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DTC B2781: Open / Short in Steering Lock ECU [09/2015 - ]: Description

The steering lock ECU and steering lock actuator are supplied as a unit.

The steering lock ECU detects the steering lock position through the signals from the lock and unlock position sensors.

The steering lock ECU activates the steering lock motor based on permission signals from the main body ECU and the certification ECU.

The diagnosis information of the steering lock ECU is transmitted to the Techstream via the certification ECU as the steering lock ECU is not connected to the CAN communication system.

DTC Code Detection Condition Trouble Area
B2781 When either condition below is met:
  • Steering lock motor drive power circuit malfunction
  • Lock and unlock position sensors' ON condition is detected
  • Harness or connector of LIN bus line
  • Certification ECU
  • Steering lock actuator (Steering lock ECU)