LKA/LDA SYSTEM, Diagnostic DTC:U1104

DTC Code DTC Name
U1104 Lost Communication with Driving Support ECU

DESCRIPTION

The forward recognition camera communicates with the driving support ECU assembly and millimeter wave radar sensor assembly via CAN communication. If there is a communication error with the driving support ECU assembly, the forward recognition camera stores DTC U1104.

DTC No. Detection Item DTC Detection Condition Trouble Area
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

  • Pre-collision system

CAUTION / NOTICE / HINT

Note


  • When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

  • When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.

  • If the forward recognition camera has been replaced with a new one, be sure to perform Forward Recognition Camera Learning.

    Click here

PROCEDURE


  1. CHECK FOR DTCs (PRE-COLLISION SYSTEM and FRONT CAMERA SYSTEM)


    1. Check for DTCs.

      Tech Tips

      The malfunction area can be determined by the combination of DTCs output at the same time.


      Body Electrical > Pre-Collision 2 > Trouble Codes
      Chassis > Front Recognition Camera > Trouble Codes
      Result
      Result Proceed to
      Front camera system (Front Recognition Camera) DTC U1104 and pre-collision system (Pre-Collision 2) DTC U1002 are output. A
      Front camera system (Front Recognition Camera) DTC U1104 and pre-collision system (Pre-Collision 2) DTC U1104 are output. B
      Front camera system (Front Recognition Camera) DTCs U1104 and U0235 and pre-collision system (Pre-Collision 2) DTC U1104 are output. C
      Front camera system (Front Recognition Camera) DTCs U1104 and U0235 and pre-collision system (Pre-Collision 2) DTC U023A are output.
      Only front camera system (Front Recognition Camera) DTC U1104 is output.

    A

    GO TO PRE-COLLISION SYSTEM Click here

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    C

  2. REPLACE FORWARD RECOGNITION CAMERA


    1. Replace the forward recognition camera.

      Click here

    2. Perform Forward Recognition Camera Learning.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END