LANE DEPARTURE ALERT SYSTEM(w/ Steering Control), Diagnostic DTC:U0100,U0101,U0123,U0126,U0129,U0131,U0142,U0155,U0235 and U1104

DTC Code DTC Name
U0100 Lost Communication with ECM / PCM "A"
U0101 Lost Communication With TCM
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
U0235 Lost Communication with Cruise Control Front Distance Range Sensor
U1104 Lost Communication with Driving Support ECU

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0100

Lost Communication with ECM / PCM "A"

While the vehicle is being driven at 1 km/h or 1 mph or more, a communication error between the ECM and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • ECM

  • Forward recognition camera

U0101

Lost Communication With TCM

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

  • CAN communication system

  • ECM (TCM)

  • Forward recognition camera

U0123

Lost Communication with Yaw Rate Sensor Module

2 seconds after the ignition switch is turned ON, the vehicle is being driven at 1 km/h or 1 mph or more and a communication error between the yaw rate sensor and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Yaw rate and acceleration sensor (airbag sensor assembly)

  • Forward recognition camera

U0126

Lost Communication With Steering Angle Sensor Module

2 seconds after the engine switch is turned on (IG), a communication error between the steering angle sensor and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Steering angle sensor (spiral with sensor cable sub-assembly)

  • Forward recognition camera

U0129

Lost Communication with Brake System Control Module

2 seconds after the ignition switch is turned ON, a communication error between the skid control ECU (brake actuator assembly) and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Skid control ECU (brake actuator assembly)

  • Forward recognition camera

U0131

Lost Communication with Power Steering Control Module

2 seconds after the engine switch is turned on (IG), a communication error between the power steering ECU assembly and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Power steering ECU assembly

  • Forward recognition camera

U0142

Lost Communication with Body Control Module "B"

2 seconds after the engine switch is turned 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

Lost Communication with Combination Meter

2 seconds after the engine switch is turned 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

U0235

Lost Communication with Cruise Control Front Distance Range Sensor

2 seconds after the engine switch is turned on (IG), a communication error between the millimeter wave radar sensor assembly and the forward recognition camera is detected for approximately 5 seconds.

  • CAN communication system

  • Millimeter wave radar sensor assembly

  • Forward recognition camera

U1104

Lost Communication with Driving Support ECU

2 seconds after the engine switch is turned on (IG), a communication error between the driving support ECU assembly and the forward recognition camera is detected for approximately 5 seconds.

  • CAN communication system

  • Driving support ECU assembly

  • Forward recognition camera

PROCEDURE

  1. CHECK FOR DTCs

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Clear the DTCs.

      Click here

      Chassis > LKA/LDA > Clear DTCs

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

      Tip:

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

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

    8. Check the DTCs.

      Click here

      Chassis > LKA/LDA > Trouble Codes

    Result

    Result

    Proceed to

    DTC U0100, U0101, U0123, U0126, U0129, U0131, U0142, U0155, U0235 and U1104 are not output

    A

    DTC U0100, U0101, U0123, U0126, U0129, U0131, U0142, U0155, U0235 or U1104 is output

    B
    A

    USE SIMULATION METHOD TO CHECK

    Click hereClick here

    B

    GO TO CAN COMMUNICATION SYSTEM

    for LHD with Central Gateway ECU:Click here

    for RHD with Central Gateway ECU:Click here