STEERING LOCK SYSTEM, Diagnostic DTC:B2781

DTC Code DTC Name
B2781 Open / Short in Steering Lock ECU

DESCRIPTION

If the steering lock ECU determines that there is a malfunction inside the ECU, it outputs this DTC. The steering lock ECU diagnosis information cannot be read directly from the steering lock ECU by the tester. The diagnosis information from the steering lock ECU is transmitted to the tester via the certification ECU (smart key ECU assembly) using the Controller Area Network (CAN).

DTC No. DTC Detection Condition Trouble Area
B2781

  • Steering lock motor drive circuit is defective.

  • Both lock and unlock position sensors detect "ON".

 Steering lock actuator assembly (Steering lock ECU)

INSPECTION PROCEDURE

Tech Tips


  • When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following step to wake up the ECU:

    Before starting the inspection, with the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5-second intervals.


  • After replacing the steering lock actuator assembly (steering lock ECU), confirm the lock/unlock operation of the steering lock Click here.

PROCEDURE


  1. REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

    Tech Tips

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


    1. Replace the steering lock actuator assembly Click here.


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