Engine Immobilizer System (w/o Smart Key System)
THEFT DETERRENT / KEYLESS ENTRY: 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 - ECM communication ID between the transponder key ECU assembly and ECM is different and an engine start is attempted. Before troubleshooting for this DTC, make sure no engine immobiliser DTCs are output. If output, troubleshoot the engine immobiliser DTCs first.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When the transponder key ECU assembly and/or ECM is replaced, refer to Registration Engine Immobilizer System (w/o Smart Key System).
PROCEDURE
1. CLEAR DTC
(a) Clear the DTCs Engine Immobilizer System (w/o Smart Key System).
NEXT -- Continue to next step.
2. CHECK FOR DTC
(a) Check for DTCs Engine Immobilizer System (w/o Smart Key System).
OK:
DTC B2799 is not output.
NG -- REREGISTER ECU - ECM COMMUNICATION ID
OK -- USE SIMULATION METHOD TO CHECK Electronic Circuit Inspection Procedure
3. REREGISTER ECU - ECM COMMUNICATION ID
(a) Reregister the ECU - ECM communication ID Engine Immobilizer System (w/o Smart Key System).
NEXT -- Continue to next step.
4. CLEAR DTC
(a) Clear the DTCs Engine Immobilizer System (w/o Smart Key System).
NEXT -- Continue to next step.
5. CHECK FOR DTC
(a) Check for DTCs Engine Immobilizer System (w/o Smart Key System).
OK:
DTC B2799 is not output.
NG -- CHECK CONNECTION OF CONNECTOR
OK -- END
6. CHECK CONNECTION OF CONNECTOR
(a) Turn the ignition switch off.
(b) Check that the connectors are properly connected to the ECM and transponder key ECU assembly.
OK:
Connectors are properly connected.
NG -- CONNECT CONNECTOR CORRECTLY
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - ECM)
(a) Disconnect the F34 ECU connector.
(b) Disconnect the F50 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
8. REPLACE TRANSPONDER KEY ECU ASSEMBLY
(a) Temporarily replace the transponder key ECU assembly with a new one Removal.
NEXT -- Continue to next step.
9. REREGISTER ECU - ECM COMMUNICATION ID
(a) Reregister the ECU - ECM communication ID Engine Immobilizer System (w/o Smart Key System).
NEXT -- Continue to next step.
10. CLEAR DTC
(a) Clear the DTCs Engine Immobilizer System (w/o Smart Key System).
NEXT -- Continue to next step.
11. CHECK FOR DTC
(a) Check for DTCs Engine Immobilizer System (w/o Smart Key System).
OK:
DTC B2799 is not output.
NG -- REPLACE ECM Removal
OK -- END (TRANSPONDER KEY ECU IS DEFECTIVE)