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 hybrid vehicle 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 2.4 seconds or more.

  • Hybrid control system

  • Engine control system

  • Hybrid vehicle control ECU

  • Driving support ECU assembly

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL SYSTEM)


    1. Check DTCs for the hybrid control system Click here.

      OK
      Hybrid control system DTC is not output.

    NG

    GO TO HYBRID CONTROL SYSTEM Click here

    OK

  2. CHECK DTC OUTPUT (ENGINE CONTROL SYSTEM)


    1. Check DTCs for the engine control system Click here.

      OK
      Engine control system DTC is not output.

    NG

    GO TO ENGINE CONTROL SYSTEM Click here

    OK

  3. REPLACE HYBRID VEHICLE CONTROL ECU


    1. Replace the hybrid vehicle control ECU Click here.


    NEXT

  4. CHECK DTC OUTPUT (PRE-CRASH 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:


      1. 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 (HYBRID VEHICLE CONTROL ECU WAS DEFECTIVE)

    NG

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here