DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:C1A02

DTC Code DTC Name
C1A02 Vehicle Information Not Obtained

DESCRIPTION

When the driving support ECU is replaced with a new one, it acquires the country specification information (destination, steering wheel position, etc.) from the main body ECU (multiplex network body ECU). When the country specification information in the driving support ECU assembly and main body ECU (multiplex network body ECU) do not match, DTC C1A02 is output.

DTC No. DTC Detection Condition Trouble Area
C1A02 When the power switch is on (IG) or the dynamic radar cruise control system is operating, the driving support ECU assembly does not receive vehicle information for 1 second or more while the vehicle is being driven at a speed of 10 km/h or more.

  • Driving support ECU assembly

  • Main body ECU (multiplex network body ECU)

INSPECTION PROCEDURE

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.

PROCEDURE


  1. READ VALUE USING TECHSTREAM (COUNTRY# (DSS))


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Body Electrical / Pre-Collision 2 / Data List.

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

      Pre-Collision 2
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Country# (DSS) Destination country for driving support ECU assembly/JPN, NA, EURO, CA, AUS, SAFC, OTHER, TWN, CHINA, THAI, GCC or NOFIX Actual country code -

      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
      Country specification information for vehicle and driving support ECU assembly match A
      Country specification information for vehicle and driving support ECU assembly do not match B

    B

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

    A

  2. CHECK FOR DTCs (DTC C1A02)


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Clear the DTCs Click here.

    5. 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 for which cruise control operation is possible.

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

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

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

    7. Check for DTCs.

      Result
      Result Proceed to
      DTC C1A02 is not output A
      DTC C1A02 is output B

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here