DYNAMIC RADAR CRUISE CONTROL SYSTEM(for 6AR-FSE), Diagnostic DTC:C1A0A

DTC Code DTC Name
C1A0A Front Radar Sensor Region Code Mismatch

DESCRIPTION

The driving support ECU assembly uses the millimeter wave radar sensor assembly to detect obstacles in front of the vehicle.

Based on this information, the driving support ECU assembly sends dynamic radar cruise control operation signals.

When the millimeter wave radar sensor assembly is replaced with a new one, it acquires the country specification information from the driving support ECU assembly. Also, when the driving support ECU assembly is replaced with a new one, it receives country specification information from the main body ECU (multiplex network body ECU). When country specification information in the millimeter wave radar sensor assembly, driving support ECU and/or main body ECU do not match, DTC C1A0A is stored.

DTC No. DTC Detection Condition Trouble Area
C1A0A When the engine switch is on (IG) and the dynamic radar cruise control system is operating, country specification information in driving support ECU assembly and millimeter wave radar sensor assembly do not match for approximately 1.4 seconds or more.

  • Millimeter wave radar sensor 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.

  • When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed Click here.

  • 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 Click here.

PROCEDURE


  1. CHECK FOR DTCs (DTC C1A0A)


    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: Powertrain / Radar Cruise2 / Trouble Codes.

    6. Check for DTCs.

      Result
      Result Proceed to
      DTC C1A0A is output A
      DTC is not output B

    7. Turn the engine switch off.


    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. REPLACE DRIVING SUPPORT ECU ASSEMBLY

    Click here


    NEXT

  3. CHECK FOR DTCs (DTC C1A0A)


    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: Powertrain / Radar Cruise2 / Trouble Codes.

    6. Check for DTCs.

      Result
      Result Proceed to
      DTC C1A0A is output A
      DTC is not output B

    7. Turn the engine switch off.


    B

    END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE)

    A

  4. REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

    Click here


    NEXT

  5. ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY

    Click here


    NEXT

    END