LANE DEPARTURE ALERT SYSTEM(w/ Steering Control), Diagnostic DTC:U0123, U0126, U0129, U0131, U0142, U0155, U0293

DTC Code DTC Name
U0123 Lost Communication with Yaw Rate Sensor Module
U0126 Lost Communication with Steering Angle Sensor Module
U0129 Lost Communication with Brake System Control Module
U0131 Lost Communication with Power Steering Control Module
U0142 Lost Communication with Body Control Module "B"
U0155 Lost Communication with Combination Meter
U0293 Lost Communication with Hybrid Vehicle Control System

DESCRIPTION

These DTCs are output when a communication malfunction occurs between the sensors and ECUs.

DTC No. DTC Detection Condition Trouble Area
U0123 While the vehicle is being driven at 1 km/h (1 mph) or more, a communication error between the yaw rate sensor and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Airbag sensor assembly (yaw rate sensor)

  • Forward recognition camera
U0126 While the vehicle is being driven at 1 km/h (1 mph) or more, a communication error between the steering sensor and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Steering sensor

  • Forward recognition camera
U0129 While the power switch is on (IG), a communication error between the skid control ECU and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Brake booster with master cylinder assembly (skid control ECU)

  • Forward recognition camera
U0131 While the vehicle is being driven at 1 km/h (1 mph) or more, a communication error between the power steering ECU and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Power steering ECU

  • Forward recognition camera
U0142 While the power switch is on (IG), a communication error between the main body ECU (multiplex network body ECU) and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Main body ECU (multiplex network body ECU)

  • Forward recognition camera
U0155 While the power switch is on (IG), a communication error between the combination meter assembly and the forward recognition camera is detected for approximately 50 seconds or more.

  • CAN communication system

  • Combination meter assembly

  • Forward recognition camera
U0293 When the power switch is on (IG), a communication error between the hybrid vehicle control ECU assembly and the forward recognition camera is detected for approximately 10 seconds.

  • CAN communication system

  • Hybrid vehicle control ECU assembly

  • Forward recognition camera

PROCEDURE


  1. READ VALUE USING GTS (CAN BUS CHECK)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: System Select / Can Bus Check.

      Result
      Result Proceed to
      All of the ECUs and sensors that are currently connected to the CAN communication system are displayed. A
      None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed. B

    5. Turn the power switch off.


    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK DTC OUTPUT (LANE DEPARTURE ALERT SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / LKA/LDA / Trouble Codes.

    5. Clear DTCs Click here.

    6. Turn the power switch off.


    NEXT

  3. CHECK CAN COMMUNICATION SYSTEM


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: System Select / Can Bus Check.

    4. Select "Communication Malfunction DTC" from the "CAN Bus Check" screen, and then select "Enter".

      OK
      CAN communication system is normal.

    5. Turn the power switch off.


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    GO TO DTC CHART (CAN COMMUNICATION SYSTEM) Click here