CRUISE CONTROL SYSTEM(for 1ND-TV with Driving support ECU), Diagnostic DTC:C1A40

DTC Code DTC Name
C1A40 ENG / EHV Device

DESCRIPTION

When the driving support ECU assembly receives an ECD system malfunction signal from the ECM, this DTC is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A40 ENG / EHV Device While the vehicle is driven at a speed of approximately 40 km/h (25 mph) or more and the cruise control switch is on, an ECD system malfunction signal is detected for 1 second or more.

  • ECD system

  • ECM

  • Driving support ECU assembly

PROCEDURE


  1. CHECK FOR DTCs (ECD SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Check for DTCs.

      Click here


      Powertrain > Engine and ECT > Trouble Codes

    6. Turn the ignition switch off.

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

    B

    GO TO ECD SYSTEM Click here

    A

  2. REPLACE DRIVING SUPPORT ECU ASSEMBLY


    1. Replace the driving support ECU assembly.

      Click here

      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

    NEXT

  3. CHECK FOR DTCs


    1. Clear the DTCs.

      Click here


      Powertrain > Cruise Control > 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


      Powertrain > Cruise Control > 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 ECM Click here