B2788

DTC B2788 IGN2 input malfunction

Circuit description

This diagnosis code is output when the steering lock actuator ASSY (Steering lock ECM) detects an IG2 power supply malfunction.
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:
^ Check the fuse in this circuit before performing troubleshooting.
^ 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), please check the applicable precautions, and refer to the "Registration manual for immobilizer".