Technical Description (Comment)
WARNING: This page is about a different car, the 2008 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
If the M.U.T.-III cannot communicate with the KOS-ECU, the CAN bus lines may be defective. If the KOS-ECU does not work, the KOS-ECU or the power supply circuit may be defective.