DTC B2781: Open / Short in Steering Lock ECU: Description

If the steering lock ECU (steering lock actuator assembly) determines that there is a malfunction inside the ECU, it outputs this DTC. Diagnostic communication between the steering lock ECU (steering lock actuator assembly) and the Techstream is performed via the certification ECU (smart key ECU assembly) as the steering lock ECU (steering lock actuator assembly) is not connected to CAN.

The steering lock ECU and steering lock actuator assembly are supplied as a unit. The steering lock ECU (steering lock actuator assembly) detects the steering lock position through the signals from the lock and unlock position sensors.

The steering lock ECU (steering lock actuator assembly) activates the steering lock motor based on permission signals from the power management control ECU and the certification ECU (smart key ECU assembly).