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STEERING LOCK SYSTEM, Diagnostic DTC:B2781

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DTC Code DTC Name
B2781 Open / Short in Steering Lock ECU
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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 Detecting 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)
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INSPECTION PROCEDURE

Tip:

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's door. Then (with the engine switch still off) open and close any door several times in 1.5-second intervals.

Note:

If the steering lock actuator assembly (steering lock ECU) is replaced, with the engine switch off and the shift lever in the N position, open and close the driver's door to record the current lock position into the steering lock ECU. If this is not performed, the engine may not start.

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PROCEDURE


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    REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

    Tip:

    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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    END