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.

Check for open and short in wire harness between HV transaxle and HV ECU . See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION .
Terminals for checking open and short:

Fig 1: Identifying Terminals Likely To Incur Shorts Or Opens Between MG1 & HV ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Repair or replace wire harness.
2. OK: Check for open in generator resolver or inter-phase short and then replace HV transaxle generator. Check generator resolver. See SPEED SENSOR (RESOLVER) AND TEMPERATURE SENSOR .