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Home >> Toyota >> 2019 >> Corolla XLE >> Repair and Diagnosis (Single Page) >> Steering >> Steering Control Systems >> Lane Departure Alert System (W/ Steering Control) - Diagnostic Codes & Circuit Tests (Model Code: ZRE172) >> LANE DEPARTURE ALERT SYSTEM (W/ Steering Control) >> DTC C1A73: Driving Support ECU Receive Data Malfunction [08/2016 - ] >> Procedure
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DTC C1A73: Driving Support ECU Receive Data Malfunction [08/2016 - ]: Procedure

  1. CHECK FOR DTCs (PRE-COLLISION SYSTEM) 

    HINT: 

    The driving support ECU communicates with other ECUs via CAN communication. Confirm that the CAN communication system is functioning normally before proceeding.

    1. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Body Electrical > Pre-Collision 2 > Trouble Codes 

      Result

      Result Proceed to
      DTC U0100, U0125, U0126, U0129, U0235, U023A, U1002 and U1104 are not output A
      DTC U0100, U0125, U0126, U0129, U0235, U023A, U1002 or U1104 are out put B

    Result:  2

    GO TO PRE-COLLISION SYSTEM:  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ] 

    Result:  1

    See step  2

  2. CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Chassis > LKA/LDA > Clear DTCs 

    2. Perform the following procedure.

      HINT: 

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

      1. Turn the ignition switch to ON and wait 7 seconds or more.
    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Chassis > LKA/LDA > Trouble Codes 

      Result

      Result Proceed to
      DTC C1A73 is not output A
      DTC C1A73 is output B

    Result:  1

    USE SIMULATION METHOD TO CHECK:  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 08/2017]  , HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - ] 

    Result:  2

    See step  3

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

      Refer to REMOVAL [08/2016 - ]

    2. Perform forward recognition camera adjustment.

      Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [08/2016 - ]

      Result

      Proceed to
      NEXT

    Result:  2

    NEXT 

    See step  4

  4. CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Chassis > LKA/LDA > Clear DTCs 

    2. Perform the following procedure.

      HINT: 

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

      1. Turn the ignition switch to ON and wait 7 seconds or more.
    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Chassis > LKA/LDA > Trouble Codes 

      Result

      Result Proceed to
      DTC C1A73 is not output A
      DTC C1A73 is output B

    Result:  1

    END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) 

    Result:  2

    REPLACE DRIVING SUPPORT ECU ASSEMBLY:  COMPONENTS [08/2016 - ]