B2799 - Steering Lock System

DTC B2799 ENGINE IMMOBILIZER SYSTEM MALFUNCTION

CIRCUIT DESCRIPTION

DTC Detecting Condition:

This DTC is output when the ECM detects errors in the communication between the steering lock ECU and the ECM, and in the communication lines.
This is also output if engine start is attempted when the COMMUNICATION ID between the steering lock ECU and the ECM is different.

Before troubleshooting for this DTC, make sure that there is no DTC detected in the theft deterrent ECU and the steering lock ECU. If there is any interior verification related DTC (B1242, B2775) or key code related DTC (B279#) detected in the theft deterrent ECU and the steering lock ECU, repair them first.

In some cases, interior verification may fail due to misuse of the smart key function. In such cases, permission to start the engine is not given from the communication between the steering lock ECU and the ECM, resulting in the output of this DTC. If this DTC is output, confirm with the user whether or not the following conditions occurred in the past.

HINT:
- In cases 1 and 2, when engine start is attempted, the smart key system performs interior verification again. However, because the smart key is outside the interior verification area, the interior verification fails and permission to start the engine is not given, which results in the DTC output. At this time the steering lock ECU also detects B2775.
- In case 3, when the starter SW is turned back to the ACC position and then turned to the IG ON position again, interior verification fails and permission to start the engine is not given, which results in the DTC output. At this time the steering lock ECU also detects B2775.

Wiring Diagram:

Step 1-2:

INSPECTION PROCEDURE