DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:C1A11, C1A14

DTC Code DTC Name
C1A11 Front Radar Sensor Incorrect Axial Gap
C1A14 Front Radar Sensor Beam Axis Not Adjusted

DESCRIPTION

The driving support ECU assembly uses the millimeter wave radar sensor assembly to detect obstacles in front of the vehicle.

When the vehicle is determined to be driving in a straight line or on a gradual curve based on signals from the yaw rate sensor, the millimeter wave radar sensor assembly performs self diagnosis to check if the sensor beam axis has deviated from the vehicle movement direction. When the millimeter wave radar sensor assembly beam axis is not adjusted correctly, the driving support ECU assembly detects this, and DTC C1A11 is stored.

After installing a new millimeter wave radar sensor assembly, if sensor beam axis adjustment is not performed, DTC C1A14 is stored.

DTC No. DTC Detection Condition Trouble Area
C1A11 While power switch is on (IG) and dynamic radar cruise control is operating after driving at approximately 50 km/h (31 mph), driving support ECU assembly determines that aim of front millimeter wave radar sensor beam axis is not adjusted correctly

  • Millimeter wave radar sensor assembly

  • Driving support ECU assembly
C1A14 Driving at 10 km/h (6 mph) or more while dynamic radar cruise control is operating and front millimeter wave radar sensor beam axis adjustment has not been performed

  • Millimeter wave radar sensor assembly

  • Driving support ECU assembly

PROCEDURE


  1. ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY

    Click here


    NEXT

  2. CHECK FOR DTCs (C1A11 OR C1A14)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Clear the DTCs Click here.

    4. Perform the following to make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the malfunction cannot be detected.


      1. Drive the vehicle at a speed for which cruise control operation is possible.

      2. Turn the cruise control system on using the cruise control switch (ON-OFF button).

      3. Push the cruise control switch to -/SET to begin control of vehicle speed using the cruise control system.

    5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

    6. Check for DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC C1A11 or C1A14 is output B

    7. Turn the power switch off.


    A

    END

    B

  3. REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

    Click here


    NEXT

  4. CHECK FOR DTCs (C1A11 OR C1A14)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Clear the DTCs Click here.

    4. Perform the following to make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the malfunction cannot be detected.


      1. Drive the vehicle at a speed for which cruise control operation is possible.

      2. Turn the cruise control system on using the cruise control switch (ON-OFF button).

      3. Push the cruise control switch to -/SET to begin control of vehicle speed using the cruise control system.

    5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

    6. Check for DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC C1A11 or C1A14 is output B

    7. Turn the power switch off.


    A

    END

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here