Toyota 4Runner: Transponder Chip Malfunction (B2793-B2795)

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Engine Immobiliser System(w/o Smart Key System) / 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 cannot be performed normally and this DTC is output.
DTC B2794 is stored when a key with an incomplete key code is inserted into the ignition key cylinder.
DTC B2795 is stored when a key with a key code that is not registered in the ECU is inserted into the ignition key cylinder.

DTC Code	DTC Detection Condition	Trouble Area
B2793	A transponder chip malfunction.	Key
B2794	A key with an incomplete key code is inserted into the ignition key cylinder.
B2795	A key with an unregistered key code is inserted into the ignition key cylinder.

CAUTION / NOTICE / HINT

NOTICE:

When the key is replaced, refer to Registration (See page ).

PROCEDURE

1.	REREGISTER KEY

(a) Clear the DTCs (See page ).

(b) Reregister the key code with the transponder key ECU assembly.

OK:

Engine starts.

END

REPLACE KEY

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 ou ...

Communication Malfunction No. 1 (B2797)

DESCRIPTION This DTC is stored when a communication error occurs between the transponder key amplifier and transponder key ECU assembly. Some possible reasons for the communication error are: 1) ...

Other materials about Toyota 4Runner:

Front Passenger Side Solar Sensor Short Circuit (B14A3)
DESCRIPTION The automatic light control sensor (solar sensor), which is installed on the upper side of the instrument panel, detects sunlight and controls the air conditioning in auto mode. The output current from the solar sensor varies according to th ...

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use these procedures to troubleshoot the smart key system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT ...