PRE-COLLISION SYSTEM, Diagnostic DTC:C1AA8, C1AA9

DTC Code DTC Name
C1AA8 Front Camera Module Incorrect Axial Gap
C1AA9 Front Camera Module Beam Axis Not Adjusted

DESCRIPTION

If the millimeter wave radar sensor assembly detects that the forward recognition camera beam has an axis misalignment, DTC C1AA8 is output.

Also if Forward Recognition Axis Adjustment has not been performed or did not complete normally after the forward recognition camera was replaced with a new one, DTC C1AA9 is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AA8 Front Camera Module Incorrect Axial Gap When the pre-collision system is operating, the millimeter wave radar sensor assembly continuously receives a signal indicating that the beam axis of the forward recognition camera is misaligned for 0.3 seconds or more.

  • Forward recognition camera system

  • Millimeter wave radar sensor assembly
C1AA9 Front Camera Module Beam Axis Not Adjusted When the pre-collision system is operating, the millimeter wave radar sensor assembly detects that Forward Recognition Axis Adjustment has not been completed for 0.3 seconds or more.

  • Forward recognition camera system

  • Millimeter wave radar sensor assembly

CAUTION / NOTICE / HINT

Note


  • When replacing the millimeter wave radar sensor assembly, always replace it with a new one.

  • When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.

    Click here

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

    Click here

  • The pre-collision system uses the CAN communication system. First, confirm that there are no malfunction in the CAN communication system. Refer to How to Proceed with Troubleshooting.

    Click here

PROCEDURE


  1. CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)

    Tech Tips

    Pre-collision system DTC C1AA8 and/or C1AA9 may be stored due to a malfunction in the forward recognition camera system. Therefore, it is necessary to check for and troubleshoot forward recognition camera system DTCs first.


    1. Check for DTCs.

      Click here


      Chassis > Front Recognition Camera > Trouble Codes
      Result
      Result Proceed to
      Forward recognition camera system DTCs are not output A
      Forward recognition camera system DTCs are output B

    B

    GO TO FORWARD RECOGNITION CAMERA SYSTEM Click here

    A

  2. CHECK FOR DTCs (PRE-COLLISION SYSTEM)


    1. Clear the DTCs.

      Click here


      Body Electrical > Pre-Collision 2 > Clear DTCs

    2. Make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs.

      Click here


      Body Electrical > Pre-Collision 2 > Trouble Codes
      Result
      Result Proceed to
      DTC C1AA8 and/or C1AA9 is not output A
      DTC C1AA8 and/or C1AA9 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  3. REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY


    1. Replace the millimeter wave radar sensor assembly.

      Click here

    2. Adjust the millimeter wave radar sensor assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK FOR DTCs (PRE-COLLISION SYSTEM)


    1. Clear the DTCs.

      Click here


      Body Electrical > Pre-Collision 2 > Clear DTCs

    2. Make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs.

      Click here


      Body Electrical > Pre-Collision 2 > Trouble Codes
      Result
      Result Proceed to
      DTC C1AA8 and/or C1AA9 is not output A
      DTC C1AA8 and/or C1AA9 is output B

    A

    END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE)

    B

    REPLACE FORWARD RECOGNITION CAMERA Click here