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

When the system determines that the vehicle is driving straight ahead based on signals from the yaw rate sensor (airbag sensor assembly), etc., the millimeter wave radar sensor assembly performs self-diagnosis to check if the sensor beam axis is misaligned.

C1A11 is output when it is determined that the millimeter wave radar sensor assembly beam axis is misaligned.

If sensor beam axis adjustment is not performed after installing a new millimeter wave radar sensor assembly, C1A14 is output.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A11 Front Radar Sensor Incorrect Axial Gap

    w/o Full-speed range following function:

  • When the vehicle is being driven at a speed of 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, misalignment of the millimeter wave radar sensor assembly is detected for approximately 0.3 seconds or more.


    w/ Full-speed range following function:

  • When the vehicle is being driven at a speed of 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, misalignment of the millimeter wave radar sensor assembly is detected for approximately 0.3 seconds or more.

  • Millimeter wave radar sensor assembly
C1A14 Front Radar Sensor Beam Axis Not Adjusted

    w/o Full-speed range following function:

  • When the vehicle is being driven at a speed of 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, incompletion of the millimeter wave radar sensor beam axis alignment is detected for approximately 0.3 seconds or more.


    w/ Full-speed range following function:

  • When the vehicle is being driven at a speed of 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, incompletion of the millimeter wave radar sensor beam axis alignment is detected for approximately 0.3 seconds or more.

  • Millimeter wave radar sensor assembly

CAUTION / NOTICE / HINT

Note


  • When replacing the millimeter wave radar sensor assembly, make sure to replace it with a new one. If a device which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle, and as a result, a DTC may be stored.

  • 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

PROCEDURE


  1. CHECK FOR DTCs (RADAR CRUISE 2)


    1. Check if the stored DTCs are current DTCs.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Enter the following menus: Body Electrical / Radar Cruise 2 / Trouble Codes.

      Click here

    5. Check for DTCs.

      Click here


      Powertrain > Radar Cruise2 > Trouble Codes
      Result
      Result Proceed to
      Current DTC C1A11 is output A
      Current DTC C1A14 is output B
      History DTC C1A11 is output C

    B

    ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here

    C

    CLEAR DTC (RADAR CRUISE 2) Click here

    A

  2. CHECK VEHICLE CONDITION


    1. Check the operating conditions of the vehicle.

      Tech Tips

      DTC C1A11 may be stored if the millimeter wave radar sensor assembly beam axis is temporarily misaligned due to the vehicle being overloaded.

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

    B

    ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here

    A

  3. CHECK WHEEL ALIGNMENT


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

      for front wheel alignment: Click here

      for rear wheel alignment: Click here

      Tech Tips

      DTC C1A11 may be stored if the millimeter wave radar sensor assembly beam axis is misaligned due to incorrect 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 MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here

    A

  4. ADJUST WHEEL ALIGNMENT


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

      for front wheel alignment: Click here

      for rear wheel alignment: Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY


    1. Perform millimeter wave radar sensor assembly adjustment.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  6. CHECK FOR DTCs (RADAR CRUISE 2)


    1. Clear the DTCs.

      Click here


      Powertrain > Radar Cruise2 > 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.


      1. Turn the ignition switch to ON.

      2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON/OFF button).

      3. w/ Full-speed range following function: Drive the vehicle at 5 km/h (3 mph) or more for 1 second or more.

        w/o Full-speed range following function: Drive the vehicle at 36 km/h (22 mph) or more for 1 second or more.

    3. Check for DTCs.

      Click here


      Powertrain > Radar Cruise2 > Trouble Codes
      Result
      Result Proceed to
      DTC C1A11 is not output A
      DTC C1A11 is output B

    A

    END

    B

    GO TO STEP 8 Click here

  7. CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY


    1. Check that the bracket of the millimeter wave radar sensor assembly is not deformed.

      Click here

      Tech Tips

      If the bracket is deformed, replace the millimeter wave radar sensor assembly.

      Result
      Result Proceed to
      Bracket is not deformed A
      Bracket is deformed B

    A

    GO TO STEP 5 Click here

    B

  8. REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY


    1. Replace the millimeter wave radar sensor assembly.

      Click here

    2. Perform millimeter wave radar sensor assembly adjustment.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  9. CHECK FOR DTCs (RADAR CRUISE 2)


    1. Clear the DTCs.

      Click here


      Powertrain > Radar Cruise2 > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

    END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE)

  10. ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY


    1. Return the vehicle to normal operating conditions.

    2. Perform millimeter wave radar sensor assembly adjustment.

      Click here

    3. Clear the DTCs.

      Click here


      Powertrain > Radar Cruise2 > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

    END

  11. ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY


    1. Perform millimeter wave radar sensor assembly adjustment.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  12. CHECK FOR DTCs (RADAR CRUISE 2)


    1. Clear the DTCs.

      Click here


      Powertrain > Radar Cruise2 > 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.


      1. Turn the ignition switch to ON.

      2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON/OFF button).

      3. w/ Full-speed range following function: Drive the vehicle at 5 km/h (3 mph) or more for 1 second or more.

        w/o Full-speed range following function: Drive the vehicle at 36 km/h (22 mph) or more for 1 second or more.

    3. Check for DTCs.

      Click here


      Powertrain > Radar Cruise2 > Trouble Codes
      Result
      Result Proceed to
      DTC C1A14 is not output A
      DTC C1A14 is output B

    A

    END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE)

    B

    GO TO STEP 8 Click here

  13. CLEAR DTC (RADAR CRUISE 2)


    1. Check for DTCs related to misalignment of millimeter wave radar sensor assembly.

      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


      Powertrain > Radar Cruise2 > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

    END