Dtc B2784 Antenna Coil Open / Short

Securities. Camry. Acv40 Gsv40
Engine Immobiliser. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC OUTPUT

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ENGINE SWITCH)

REPLACE ENGINE SWITCH

CHECK DTC OUTPUT

DTC 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 Code
DTC Detection Condition
Trouble Area
B2784
Antenna coil is open or shorted.
  1. Wire harness or connector
  2. Certification ECU (Smart key ECU assembly)
  3. Engine switch

WIRING DIAGRAM


Camry. Acv40 Gsv40.Engine Immobiliser.Engine Immobiliser System (W/ Entry And Start System).
Dtc
  B2784  Antenna Coil Open / Short


INSPECTION PROCEDURE

NOTICE:
If the certification ECU (smart key ECU assembly) is replaced, register all the keys.
1.CHECK DTC OUTPUT
  1. Clear the DTCs (CAMRY_ACV40 RM000001GV802CX.html).

  1. Recheck for DTCs (CAMRY_ACV40 RM000001GV802CX.html).

    OK:
    B2784 output does not recur.


NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK (CAMRY_ACV40 RM000000UZ104DX.html)

2.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ENGINE SWITCH)
  1. Disconnect the certification ECU (smart key ECU assembly) connector.



    Camry. Acv40 Gsv40.Engine Immobiliser.Engine Immobiliser System (W/ Entry And Start System).
Dtc
  B2784  Antenna Coil Open / Short
  1. Disconnect the engine switch connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    E74-8 (TXCT) - E70-9 (TXCT)
    Always
    Below 1 Ω
    E74-9 (CODE) - E70-10 (CODE)
    Always
    Below 1 Ω
    E74-8 (TXCT) - Body ground
    Always
    10 kΩ or higher
    E74-9 (CODE) - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.REPLACE ENGINE SWITCH
  1. Replace the engine switch (CAMRY_ACV40 RM0000026WR00UX.html).


NEXT


4.CHECK DTC OUTPUT
  1. Clear the DTCs (CAMRY_ACV40 RM000001GV802CX.html).

  1. Recheck for DTCs (CAMRY_ACV40 RM000001GV802CX.html).

    OK:
    B2784 output does not recur.


NG
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
OK

END (ENGINE SWITCH WAS DEFECTIVE)