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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 P3120: HV Transaxle Malfunction >> Circuit Description - DTC P3120 - Information Codes 234, 235, 236, 237 >> 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 HV battery ECU being output? 
    1. YES  : Check applicable DTC.
    2. NO:  Go to step 2.
  2. Turn the ignition switch to ST(ON) and check if malfunction occurs again. 
    1. NO:  Replace system main relay.
    2. YES  : Replace HV transaxle motor or generator.
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