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DTC B2781: Open / Short in Steering Lock ECU [08/2015 - 08/2019]: Description

The steering lock ECU and steering lock actuator assembly 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 power management control 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 Either condition is met:
  • A steering lock motor drive power circuit malfunction.
  • The lock and unlock position sensors are detected to be on.
  • Steering lock actuator assembly (steering lock ECU)
  • LIN communication system
  • Harness or connector of LIN bus line