DYNAMIC RADAR CRUISE CONTROL SYSTEM, 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 to detect obstacles in front of the vehicle.

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 the country specification information from the main body ECU. When the country specification information in the sensor and ECU do not match, DTC C1A0A is stored.

DTC No. DTC Detection Condition Trouble Area
C1A0A While power switch is on (IG), country specification information in driving support ECU assembly and front millimeter wave radar sensor do not match for 1 second or more while the dynamic radar cruise control is operating

  • Millimeter wave radar sensor assembly

  • Driving support ECU assembly

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Clear the DTCs.

    4. Enter the following menus: Powertrain / Radar Cruise / Data List / Country# (F Radar Sens).

    5. Read the Data List and check the country specification information of the front millimeter wave radar sensor and vehicle.

      Radar Cruise
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Country# (F Radar Sens) Millimeter wave radar sensor country signal / JPN, NA, EURO, AUS, OTHER Actual country code -
      Result
      Result Proceed to
      Country specification information for vehicle and millimeter wave radar sensor match A
      Country specification information for vehicle and millimeter wave radar sensor do not match B

    B

    REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here

    A

  2. CHECK FOR DTCs (DTC C1A0A)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Clear the DTCs Click here.

    4. Perform the following to make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the malfunction cannot be detected.


      1. Drive the vehicle at a speed of between 50 km/h (30 mph) and 170 km/h (105 mph).

      2. Turn the cruise control system on using the cruise control switch (ON-OFF button).

      3. Push the cruise control switch to -/SET to begin control of vehicle speed using the cruise control system.

    5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

    6. Check for DTCs.

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

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here