PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A40

DTC Code DTC Name
C1A40 ENG / EHV Device

DESCRIPTION

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

When DTC C1A40 is detected, the hybrid control system or engine control system DTC will also be detected.

DTC No. DTC Detection Condition Trouble Area
C1A40 While power switch is on (IG), hybrid control system or engine control system malfunction signal is detected for 1 second.

  • Hybrid control system

  • Power management control ECU

  • Engine control system

  • Driving support ECU

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL SYSTEM)


    1. Check DTCs for 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 engine control system Click here w/EGR System, Click here w/o EGR System).

      OK
      Engine control system DTC is not output.
      Result
      Result Proceed to
      OK A
      NG (w/EGR System) B
      NG (w/o EGR System) C

    B

    GO TO ENGINE CONTROL SYSTEM Click here

    C

    GO TO ENGINE CONTROL SYSTEM Click here

    A

  3. REPLACE POWER MANAGEMENT CONTROL ECU


    1. Replace the power management control ECU Click here for LHD, Click here for RHD).


    NEXT

  4. CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)


    1. Using the intelligent tester, enter the following menus: Body / Pre-Crash 2 / DTC.

    2. Clear the DTCs Click here.

    3. Check for DTCs.

      OK
      DTC C1A40 is not output.

    NG

    REPLACE DRIVING SUPPORT ECU Click here

    OK

    END