ROAD SIGN ASSIST SYSTEM, Diagnostic DTC:U0101,U0123,U0129,U0142,U0155 and U0293

DTC Code DTC Name
U0101 Lost Communication with TCM
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 Combination Meter
U0293 Lost Communication with HV ECU

DESCRIPTION

These DTCs are stored when a communication error occurs between the sensors and ECUs.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0101

Lost Communication with TCM

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

  • CAN communication system

  • TCM (hybrid vehicle control ECU)

  • Forward recognition camera

U0123

Lost Communication with Yaw Rate Sensor Module

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

  • Yaw rate and acceleration sensor (airbag sensor assembly)

  • Forward recognition camera

U0129

Lost Communication with Brake System Control Module

While the ignition switch is ON, a communication error between the skid control ECU and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

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

  • Forward recognition camera

U0142

Lost Communication with Body Control Module "B"

While the ignition switch is ON, 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

While the ignition switch is ON, 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

Lost Communication with HV ECU

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

  • CAN communication system

  • Hybrid vehicle control ECU

  • Forward recognition camera

PROCEDURE

  1. CHECK FOR DTCs (ROAD SIGN ASSIST SYSTEM)

    1. Clear the DTCs.

      Click here

      Body Electrical > Road Sign Assist > Clear DTCs

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

      Tip:

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

    3. Check for DTCs.

      Click here

      Body Electrical > Road Sign Assist > Trouble Codes

    Result

    Result

    Proceed to

    DTC U0101, U0123, U0129, U0142, U0155 and U0293 are not output

    A

    DTC U0101, U0123, U0129, U0142, U0155 or U0293 is output

    B
    A

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    B

    GO TO CAN COMMUNICATION SYSTEM

    for LHD:Click here

    for RHD:Click here