LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2012 >> Prius Three >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Lin Communication System (Except Plug-In) (Diagnostic Codes) >> Lin Communication System >> DTC B278C: Lost Communication with Power Source Control >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

NOTE:
  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  • If the certification ECU (smart key ECU assembly) is replaced, register the key.
  • When using the Techstream to troubleshoot with the power switch off:

    Connect the Techstream to the DLC3, and turn the courtesy switch on and off at 1.5-second intervals until communication between the Techstream and vehicle begins.