Engine Immobiliser System (W/O Smart Key System)

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

DTC B2799 - Engine Immobiliser System Malfunction

DESCRIPTION

This DTC is output when the ECM detects errors in communication with the transponder key ECU, and in the communication lines.
This DTC is also output when an engine start is attempted while the ECU communication ID between the transponder key ECU and the ECM is different.
Before troubleshooting for this DTC, make sure that there is no DTC detected in the transponder key ECU. If there is any key code related DTC detected in the transponder key ECU, repair it first.






WIRING DIAGRAM





INSPECTION PROCEDURE
NOTICE:
- If the transponder key ECU assembly is replaced, register the key and ECU communication ID Engine Immobiliser System (W/O Smart Key System).
- If the ECM is replaced, register the ECU communication ID Engine Immobiliser System (W/O Smart Key System).

PROCEDURE

1. RE-REGISTER ECU COMMUNICATION ID
(a) Re-register the ECU communication ID Engine Immobiliser System (W/O Smart Key System) between the transponder key ECU assembly and ECM.
(b) Check that the engine starts.
OK:
The engine starts.
OK -- END
NG -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - ECM)
(a) Disconnect the E15 ECU and A24*1 or A55*2 ECM connectors.




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






*1: for 2AZ-FE
*2: for 2GR-FE
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. REPLACE TRANSPONDER KEY ECU ASSEMBLY
(a) After replacing the transponder key ECU assembly with a normally functioning transponder key ECU assembly, check that the engine starts.
OK:
The engine starts.
NG -- REPLACE ECM
OK -- END