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DTC C1A72: Communication Error from FCM to Driving Support ECU [10/2015 - ]: Procedure

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  1. CHECK FOR DTCs (PRE-COLLISION SYSTEM) 

    HINT: 

    Confirm that there is no communication error between the forward recognition camera and driving support ECU.

    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
    5. Check for DTCs are output.

      Refer to DTC CHECK / CLEAR [10/2015 - ]

      Result

      Result Proceed to
      DTC U023A is not output A
      DTC U023A is output B

    Result: 

    B 

    GO TO PRE-COLLISION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] 

    Result: 

    A 

    See step  2

  2. CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
    5. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [10/2015 - ]

    6. Perform the following procedure.

      HINT: 

      If the following procedure is not performed, the previously output DTC cannot be detected.

      1. Turn the power switch on (IG) and wait 7 seconds or more.
    7. Check for DTCs.

      Refer to DTC CHECK / CLEAR [10/2015 - ]

      Result

      Result Proceed to
      DTC C1A72 is not output A
      DTC C1A72 is output B

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] 

    Result: 

    B 

    See step  3

  3. REPLACE FORWARD RECOGNITION CAMERA 
    1. Replace the forward recognition camera.

      Refer to REMOVAL [10/2015 - ]

    2. Perform Forward Recognition Camera Learning.

      Refer to ADJUSTMENT [10/2015 - ]

    Result: 

    NEXT 

    See step  4

  4. CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
    5. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [10/2015 - ]

    6. Perform the following procedure.

      HINT: 

      If the following procedure is not performed, the previously output DTC cannot be detected.

      1. Turn the power switch on (IG) and wait 7 seconds or more.
    7. Check for DTCs.

      Refer to DTC CHECK / CLEAR [10/2015 - ]

      Result

      Result Proceed to
      DTC C1A72 is not output A
      DTC C1A72 is output B

    Result: 

    A 

    END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) 

    Result: 

    B 

    REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to  COMPONENTS [10/2015 - ] 

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