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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 532 (HYBRID CONTROL SYSTEM - DIAGNOSIS)DTC POA92/521: HYBRID GENERATOR PERFORMANCEINSPECTION PROCEDURE
2004 Toyota Matrix XR, FWD, Standard

Inspection Procedure

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2004 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
  • Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from reconnecting it while you are servicing the high-voltage system.
  • After disconnecting the service plug grip, wait for at least 5 minutes before touching any of the high-voltage connectors or terminals.

HINT:

At least 5 minutes is required to discharge the high-voltage condenser inside the inverter.

  1. READ OUTPUT DTC (HV ECU) 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the power switch ON (IG).
    3. Turn the hand-held tester ON.
    4. On the hand-held tester, enter the following menus: DIAGNOSIS / OBD/MOBD / HV ECU / DTC INFO /CURRENT CODES.
    5. Read DTCs.
      1. Result: DTC P0A92 (INF 521) and other DTCs are output 

    HINT:

    If any other codes besides P0A92 (INF 521) are output, perform troubleshooting for those DTCs first.

    YES: GO TO RELEVANT DTC CHART (See  DIAGNOSTIC TROUBLE CODE CHART   ) 

  2. INSPECT HYBRID VEHICLE GENERATOR ASSY 
    CAUTION: Wear insulated gloves before performing the following operation.
    1. Turn the power switch OFF.
    2. Remove the service plug grip (see SERVICE PLUG GRIP ).
      NOTE: Turning the power switch ON (READY) with the service plug grip removed could cause malfunction. Therefore, never turn the power switch ON (READY) in this state.
    3. Remove the inverter cover (see W/CONVERTER INVERTER ASSY in HYBRID CONTROL SYSTEM ).
    4. Disconnect the three-phase alternating current cable for the hybrid vehicle generator from the inverter.
    5. Using an ohmmeter, measure the resistance between the three-phase alternating current cable terminals of the hybrid vehicle generator.
      Fig 1: Locating Three Phase Alternating Current Cable Terminal Of Hybrid Vehicle Generator
      G02917742Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.