Communication with Yaw Rate Sensor Module
U0124/95 Lost Communication with Lateral Acceleration Sensor Module
U0126/63 Lost Communication with Steering Angle Sensor Module
U0128/13 Lost Communication with Park Brake Control Module
U0130/68 Lost Communication with Steering Effort Control Module
U0134/15 Lost Communication with DRS Module
U0293/59 Communication Error from HV ECU

DESCRIPTION

The skid control ECU assembly receives the signals from the power management control ECU, steering angle sensor, yaw rate sensor, front steering control ECU (VGRS ECU), rear steering control ECU (DRS ECU), and parking brake ECU assembly via the CAN communication system.

DTC Code INF Code DTC Detection Condition Trouble Area
U0073/94

400

401

Either of the following is detected:


  1. With IG1 terminal voltage 10 V or more, communication with yaw rate sensor does not occur for 1 second or more. (Yaw rate sensor response malfunction)

  2. With IG1 terminal voltage 10 V or more, communication with acceleration sensor does not occur for 1 second or more. (Acceleration sensor response malfunction)

  • CAN communication system

  • Yaw rate sensor

  • Skid control ECU assembly
↑ 402 With IG1 terminal voltage 10 V or more, communication with steering angle sensor does not occur for 1 second or more. (Steering angle sensor response malfunction)

  • CAN communication system

  • Steering sensor

  • Skid control ECU assembly
↑ 403 With IG1 terminal voltage 10 V or more, communication with front steering control ECU (VGRS ECU) does not occur for 1 second or more. (Front steering control ECU [VGRS ECU] response malfunction)

  • CAN communication system

  • Front steering control ECU (VGRS ECU)

  • Skid control ECU assembly
↑ 404 With IG1 terminal voltage 10 V or more, communication with rear steering control ECU (DRS ECU) does not occur for 1 second or more. (Rear steering control ECU [DRS ECU] response malfunction)

  • CAN communication system

  • Rear steering control ECU (DRS ECU)

  • Skid control ECU assembly
↑

406

411

 CAN communication line (sub bus 15) has open or short, and cannot perform communication.

  • CAN communication system

  • Skid control ECU assembly
↑

407

412

 CAN communication line (CAN No. 1 bus) has open or short, and cannot perform communication.

  • CAN communication system

  • Skid control ECU assembly
U0123/62 338 With the IG1 terminal voltage 10 V or more, data from the yaw rate sensor cannot be received for 1 second or more.

  • CAN communication system

  • Yaw rate sensor

  • Skid control ECU assembly
↑ 339

With the IG1 terminal voltage 10 V or more, the following occurs 10 times in succession:


  • Data from the yaw rate sensor cannot be received once or more within 5 seconds.

 ↑
U0124/95 319 With the IG1 terminal voltage 10 V or more, data from the acceleration sensor cannot be received for 1 second or more.

  • CAN communication system

  • Acceleration sensor (yaw rate sensor)

  • Skid control ECU assembly
↑ 320

With the IG1 terminal voltage 10 V or more, the following occurs 10 times in succession:


  • Data from the acceleration sensor cannot be received once or more within 5 seconds.

 ↑
U0126/63 350 With the IG1 terminal voltage 10 V or more, data from the steering angle sensor cannot be received for 1 second or more.

  • CAN communication system

  • Steering sensor

  • Skid control ECU assembly
↑ 601

With the IG1 terminal voltage 10 V or more, the following occurs 10 times in succession:


  • Data from the steering angle sensor cannot be received once or more within 5 seconds.

 ↑
U0128/13 425 With terminal IG1 voltage at 10 V or more, data cannot be received from the electric parking brake ECU for 1 second.

  • CAN communication system

  • Parking brake ECU assembly

  • Skid control ECU assembly
U0130/68 370 With terminal IG1 voltage at 10 V or more, data cannot be received from the front steering control ECU (VGRS ECU) for 1 second.

  • CAN communication system

  • Front steering control ECU (VGRS ECU)

  • Skid control ECU assembly
↑ 371 With the IG1 terminal voltage 10 V or more, data from the front steering control ECU (VGRS ECU) cannot be received once or more within 5 seconds 10 times in succession. ↑
U0134/15 440 With terminal IG1 voltage at 10 V or more, data cannot be received from the rear steering control ECU (DRS ECU) for 1 second.

  • CAN communication system

  • Rear steering control ECU (DRS ECU)

  • Skid control ECU assembly
↑ 441 With the IG1 terminal voltage 10 V or more, data from the rear steering control ECU (DRS ECU) cannot be received once or more within 5 seconds 10 times in succession. ↑
U0293/59 152 With the IG2 terminal voltage 9.5 V or more, data from the power management control ECU cannot be received for 2 seconds or more.

  • CAN communication system

  • Power management control ECU

  • Skid control ECU assembly
↑ 153 With the IG2 terminal voltage 9.5 V or more, data from the power management control ECU cannot be received once or more within 5 seconds 10 times in succession. ↑

INSPECTION PROCEDURE

PROCEDURE


  1. RECONFIRM DTC


    1. Turn the power switch off.

    2. Clear the DTCs Click here.

    3. Turn the power switch on (READY).

    4. Drive the vehicle at a speed of 15 km/h (9 mph) or more and turn the steering wheel to the right and left.

    5. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output (for LHD) B
      DTC is output (for RHD) C

      Tech Tips

      If the CAN communication system DTC and the relevant sensor DTCs are output simultaneously, troubleshoot the relevant sensor DTCs (for ABS, VSC and/or electronically controlled brake system) after the CAN communication system returns to normal.


    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    C

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here