Engine Immobiliser System (w/o Smart Key System)

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM (w/o Smart Key System): B2799: Engine Immobiliser System Malfunction
B2799 - Engine Immobiliser System Malfunction

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 communication lines; or 3) the ECU communication ID between the transponder key ECU assembly and ECM is different when an engine start is attempted.

Before troubleshooting for this DTC, make sure that no transponder key ECU assembly DTCs are present. If present, troubleshoot the transponder key ECU assembly DTCs first.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT

(a) Clear the DTCs Engine Immobiliser System (w/o Smart Key System).

(b) Recheck for DTCs.

OK:

DTC B2799 is not output.

NG -- RE-REGISTER ECU COMMUNICATION ID

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

2. RE-REGISTER ECU COMMUNICATION ID

(a) Re-register the ECU communication ID Engine Immobiliser System (W/O Smart Key System).

NEXT -- Continue to next step.

3. CHECK DTC OUTPUT

(a) Clear the DTCs Engine Immobiliser System (w/o Smart Key System).

(b) Recheck for DTCs.

OK:

DTC B2799 is not output.

NG -- CHECK CONNECTION OF CONNECTOR

OK -- END (ECU COMMUNICATION ID WAS INCORRECT)

4. CHECK CONNECTION OF CONNECTOR

(a) Turn the ignition switch off.

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

OK:

Connectors are properly connected.

NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - ECM)

(a) Disconnect the E15 ECU and A24*1 or A55*2 ECM connectors.

*1: for 2AR-FE

*2: for 2GR-FE





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

Resistance:

for 2AR-FE





for 2GR-FE





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. REPLACE ECM

(a) Replace the ECM.

Removal for 2AR-FE)

Removal for 2GR-FE)

NEXT -- Continue to next step.

7. REGISTER ECU COMMUNICATION ID

(a) Register the ECU communication ID Engine Immobiliser System (W/O Smart Key System).

NEXT -- Continue to next step.

8. CHECK DTC OUTPUT

(a) Clear the DTCs Engine Immobiliser System (w/o Smart Key System).

(b) Recheck for DTCs.

OK:

DTC B2799 is not output.

NG -- REPLACE TRANSPONDER KEY ECU ASSEMBLY Removal

OK -- END (ECM WAS DEFECTIVE)