LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 336 (Hybrid Vehicle Control System - Diagnostics) >> Circuit Inspection >> DTC P3100: HV Ecu Malfunction >> Circuit Description - Information Codes 127, 128, 138 >> 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. Is DTC of battery ECU being output  ? See HOW TO PROCEED WITH TROUBLESHOOTING HV BATTERY CONTROLLED SYSTEM .
    NOTE:

    In case of output of Information code 128, check whether V-wire harness of battery ECU DTC P3115 is open or short at first. When there is no-abnormality, go to step  2.

    1. YES:  Check applicable DTC. See HOW TO PROCEED WITH TROUBLESHOOTING HV BATTERY CONTROLLED SYSTEM .
    2. NO:  Go to  2.
    2. NOTE: The HV ECU IB terminal has +B short if there is no open in wire harness and the voltage of the IB or GB terminal is more than 5 V with the ignition ON.
  2. Check for open, short and +B short in wire harness between HV ECU IB and GB terminals and battery ECU IB and GB terminals  . See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION .
    1. NG:  Repair or replace wire harness.
    2. OK:  Replace HV ECU.
scientia non olet · About LEMON Manuals