DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:C1A52

DTC Code DTC Name
C1A52 Driving Support ECU Communication Abnormal

DESCRIPTION

If the EV control ECU incorrectly identifies the driving support ECU, DTC C1A52 is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A52 Driving Support ECU Communication Abnormal At a vehicle speed of 36 km/h or more with the power switch on (IG), the EV control ECU incorrectly identifies the driving support ECU for 1.132 seconds or more continuously.

  • EV control ECU

  • Driving support ECU assembly

CAUTION / NOTICE / HINT

Note


  • When replacing the driving support ECU 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 driving support ECU assembly will not match the information from the vehicle, and as a result, a DTC may be stored.

  • Perform Registration (VIN registration) when replacing the EV control ECU.

    Click here

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Powertrain > Radar Cruise > Clear DTCs

    2. Check for DTCs.

      Click here


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

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. REPLACE EV CONTROL ECU


    1. Replace the EV control ECU.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Powertrain > Radar Cruise > Clear DTCs

    2. Check for DTCs.

      Click here


      Powertrain > Radar Cruise > Trouble Codes
      Result
      Result Proceed to
      DTC C1A52 are not output A
      DTC C1A52 is output (for LHD) B
      DTC C1A52 is output (for RHD) C

    A

    END (EV CONTROL ECU WAS DEFECTIVE)

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    C

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here