ENGINE IMMOBILISER SYSTEM (w/ Smart Entry and Start System), Diagnostic DTC:B2784

DTC Code DTC Name
B2784 Antenna Coil Open / Short

DESCRIPTION

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

DTC No. DTC Detection Condition Trouble Area
B2784 Transponder key coil is open or shorted.

  • Certification ECU (Smart key ECU assembly)

  • Engine switch

INSPECTION PROCEDURE

Note

If the certification ECU (smart key ECU assembly) is replaced, register the key (Refer to Service Bulletin).

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

    2. Recheck for DTCs Click here.

      OK
      DTC B2784 is not output.

    NG

    REPLACE ENGINE SWITCH Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. REPLACE ENGINE SWITCH


    1. Replace the engine switch Click here.


    NEXT

  3. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

    2. Recheck for DTCs Click here.

      OK
      DTC B2784 is not output.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    END (ENGINE SWITCH WAS DEFECTIVE)