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DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:C1A40

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DTC Code DTC Name
C1A40 ENG / EHV Device
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DESCRIPTION

When the driving support ECU assembly receives a SFI system or automatic transmission system malfunction signal from the ECM, this DTC is stored.

When DTC C1A40 is stored, the SFI system or automatic transmission system DTC will also be stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A40 ENG / EHV Device When the cruise control switch is on and the vehicle is being driven at a speed of 36 km/h (22 mph) or more, an SFI system malfunction signal is detected for 2 seconds or more.

  • SFI system

  • Automatic transmission system

  • ECM

  • Driving support ECU assembly
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PROCEDURE


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    CHECK FOR DTCs (SFI SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    5. Check for DTCs.


      1. Powertrain > Engine > Trouble Codes


      Result
      Result Proceed to
      SFI system DTCs are not output A
      SFI system DTCs are output B

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    CHECK FOR DTCs (AUTOMATIC TRANSMISSION SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    5. Check for DTCs.


      1. Powertrain > Engine > Trouble Codes



      1. Powertrain > ECT > Trouble Codes


      Result
      Result Proceed to
      Automatic transmission system DTCs are not output A
      Automatic transmission system DTCs are output B

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    REPLACE DRIVING SUPPORT ECU ASSEMBLY


    1. Replace the driving support ECU assembly.

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      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.

      Result
      Proceed to
      NEXT

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    CHECK FOR DTCs (RADAR CRUISE)


    1. Clear the DTCs.

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      1. Powertrain > Radar Cruise > Clear DTCs


    2. Make sure that the DTC detection conditions are met.

      Tip:

      If the detection conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs.

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      1. Powertrain > Radar Cruise > Trouble Codes


      Result
      Result Proceed to
      DTC C1A40 is not output A
      DTC C1A40 is output B

    • A

      END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE)

    • B

      REPLACE ECMClick here