Toyota Venza: Engine Immobiliser System Malfunction (B2799)

Toyota Venza Service Manual / Theft Deterrent / Keyless Entry / Engine Immobiliser System(w/ Smart Key System) / Engine Immobiliser System Malfunction (B2799)

DESCRIPTION

This DTC is stored when one of the following occurs: 1) the ECM detects an error in its own communication with the certification ECU (smart key ECU assembly); 2) the ECM detects an error in the communication lines; or 3) the ECU communication ID between the certification ECU (smart key ECU assembly) and ECM is different when an engine start is attempted.

HINT:

Before troubleshooting this DTC, make sure that no certification ECU (smart key ECU assembly) DTCs are present. If present, troubleshoot the certification ECU (smart key ECU assembly) DTCs first.

DTC No.	DTC Detection Condition	Trouble Area
B2799	One of the following conditions is met: Error in communication between ECM and certification ECU (smart key ECU assembly) Error in communication lines Communication ID is different between certification ECU (smart key ECU assembly) and ECM during communication	Wire harness or connector ECM Certification ECU (Smart key ECU assembly)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the certification ECU (smart key ECU assembly) is replaced, register the key (See page ).

PROCEDURE

1.	CHECK DTC OUTPUT

(a) Clear the DTCs (See page ).

(b) Recheck for DTCs (See page ).

OK:

DTC B2799 is not output.

USE SIMULATION METHOD TO CHECK

2.	RE-REGISTER ECU COMMUNICATION ID

(a) Re-register the ECU communication ID (See page ).

3.	CHECK DTC OUTPUT

(a) Clear the DTCs (See page ).

(b) Recheck for DTCs (See page ).

OK:

DTC B2799 is not output.

END (ECU COMMUNICATION ID WAS INCORRECT)

4.	CHECK CONNECTOR CONNECTION CONDITION

(a) Turn the engine switch off.

(b) Check that the connectors are properly connected to the ECM and certification ECU (smart key ECU assembly).

OK:

Connectors are properly connected.

CONNECT CONNECTORS PROPERLY

5.	CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ECM)

(a) Disconnect the certification ECU (smart key ECU assembly) connector.

(b) Disconnect the ECM connector.

Standard Resistance:

for 2GR-FE

Tester Connection	Condition	Specified Condition
D25-34 (EFII) - A41-29 (IMO)	Always	Below 1 Ω
D25-35 (EFIO) - A41-40 (IMI)	Always	Below 1 Ω
D25-34 (EFII) - Body ground	Always	10 kΩ or higher
D25-35 (EFIO) - Body ground	Always	10 kΩ or higher

for 1AR-FE

Tester Connection	Condition	Specified Condition
D25-34 (EFII) - A49-10 (IMO)	Always	Below 1 Ω
D25-35 (EFIO) - A49-11 (IMI)	Always	Below 1 Ω
D25-34 (EFII) - Body ground	Always	10 kΩ or higher
D25-35 (EFIO) - Body ground	Always	10 kΩ or higher

Text in Illustration

*1	Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly))
*2	Front view of wire harness connector (to ECM)
*3	for 2GR-FE
*4	for 1AR-FE

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	REPLACE ECM

(a) Replace the ECM (See page for 2GR-FE,
for 1AR-FE).

7.	CHECK DTC OUTPUT

(a) Clear the DTCs (See page ).

(b) Recheck for DTCs (See page ).

OK:

DTC B2799 is not output.

END (ECM WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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