DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:C1A40

DTC Code DTC Name
C1A40 ENG / EHV Device

DESCRIPTION

When the driving support ECU assembly receives an hybrid control system malfunction signal from the power management control ECU, this DTC is stored.

When DTC C1A40 is stored, the engine control system or Automatic transmission system DTC will also be stored.

DTC Code DTC Detection Condition Trouble Area
C1A40 While the power switch is on (IG), an hybrid control system malfunction signal is detected for 3 second or more.

  • Hybrid control system

  • SFI system

  • Power management control ECU

  • Driving support ECU assembly

  • ECM

CAUTION / NOTICE / HINT

Note


  • When replacing the driving support ECU assembly, make sure to replace it with a new one. If a device 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, and as a result, a DTC may be stored.

  • First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting.


PROCEDURE


  1. CHECK FOR DTCs (HYBRID CONTROL SYSTEM)


    1. Check for DTCs.


      Result
      Result Proceed to
      Hybrid control system DTCs are not output A
      Hybrid control system DTCs are output (for 2AR-FSE) B
      Hybrid control system DTCs are output (for 2GR-FXE) C

    B

    GO TO HYBRID CONTROL SYSTEM Click here

    C

    GO TO HYBRID CONTROL SYSTEM Click here

    A

  2. CHECK FOR DTCs (SFI SYSTEM)


    1. Check for DTCs.


      Result
      Result Proceed to
      SFI system DTCs are not output A
      SFI system DTCs are output (for 2AR-FSE (w/ EGR System)) B
      SFI system DTCs are output (for 2AR-FSE (w/o EGR System)) C
      SFI system DTCs are output (for 2GR-FXE) D

    B

    GO TO SFI SYSTEM Click here

    C

    GO TO SFI SYSTEM Click here

    D

    GO TO SFI SYSTEM Click here

    A

  3. REPLACE DRIVING SUPPORT ECU ASSEMBLY


    1. Replace the driving support ECU assembly Click here.


    NEXT

  4. CHECK FOR DTCs


    1. Clear the DTCs Click here.

    2. Make sure the following conditions are met:

      Tech Tips

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


      1. Turn the power switch on (IG).

      2. Wait for 3 seconds or more.

    3. Check for DTCs Click here.

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

    A

    END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE)

    B

  5. REPLACE POWER MANAGEMENT CONTROL ECU


    1. Replace the power management control ECU with a new one Click here.


    NEXT

  6. CHECK FOR DTCs


    1. Clear the DTCs Click here.

    2. Make sure the following conditions are met:

      Tech Tips

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


      1. Turn the power switch on (IG).

      2. Wait for 3 seconds or more.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1A40 is not output A
      DTC C1A40 is output (for 2AR-FSE) B
      DTC C1A40 is output (for 2GR-FXE) C

    A

    END

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here