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LANE DEPARTURE ALERT SYSTEM(w/ Steering Control), Diagnostic DTC:C1A72

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DTC Code DTC Name
C1A72 Communication Error from FCM to Driving Support ECU
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DESCRIPTION

If a communication error between the driving support ECU assembly and forward recognition camera is detected, DTC C1A72 is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A72 Communication Error from FCM to 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.

  • CAN communication system

  • Forward recognition camera

  • Driving support ECU assembly
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CAUTION / NOTICE / HINT

Note:

  • 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 adjustment.

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  • 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.

  • The lane departure alert system (w/ Steering Control) uses the CAN communication system. First, confirm that there are no malfunction in the CAN communication system. Refer to How to Proceed with Troubleshooting.

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PROCEDURE


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    CHECK FOR DTCs (PRE-COLLISION SYSTEM)

    Tip:

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


    1. Check for DTCs are output.

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      1. Body Electrical > Pre-Collision 2 > Trouble Codes


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

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    CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM (w/ Steering Control))


    1. Clear the DTCs.

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      1. Chassis > LKA/LDA > Clear DTCs


    2. Perform the following procedure.

      Tip:

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


      1. Turn the engine switch on (IG) and wait 7 seconds or more.

    3. Check for DTCs.

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      1. Chassis > LKA/LDA > Trouble Codes


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

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    REPLACE FORWARD RECOGNITION CAMERA


    1. Replace the forward recognition camera.

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    2. Perform forward recognition camera adjustment.

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      Result
      Proceed to
      NEXT

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    CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM (w/ Steering Control))


    1. Clear the DTCs.

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      1. Chassis > LKA/LDA > Clear DTCs


    2. Perform the following procedure.

      Tip:

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


      1. Turn the engine switch on (IG) and wait 7 seconds or more.

    3. Check for DTCs.

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      1. Chassis > LKA/LDA > Trouble Codes


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

    • A

      END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)

    • B

      REPLACE DRIVING SUPPORT ECU ASSEMBLYClick here