ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:U0073, U0110, U0120, U0123, U0124, U0126, U0128, U0130, U0134, U0151, U0293

DTC Code DTC Name
U0073 Control Module Communication Bus OFF
U0110 Lost Communication with Drive Motor Control Module "A"
U0120 Lost Communication with Starter / Generator Control Module
U0123 Lost Communication with Yaw Rate Sensor Module
U0124 Lost Communication with Lateral Acceleration Sensor Module
U0126 Lost Communication with Steering Angle Sensor Module
U0128 Lost Communication With EPB Module
U0130 Lost Communication with Steering Effort Control Module
U0134 Lost Communication with DRS Module
U0151 Lost Communication with Airbag ECU
U0293 Lost Communication with Hybrid Vehicle Control System

DESCRIPTION

The skid control ECU assembly receives signals from the hybrid vehicle control ECU assembly, steering sensor, yaw rate sensor, acceleration sensor (yaw rate sensor), VGRS ECU (front steering control ECU), DRS ECU (raer steering control ECU), parking brake ECU assembly, certification ECU (smart key ECU assembly) and airbag ECU assembly via CAN communication.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
U0073 Control Module Communication Bus OFF

400

401

402

403

404

405

406

407

410

411

412

  • INF Code: 400


    • Either of the following is detected:


      1. When terminal IG1 voltage is 10 V or more, data from the yaw rate sensor cannot be received for 1 second or more. (Yaw rate sensor response malfunction)

      2. When terminal IG1 voltage is 10 V or more, the condition in which data from the yaw rate sensor cannot be received once or more within 5 seconds, occurs 10 times in succession.


  • INF Code: 401


    • Either of the following is detected:


      1. When terminal IG1 voltage is 10 V or more, data from the acceleration sensor cannot be received for 1 second or more. (Acceleration sensor response malfunction)

      2. When terminal IG1 voltage is 10 V or more, the condition in which data from the acceleration sensor cannot be received once or more within 5 seconds, occurs 10 times in succession.


  • INF Code: 402


    • Either of the following is detected:


      1. When terminal IG1 voltage is 10 V or more, data from the steering sensor cannot be received for 1 second or more. (Steering sensor response malfunction)

      2. When terminal IG1 voltage is 10 V or more, the condition in which data from the steering sensor cannot be received once or more within 5 seconds, occurs 10 times in succession.


  • INF Code: 403


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


  • INF Code: 404


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


  • INF Code: 405, 406, 407, 410, 411, 412


    • CAN communication line has open or short, and cannot perform communication.

  • INF Code: 400, 401


    • CAN communication line

    • Yaw rate sensor

    • Skid control ECU assembly


  • INF Code: 402


    • CAN communication line

    • Steering sensor

    • Skid control ECU assembly


  • INF Code: 403


    • CAN communication line

    • VGRS ECU (front steering control ECU)

    • Skid control ECU assembly


  • INF Code: 404


    • CAN communication line

    • DRS ECU (rear steering control ECU)

    • Skid control ECU assembly


  • INF Code: 405, 406, 407, 410, 411, 412


    • CAN communication line

    • Skid control ECU assembly

 -
U0110 Lost Communication with Drive Motor Control Module "A"

158

159

  • INF Code: 158


    • The IG2 terminal voltage is 9.5 V or more and data cannot be received from the inverter with converter assembly for 2 seconds


  • INF Code: 159


    • The IG2 terminal voltage is 9.5 V or more and data cannot be received from the inverter with converter assembly once or more within 5 seconds 10 times consecutively

  • CAN communication line

  • Inverter with converter assembly

  • Skid control ECU assembly

 -
U0120 Lost Communication with Starter / Generator Control Module 365 Push start switch data is invalid for 3 seconds or more.

  • CAN communication line

  • Certification ECU (smart key ECU assembly)

  • Skid control ECU assembly

 -
U0123 Lost Communication with Yaw Rate Sensor Module

338

339

  • INF Code: 338


    • When terminal IG1 voltage is 10 V or more, data from the yaw rate sensor cannot be received for 1 second or more.


  • INF Code: 339


    • When terminal IG1 voltage is 10 V or more, the condition in which data from the yaw rate sensor cannot be received once or more within 5 seconds occurs 10 times in succession.

  • CAN communication line

  • Yaw rate sensor

  • Skid control ECU assembly

 -
U0124 Lost Communication with Lateral Acceleration Sensor Module

319

320

  • INF Code: 319


    • When terminal IG1 voltage is 10 V or more, data from the acceleration sensor cannot be received for 1 second or more.


