Inspection Procedure
WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
If DTC P3000 - INFORMATION CODES 123 OR 125 is output, after confirming the DTC of the HV battery system, check and repair the applicable DTC. After repairing it, record the DTC of the HV ECU, freeze frame data and history of operation. Then, clear the DTC and check it one more time after starting the system again ("READY" light ON).