LANE DEPARTURE ALERT SYSTEM, Diagnostic DTC:C1AA8

DTC Code DTC Name
C1AA8 Front Camera Module Incorrect Axial Gap

DESCRIPTION

If it is determined that the optical axis of the pre-collision city sensor has deviated, DTC C1AA8 is output.

DTC No.

DTC Detection Condition

Trouble Area

C1AA8

The beam axis of the monocular camera sensor or any of the laser sensors built into the pre-collision city sensor has deviated.

  • Pre-collision city sensor

  • Windshield glass

  • Wheel alignment

CAUTION / NOTICE / HINT

Note:

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

  • If the pre-collision city sensor has been replaced, or the windshield glass has been replaced or removed/installed, be sure to perform Pre-collision City Sensor Learning (Click here).

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

  • Pre-collision city sensor optical axis may deviate if the vehicle is driven on a banked road, such as a racetrack. This deviation can be corrected by driving the vehicle on a normal road for a while.

  • Pre-collision city sensor optical axis may deviate when the vehicle is overloaded or the wheel alignment (toe-in) is incorrect. The pre-collision city sensor optical axis can be corrected by decreasing the load on the vehicle or adjusting the toe-in.

PROCEDURE

  1. CHECK VEHICLE OPERATING CONDITION

    1. Check the operating conditions of the vehicle.

    Table 1. Result

    Result

    Proceed to

    Vehicle is not overloaded or being towed.

    A

    Vehicle is overloaded or being towed.

    B

    PERFORM PRE-COLLISION CITY SENSOR LEARNINGClick here

  2. CHECK WHEEL ALIGNMENT

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

      Table 2. Result

      Result

      Proceed to

      Front or rear wheel is misaligned (toe)

      A

      Front and rear wheels are not misaligned (toe)

      B

    CHECK PRE-COLLISION CITY SENSOR INSTALLATIONClick here

  3. ADJUST WHEEL ALIGNMENT

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

  4. PERFORM PRE-COLLISION CITY SENSOR LEARNING

    1. Perform Pre-collision City Sensor Learning (Click here).

  5. CHECK FOR DTCs

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / PCS/LDA/RSA/LVN / Trouble Codes.

    5. Clear the DTCs (Click here).

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

      Tip:

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

    7. Check for DTCs (Click here).

    Table 3. Result

    Result

    Proceed to

    DTC C1AA8 is not output

    A

    DTC C1AA8 is output

    B

    END

    REPLACE PRE-COLLISION CITY SENSOR

    (Click hereClick here)

  6. CHECK PRE-COLLISION CITY SENSOR INSTALLATION

    1. Check the installation condition of the pre-collision city sensor (Click hereClick here).

      Tip:

      If there is a malfunction with the installation condition of the pre-collision city sensor, replace the windshield glass (Click hereClick here).

      OK

      No deformation or deviation in pre-collision city sensor installation bracket.

    PERFORM PRE-COLLISION CITY SENSOR LEARNINGClick here

  7. REPLACE WINDSHIELD GLASS

    1. Replace the windshield glass (Click hereClick here).

    PERFORM PRE-COLLISION CITY SENSOR LEARNINGClick here

  8. PERFORM PRE-COLLISION CITY SENSOR LEARNING

    1. Return the vehicle to normal operating conditions.

    2. Perform Pre-collision City Sensor Learning (Click here).

  9. CHECK FOR DTCs

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / PCS/LDA/RSA/LVN / Trouble Codes.

    5. Clear the DTCs (Click here).

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

      Tip:

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

    7. Check for DTCs (Click here).

    Table 4. Result

    Result

    Proceed to

    DTC C1AA8 is not output

    A

    DTC C1AA8 is output

    B

    END

    CHECK WHEEL ALIGNMENTClick here