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 power management control ECU 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 power management control ECU cannot recognize the driving support ECU assembly for approximately 1.3 seconds or more.

  • Power management control ECU

  • 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.

  • First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting.


PROCEDURE


  1. CHECK FOR DTCs


    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.


      • Turn the power switch on (IG) and wait approximately 20 seconds or more.

    3. Check for DTCs Click here.

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

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. REPLACE POWER MANAGEMENT CONTROL ECU


    1. Replace the power management control ECU with a new one Click here.


    NEXT

  3. CHECK FOR DTCs


    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.


      • Turn the power switch on (IG) and wait approximately 20 seconds or more.

    3. Check for DTCs Click here.

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

    A

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    B

    END (POWER MANAGEMENT CONTROL ECU WAS DEFECTIVE)