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 vehicle is determined to be driving in a straight line or on a slow curve based on signals from the yaw rate sensor, the millimeter wave radar sensor assembly performs a self diagnosis to check if the sensor beam axis is deviated from the vehicle movement direction. When the millimeter wave radar sensor assembly's beam axis is deviated, the driving support ECU detects this, and outputs DTC C1A11.

After installing a new millimeter wave radar sensor assembly, if the 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 after driving at approximately 50 km/h (31 mph) for 10 hours, driving support ECU determines that aim of front millimeter wave radar sensor assembly's beam axis is deviated

  • Millimeter wave radar sensor assembly

  • Driving support ECU
C1A14 Driving at 10 km/h (6 mph) or more while front millimeter wave radar sensor assembly's axis adjustment has not been performed

  • Millimeter wave radar sensor assembly

  • Driving support ECU

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY


    1. Adjust the front millimeter wave radar sensor Click here.


    NEXT

  2. CHECK WHETHER DTC OUTPUT RECURS (C1A11 OR C1A14)


    1. Connect the intelligent tester 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 of 40 km/h (25 mph) or more.

      2. Turn the cruise control main switch on.

      3. Push the -SET switch to activate the cruise control.

    5. Enter the following menus: Powertrain / Radar Cruise / DTC.

    6. Read the DTCs.

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

    B

    REPLACE DRIVING SUPPORT ECU Click here

    A

    END