DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:C1A52

DTC Code DTC Name
C1A52 Radar Cruise Control Presence Determination Malfunction (Engine / HV)

DESCRIPTION

DTC C1A52 is stored when the hybrid vehicle control ECU cannot recognize the millimeter wave radar sensor assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A52 Radar Cruise Control Presence Determination Malfunction (Engine / HV) Approximately 17 seconds after the power switch is turned on (IG) the hybrid vehicle control ECU cannot recognize the millimeter wave radar sensor assembly for approximately 1.3 seconds or more.

  • Hybrid vehicle control ECU

  • Millimeter wave radar sensor assembly

CAUTION / NOTICE / HINT

Note

When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly 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. As a result, a DTC may be stored.

PROCEDURE


  1. CHECK FOR DTC (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 power switch on (IG).

      2. Wait for 20 seconds or more.

    3. Check for DTCs.

      Click here


      Powertrain > Radar Cruise2 > Trouble Codes
      Result
      Result Proceed to
      DTC C1A52 is not output A
      DTC C1A52 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  2. REPLACE HYBRID VEHICLE CONTROL ECU


    1. Replace the hybrid vehicle control ECU.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK FOR DTC (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 power switch on (IG).

      2. Wait for 20 seconds or more.

    3. Check for DTCs.

      Click here


      Powertrain > Radar Cruise2 > Trouble Codes
      Result
      Result Proceed to
      DTC C1A52 is not output A
      DTC C1A52 is output B

    A

    END (HYBRID VEHICLE CONTROL ECU WAS DEFECTIVE)

    B

    REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here