Toyota Sienna Service Manual: Transponder Chip Malfunction

Toyota Sienna Service Manual / Engine immobiliser / Problem symptoms table / Diagnostic trouble code chart / Transponder Chip Malfunction

DTC B2793 Transponder Chip Malfunction

DESCRIPTION

This DTC is output when a malfunction is found in the key during the key code registration or the key code is not registered normally. Replace the key when the key code registration is not performed normally and this DTC is detected.

DESCRIPTION

INSPECTION PROCEDURE

1 CHECK DTC OUTPUT

Delete the DTC.
Insert the key into the ignition key cylinder.
Check that no code is output.

OK: No DTC is output.

2 RE-REGISTER KEY

Delete the DTC.
Re-register the key and insert this key into the ignition key cylinder.

Check that the engine starts with the key.

OK: The engine starts

REPLACE KEY

Antenna Coil Open / Short

DTC B2784 Antenna Coil Open / Short DESCRIPTION The transponder key coil is built into the transponder key amplifier and receives a key code signal from the transponder chip in the key. This sign ...

Unmatched Encryption Code

DTC B2794 Unmatched Encryption Code DESCRIPTION This DTC is output when a key with an incomplete key code is inserted into the ignition key cylinder. DTC No. DTC Detection Condi ...

Other materials:

Engine Coolant Temperature Circuit Range / Performance Problem
DESCRIPTION Refer to DTC P0115 (See page ES-133). MONITOR DESCRIPTION The ECT sensor is used to monitor the ECT. The ECT sensor has a built-in thermistor with a resistance that varies according to the temperature of the engine coolant. When the ECT becomes low, the resistance of the ...

Removal
HINT: Use the same procedures for the RH side and LH side. The procedures listed below are for the LH side. 1. PRECAUTION CAUTION: Be sure to read "PRECAUTION" thoroughly before servicing. 2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL NOTICE: Wait for 90 seconds ...

Removal
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