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

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

DESCRIPTION

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

DTC Code	DTC Detection Condition	Trouble Area
B2784	The transponder key amplifier coil is open/shorted.	Certification ECU Engine switch

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the certification ECU, refer to Registration (See page ).

PROCEDURE

1.	REPLACE ENGINE SWITCH

(a) Temporarily replace the engine switch with a new or normally functioning one (See page ).

CLEAR DTC

(a) Clear the DTCs (See page ).

3.	CHECK FOR DTC

(a) Check for DTCs (See page ).

OK:

DTC B2784 is not output.

END (ENGINE SWITCH IS DEFECTIVE)

REPLACE CERTIFICATION ECU

Short to GND in Immobiliser System Power Source Circuit (B278A)

DESCRIPTION This DTC is stored when the engine switch power source supply line is open or shorted. DTC Code DTC Detection Condition Trouble Area B ...

ID BOX EEPROM Malfunction (B2790)

DESCRIPTION This DTC is stored when the ID code box detects an internal malfunction. DTC Code DTC Detection Condition Trouble Area B2790 ...

Other materials about Toyota 4Runner:

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" ...