DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:C1A52

DTC Code DTC Name
C1A52 Driving Support ECU Communication Abnormal

DESCRIPTION

DTC C1A52 is stored when the hybrid vehicle control ECU assembly cannot recognize the driving support ECU assembly.

DTC No. DTC Detection Condition Trouble Area
C1A52 Approximately 17 seconds after the power switch is turned on (IG), the hybrid vehicle control ECU assembly cannot recognize the driving support ECU assembly for approximately 1.3 seconds or more.

  • Hybrid vehicle control ECU assembly

  • Driving support ECU assembly

CAUTION / NOTICE / HINT

Note

When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

PROCEDURE


  1. CHECK FOR DTCs (C1A52)


    1. Clear the DTCs Click here.

    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.

    3. Enter the following menus: Powertrain / Radar Cruise2 / Trouble Codes.

    4. Check for DTCs.

      Result
      Result Proceed to
      DTC C1A52 is output A
      DTC is not output B

    5. Turn the power switch off.


    B

    USE SIMULATION METHOD TO CHECK

    A

  2. REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY

    Click here


    NEXT

  3. CHECK FOR DTCs (C1A52)


    1. Clear the DTCs Click here.

    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.

    3. Enter the following menus: Powertrain / Radar Cruise2 / Trouble Codes.

    4. Check for DTCs.

      Result
      Result Proceed to
      DTC C1A52 is output A
      DTC is not output B

    A

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    B

    END (HYBRID VEHICLE CONTROL ECU ASSEMBLY WAS DEFECTIVE)