PRE-CRASH SAFETY 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 engine control system malfunction signal from the power management control ECU via the CAN communication system, DTC C1A40 is stored.

When DTC C1A40 is stored, hybrid control system or engine control system DTCs will also be stored.

DTC No. DTC Detection Condition Trouble Area
C1A40 While the power switch is on (IG), a hybrid control system or engine control system malfunction signal is detected for 2 seconds.

  • Hybrid control system

  • Engine control system

  • Power management control ECU

  • ECM

  • Driving support ECU assembly

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL SYSTEM)


    1. Check for hybrid control system DTCs Click here.

      OK
      Hybrid control system DTCs are not output.

    NG

    GO TO HYBRID CONTROL SYSTEM Click here

    OK

  2. CHECK DTC OUTPUT (ENGINE CONTROL SYSTEM)


    1. Check for engine control system DTCs Click here.

      OK
      Engine control system DTCs are not output.

    NG

    GO TO ENGINE CONTROL SYSTEM Click here

    OK

  3. REPLACE POWER MANAGEMENT CONTROL ECU


    1. Replace the power management control ECU assembly Click here.


    NEXT

  4. CHECK DTC OUTPUT (PRE-CRASH SAFETY 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: Body Electrical / Pre-Crash 2 / Trouble Codes.

    5. Clear the DTCs Click here.

    6. Recheck for DTCs.

      OK
      DTC C1A40 is not output.

    OK

    END (POWER MANAGEMENT CONTROL ECU WAS DEFECTIVE)

    NG

  5. REPLACE DRIVING SUPPORT ECU ASSEMBLY


    1. Replace the driving support ECU assembly Click here.


    NEXT

  6. CHECK DTC OUTPUT (PRE-CRASH SAFETY 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: Body Electrical / Pre-Crash 2 / Trouble Codes.

    5. Clear the DTCs Click here.

    6. Recheck for DTCs.

      OK
      DTC C1A40 is not output.

    OK

    END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE ECM Click here