ENGINE IMMOBILISER SYSTEM, Diagnostic DTC:B2784

DTC Code DTC Name
B2784 Antenna Coil Open / Short

DESCRIPTION

This DTC is output when there is an open or short malfunction in the transponder key coil (built into the engine switch).

DTC Code DTC Detection Condition Trouble Area
B2784 The antenna coil is open/shorted.

  • Certification ECU (Smart key ECU assembly)

  • Engine switch

INSPECTION PROCEDURE

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC B2784 is not output.

    NG

    REPLACE ENGINE SWITCH Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  3. REPLACE ENGINE SWITCH


    1. for 1UR-FE

      Temporarily replace the engine switch with a new one Click here.

    2. for 3UR-FE

      Temporarily replace the engine switch with a new one Click here.


    NEXT

  4. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  5. CHECK FOR DTC


    1. Recheck for DTCs Click here.

      OK
      DTC B2784 is not output.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    END (ENGINE SWITCH IS DEFECTIVE)