Engine Immobiliser System (w/ Smart Key System)

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM (w/ Smart Key System): B2799: Engine Immobiliser System Malfunction

DTC B2799 - Engine Immobiliser System Malfunction

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.





WIRING DIAGRAM





INSPECTION PROCEDURE
NOTICE: If the certification ECU (smart key ECU assembly) is replaced, register the key Engine Immobiliser System (W/ Smart Key System).

PROCEDURE

1. CHECK DTC OUTPUT
(a) Clear the DTCs Engine Immobilizer System (w/ Smart Key System).
(b) Recheck for DTCs Engine Immobilizer System (w/ Smart Key System).
OK:
DTC B2799 is not output.

NG -- RE-REGISTER ECU COMMUNICATION ID
OK -- USE SIMULATION METHOD TO CHECK
2. RE-REGISTER ECU COMMUNICATION ID
(a) Re-register the ECU communication ID Engine Immobiliser System (W/ Smart Key System).
NEXT -- Continue to next step.

3. CHECK DTC OUTPUT
(a) Clear the DTCs Engine Immobilizer System (w/ Smart Key System).
(b) Recheck for DTCs Engine Immobilizer System (w/ Smart Key System).
OK:
DTC B2799 is not output.

NG -- CHECK CONNECTOR CONNECTION CONDITION
OK -- 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.

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

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





for 1AR-FE





Text in Illustration





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

6. REPLACE ECM
(a) Replace the ECM Removal for 2GR-FE, Removal for 1AR-FE).
NEXT -- Continue to next step.

7. CHECK DTC OUTPUT
(a) Clear the DTCs Engine Immobilizer System (w/ Smart Key System).
(b) Recheck for DTCs Engine Immobilizer System (w/ Smart Key System).
OK:
DTC B2799 is not output.

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
OK -- END (ECM WAS DEFECTIVE)