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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 336 (Hybrid Vehicle Control System - Diagnostics) >> Circuit Inspection >> DTC P3125: Converter & Inverter Assembly Malfunction >> Circuit Description - DTC P3125 - Information Codes 274, 275, 276, 277 >> Inspection Procedure

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.
  1. Check for open, short and +B short in wire harness between HV ECU MIT and MIVG terminals and converter & inverter M-INVT, M-GINV terminals  . See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION .
    NOTE: Confirm that there is no open circuit in the wire harness. If the voltage between the HV ECU MIT or MIVG terminal and body ground is always more than 5V with the ignition ON, the motor inverter temperature sensor circuit has +B short.
    1. NG:  Repair or replace wire harness.
    2. OK:  Check for open in motor inverter temperature sensor and then replace converter & inverter assembly. Check motor inverter temperature sensor. See ON-VEHICLE INSPECTION OF CONVERTER & INVERTER .
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