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 any of INFORMATION CODES 231, 232 OR 233 are output, replace the system main relay.
If one of the INFORMATION CODES 231, 232 OR 233 and any of INFORMATION CODES 224, 225, 226, 227, 228 OR 229 are recorded at the same time, also replace the HV ECU.