Toyota Venza: Communication Malfunction No. 1 (B2797)

Toyota Venza Service Manual / Theft Deterrent / Keyless Entry / Engine Immobiliser System(w/o Smart Key System) / Communication Malfunction No. 1 (B2797)

DESCRIPTION

This DTC is stored when an error occurs in communication between the transponder key amplifier and the transponder key ECU assembly.

HINT:

Some noise is found in the communication line.

DTC No.	DTC Detection Condition	Trouble Area
B2797	Keys are positioned too close to each other, or noise occurs in communication line.	Key Transponder key amplifier Transponder key ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

If the transponder key ECU assembly is replaced, register the key and ECU communication ID (See page ).

PROCEDURE

CHECK KEY

(a) Check whether the ignition key being used is near other ignition keys, as shown in the illustration. Also, check whether the key ring is in contact with the key grip.

Result:

Result	Proceed to
Key is near other keys and/or key ring is in contact with key grip.	A
Key is not near other keys and key ring is not in contact with key grip.	B

GO TO STEP 3

2.	CHECK DTC OUTPUT

(a) Separate the keys from each other or remove the key ring.

(b) Clear the DTCs (See page ).

OK:

No DTC is output.

END (KEYS WERE POSITIONED TOO CLOSE TO EACH OTHER)

3.	REPLACE TRANSPONDER KEY AMPLIFIER

(a) Replace the transponder key amplifier (See page ).

4.	CHECK ENGINE START

(a) Check that the engine starts.

OK:

The engine starts.

END (TRANSPONDER KEY AMPLIFIER WAS DEFECTIVE)

REPLACE TRANSPONDER KEY ECU ASSEMBLY

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DESCRIPTION This DTC is stored when one of the following occurs: 1) the ECM detects errors in its own communications with the transponder key ECU assembly; 2) the ECM detects errors in the commun ...

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