  • INF Code: 320


    • When terminal IG1 voltage is 10 V or more, the condition in which data from the acceleration sensor cannot be received once or more within 5 seconds occurs 10 times in succession.

  • CAN communication line

  • Acceleration sensor (yaw rate sensor)

  • Skid control ECU assembly

 -
U0126 Lost Communication with Steering Angle Sensor Module

350

601

  • INF Code: 350


    • When terminal IG1 voltage is 10 V or more, data from the Steering sensor cannot be received for 1 second or more.


  • INF Code: 601


    • When terminal IG1 voltage is 10 V or more, the condition in which data from the Steering sensor cannot be received once or more within 5 seconds occurs 10 times in succession.

  • CAN communication line

  • Steering sensor

  • Skid control ECU assembly

 -
U0128 Lost Communication With EPB Module 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 line

  • Parking brake ECU assembly

  • Skid control ECU assembly

 EPB: Electric Parking Brake System
U0130 Lost Communication with Steering Effort Control Module

370

371

  • INF Code: 370


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

  • INF Code: 371


    • With the IG1 terminal voltage 10 V or more, data from the VGRS ECU (front steering control ECU) cannot be received once or more within 5 seconds 10 times in succession.

  • CAN communication system

  • VGRS ECU (front steering control ECU)

  • Skid control ECU assembly

 -
U0134 Lost Communication with DRS Module

440

441

  • INF Code: 440


    • With terminal IG1 voltage at 10 V or more, data cannot be received from the DRS ECU (raer steering control ECU) for 1 second.


  • INF Code: 441


    • With the IG1 terminal voltage 10 V or more, data from the DRS ECU (raer steering control ECU) cannot be received once or more within 5 seconds 10 times in succession.

  • CAN communication system

  • DRS ECU (rear steering control ECU)

  • Skid control ECU assembly

 -
U0151 Lost Communication with Airbag ECU 450 The IG2 terminal voltage is 9.5 V or more and data cannot be received from the airbag ECU assembly continuously for 5 seconds

  • CAN communication system

  • Skid control ECU (brake actuator assembly)

  • Airbag ECU assembly

 -
U0293 Lost Communication with Hybrid Vehicle Control System

152

153

  • INF Code: 152


    • When terminal IG2 voltage is 9.5 V or more, data from the hybrid vehicle control ECU assembly cannot be received for 2 seconds or more.


  • INF Code: 153


    • When terminal IG2 voltage is 9.5 V or more, the condition in which data from the hybrid vehicle control ECU assembly cannot be received once or more within 5 seconds occurs 10 times in succession.

  • CAN communication line

  • Hybrid vehicle control ECU assembly

  • Skid control ECU assembly

 -
DTC Detection Conditions: U0073 INF Code: 400
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition IG1 terminal voltage is 10 V or more ○ ○
Malfunction Status Communication with the yaw rate sensor does not occur for 1 second or more ○ -
Communication with the yaw rate sensor does not occur 1 time or more within 5 seconds - ○
Detection Time - 10 times or more continuously
Number of Trips 1 trip 1 trip
DTC Detection Conditions: U0073 INF Code: 401
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition IG1 terminal voltage is 10 V or more ○ ○
Malfunction Status Communication with the acceleration sensor does not occur for 1 second or more ○ -
Communication with the acceleration sensor does not occur 1 time or more within 5 seconds - ○
Detection Time - 10 times or more continuously
Number of Trips 1 trip 1 trip
DTC Detection Conditions: U0073 INF Code: 402
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition IG1 terminal voltage is 10 V or more ○ ○
Malfunction Status Communication with the steering sensor does not occur for 1 second or more ○ -
Communication with the steering sensor does not occur 1 time or more within 5 seconds - ○
Detection Time - 10 times or more continuously
Number of Trips 1 trip 1 trip

PROCEDURE


  1. CHECK DTC


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the power switch off.

    3. Turn the power switch on (IG).

    4. Check if the same DTC is output.


      Chassis > ABS/VSC/TRC > Trouble Codes

      Tech Tips

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

      Click here

      Result
      Result Proceed to
      CAN communication system DTCs are output. A
      DTCs are not output. B

    A

    INSPECT CAN COMMUNICATION SYSTEM Click here

    B

    USE SIMULATION METHOD TO CHECK Click here