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DTC B2781 Open/Short in Steering Lock ECU: 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 main body ECU and 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 DETECTION CONDITION CHART

DTC Code DTC Detection Condition Trouble Area
B2781 When either condition below is met:
  • There is a steering lock motor drive power circuit malfunction.
  • The on state of the lock and unlock position sensors is detected.
  • Steering lock actuator assembly (steering lock ECU)
  • ECU aggregation box assembly (certification ECU)
  • Harness or connector