PRE-CRASH SAFETY 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 it is determined that the beam axis of the pre-crash safety city sensor is deviated, DTC C1AA8 is output. DTC C1AA9 is output when the system determines that camera beam axis learning has not been performed or has not been completed normally after a new pre-crash safety city sensor is installed.

DTC Code DTC Detection Condition Trouble Area
C1AA8 When the system is operating, a misaligned axis in the pre-crash safety city sensor is detected.

  • Pre-crash safety city sensor

  • Windshield glass
C1AA9 When the system is operating, an unadjusted axis in the pre-crash safety city sensor is detected.

  • Pre-crash safety city sensor

  • Windshield glass

CAUTION / NOTICE / HINT

Note


  • When replacing the pre-crash safety city sensor, replace it with a new one. If an ECU which was installed to another vehicle is used, the information stored in the pre-crash safety city sensor will not match the information from the vehicle and, as a result, a DTC may be output.

  • If the pre-crash safety city sensor has been replaced, or the windshield glass has been replaced or removed/installed, be sure to perform Recognition Camera/Target Position Memory and Recognition Camera Axis Adjust.

  • When replacing the windshield glass of a vehicle equipped with a pre-crash safety city sensor, make sure to use a Toyota genuine part. If a non-Toyota genuine part is used, the pre-crash safety city sensor may not be able to be installed due to a missing bracket or the pre-crash safety system may not operate properly due to a difference in the transmissivity or black ceramic border.

  • Perform adjustment using "ONE TIME RECOGNITION" or "SEQUENTIAL RECOGNITION".


PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    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.

      Result
      Result Proceed to
      Current DTC C1AA8 is output A
      Current DTC C1AA9 is output B
      History DTC C1AA8 is output C

    B

    PERFORM PRE-CRASH SAFETY CITY SENSOR BEAM AXIS LEARNING Click here

    C

    CLEAR DTC Click here

    A

  2. CHECK VEHICLE OPERATING CONDITION


    1. Check the operating conditions of the vehicle.

      Result
      Result Proceed to
      Vehicle is overloaded or being towed A
      Vehicle is not overloaded or being towed B

    B

    CHECK WHEEL ALIGNMENT Click here

    A

  3. PERFORM PRE-CRASH SAFETY CITY SENSOR BEAM AXIS LEARNING


    1. Return the vehicle to normal operating conditions.

    2. Perform the "Recognition Camera/Target Position Memory" and "Recognition Camera Axis Adjust" of pre-crash safety city sensor.


      • Perform adjustment using "ONE TIME RECOGNITION" or "SEQUENTIAL RECOGNITION".



    NEXT

    END

  4. CHECK WHEEL ALIGNMENT


    1. Check the front and rear wheel alignment (toe).


      Result
      Result Proceed to
      Front or rear wheel is misaligned (toe) A
      Front and rear wheels are not misaligned (toe) B

    B

    CHECK PRE-CRASH SAFETY CITY SENSOR INSTALLATION Click here

    A

  5. ADJUST WHEEL ALIGNMENT


    1. Adjust the alignment (toe) of the wheels Click here.


    NEXT

    PERFORM PRE-CRASH SAFETY CITY SENSOR BEAM AXIS LEARNING Perform adjustment using "ONE TIME RECOGNITION" or "SEQUENTIAL RECOGNITION". ONE TIME RECOGNITION Click here SEQUENTIAL RECOGNITION Click here

  6. CHECK PRE-CRASH SAFETY CITY SENSOR INSTALLATION


    1. Check the installation condition of the pre-crash safety city sensor Click here.

      Tech Tips

      If there is a malfunction with the installation condition of the pre-crash safety city sensor, replace the windshield glass Click here.

      Result
      Result Proceed to
      Deformation or deviation in pre-crash safety city sensor installation bracket A
      No deformation or deviation in pre-crash safety city sensor installation bracket B

    B

    PERFORM PRE-CRASH SAFETY CITY SENSOR BEAM AXIS LEARNING Click here

    A

  7. REPLACE WINDSHIELD GLASS


    1. Replace the windshield glass Click here.


    NEXT

  8. PERFORM PRE-CRASH SAFETY CITY SENSOR BEAM AXIS LEARNING


    1. Perform the "Recognition Camera/Target Position Memory" and "Recognition Camera Axis Adjust" of pre-crash safety city sensor.


      • Perform adjustment using "ONE TIME RECOGNITION" or "SEQUENTIAL RECOGNITION".



    NEXT

  9. CHECK FOR DTC


    1. Clear the DTCs Click here.

    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.

      Result
      Result Proceed to
      DTC C1AA8 and C1AA9 are not output A
      DTC C1AA8 or C1AA9 is output B

    A

    END

    B

    REPLACE PRE-CRASH SAFETY CITY SENSOR Click here

  10. CLEAR DTC


    1. Check for DTCs related to misalignment of the pre-crash safety city sensor.

      Tech Tips

      If only history DTCs are stored, they may have stored due to a temporarily condition such as overloading of the vehicle, and the system returned to normal when Beam Axis Learning was performed.

    2. Clear the DTCs Click here.


    NEXT

    END