Toyota 4Runner: Antenna Coil Open / Short (B2784)

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Engine Immobiliser System(w/o Smart Key System) / Antenna Coil Open / Short (B2784)

DESCRIPTION

The antenna coil receives key code signals from the transponder chip in the key grip. The coil is built into the transponder key amplifier, which amplifies the key code signals and outputs the signals to the transponder key ECU assembly.

This DTC is stored when there is an open or short in the antenna coil.

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

PROCEDURE

CLEAR DTC

(a) Clear the DTCs (See page ).

2.	CHECK FOR DTC

(a) Check for DTCs (See page ).

OK:

DTC B2784 is not output.

USE SIMULATION METHOD TO CHECK

REPLACE TRANSPONDER KEY AMPLIFIER

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