PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:U0122,U0123,U0126,U0140,U0151,U0235,U1002,U1100 and U1104

DTC Code DTC Name
U0122 Lost Communication with Vehicle Dynamics Control Module
U0123 Lost Communication with Yaw Rate Sensor Module
U0126 Lost Communication with Steering Angle Sensor Module
U0140 Lost Communication with Main Body ECU
U0151 Lost Communication with Airbag ECU
U0235 Lost Communication with Cruise Control Front Distance Range Sensor
U1002 Lost Communication with Gateway Module
U1100 Lost Communication with Seat Belt Control ECU
U1104 Lost Communication with Driving Support ECU

DESCRIPTION

These DTCs are stored when a communication malfunction occurs between the sensors and ECUs that detect collisions, or between ECUs that perform pre-crash control.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

U0122

Lost Communication with Vehicle Dynamics Control Module

While the engine switch on (IG), communication stops between the skid control ECU and driving support ECU or seat belt control ECU for 1 second or more.

  • Master cylinder solenoid (Skid control ECU)

  • CAN communication system

  • Seat belt control ECU

  • Driving support ECU

  • Seat Belt Control ECU (Pre-Crash)

  • Driving Support ECU (Pre-Crash 2)

U0123

Lost Communication with Yaw Rate Sensor Module

While the engine switch on (IG), communication stops between the yaw rate sensor and driving support ECU for 1 second or more.

  • Yaw rate sensor

  • CAN communication system

  • Driving support ECU

Driving Support ECU (Pre-Crash 2)

U0126

Lost Communication with Steering Angle Sensor Module

While the engine switch on (IG), communication stops between the steering angle sensor and driving support ECU for 1 second or more.

  • Steering angle sensor

  • CAN communication system

  • Driving support ECU

Driving Support ECU (Pre-Crash 2)

U0140

Lost Communication with Main Body ECU

While the engine switch on (IG), communication stops between the main body ECU and seat belt control ECU for 1 second or more.

  • Main body ECU (Multiplex network body ECU)

  • CAN communication system

  • Seat belt control ECU

Seat Belt Control ECU (Pre-Crash)

U0151

Lost Communication with Airbag ECU

While the engine switch on (IG), communication stops between the center airbag sensor assembly and seat belt control ECU for 1 second or more.

  • Center airbag sensor assembly

  • CAN communication system

  • Seat belt control ECU

Seat Belt Control ECU (Pre-Crash)

U0235

Lost Communication with Cruise Control Front Distance Range Sensor

While the engine switch on (IG), communication stops between the millimeter wave radar sensor assembly and driving support ECU for 1 second or more.

  • Millimeter wave radar sensor assembly

  • CAN communication system

  • Driving support ECU

Driving Support ECU (Pre-Crash 2)

U1002

Lost Communication with Gateway Module

While the engine switch is on (IG), communication stops between the driving support ECU and millimeter wave radar sensor assembly for 1 second or more.

  • Driving support ECU

  • CAN communication system

  • Millimeter wave radar sensor assembly

Driving Support ECU (Pre-Crash 2)

U1100

Lost Communication with Seat Belt Control ECU

While the engine switch on (IG), communication stops between the seat belt control ECU and driving support ECU for 1 second or more.

  • Seat belt control ECU

  • CAN communication system

  • Driving support ECU

Driving Support ECU (Pre-Crash 2)

U1104

Lost Communication with Driving Support ECU

While the engine switch on (IG), communication stops between the seat belt control ECU or millimeter wave radar sensor assembly and driving support ECU for 1 second or more.

  • Millimeter wave radar sensor assembly

  • Seat belt control ECU

  • CAN communication system

  • Driving support ECU

  • Seat Belt Control ECU (Pre-Crash)

  • Driving Support ECU (Pre-Crash 2)

PROCEDURE

  1. CHECK CAN COMMUNICATION SYSTEM

    1. Select "Bus Check" from the "System Select" screen on the intelligent tester.

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

      OK

      CAN communication system DTCs are not output.

      Result

      Result

      OK

      NG
    OK

    USE SIMULATION METHOD TO CHECK

    Click here

    NG

    GO TO CAN COMMUNICATION SYSTEM

    Click here