Toyota 4Runner manuals

Toyota 4Runner: 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

1.

CLEAR DTC

(a) Clear the DTCs (See page ).



NEXT

2.

CHECK FOR DTC

(a) Check for DTCs (See page ).


OK:

DTC B2784 is not output.


OK

USE SIMULATION METHOD TO CHECK


NG

REPLACE TRANSPONDER KEY AMPLIFIER

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART HINT: If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page" bel ...

Transponder Chip Malfunction (B2793-B2795)
DESCRIPTION DTC B2793 is stored when a malfunction is found in the key during key code registration or a key code is not registered normally. Replace the key if key code registration c ...

Other materials about Toyota 4Runner:

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 ...

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" ...

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