Circuit Description

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.

The battery ECU receives information of the AC ECU, system main relay connection signals, etc. sent from the HV ECU, and stores DTC when an error is detected in the receives information.

Fig 1: Identifying DTC P3002 Trouble Areas

NOTE: Check DTC of other ECU's and see whether any communication error of the HV ECU is stored or not. If HV communication errors are stored in then one ECU, replace the HV ECU.