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, etc., the front 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 front millimeter wave radar sensor assembly's beam axis is deviated, the driving support ECU detects this, and outputs DTC C1A11.

After installing a new front millimeter wave radar sensor, if the sensor beam axis adjustment is not performed, DTC C1A14 is output.

DTC Code DTC Detection Condition Trouble Area
C1A11 While engine 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's beam axis is deviated

  • Front millimeter wave radar sensor

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

  • Front millimeter wave radar sensor

  • Driving support ECU

INSPECTION PROCEDURE

PROCEDURE


  1. ADJUST FRONT MILLIMETER WAVE RADAR SENSOR


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


    NEXT

  2. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC C1A11 or C1A14 is not output.

      Tech Tips

      After performing the radar beam axis adjustment, if the same DTC is output again after the DTC detection conditions are met, replace the driving support ECU.


    NG

    REPLACE DRIVING SUPPORT ECU Click here

    OK

    END