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PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A0A

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DTC Code DTC Name
C1A0A Front Radar Sensor Region Code Mismatch
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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 and/or main body ECU do not match, DTC C1A0A is stored.

DTC No. DTC Detection Condition Trouble Area
C1A0A 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 1 second.

  • Millimeter wave radar sensor assembly

  • Driving support ECU assembly
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CAUTION / NOTICE / HINT

Note:

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).

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PROCEDURE


  1. Click here

    CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY


    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.

      Table 1. Radar Cruise
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Country# (F Radar Sens) Millimeter wave radar sensor assembly country signal/JPN, NA, EURO, AUS, SAFC, OTHER, TWN, CHINA, THAI, GCC or NOFIX Actual country code -

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

      Table 2. 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

  2. Click here

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. Replace the main body ECU (multiplex network body ECU) (Click here).


  3. Click here

    CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Pre-Crash 2 / Trouble Codes.

    5. Clear the DTCs (Click here).

    6. Recheck for DTCs.

      OK
      DTC C1A0A is not output.

    • OK

      END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE)

    • NG

      REPLACE DRIVING SUPPORT ECU ASSEMBLY (Click here)