DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:C1A03

DTC Code DTC Name
C1A03 Driving Support ECU Internal Logical Error

DESCRIPTION

If an internal failure (cruise cancel circuit malfunction) in the driving support ECU assembly occurs, DTC C1A03 is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A03 Driving Support ECU Internal Logical Error When the engine switch is on (IG), the driving support ECU assembly detects an internal malfunction (cruise cancel circuit malfunction) for 0.2 seconds. 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 (RADAR CRUISE)


    1. Clear the DTCs.

      Click here


      Powertrain > Radar Cruise > Clear DTCs

    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 engine switch on (IG).

      2. Wait for 1 second or more.

    3. Check for DTCs.

      Click here


      Powertrain > Radar Cruise > Trouble Codes
      Result
      Result Proceed to
      DTC C1A03 is not output A
      DTC C1A03 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here