Dtc B2784 Antenna Coil Open / Short

Securities. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Engine Immobiliser. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (TRANSPONDER KEY COIL)

CHECK WIRE HARNESS (TRANSPONDER KEY ECU - TRANSPONDER KEY AMPLIFIER)

DTC B2784 Antenna Coil Open / Short


DESCRIPTION

The transponder key coil receives key code signals from the transponder chip in the key grip. The coil built into the transponder key amplifier amplifies the key code signals and outputs the signal to the transponder key ECU.

DTC Code
DTC Detection Condition
Trouble Area
B2784
When transponder key coil is open or short
  1. Transponder key ECU
  2. Transponder key amplifier
  3. Wire harness

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Engine Immobiliser.Engine Immobiliser System (W/ Entry And Start System). Dtc B2784 Antenna Coil Open / Short


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (TRANSPONDER KEY COIL)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON with a key that cannot start the engine.

  1. On the intelligent tester, enter the following menus: Body / Immobiliser / Data List / Antenna Coil Status. Read the result.

    Immobiliser
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Antenna Coil Status
    		Transponder key coil condition / Normal or Fail
    		Normal: Transponder key coil is normal
    Fail: Transponder key coil is malfunctioning
    		-
    OK:
    Normal (Transponder key coil is normal) appears on the screen.


OK
REPLACE TRANSPONDER KEY ECU
NG


2.CHECK WIRE HARNESS (TRANSPONDER KEY ECU - TRANSPONDER KEY AMPLIFIER)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Engine Immobiliser.Engine Immobiliser System (W/ Entry And Start System). Dtc B2784 Antenna Coil Open / Short

  1. Disconnect the E50 ECU connector.

  1. Disconnect the E8 amplifier connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard Resistance:
    Tester Connection
    		Specified Condition
    E50-14 (VC5) - E8-1 (VC5)
    		Below 1 Ω
    E50-15 (CODE) - E8-4 (CODE)
    E50-4 (TXCT) - E8-5 (TXCT)
    E50-5 (AGND) - E8-7 (AGND)
    E50-14 (VC5) or E8-1 (VC5) - Body ground
    		10 kΩ or higher
    E50-15 (CODE) or E8-4 (CODE) - Body ground
    E50-4 (TXCT) or E8-5 (TXCT) - Body ground
    E50-5 (AGND) or E8-7 (AGND) - Body ground


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE TRANSPONDER KEY AMPLIFIER