PRE-CRASH SAFETY 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 assembly to detect obstacles in front of the vehicle.

Based on this information, the driving support ECU assembly sends pre-crash safety 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 assembly and/or main body ECU (multiplex network body ECU) do not match, DTC C1A0A is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A0A Front Radar Sensor Region Code Mismatch When the power switch is on (IG), the country specification information from the driving support ECU assembly and millimeter wave radar sensor assembly do not match for approximately 2 seconds.

  • Millimeter wave radar sensor assembly

  • Driving support ECU assembly

  • Main body ECU (multiplex network body ECU)

CAUTION / NOTICE / HINT

Note


  • Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

  • 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

PROCEDURE


  1. READ VALUE USING GTS (COUNTRY# (F RADAR SENS))


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Radar Cruise / Data List.

    5. Read the Data List according to the display on the GTS.


      Powertrain > Radar Cruise > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Country# (F Radar Sens) Destination country for millimeter wave radar sensor assembly JPN, NA, EURO, AUS, SAFC, OTHER, TWN, CHINA, THAI, GCC or NOFIX Actual country code -

      Powertrain > Radar Cruise > Data List
      Tester Display
      Country# (F Radar Sens)
      Result
      Result Proceed to
      Country specification information for vehicle and millimeter wave radar sensor assembly match A
      Country specification information for vehicle and millimeter wave radar sensor assembly do not match B

    B

    REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here

    A

  2. CHECK FOR DTCs (PRE-CRASH 2)


    1. Clear the DTCs.

      Click here


      Body Electrical > Pre-Crash 2 > 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.

    3. Check for DTCs.

      Click here


      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.

      Tech Tips

      The country specification information stored in the driving support ECU assembly is determined by the country specification information stored in the main body ECU (multiplex network body ECU). If the country specification information for the millimeter wave radar sensor assembly matches the vehicle, the country specification information for the main body ECU (multiplex network body ECU) and driving support ECU assembly is incorrect and the main body ECU (multiplex network body ECU) and driving support ECU assembly need to be replaced.

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

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND DRIVING SUPPORT ECU ASSEMBLY