DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:C1A40

DTC Code DTC Name
C1A40 ENG / EHV Device

DESCRIPTION

When the driving support ECU assembly receives a hybrid control system or SFI system malfunction signal from the power management control ECU or ECM via CAN communication, DTC C1A40 is stored.

DTC No. DTC Detection Condition Trouble Area
C1A40 While power switch is on (IG) and dynamic radar cruise control system is operating, hybrid control system or SFI system malfunction signal is detected for 1 second

  • Hybrid control system

  • Power management control ECU

  • SFI system

  • ECM

  • Driving support ECU assembly

WIRING DIAGRAM

A004254E10

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC (HYBRID CONTROL SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    5. Check for DTCs.

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

    B

    GO TO HYBRID CONTROL SYSTEM Click here

    A

  2. CHECK FOR DTC (SFI SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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

    5. Check for DTCs.

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

    B

    GO TO SFI SYSTEM Click here

    A

  3. CHECK FOR DTCs (DTC C1A40)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Clear the DTCs Click here.

    4. 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 radar cruise control operation is possible.

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

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

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

    6. Check for DTCs.

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

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    A

    END

  4. REPLACE POWER MANAGEMENT CONTROL ECU


    1. Replace the power management control ECU Click here.


    NEXT

  5. CHECK FOR DTCs (DTC C1A40)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Clear the DTCs Click here.

    4. 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 radar cruise control operation is possible.

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

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

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

    6. Check for DTCs.

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

    B

    REPLACE ECM Click here

    A

    END

  6. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  7. CHECK FOR DTCs (DTC C1A40)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Clear the DTCs Click here.

    4. 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 radar cruise control operation is possible.

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

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

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

    6. Check for DTCs.

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

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    A

    END