DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:C1A51

DTC Code DTC Name
C1A51 Electric Parking Brake System Malfunction

DESCRIPTION

When the driving support ECU assembly receives parking brake operation signals from the electric parking brake ECU via the CAN communication line, the vehicle following function is canceled.

When the driving support ECU assembly receives an electric parking brake system malfunction signal from the parking brake ECU assembly via CAN communication, DTC C1A51 is stored.

DTC No. DTC Detection Condition Trouble Area
C1A51 With power switch on (IG), when driving support ECU assembly receives electric parking brake system malfunction signal from electric parking brake ECU for 0.2 seconds or more.

  • Electric parking brake system

  • Parking brake 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.

  • 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 (ELECTRIC PARKING BRAKE SYSTEM)


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      Electric parking brake system DTCs are not output A
      Electric parking brake system DTCs are output B

    B

    GO TO ELECTRIC PARKING BRAKE SYSTEM Click here

    A

  2. 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.


      1. Turn the power switch on (IG).

      2. Wait for 0.2 seconds or more.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1A51 is not output A
      DTC C1A51 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here