PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A0A

DTC Code DTC Name
C1A0A Front Radar Sensor Region Code Mismatch

DESCRIPTION

The driving support ECU uses the front millimeter wave radar sensor, rear millimeter wave radar sensor, driver monitor camera and object recognition camera to detect obstacles in front of and behind the vehicle, and detect the direction that the driver's head is facing. Based on this information, the driving support ECU sends pre-crash control operation signals.

When the front millimeter wave radar sensor is replaced with a new one, it acquires the country specification information from the driving support ECU. Also, when the driving support ECU is replaced with a new one, it receives country specification information from the combination meter. When country specification information in the sensor and ECU do not match, DTC C1A0A is output.

If the sensor and vehicle country specification information are the same, and the combination meter and the driving support ECU country specification information are different, C1A0B and C1A0C are output.

DTC Code DTC Detection Condition Trouble Area
C1A0A While initial check is running, power switch is ON (IG) and pre-crash safety system is operating, country specification information in driving support ECU and front millimeter wave radar sensor do not match for 1 second

  • Front millimeter wave radar sensor

  • Combination meter

  • Driving support ECU

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK FRONT MILLIMETER WAVE RADAR SENSOR


    1. Using the intelligent tester, enter the following menus: Powertrain / Radar Cruise. Then select "Data List".

    2. 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) Front millimeter wave radar sensor country signal/JPN, NA, EURO, AUS, SAFC, OTHER, TWN, CHINA, THAI, GCC, NOFIX EURO, AUS, SAFC, OTHER, TWN, CHINA, THAI or GCC -
      Result
      Result Proceed to
      Country specification information for vehicle and front millimeter wave radar sensor match A
      Country specification information for vehicle and front millimeter wave radar sensor do not match (Europe←→Japan, Japan←→North America) B
      Country specification information for vehicle and front millimeter wave radar sensor do not match (Europe←→North America) C

      Tech Tips


      • The country specification information of the driving support ECU is decided by the combination meter. Even if the vehicle and sensor country specification information match, if the country specification information for the vehicle and ECU/meter do not match, it is necessary to replace the ECU and meter.

      • When the country specification information (Europe←→North America) for the vehicle body and sensor do not match, the sensor's information can be overwritten by performing the sensor's axis adjustment.


    B

    REPLACE FRONT MILLIMETER WAVE RADAR SENSOR Click here

    C

    ADJUST FRONT MILLIMETER WAVE RADAR SENSOR Click here

    A

    REPLACE COMBINATION METER AND DRIVING SUPPORT ECU