Toyota Venza manuals

Toyota Venza: 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.


OK

USE SIMULATION METHOD TO CHECK


NG

2.

RE-REGISTER ECU COMMUNICATION ID

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



NEXT

3.

CHECK DTC OUTPUT

(a) Clear the DTCs (See page ).


(b) Recheck for DTCs (See page ).


OK:

DTC B2799 is not output.


OK

END (ECU COMMUNICATION ID WAS INCORRECT)


NG

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.


NG

CONNECT CONNECTORS PROPERLY


OK

5.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ECM)

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

(b) Disconnect the ECM connector.


(c) Measure the resistance according to the value(s) in the table below.

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

6.

REPLACE ECM

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



NEXT

7.

CHECK DTC OUTPUT

(a) Clear the DTCs (See page ).


(b) Recheck for DTCs (See page ).


OK:

DTC B2799 is not output.


OK

END (ECM WAS DEFECTIVE)


NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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