B2782

DTC B2782 Steering lock power supply circuit malfunction (Smart ECM-side malfunction)

Circuit description

The smart key computer ASSY (Collation ECM) has a built-in power supply ECM function.
This diagnosis code is output when it is judged that there is an error in the SLR+ input that is directly input into the steering lock actuator ASSY (Steering lock ECM) from the smart key computer ASSY (Collation ECM).
As the steering lock actuator ASSY (Steering lock ECM) is not connected to CAN communication, CAN communication with external parts is performed via the LIN communication-connected smart key computer ASSY (Collation ECM).





Vehicle state and fail safe measures during detection





Related current data display and work support





Circuit figure





Inspection steps

CAUTION:
^ The steering lock system is equipped with functions that use multiplex communication. Firstly, please follow the directions in "How to troubleshoot" and then perform troubleshooting after confirming that there is no malfunction in the communication system.
^ After repair is completed, perform a diagnostic code output confirmation and check that there is no further output of diagnostic codes.
^ When replacing the steering lock actuator ASSY (Steering lock ECM) or the smart key computer ASSY (Collation ECM), please check the applicable precautions, and refer to the "Registration manual for immobilizer".
^ After turning the ignition to IG OFF, there may be cases where you have to wait before disconnecting the cable to the negative terminal of the battery. Therefore, please check the precautions for disconnecting the battery terminals before starting work.