DTC B2781: Open / Short in Steering Lock ECU [11/2018 - 12/2021]: Description
The steering lock ECU and steering lock motor are built into the steering lock actuator with ECU assembly.
The steering lock ECU (steering lock actuator with ECU assembly) detects whether the steering lock is in the lock or unlock position by using the lock sensor and unlock sensor of the steering lock motor.
The steering lock ECU (steering lock actuator with ECU assembly) receives lock and unlock request signals from the certification ECU (smart key ECU assembly) and responds with lock and unlock operation signals.
The steering lock ECU (steering lock actuator with ECU assembly) is not connected to the CAN communication system. However, the steering lock ECU (steering lock actuator with ECU assembly) is connected to the certification ECU (smart key ECU assembly) via LIN communication and communicates with other components via CAN communication through the certification ECU (smart key ECU assembly).
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| B2781 | Open / Short in Steering Lock ECU | One of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)):
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DTC Output Confirmation Operation:
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| Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
|---|---|
| The steering cannot be locked or unlocked. For this reason, the engine cannot be started. | Prohibits the engine from being started. |
| DTC No. | Data List and Active Test |
|---|---|
| B2781 | Smart Key
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