PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A52

DTC Code DTC Name
C1A52 Driving Support ECU Communication Abnormal

DESCRIPTION

The DTC C1A52 is stored when the ECM cannot recognize the driving support ECU assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A52 Driving Support ECU Communication Abnormal When the engine switch is on (IG), the ECM cannot recognize the driving support ECU assembly

  • ECM

  • Driving support ECU assembly

PROCEDURE


  1. CHECK FOR DTCs (PRE-CRASH 2)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Clear the DTCs.

      Click here

    4. Make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.

    5. Enter the following menus: Body Electrical / Pre-Crash 2 / Trouble Codes.

    6. Check for DTCs.


      Body Electrical > Pre-Crash 2 > 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 ECM


    1. Replace the ECM with a new one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK FOR DTCs (PRE-CRASH 2)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Clear the DTCs.

      Click here

    4. Make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.

    5. Enter the following menus: Body Electrical / Pre-Crash 2 / Trouble Codes.

    6. Check for DTCs.


      Body Electrical > Pre-Crash 2 > Trouble Codes

      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.

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

    A

    END (ECM WAS DEFECTIVE)

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here