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PRE-COLLISION SYSTEM(for Stereo Camera Type), Diagnostic DTC:U110487

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DTC Code DTC Name
U110487 Lost Communication with Driving Support ECU Missing Message
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DESCRIPTION

The DTC is stored when a communication malfunction occurs between ECUs that perform pre-collision system control.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
U110487 Lost Communication with Driving Support ECU Missing Message
  • Detection condition:

  • 2 seconds or more elapsed after power switch is on (IG)


  • Malfunction status:

  • A communication malfunction with the object recognition camera is detected


  • Malfunction duration:

  • 5 seconds or more

  • CAN communication system

  • Electronically controlled brake system

  • Driving support ECU assembly

 Driving support ECU assembly (Pre-Collision System)
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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.

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PROCEDURE


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    READ VALUE USING GTS (CAN BUS CHECK)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: System Select / Can Bus Check.

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      1. CAN Bus Check

      Result
      Result Proceed to
      All of the ECUs and sensors that are currently connected to the CAN communication system are displayed A
      None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed B

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    CHECK FOR DTCs (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Check for DTCs.

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      1. Chassis > ABS/VSC/TRAC > Trouble Codes


      Tip:

      Pre-collision system DTC U110487 may be stored due to a malfunction in the electronically controlled brake system. Therefore it is necessary to check for and troubleshoot electronically controlled brake system DTCs first.

      Result
      Result Proceed to
      Electronically controlled brake system DTC are not output A
      Electronically controlled brake system DTC are output B

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    TEST MODE INSPECTION (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

    Tip:

    When entering test mode, the skid control ECU assembly communicates with the driving support ECU assembly to judge whether the vehicle is equipped with the pre-collision system. Therefore, do not exit test mode within 5 seconds of entering test mode.


    1. Procedure to Enter Test Mode (Signal Check)


      1. Turn the power switch on (IG).

      2. Change the shift state to park (P).

      3. Check that the steering wheel is centered.

      4. Turn the power switch off.

      5. Connect the GTS to the DLC3.

      6. Turn the power switch on (IG).

      7. Check that the parking brake is released.

      8. Turn the GTS on.

      9. Switch the skid control ECU assembly to Test Mode (Signal Check) using the GTS.

      10. Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Signal Check.

        Tip:

        Do not exit test mode within 5 seconds of entering test mode. If test mode is exited within 5 seconds of entering test mode, DTC U110487 may be stored. If DTC U110487 is output after exiting test mode, enter test mode again, wait at least 5 seconds, then recheck for DTCs.


        1. Chassis > ABS/VSC/TRAC > Utility
          Tester Display
          Signal Check




    2. Test Mode (Signal Check) Display Check


      1. Check that the ABS warning, brake warning / yellow (minor malfunction) and slip indicator lights come on for several seconds and then blink in the Test Mode pattern.

        Tip:

        If the ABS warning light, brake warning light / yellow (minor malfunction) or slip indicator light remains illuminated or does not illuminate when Test Mode (Signal Check) is entered, a component or wire harness may be malfunctioning.

    3. End of Test Mode (Signal Check)


      1. Turn the power switch off and disconnect the GTS.

      Result
      Proceed to
      NEXT

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    CHECK FOR DTCs (PRE-COLLISION SYSTEM)


    1. Clear the DTCs.

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      1. Body Electrical > Pre-Collision System > 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.

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      1. Body Electrical > Pre-Collision System > Trouble Codes


      Result
      Result Proceed to
      DTC U110487 is not output A
      DTC U110487 is output B

    • A

      END

    • B

      REPLACE DRIVING SUPPORT ECU ASSEMBLYClick here