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 INFORMATION CODES 317 OR 319 is output, check if other information codes are recorded. If they are recorded, check and repair those codes first.
If INFORMATION CODE 317 OR 319 alone is recorded, replace the converter & inverter assembly.
If INFORMATION CODE 320 is output, replace the converter & inverter assembly.