LANE DEPARTURE ALERT SYSTEM, Diagnostic DTC:U0101,U0123,U0129,U0142 and U0155

DTC Code DTC Name
U0101 Lost Communication with ECM
U0123 Lost Communication with Yaw Rate Sensor Module
U0129 Lost Communication with Brake System Control Module
U0142 Lost Communication with Body Control Module "B"
U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module (Combination Meter)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0101

Lost Communication with ECM

While the vehicle is being driven at 1 km/h (1 mph) or more, a communication between the ECM and lane departure warning camera stops for 5 seconds or more.

CAN communication system

U0123

Lost Communication with Yaw Rate Sensor Module

While the vehicle is being driven at 1 km/h (1 mph) or more, a communication between the airbag sensor assembly and lane departure warning camera stops for 5 seconds or more.

CAN communication system

U0129

Lost Communication with Brake System Control Module

While the ignition switch ON, a communication between the skid control ECU and lane departure warning camera stops for 5 seconds or more.

CAN communication system

U0142

Lost Communication with Body Control Module "B"

While the ignition switch ON, a communication between the main body ECU (multiplex network body ECU) and lane departure warning camera stops for 5 seconds or more.

CAN communication system

U0155

Lost Communication with Instrument Panel Cluster (IPC) Control Module (Combination Meter)

While the ignition switch ON, a communication between the combination meter assembly and lane departure warning camera stops for 50 seconds or more.

CAN communication system

PROCEDURE

  1. CLEAR DTC

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Enter the following menus: Chassis / Lane Departure Alert / Trouble Codes / Clear DTCs.

    4. Clear the DTCs.

      Chassis > Lane Departure Alert > Clear DTCs

    Result

    Proceed to

    NEXT
    NEXT

  2. CHECK FOR DTC

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Enter the following menus: Chassis / Lane Departure Alert / Trouble Codes.

    4. Check for DTCs.

      Chassis > Lane Departure Alert > Trouble Codes

    Result

    Proceed to

    No DTCs are output

    DTC U0101, U0123, U0129 or U0142 is output
    No DTCs are output

    USE SIMULATION METHOD TO CHECK

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    DTC U0101, U0123, U0129 or U0142 is output

    GO TO CAN COMMUNICATION SYSTEM

    Click here