Technical Description (Comment)
WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
When the vehicle power does not turn ON (not possible with both of power supply mode ACC and ON), the battery, CAN bus line, OSS-ECU, OSS-ECU power supply, or ground circuit may have a problem.
NOTE:
OSS-ECU can communicate with the scan tool (M.U.T.-III) even when the engine switch is in the "OFF" position.